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1 //===--- Parser.cpp - C Language Family Parser ----------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // This file implements the Parser interfaces.
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10 //
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11 //===----------------------------------------------------------------------===//
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12
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13 #include "clang/Parse/Parser.h"
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14 #include "clang/AST/ASTConsumer.h"
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15 #include "clang/AST/ASTContext.h"
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16 #include "clang/AST/DeclTemplate.h"
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173
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17 #include "clang/Basic/FileManager.h"
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150
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18 #include "clang/Parse/ParseDiagnostic.h"
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19 #include "clang/Parse/RAIIObjectsForParser.h"
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20 #include "clang/Sema/DeclSpec.h"
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21 #include "clang/Sema/ParsedTemplate.h"
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22 #include "clang/Sema/Scope.h"
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23 #include "llvm/Support/Path.h"
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24 using namespace clang;
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25
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26
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27 namespace {
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28 /// A comment handler that passes comments found by the preprocessor
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29 /// to the parser action.
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30 class ActionCommentHandler : public CommentHandler {
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31 Sema &S;
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32
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33 public:
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34 explicit ActionCommentHandler(Sema &S) : S(S) { }
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35
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36 bool HandleComment(Preprocessor &PP, SourceRange Comment) override {
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37 S.ActOnComment(Comment);
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38 return false;
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39 }
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40 };
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41 } // end anonymous namespace
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42
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43 IdentifierInfo *Parser::getSEHExceptKeyword() {
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44 // __except is accepted as a (contextual) keyword
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45 if (!Ident__except && (getLangOpts().MicrosoftExt || getLangOpts().Borland))
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46 Ident__except = PP.getIdentifierInfo("__except");
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47
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48 return Ident__except;
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49 }
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50
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51 Parser::Parser(Preprocessor &pp, Sema &actions, bool skipFunctionBodies)
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207
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52 : PP(pp), PreferredType(pp.isCodeCompletionEnabled()), Actions(actions),
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53 Diags(PP.getDiagnostics()), GreaterThanIsOperator(true),
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54 ColonIsSacred(false), InMessageExpression(false),
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55 TemplateParameterDepth(0), ParsingInObjCContainer(false) {
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150
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56 SkipFunctionBodies = pp.isCodeCompletionEnabled() || skipFunctionBodies;
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57 Tok.startToken();
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58 Tok.setKind(tok::eof);
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59 Actions.CurScope = nullptr;
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60 NumCachedScopes = 0;
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61 CurParsedObjCImpl = nullptr;
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62
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63 // Add #pragma handlers. These are removed and destroyed in the
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64 // destructor.
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65 initializePragmaHandlers();
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66
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67 CommentSemaHandler.reset(new ActionCommentHandler(actions));
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68 PP.addCommentHandler(CommentSemaHandler.get());
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69
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70 PP.setCodeCompletionHandler(*this);
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71 }
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72
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73 DiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) {
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74 return Diags.Report(Loc, DiagID);
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75 }
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76
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77 DiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) {
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78 return Diag(Tok.getLocation(), DiagID);
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79 }
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80
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81 /// Emits a diagnostic suggesting parentheses surrounding a
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82 /// given range.
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83 ///
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84 /// \param Loc The location where we'll emit the diagnostic.
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85 /// \param DK The kind of diagnostic to emit.
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86 /// \param ParenRange Source range enclosing code that should be parenthesized.
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87 void Parser::SuggestParentheses(SourceLocation Loc, unsigned DK,
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88 SourceRange ParenRange) {
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89 SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd());
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90 if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) {
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91 // We can't display the parentheses, so just dig the
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92 // warning/error and return.
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93 Diag(Loc, DK);
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94 return;
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95 }
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96
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97 Diag(Loc, DK)
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98 << FixItHint::CreateInsertion(ParenRange.getBegin(), "(")
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99 << FixItHint::CreateInsertion(EndLoc, ")");
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100 }
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101
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102 static bool IsCommonTypo(tok::TokenKind ExpectedTok, const Token &Tok) {
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103 switch (ExpectedTok) {
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104 case tok::semi:
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105 return Tok.is(tok::colon) || Tok.is(tok::comma); // : or , for ;
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106 default: return false;
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107 }
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108 }
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109
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110 bool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID,
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111 StringRef Msg) {
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112 if (Tok.is(ExpectedTok) || Tok.is(tok::code_completion)) {
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113 ConsumeAnyToken();
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114 return false;
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115 }
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116
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117 // Detect common single-character typos and resume.
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118 if (IsCommonTypo(ExpectedTok, Tok)) {
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119 SourceLocation Loc = Tok.getLocation();
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120 {
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121 DiagnosticBuilder DB = Diag(Loc, DiagID);
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122 DB << FixItHint::CreateReplacement(
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123 SourceRange(Loc), tok::getPunctuatorSpelling(ExpectedTok));
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124 if (DiagID == diag::err_expected)
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125 DB << ExpectedTok;
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126 else if (DiagID == diag::err_expected_after)
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127 DB << Msg << ExpectedTok;
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128 else
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129 DB << Msg;
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130 }
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131
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132 // Pretend there wasn't a problem.
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133 ConsumeAnyToken();
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134 return false;
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135 }
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136
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137 SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
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138 const char *Spelling = nullptr;
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139 if (EndLoc.isValid())
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140 Spelling = tok::getPunctuatorSpelling(ExpectedTok);
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141
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142 DiagnosticBuilder DB =
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143 Spelling
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144 ? Diag(EndLoc, DiagID) << FixItHint::CreateInsertion(EndLoc, Spelling)
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145 : Diag(Tok, DiagID);
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146 if (DiagID == diag::err_expected)
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147 DB << ExpectedTok;
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148 else if (DiagID == diag::err_expected_after)
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149 DB << Msg << ExpectedTok;
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150 else
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151 DB << Msg;
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152
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153 return true;
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154 }
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155
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156 bool Parser::ExpectAndConsumeSemi(unsigned DiagID) {
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157 if (TryConsumeToken(tok::semi))
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158 return false;
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159
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160 if (Tok.is(tok::code_completion)) {
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161 handleUnexpectedCodeCompletionToken();
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162 return false;
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163 }
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164
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165 if ((Tok.is(tok::r_paren) || Tok.is(tok::r_square)) &&
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166 NextToken().is(tok::semi)) {
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167 Diag(Tok, diag::err_extraneous_token_before_semi)
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168 << PP.getSpelling(Tok)
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169 << FixItHint::CreateRemoval(Tok.getLocation());
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170 ConsumeAnyToken(); // The ')' or ']'.
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171 ConsumeToken(); // The ';'.
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172 return false;
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173 }
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174
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175 return ExpectAndConsume(tok::semi, DiagID);
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176 }
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177
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178 void Parser::ConsumeExtraSemi(ExtraSemiKind Kind, DeclSpec::TST TST) {
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179 if (!Tok.is(tok::semi)) return;
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180
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181 bool HadMultipleSemis = false;
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182 SourceLocation StartLoc = Tok.getLocation();
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183 SourceLocation EndLoc = Tok.getLocation();
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184 ConsumeToken();
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185
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186 while ((Tok.is(tok::semi) && !Tok.isAtStartOfLine())) {
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187 HadMultipleSemis = true;
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188 EndLoc = Tok.getLocation();
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189 ConsumeToken();
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190 }
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191
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192 // C++11 allows extra semicolons at namespace scope, but not in any of the
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193 // other contexts.
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194 if (Kind == OutsideFunction && getLangOpts().CPlusPlus) {
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195 if (getLangOpts().CPlusPlus11)
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196 Diag(StartLoc, diag::warn_cxx98_compat_top_level_semi)
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197 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
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198 else
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199 Diag(StartLoc, diag::ext_extra_semi_cxx11)
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200 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
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201 return;
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202 }
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203
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204 if (Kind != AfterMemberFunctionDefinition || HadMultipleSemis)
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205 Diag(StartLoc, diag::ext_extra_semi)
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206 << Kind << DeclSpec::getSpecifierName(TST,
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207 Actions.getASTContext().getPrintingPolicy())
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208 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
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209 else
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210 // A single semicolon is valid after a member function definition.
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211 Diag(StartLoc, diag::warn_extra_semi_after_mem_fn_def)
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212 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
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213 }
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214
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215 bool Parser::expectIdentifier() {
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216 if (Tok.is(tok::identifier))
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217 return false;
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218 if (const auto *II = Tok.getIdentifierInfo()) {
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219 if (II->isCPlusPlusKeyword(getLangOpts())) {
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220 Diag(Tok, diag::err_expected_token_instead_of_objcxx_keyword)
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221 << tok::identifier << Tok.getIdentifierInfo();
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222 // Objective-C++: Recover by treating this keyword as a valid identifier.
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223 return false;
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224 }
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225 }
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226 Diag(Tok, diag::err_expected) << tok::identifier;
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227 return true;
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228 }
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229
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207
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230 void Parser::checkCompoundToken(SourceLocation FirstTokLoc,
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231 tok::TokenKind FirstTokKind, CompoundToken Op) {
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232 if (FirstTokLoc.isInvalid())
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233 return;
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234 SourceLocation SecondTokLoc = Tok.getLocation();
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235
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236 // If either token is in a macro, we expect both tokens to come from the same
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237 // macro expansion.
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238 if ((FirstTokLoc.isMacroID() || SecondTokLoc.isMacroID()) &&
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239 PP.getSourceManager().getFileID(FirstTokLoc) !=
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240 PP.getSourceManager().getFileID(SecondTokLoc)) {
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241 Diag(FirstTokLoc, diag::warn_compound_token_split_by_macro)
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242 << (FirstTokKind == Tok.getKind()) << FirstTokKind << Tok.getKind()
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243 << static_cast<int>(Op) << SourceRange(FirstTokLoc);
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244 Diag(SecondTokLoc, diag::note_compound_token_split_second_token_here)
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245 << (FirstTokKind == Tok.getKind()) << Tok.getKind()
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246 << SourceRange(SecondTokLoc);
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247 return;
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248 }
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249
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250 // We expect the tokens to abut.
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251 if (Tok.hasLeadingSpace() || Tok.isAtStartOfLine()) {
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252 SourceLocation SpaceLoc = PP.getLocForEndOfToken(FirstTokLoc);
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253 if (SpaceLoc.isInvalid())
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254 SpaceLoc = FirstTokLoc;
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255 Diag(SpaceLoc, diag::warn_compound_token_split_by_whitespace)
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256 << (FirstTokKind == Tok.getKind()) << FirstTokKind << Tok.getKind()
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257 << static_cast<int>(Op) << SourceRange(FirstTokLoc, SecondTokLoc);
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258 return;
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259 }
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260 }
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261
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150
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262 //===----------------------------------------------------------------------===//
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263 // Error recovery.
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264 //===----------------------------------------------------------------------===//
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265
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266 static bool HasFlagsSet(Parser::SkipUntilFlags L, Parser::SkipUntilFlags R) {
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267 return (static_cast<unsigned>(L) & static_cast<unsigned>(R)) != 0;
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268 }
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269
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270 /// SkipUntil - Read tokens until we get to the specified token, then consume
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271 /// it (unless no flag StopBeforeMatch). Because we cannot guarantee that the
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272 /// token will ever occur, this skips to the next token, or to some likely
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273 /// good stopping point. If StopAtSemi is true, skipping will stop at a ';'
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274 /// character.
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275 ///
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276 /// If SkipUntil finds the specified token, it returns true, otherwise it
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277 /// returns false.
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278 bool Parser::SkipUntil(ArrayRef<tok::TokenKind> Toks, SkipUntilFlags Flags) {
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279 // We always want this function to skip at least one token if the first token
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280 // isn't T and if not at EOF.
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281 bool isFirstTokenSkipped = true;
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282 while (1) {
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283 // If we found one of the tokens, stop and return true.
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284 for (unsigned i = 0, NumToks = Toks.size(); i != NumToks; ++i) {
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285 if (Tok.is(Toks[i])) {
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286 if (HasFlagsSet(Flags, StopBeforeMatch)) {
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287 // Noop, don't consume the token.
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288 } else {
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289 ConsumeAnyToken();
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290 }
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291 return true;
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292 }
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293 }
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294
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295 // Important special case: The caller has given up and just wants us to
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296 // skip the rest of the file. Do this without recursing, since we can
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297 // get here precisely because the caller detected too much recursion.
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298 if (Toks.size() == 1 && Toks[0] == tok::eof &&
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299 !HasFlagsSet(Flags, StopAtSemi) &&
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300 !HasFlagsSet(Flags, StopAtCodeCompletion)) {
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301 while (Tok.isNot(tok::eof))
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302 ConsumeAnyToken();
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303 return true;
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304 }
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305
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306 switch (Tok.getKind()) {
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307 case tok::eof:
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308 // Ran out of tokens.
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309 return false;
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310
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311 case tok::annot_pragma_openmp:
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312 case tok::annot_pragma_openmp_end:
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313 // Stop before an OpenMP pragma boundary.
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314 if (OpenMPDirectiveParsing)
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315 return false;
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316 ConsumeAnnotationToken();
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317 break;
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318 case tok::annot_module_begin:
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319 case tok::annot_module_end:
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320 case tok::annot_module_include:
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321 // Stop before we change submodules. They generally indicate a "good"
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322 // place to pick up parsing again (except in the special case where
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323 // we're trying to skip to EOF).
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324 return false;
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325
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326 case tok::code_completion:
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327 if (!HasFlagsSet(Flags, StopAtCodeCompletion))
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328 handleUnexpectedCodeCompletionToken();
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329 return false;
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330
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331 case tok::l_paren:
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332 // Recursively skip properly-nested parens.
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333 ConsumeParen();
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334 if (HasFlagsSet(Flags, StopAtCodeCompletion))
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335 SkipUntil(tok::r_paren, StopAtCodeCompletion);
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336 else
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337 SkipUntil(tok::r_paren);
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338 break;
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339 case tok::l_square:
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340 // Recursively skip properly-nested square brackets.
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341 ConsumeBracket();
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342 if (HasFlagsSet(Flags, StopAtCodeCompletion))
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343 SkipUntil(tok::r_square, StopAtCodeCompletion);
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344 else
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345 SkipUntil(tok::r_square);
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346 break;
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347 case tok::l_brace:
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348 // Recursively skip properly-nested braces.
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349 ConsumeBrace();
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350 if (HasFlagsSet(Flags, StopAtCodeCompletion))
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351 SkipUntil(tok::r_brace, StopAtCodeCompletion);
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352 else
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353 SkipUntil(tok::r_brace);
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354 break;
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355 case tok::question:
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356 // Recursively skip ? ... : pairs; these function as brackets. But
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357 // still stop at a semicolon if requested.
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358 ConsumeToken();
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359 SkipUntil(tok::colon,
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360 SkipUntilFlags(unsigned(Flags) &
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361 unsigned(StopAtCodeCompletion | StopAtSemi)));
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362 break;
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363
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364 // Okay, we found a ']' or '}' or ')', which we think should be balanced.
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365 // Since the user wasn't looking for this token (if they were, it would
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366 // already be handled), this isn't balanced. If there is a LHS token at a
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367 // higher level, we will assume that this matches the unbalanced token
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368 // and return it. Otherwise, this is a spurious RHS token, which we skip.
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369 case tok::r_paren:
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370 if (ParenCount && !isFirstTokenSkipped)
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371 return false; // Matches something.
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372 ConsumeParen();
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373 break;
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374 case tok::r_square:
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375 if (BracketCount && !isFirstTokenSkipped)
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376 return false; // Matches something.
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377 ConsumeBracket();
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378 break;
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379 case tok::r_brace:
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380 if (BraceCount && !isFirstTokenSkipped)
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381 return false; // Matches something.
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382 ConsumeBrace();
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383 break;
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384
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385 case tok::semi:
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386 if (HasFlagsSet(Flags, StopAtSemi))
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387 return false;
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388 LLVM_FALLTHROUGH;
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389 default:
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390 // Skip this token.
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391 ConsumeAnyToken();
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392 break;
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393 }
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394 isFirstTokenSkipped = false;
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395 }
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396 }
|
|
|
397
|
|
|
398 //===----------------------------------------------------------------------===//
|
|
|
399 // Scope manipulation
|
|
|
400 //===----------------------------------------------------------------------===//
|
|
|
401
|
|
|
402 /// EnterScope - Start a new scope.
|
|
|
403 void Parser::EnterScope(unsigned ScopeFlags) {
|
|
|
404 if (NumCachedScopes) {
|
|
|
405 Scope *N = ScopeCache[--NumCachedScopes];
|
|
|
406 N->Init(getCurScope(), ScopeFlags);
|
|
|
407 Actions.CurScope = N;
|
|
|
408 } else {
|
|
|
409 Actions.CurScope = new Scope(getCurScope(), ScopeFlags, Diags);
|
|
|
410 }
|
|
|
411 }
|
|
|
412
|
|
|
413 /// ExitScope - Pop a scope off the scope stack.
|
|
|
414 void Parser::ExitScope() {
|
|
|
415 assert(getCurScope() && "Scope imbalance!");
|
|
|
416
|
|
|
417 // Inform the actions module that this scope is going away if there are any
|
|
|
418 // decls in it.
|
|
|
419 Actions.ActOnPopScope(Tok.getLocation(), getCurScope());
|
|
|
420
|
|
|
421 Scope *OldScope = getCurScope();
|
|
|
422 Actions.CurScope = OldScope->getParent();
|
|
|
423
|
|
|
424 if (NumCachedScopes == ScopeCacheSize)
|
|
|
425 delete OldScope;
|
|
|
426 else
|
|
|
427 ScopeCache[NumCachedScopes++] = OldScope;
|
|
|
428 }
|
|
|
429
|
|
|
430 /// Set the flags for the current scope to ScopeFlags. If ManageFlags is false,
|
|
|
431 /// this object does nothing.
|
|
|
432 Parser::ParseScopeFlags::ParseScopeFlags(Parser *Self, unsigned ScopeFlags,
|
|
|
433 bool ManageFlags)
|
|
|
434 : CurScope(ManageFlags ? Self->getCurScope() : nullptr) {
|
|
|
435 if (CurScope) {
|
|
|
436 OldFlags = CurScope->getFlags();
|
|
|
437 CurScope->setFlags(ScopeFlags);
|
|
|
438 }
|
|
|
439 }
|
|
|
440
|
|
|
441 /// Restore the flags for the current scope to what they were before this
|
|
|
442 /// object overrode them.
|
|
|
443 Parser::ParseScopeFlags::~ParseScopeFlags() {
|
|
|
444 if (CurScope)
|
|
|
445 CurScope->setFlags(OldFlags);
|
|
|
446 }
|
|
|
447
|
|
|
448
|
|
|
449 //===----------------------------------------------------------------------===//
|
|
|
450 // C99 6.9: External Definitions.
|
|
|
451 //===----------------------------------------------------------------------===//
|
|
|
452
|
|
|
453 Parser::~Parser() {
|
|
|
454 // If we still have scopes active, delete the scope tree.
|
|
|
455 delete getCurScope();
|
|
|
456 Actions.CurScope = nullptr;
|
|
|
457
|
|
|
458 // Free the scope cache.
|
|
|
459 for (unsigned i = 0, e = NumCachedScopes; i != e; ++i)
|
|
|
460 delete ScopeCache[i];
|
|
|
461
|
|
|
462 resetPragmaHandlers();
|
|
|
463
|
|
|
464 PP.removeCommentHandler(CommentSemaHandler.get());
|
|
|
465
|
|
|
466 PP.clearCodeCompletionHandler();
|
|
|
467
|
|
173
|
468 DestroyTemplateIds();
|
|
150
|
469 }
|
|
|
470
|
|
|
471 /// Initialize - Warm up the parser.
|
|
|
472 ///
|
|
|
473 void Parser::Initialize() {
|
|
|
474 // Create the translation unit scope. Install it as the current scope.
|
|
|
475 assert(getCurScope() == nullptr && "A scope is already active?");
|
|
|
476 EnterScope(Scope::DeclScope);
|
|
|
477 Actions.ActOnTranslationUnitScope(getCurScope());
|
|
|
478
|
|
|
479 // Initialization for Objective-C context sensitive keywords recognition.
|
|
|
480 // Referenced in Parser::ParseObjCTypeQualifierList.
|
|
|
481 if (getLangOpts().ObjC) {
|
|
|
482 ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in");
|
|
|
483 ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out");
|
|
|
484 ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout");
|
|
|
485 ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway");
|
|
|
486 ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy");
|
|
|
487 ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref");
|
|
|
488 ObjCTypeQuals[objc_nonnull] = &PP.getIdentifierTable().get("nonnull");
|
|
|
489 ObjCTypeQuals[objc_nullable] = &PP.getIdentifierTable().get("nullable");
|
|
|
490 ObjCTypeQuals[objc_null_unspecified]
|
|
|
491 = &PP.getIdentifierTable().get("null_unspecified");
|
|
|
492 }
|
|
|
493
|
|
|
494 Ident_instancetype = nullptr;
|
|
|
495 Ident_final = nullptr;
|
|
|
496 Ident_sealed = nullptr;
|
|
207
|
497 Ident_abstract = nullptr;
|
|
150
|
498 Ident_override = nullptr;
|
|
|
499 Ident_GNU_final = nullptr;
|
|
|
500 Ident_import = nullptr;
|
|
|
501 Ident_module = nullptr;
|
|
|
502
|
|
|
503 Ident_super = &PP.getIdentifierTable().get("super");
|
|
|
504
|
|
|
505 Ident_vector = nullptr;
|
|
|
506 Ident_bool = nullptr;
|
|
207
|
507 Ident_Bool = nullptr;
|
|
150
|
508 Ident_pixel = nullptr;
|
|
|
509 if (getLangOpts().AltiVec || getLangOpts().ZVector) {
|
|
|
510 Ident_vector = &PP.getIdentifierTable().get("vector");
|
|
|
511 Ident_bool = &PP.getIdentifierTable().get("bool");
|
|
207
|
512 Ident_Bool = &PP.getIdentifierTable().get("_Bool");
|
|
150
|
513 }
|
|
|
514 if (getLangOpts().AltiVec)
|
|
|
515 Ident_pixel = &PP.getIdentifierTable().get("pixel");
|
|
|
516
|
|
|
517 Ident_introduced = nullptr;
|
|
|
518 Ident_deprecated = nullptr;
|
|
|
519 Ident_obsoleted = nullptr;
|
|
|
520 Ident_unavailable = nullptr;
|
|
|
521 Ident_strict = nullptr;
|
|
|
522 Ident_replacement = nullptr;
|
|
|
523
|
|
|
524 Ident_language = Ident_defined_in = Ident_generated_declaration = nullptr;
|
|
|
525
|
|
|
526 Ident__except = nullptr;
|
|
|
527
|
|
|
528 Ident__exception_code = Ident__exception_info = nullptr;
|
|
|
529 Ident__abnormal_termination = Ident___exception_code = nullptr;
|
|
|
530 Ident___exception_info = Ident___abnormal_termination = nullptr;
|
|
|
531 Ident_GetExceptionCode = Ident_GetExceptionInfo = nullptr;
|
|
|
532 Ident_AbnormalTermination = nullptr;
|
|
|
533
|
|
|
534 if(getLangOpts().Borland) {
|
|
|
535 Ident__exception_info = PP.getIdentifierInfo("_exception_info");
|
|
|
536 Ident___exception_info = PP.getIdentifierInfo("__exception_info");
|
|
|
537 Ident_GetExceptionInfo = PP.getIdentifierInfo("GetExceptionInformation");
|
|
|
538 Ident__exception_code = PP.getIdentifierInfo("_exception_code");
|
|
|
539 Ident___exception_code = PP.getIdentifierInfo("__exception_code");
|
|
|
540 Ident_GetExceptionCode = PP.getIdentifierInfo("GetExceptionCode");
|
|
|
541 Ident__abnormal_termination = PP.getIdentifierInfo("_abnormal_termination");
|
|
|
542 Ident___abnormal_termination = PP.getIdentifierInfo("__abnormal_termination");
|
|
|
543 Ident_AbnormalTermination = PP.getIdentifierInfo("AbnormalTermination");
|
|
|
544
|
|
|
545 PP.SetPoisonReason(Ident__exception_code,diag::err_seh___except_block);
|
|
|
546 PP.SetPoisonReason(Ident___exception_code,diag::err_seh___except_block);
|
|
|
547 PP.SetPoisonReason(Ident_GetExceptionCode,diag::err_seh___except_block);
|
|
|
548 PP.SetPoisonReason(Ident__exception_info,diag::err_seh___except_filter);
|
|
|
549 PP.SetPoisonReason(Ident___exception_info,diag::err_seh___except_filter);
|
|
|
550 PP.SetPoisonReason(Ident_GetExceptionInfo,diag::err_seh___except_filter);
|
|
|
551 PP.SetPoisonReason(Ident__abnormal_termination,diag::err_seh___finally_block);
|
|
|
552 PP.SetPoisonReason(Ident___abnormal_termination,diag::err_seh___finally_block);
|
|
|
553 PP.SetPoisonReason(Ident_AbnormalTermination,diag::err_seh___finally_block);
|
|
|
554 }
|
|
|
555
|
|
|
556 if (getLangOpts().CPlusPlusModules) {
|
|
|
557 Ident_import = PP.getIdentifierInfo("import");
|
|
|
558 Ident_module = PP.getIdentifierInfo("module");
|
|
|
559 }
|
|
|
560
|
|
|
561 Actions.Initialize();
|
|
|
562
|
|
|
563 // Prime the lexer look-ahead.
|
|
|
564 ConsumeToken();
|
|
|
565 }
|
|
|
566
|
|
173
|
567 void Parser::DestroyTemplateIds() {
|
|
|
568 for (TemplateIdAnnotation *Id : TemplateIds)
|
|
|
569 Id->Destroy();
|
|
|
570 TemplateIds.clear();
|
|
150
|
571 }
|
|
|
572
|
|
|
573 /// Parse the first top-level declaration in a translation unit.
|
|
|
574 ///
|
|
|
575 /// translation-unit:
|
|
|
576 /// [C] external-declaration
|
|
|
577 /// [C] translation-unit external-declaration
|
|
|
578 /// [C++] top-level-declaration-seq[opt]
|
|
|
579 /// [C++20] global-module-fragment[opt] module-declaration
|
|
|
580 /// top-level-declaration-seq[opt] private-module-fragment[opt]
|
|
|
581 ///
|
|
|
582 /// Note that in C, it is an error if there is no first declaration.
|
|
|
583 bool Parser::ParseFirstTopLevelDecl(DeclGroupPtrTy &Result) {
|
|
|
584 Actions.ActOnStartOfTranslationUnit();
|
|
|
585
|
|
|
586 // C11 6.9p1 says translation units must have at least one top-level
|
|
|
587 // declaration. C++ doesn't have this restriction. We also don't want to
|
|
|
588 // complain if we have a precompiled header, although technically if the PCH
|
|
|
589 // is empty we should still emit the (pedantic) diagnostic.
|
|
207
|
590 // If the main file is a header, we're only pretending it's a TU; don't warn.
|
|
150
|
591 bool NoTopLevelDecls = ParseTopLevelDecl(Result, true);
|
|
|
592 if (NoTopLevelDecls && !Actions.getASTContext().getExternalSource() &&
|
|
207
|
593 !getLangOpts().CPlusPlus && !getLangOpts().IsHeaderFile)
|
|
150
|
594 Diag(diag::ext_empty_translation_unit);
|
|
|
595
|
|
|
596 return NoTopLevelDecls;
|
|
|
597 }
|
|
|
598
|
|
|
599 /// ParseTopLevelDecl - Parse one top-level declaration, return whatever the
|
|
|
600 /// action tells us to. This returns true if the EOF was encountered.
|
|
|
601 ///
|
|
|
602 /// top-level-declaration:
|
|
|
603 /// declaration
|
|
|
604 /// [C++20] module-import-declaration
|
|
|
605 bool Parser::ParseTopLevelDecl(DeclGroupPtrTy &Result, bool IsFirstDecl) {
|
|
173
|
606 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(*this);
|
|
150
|
607
|
|
|
608 // Skip over the EOF token, flagging end of previous input for incremental
|
|
|
609 // processing
|
|
|
610 if (PP.isIncrementalProcessingEnabled() && Tok.is(tok::eof))
|
|
|
611 ConsumeToken();
|
|
|
612
|
|
|
613 Result = nullptr;
|
|
|
614 switch (Tok.getKind()) {
|
|
|
615 case tok::annot_pragma_unused:
|
|
|
616 HandlePragmaUnused();
|
|
|
617 return false;
|
|
|
618
|
|
|
619 case tok::kw_export:
|
|
|
620 switch (NextToken().getKind()) {
|
|
|
621 case tok::kw_module:
|
|
|
622 goto module_decl;
|
|
|
623
|
|
|
624 // Note: no need to handle kw_import here. We only form kw_import under
|
|
|
625 // the Modules TS, and in that case 'export import' is parsed as an
|
|
|
626 // export-declaration containing an import-declaration.
|
|
|
627
|
|
|
628 // Recognize context-sensitive C++20 'export module' and 'export import'
|
|
|
629 // declarations.
|
|
|
630 case tok::identifier: {
|
|
|
631 IdentifierInfo *II = NextToken().getIdentifierInfo();
|
|
|
632 if ((II == Ident_module || II == Ident_import) &&
|
|
|
633 GetLookAheadToken(2).isNot(tok::coloncolon)) {
|
|
|
634 if (II == Ident_module)
|
|
|
635 goto module_decl;
|
|
|
636 else
|
|
|
637 goto import_decl;
|
|
|
638 }
|
|
|
639 break;
|
|
|
640 }
|
|
|
641
|
|
|
642 default:
|
|
|
643 break;
|
|
|
644 }
|
|
|
645 break;
|
|
|
646
|
|
|
647 case tok::kw_module:
|
|
|
648 module_decl:
|
|
|
649 Result = ParseModuleDecl(IsFirstDecl);
|
|
|
650 return false;
|
|
|
651
|
|
|
652 // tok::kw_import is handled by ParseExternalDeclaration. (Under the Modules
|
|
|
653 // TS, an import can occur within an export block.)
|
|
|
654 import_decl: {
|
|
|
655 Decl *ImportDecl = ParseModuleImport(SourceLocation());
|
|
|
656 Result = Actions.ConvertDeclToDeclGroup(ImportDecl);
|
|
|
657 return false;
|
|
|
658 }
|
|
|
659
|
|
|
660 case tok::annot_module_include:
|
|
|
661 Actions.ActOnModuleInclude(Tok.getLocation(),
|
|
|
662 reinterpret_cast<Module *>(
|
|
|
663 Tok.getAnnotationValue()));
|
|
|
664 ConsumeAnnotationToken();
|
|
|
665 return false;
|
|
|
666
|
|
|
667 case tok::annot_module_begin:
|
|
|
668 Actions.ActOnModuleBegin(Tok.getLocation(), reinterpret_cast<Module *>(
|
|
|
669 Tok.getAnnotationValue()));
|
|
|
670 ConsumeAnnotationToken();
|
|
|
671 return false;
|
|
|
672
|
|
|
673 case tok::annot_module_end:
|
|
|
674 Actions.ActOnModuleEnd(Tok.getLocation(), reinterpret_cast<Module *>(
|
|
|
675 Tok.getAnnotationValue()));
|
|
|
676 ConsumeAnnotationToken();
|
|
|
677 return false;
|
|
|
678
|
|
|
679 case tok::eof:
|
|
|
680 // Check whether -fmax-tokens= was reached.
|
|
|
681 if (PP.getMaxTokens() != 0 && PP.getTokenCount() > PP.getMaxTokens()) {
|
|
|
682 PP.Diag(Tok.getLocation(), diag::warn_max_tokens_total)
|
|
|
683 << PP.getTokenCount() << PP.getMaxTokens();
|
|
|
684 SourceLocation OverrideLoc = PP.getMaxTokensOverrideLoc();
|
|
|
685 if (OverrideLoc.isValid()) {
|
|
|
686 PP.Diag(OverrideLoc, diag::note_max_tokens_total_override);
|
|
|
687 }
|
|
|
688 }
|
|
|
689
|
|
|
690 // Late template parsing can begin.
|
|
207
|
691 Actions.SetLateTemplateParser(LateTemplateParserCallback, nullptr, this);
|
|
150
|
692 if (!PP.isIncrementalProcessingEnabled())
|
|
|
693 Actions.ActOnEndOfTranslationUnit();
|
|
|
694 //else don't tell Sema that we ended parsing: more input might come.
|
|
|
695 return true;
|
|
|
696
|
|
|
697 case tok::identifier:
|
|
|
698 // C++2a [basic.link]p3:
|
|
|
699 // A token sequence beginning with 'export[opt] module' or
|
|
|
700 // 'export[opt] import' and not immediately followed by '::'
|
|
|
701 // is never interpreted as the declaration of a top-level-declaration.
|
|
|
702 if ((Tok.getIdentifierInfo() == Ident_module ||
|
|
|
703 Tok.getIdentifierInfo() == Ident_import) &&
|
|
|
704 NextToken().isNot(tok::coloncolon)) {
|
|
|
705 if (Tok.getIdentifierInfo() == Ident_module)
|
|
|
706 goto module_decl;
|
|
|
707 else
|
|
|
708 goto import_decl;
|
|
|
709 }
|
|
|
710 break;
|
|
|
711
|
|
|
712 default:
|
|
|
713 break;
|
|
|
714 }
|
|
|
715
|
|
|
716 ParsedAttributesWithRange attrs(AttrFactory);
|
|
|
717 MaybeParseCXX11Attributes(attrs);
|
|
|
718
|
|
|
719 Result = ParseExternalDeclaration(attrs);
|
|
|
720 return false;
|
|
|
721 }
|
|
|
722
|
|
|
723 /// ParseExternalDeclaration:
|
|
|
724 ///
|
|
|
725 /// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl]
|
|
|
726 /// function-definition
|
|
|
727 /// declaration
|
|
|
728 /// [GNU] asm-definition
|
|
|
729 /// [GNU] __extension__ external-declaration
|
|
|
730 /// [OBJC] objc-class-definition
|
|
|
731 /// [OBJC] objc-class-declaration
|
|
|
732 /// [OBJC] objc-alias-declaration
|
|
|
733 /// [OBJC] objc-protocol-definition
|
|
|
734 /// [OBJC] objc-method-definition
|
|
|
735 /// [OBJC] @end
|
|
|
736 /// [C++] linkage-specification
|
|
|
737 /// [GNU] asm-definition:
|
|
|
738 /// simple-asm-expr ';'
|
|
|
739 /// [C++11] empty-declaration
|
|
|
740 /// [C++11] attribute-declaration
|
|
|
741 ///
|
|
|
742 /// [C++11] empty-declaration:
|
|
|
743 /// ';'
|
|
|
744 ///
|
|
|
745 /// [C++0x/GNU] 'extern' 'template' declaration
|
|
|
746 ///
|
|
|
747 /// [Modules-TS] module-import-declaration
|
|
|
748 ///
|
|
|
749 Parser::DeclGroupPtrTy
|
|
|
750 Parser::ParseExternalDeclaration(ParsedAttributesWithRange &attrs,
|
|
|
751 ParsingDeclSpec *DS) {
|
|
173
|
752 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(*this);
|
|
150
|
753 ParenBraceBracketBalancer BalancerRAIIObj(*this);
|
|
|
754
|
|
|
755 if (PP.isCodeCompletionReached()) {
|
|
|
756 cutOffParsing();
|
|
|
757 return nullptr;
|
|
|
758 }
|
|
|
759
|
|
|
760 Decl *SingleDecl = nullptr;
|
|
|
761 switch (Tok.getKind()) {
|
|
|
762 case tok::annot_pragma_vis:
|
|
|
763 HandlePragmaVisibility();
|
|
|
764 return nullptr;
|
|
|
765 case tok::annot_pragma_pack:
|
|
|
766 HandlePragmaPack();
|
|
|
767 return nullptr;
|
|
|
768 case tok::annot_pragma_msstruct:
|
|
|
769 HandlePragmaMSStruct();
|
|
|
770 return nullptr;
|
|
|
771 case tok::annot_pragma_align:
|
|
|
772 HandlePragmaAlign();
|
|
|
773 return nullptr;
|
|
|
774 case tok::annot_pragma_weak:
|
|
|
775 HandlePragmaWeak();
|
|
|
776 return nullptr;
|
|
|
777 case tok::annot_pragma_weakalias:
|
|
|
778 HandlePragmaWeakAlias();
|
|
|
779 return nullptr;
|
|
|
780 case tok::annot_pragma_redefine_extname:
|
|
|
781 HandlePragmaRedefineExtname();
|
|
|
782 return nullptr;
|
|
|
783 case tok::annot_pragma_fp_contract:
|
|
|
784 HandlePragmaFPContract();
|
|
|
785 return nullptr;
|
|
|
786 case tok::annot_pragma_fenv_access:
|
|
|
787 HandlePragmaFEnvAccess();
|
|
|
788 return nullptr;
|
|
207
|
789 case tok::annot_pragma_fenv_round:
|
|
|
790 HandlePragmaFEnvRound();
|
|
|
791 return nullptr;
|
|
173
|
792 case tok::annot_pragma_float_control:
|
|
|
793 HandlePragmaFloatControl();
|
|
|
794 return nullptr;
|
|
150
|
795 case tok::annot_pragma_fp:
|
|
|
796 HandlePragmaFP();
|
|
|
797 break;
|
|
|
798 case tok::annot_pragma_opencl_extension:
|
|
|
799 HandlePragmaOpenCLExtension();
|
|
|
800 return nullptr;
|
|
|
801 case tok::annot_pragma_openmp: {
|
|
|
802 AccessSpecifier AS = AS_none;
|
|
|
803 return ParseOpenMPDeclarativeDirectiveWithExtDecl(AS, attrs);
|
|
|
804 }
|
|
|
805 case tok::annot_pragma_ms_pointers_to_members:
|
|
|
806 HandlePragmaMSPointersToMembers();
|
|
|
807 return nullptr;
|
|
|
808 case tok::annot_pragma_ms_vtordisp:
|
|
|
809 HandlePragmaMSVtorDisp();
|
|
|
810 return nullptr;
|
|
|
811 case tok::annot_pragma_ms_pragma:
|
|
|
812 HandlePragmaMSPragma();
|
|
|
813 return nullptr;
|
|
|
814 case tok::annot_pragma_dump:
|
|
|
815 HandlePragmaDump();
|
|
|
816 return nullptr;
|
|
|
817 case tok::annot_pragma_attribute:
|
|
|
818 HandlePragmaAttribute();
|
|
|
819 return nullptr;
|
|
|
820 case tok::semi:
|
|
|
821 // Either a C++11 empty-declaration or attribute-declaration.
|
|
|
822 SingleDecl =
|
|
|
823 Actions.ActOnEmptyDeclaration(getCurScope(), attrs, Tok.getLocation());
|
|
|
824 ConsumeExtraSemi(OutsideFunction);
|
|
|
825 break;
|
|
|
826 case tok::r_brace:
|
|
|
827 Diag(Tok, diag::err_extraneous_closing_brace);
|
|
|
828 ConsumeBrace();
|
|
|
829 return nullptr;
|
|
|
830 case tok::eof:
|
|
|
831 Diag(Tok, diag::err_expected_external_declaration);
|
|
|
832 return nullptr;
|
|
|
833 case tok::kw___extension__: {
|
|
|
834 // __extension__ silences extension warnings in the subexpression.
|
|
|
835 ExtensionRAIIObject O(Diags); // Use RAII to do this.
|
|
|
836 ConsumeToken();
|
|
|
837 return ParseExternalDeclaration(attrs);
|
|
|
838 }
|
|
|
839 case tok::kw_asm: {
|
|
|
840 ProhibitAttributes(attrs);
|
|
|
841
|
|
|
842 SourceLocation StartLoc = Tok.getLocation();
|
|
|
843 SourceLocation EndLoc;
|
|
|
844
|
|
|
845 ExprResult Result(ParseSimpleAsm(/*ForAsmLabel*/ false, &EndLoc));
|
|
|
846
|
|
|
847 // Check if GNU-style InlineAsm is disabled.
|
|
|
848 // Empty asm string is allowed because it will not introduce
|
|
|
849 // any assembly code.
|
|
|
850 if (!(getLangOpts().GNUAsm || Result.isInvalid())) {
|
|
|
851 const auto *SL = cast<StringLiteral>(Result.get());
|
|
|
852 if (!SL->getString().trim().empty())
|
|
|
853 Diag(StartLoc, diag::err_gnu_inline_asm_disabled);
|
|
|
854 }
|
|
|
855
|
|
|
856 ExpectAndConsume(tok::semi, diag::err_expected_after,
|
|
|
857 "top-level asm block");
|
|
|
858
|
|
|
859 if (Result.isInvalid())
|
|
|
860 return nullptr;
|
|
|
861 SingleDecl = Actions.ActOnFileScopeAsmDecl(Result.get(), StartLoc, EndLoc);
|
|
|
862 break;
|
|
|
863 }
|
|
|
864 case tok::at:
|
|
|
865 return ParseObjCAtDirectives(attrs);
|
|
|
866 case tok::minus:
|
|
|
867 case tok::plus:
|
|
|
868 if (!getLangOpts().ObjC) {
|
|
|
869 Diag(Tok, diag::err_expected_external_declaration);
|
|
|
870 ConsumeToken();
|
|
|
871 return nullptr;
|
|
|
872 }
|
|
|
873 SingleDecl = ParseObjCMethodDefinition();
|
|
|
874 break;
|
|
|
875 case tok::code_completion:
|
|
207
|
876 cutOffParsing();
|
|
150
|
877 if (CurParsedObjCImpl) {
|
|
|
878 // Code-complete Objective-C methods even without leading '-'/'+' prefix.
|
|
|
879 Actions.CodeCompleteObjCMethodDecl(getCurScope(),
|
|
|
880 /*IsInstanceMethod=*/None,
|
|
|
881 /*ReturnType=*/nullptr);
|
|
|
882 }
|
|
|
883 Actions.CodeCompleteOrdinaryName(
|
|
|
884 getCurScope(),
|
|
|
885 CurParsedObjCImpl ? Sema::PCC_ObjCImplementation : Sema::PCC_Namespace);
|
|
|
886 return nullptr;
|
|
|
887 case tok::kw_import:
|
|
|
888 SingleDecl = ParseModuleImport(SourceLocation());
|
|
|
889 break;
|
|
|
890 case tok::kw_export:
|
|
|
891 if (getLangOpts().CPlusPlusModules || getLangOpts().ModulesTS) {
|
|
|
892 SingleDecl = ParseExportDeclaration();
|
|
|
893 break;
|
|
|
894 }
|
|
|
895 // This must be 'export template'. Parse it so we can diagnose our lack
|
|
|
896 // of support.
|
|
|
897 LLVM_FALLTHROUGH;
|
|
|
898 case tok::kw_using:
|
|
|
899 case tok::kw_namespace:
|
|
|
900 case tok::kw_typedef:
|
|
|
901 case tok::kw_template:
|
|
|
902 case tok::kw_static_assert:
|
|
|
903 case tok::kw__Static_assert:
|
|
|
904 // A function definition cannot start with any of these keywords.
|
|
|
905 {
|
|
|
906 SourceLocation DeclEnd;
|
|
207
|
907 return ParseDeclaration(DeclaratorContext::File, DeclEnd, attrs);
|
|
150
|
908 }
|
|
|
909
|
|
|
910 case tok::kw_static:
|
|
|
911 // Parse (then ignore) 'static' prior to a template instantiation. This is
|
|
|
912 // a GCC extension that we intentionally do not support.
|
|
|
913 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
|
|
|
914 Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
|
|
|
915 << 0;
|
|
|
916 SourceLocation DeclEnd;
|
|
207
|
917 return ParseDeclaration(DeclaratorContext::File, DeclEnd, attrs);
|
|
150
|
918 }
|
|
|
919 goto dont_know;
|
|
|
920
|
|
|
921 case tok::kw_inline:
|
|
|
922 if (getLangOpts().CPlusPlus) {
|
|
|
923 tok::TokenKind NextKind = NextToken().getKind();
|
|
|
924
|
|
|
925 // Inline namespaces. Allowed as an extension even in C++03.
|
|
|
926 if (NextKind == tok::kw_namespace) {
|
|
|
927 SourceLocation DeclEnd;
|
|
207
|
928 return ParseDeclaration(DeclaratorContext::File, DeclEnd, attrs);
|
|
150
|
929 }
|
|
|
930
|
|
|
931 // Parse (then ignore) 'inline' prior to a template instantiation. This is
|
|
|
932 // a GCC extension that we intentionally do not support.
|
|
|
933 if (NextKind == tok::kw_template) {
|
|
|
934 Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
|
|
|
935 << 1;
|
|
|
936 SourceLocation DeclEnd;
|
|
207
|
937 return ParseDeclaration(DeclaratorContext::File, DeclEnd, attrs);
|
|
150
|
938 }
|
|
|
939 }
|
|
|
940 goto dont_know;
|
|
|
941
|
|
|
942 case tok::kw_extern:
|
|
|
943 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
|
|
|
944 // Extern templates
|
|
|
945 SourceLocation ExternLoc = ConsumeToken();
|
|
|
946 SourceLocation TemplateLoc = ConsumeToken();
|
|
|
947 Diag(ExternLoc, getLangOpts().CPlusPlus11 ?
|
|
|
948 diag::warn_cxx98_compat_extern_template :
|
|
|
949 diag::ext_extern_template) << SourceRange(ExternLoc, TemplateLoc);
|
|
|
950 SourceLocation DeclEnd;
|
|
207
|
951 return Actions.ConvertDeclToDeclGroup(ParseExplicitInstantiation(
|
|
|
952 DeclaratorContext::File, ExternLoc, TemplateLoc, DeclEnd, attrs));
|
|
150
|
953 }
|
|
|
954 goto dont_know;
|
|
|
955
|
|
|
956 case tok::kw___if_exists:
|
|
|
957 case tok::kw___if_not_exists:
|
|
|
958 ParseMicrosoftIfExistsExternalDeclaration();
|
|
|
959 return nullptr;
|
|
|
960
|
|
|
961 case tok::kw_module:
|
|
|
962 Diag(Tok, diag::err_unexpected_module_decl);
|
|
|
963 SkipUntil(tok::semi);
|
|
|
964 return nullptr;
|
|
|
965
|
|
|
966 default:
|
|
|
967 dont_know:
|
|
|
968 if (Tok.isEditorPlaceholder()) {
|
|
|
969 ConsumeToken();
|
|
|
970 return nullptr;
|
|
|
971 }
|
|
|
972 // We can't tell whether this is a function-definition or declaration yet.
|
|
|
973 return ParseDeclarationOrFunctionDefinition(attrs, DS);
|
|
|
974 }
|
|
|
975
|
|
|
976 // This routine returns a DeclGroup, if the thing we parsed only contains a
|
|
|
977 // single decl, convert it now.
|
|
|
978 return Actions.ConvertDeclToDeclGroup(SingleDecl);
|
|
|
979 }
|
|
|
980
|
|
|
981 /// Determine whether the current token, if it occurs after a
|
|
|
982 /// declarator, continues a declaration or declaration list.
|
|
|
983 bool Parser::isDeclarationAfterDeclarator() {
|
|
|
984 // Check for '= delete' or '= default'
|
|
|
985 if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
|
|
|
986 const Token &KW = NextToken();
|
|
|
987 if (KW.is(tok::kw_default) || KW.is(tok::kw_delete))
|
|
|
988 return false;
|
|
|
989 }
|
|
|
990
|
|
|
991 return Tok.is(tok::equal) || // int X()= -> not a function def
|
|
|
992 Tok.is(tok::comma) || // int X(), -> not a function def
|
|
|
993 Tok.is(tok::semi) || // int X(); -> not a function def
|
|
|
994 Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def
|
|
|
995 Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def
|
|
|
996 (getLangOpts().CPlusPlus &&
|
|
|
997 Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++]
|
|
|
998 }
|
|
|
999
|
|
|
1000 /// Determine whether the current token, if it occurs after a
|
|
|
1001 /// declarator, indicates the start of a function definition.
|
|
|
1002 bool Parser::isStartOfFunctionDefinition(const ParsingDeclarator &Declarator) {
|
|
|
1003 assert(Declarator.isFunctionDeclarator() && "Isn't a function declarator");
|
|
|
1004 if (Tok.is(tok::l_brace)) // int X() {}
|
|
|
1005 return true;
|
|
|
1006
|
|
|
1007 // Handle K&R C argument lists: int X(f) int f; {}
|
|
|
1008 if (!getLangOpts().CPlusPlus &&
|
|
|
1009 Declarator.getFunctionTypeInfo().isKNRPrototype())
|
|
|
1010 return isDeclarationSpecifier();
|
|
|
1011
|
|
|
1012 if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
|
|
|
1013 const Token &KW = NextToken();
|
|
|
1014 return KW.is(tok::kw_default) || KW.is(tok::kw_delete);
|
|
|
1015 }
|
|
|
1016
|
|
|
1017 return Tok.is(tok::colon) || // X() : Base() {} (used for ctors)
|
|
|
1018 Tok.is(tok::kw_try); // X() try { ... }
|
|
|
1019 }
|
|
|
1020
|
|
|
1021 /// Parse either a function-definition or a declaration. We can't tell which
|
|
|
1022 /// we have until we read up to the compound-statement in function-definition.
|
|
|
1023 /// TemplateParams, if non-NULL, provides the template parameters when we're
|
|
|
1024 /// parsing a C++ template-declaration.
|
|
|
1025 ///
|
|
|
1026 /// function-definition: [C99 6.9.1]
|
|
|
1027 /// decl-specs declarator declaration-list[opt] compound-statement
|
|
|
1028 /// [C90] function-definition: [C99 6.7.1] - implicit int result
|
|
|
1029 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
|
|
|
1030 ///
|
|
|
1031 /// declaration: [C99 6.7]
|
|
|
1032 /// declaration-specifiers init-declarator-list[opt] ';'
|
|
|
1033 /// [!C99] init-declarator-list ';' [TODO: warn in c99 mode]
|
|
|
1034 /// [OMP] threadprivate-directive
|
|
|
1035 /// [OMP] allocate-directive [TODO]
|
|
|
1036 ///
|
|
|
1037 Parser::DeclGroupPtrTy
|
|
|
1038 Parser::ParseDeclOrFunctionDefInternal(ParsedAttributesWithRange &attrs,
|
|
|
1039 ParsingDeclSpec &DS,
|
|
|
1040 AccessSpecifier AS) {
|
|
|
1041 MaybeParseMicrosoftAttributes(DS.getAttributes());
|
|
|
1042 // Parse the common declaration-specifiers piece.
|
|
|
1043 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS,
|
|
|
1044 DeclSpecContext::DSC_top_level);
|
|
|
1045
|
|
|
1046 // If we had a free-standing type definition with a missing semicolon, we
|
|
|
1047 // may get this far before the problem becomes obvious.
|
|
|
1048 if (DS.hasTagDefinition() && DiagnoseMissingSemiAfterTagDefinition(
|
|
|
1049 DS, AS, DeclSpecContext::DSC_top_level))
|
|
|
1050 return nullptr;
|
|
|
1051
|
|
|
1052 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
|
|
|
1053 // declaration-specifiers init-declarator-list[opt] ';'
|
|
|
1054 if (Tok.is(tok::semi)) {
|
|
|
1055 auto LengthOfTSTToken = [](DeclSpec::TST TKind) {
|
|
|
1056 assert(DeclSpec::isDeclRep(TKind));
|
|
|
1057 switch(TKind) {
|
|
|
1058 case DeclSpec::TST_class:
|
|
|
1059 return 5;
|
|
|
1060 case DeclSpec::TST_struct:
|
|
|
1061 return 6;
|
|
|
1062 case DeclSpec::TST_union:
|
|
|
1063 return 5;
|
|
|
1064 case DeclSpec::TST_enum:
|
|
|
1065 return 4;
|
|
|
1066 case DeclSpec::TST_interface:
|
|
|
1067 return 9;
|
|
|
1068 default:
|
|
|
1069 llvm_unreachable("we only expect to get the length of the class/struct/union/enum");
|
|
|
1070 }
|
|
|
1071
|
|
|
1072 };
|
|
|
1073 // Suggest correct location to fix '[[attrib]] struct' to 'struct [[attrib]]'
|
|
|
1074 SourceLocation CorrectLocationForAttributes =
|
|
|
1075 DeclSpec::isDeclRep(DS.getTypeSpecType())
|
|
|
1076 ? DS.getTypeSpecTypeLoc().getLocWithOffset(
|
|
|
1077 LengthOfTSTToken(DS.getTypeSpecType()))
|
|
|
1078 : SourceLocation();
|
|
|
1079 ProhibitAttributes(attrs, CorrectLocationForAttributes);
|
|
|
1080 ConsumeToken();
|
|
|
1081 RecordDecl *AnonRecord = nullptr;
|
|
|
1082 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
|
|
|
1083 DS, AnonRecord);
|
|
|
1084 DS.complete(TheDecl);
|
|
|
1085 if (AnonRecord) {
|
|
|
1086 Decl* decls[] = {AnonRecord, TheDecl};
|
|
|
1087 return Actions.BuildDeclaratorGroup(decls);
|
|
|
1088 }
|
|
|
1089 return Actions.ConvertDeclToDeclGroup(TheDecl);
|
|
|
1090 }
|
|
|
1091
|
|
|
1092 DS.takeAttributesFrom(attrs);
|
|
|
1093
|
|
|
1094 // ObjC2 allows prefix attributes on class interfaces and protocols.
|
|
|
1095 // FIXME: This still needs better diagnostics. We should only accept
|
|
|
1096 // attributes here, no types, etc.
|
|
|
1097 if (getLangOpts().ObjC && Tok.is(tok::at)) {
|
|
|
1098 SourceLocation AtLoc = ConsumeToken(); // the "@"
|
|
|
1099 if (!Tok.isObjCAtKeyword(tok::objc_interface) &&
|
|
|
1100 !Tok.isObjCAtKeyword(tok::objc_protocol) &&
|
|
|
1101 !Tok.isObjCAtKeyword(tok::objc_implementation)) {
|
|
|
1102 Diag(Tok, diag::err_objc_unexpected_attr);
|
|
|
1103 SkipUntil(tok::semi);
|
|
|
1104 return nullptr;
|
|
|
1105 }
|
|
|
1106
|
|
|
1107 DS.abort();
|
|
|
1108
|
|
|
1109 const char *PrevSpec = nullptr;
|
|
|
1110 unsigned DiagID;
|
|
|
1111 if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec, DiagID,
|
|
|
1112 Actions.getASTContext().getPrintingPolicy()))
|
|
|
1113 Diag(AtLoc, DiagID) << PrevSpec;
|
|
|
1114
|
|
|
1115 if (Tok.isObjCAtKeyword(tok::objc_protocol))
|
|
|
1116 return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes());
|
|
|
1117
|
|
|
1118 if (Tok.isObjCAtKeyword(tok::objc_implementation))
|
|
|
1119 return ParseObjCAtImplementationDeclaration(AtLoc, DS.getAttributes());
|
|
|
1120
|
|
|
1121 return Actions.ConvertDeclToDeclGroup(
|
|
|
1122 ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()));
|
|
|
1123 }
|
|
|
1124
|
|
|
1125 // If the declspec consisted only of 'extern' and we have a string
|
|
|
1126 // literal following it, this must be a C++ linkage specifier like
|
|
|
1127 // 'extern "C"'.
|
|
|
1128 if (getLangOpts().CPlusPlus && isTokenStringLiteral() &&
|
|
|
1129 DS.getStorageClassSpec() == DeclSpec::SCS_extern &&
|
|
|
1130 DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) {
|
|
207
|
1131 Decl *TheDecl = ParseLinkage(DS, DeclaratorContext::File);
|
|
150
|
1132 return Actions.ConvertDeclToDeclGroup(TheDecl);
|
|
|
1133 }
|
|
|
1134
|
|
207
|
1135 return ParseDeclGroup(DS, DeclaratorContext::File);
|
|
150
|
1136 }
|
|
|
1137
|
|
|
1138 Parser::DeclGroupPtrTy
|
|
|
1139 Parser::ParseDeclarationOrFunctionDefinition(ParsedAttributesWithRange &attrs,
|
|
|
1140 ParsingDeclSpec *DS,
|
|
|
1141 AccessSpecifier AS) {
|
|
|
1142 if (DS) {
|
|
|
1143 return ParseDeclOrFunctionDefInternal(attrs, *DS, AS);
|
|
|
1144 } else {
|
|
|
1145 ParsingDeclSpec PDS(*this);
|
|
|
1146 // Must temporarily exit the objective-c container scope for
|
|
|
1147 // parsing c constructs and re-enter objc container scope
|
|
|
1148 // afterwards.
|
|
|
1149 ObjCDeclContextSwitch ObjCDC(*this);
|
|
|
1150
|
|
|
1151 return ParseDeclOrFunctionDefInternal(attrs, PDS, AS);
|
|
|
1152 }
|
|
|
1153 }
|
|
|
1154
|
|
|
1155 /// ParseFunctionDefinition - We parsed and verified that the specified
|
|
|
1156 /// Declarator is well formed. If this is a K&R-style function, read the
|
|
|
1157 /// parameters declaration-list, then start the compound-statement.
|
|
|
1158 ///
|
|
|
1159 /// function-definition: [C99 6.9.1]
|
|
|
1160 /// decl-specs declarator declaration-list[opt] compound-statement
|
|
|
1161 /// [C90] function-definition: [C99 6.7.1] - implicit int result
|
|
|
1162 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
|
|
|
1163 /// [C++] function-definition: [C++ 8.4]
|
|
|
1164 /// decl-specifier-seq[opt] declarator ctor-initializer[opt]
|
|
|
1165 /// function-body
|
|
|
1166 /// [C++] function-definition: [C++ 8.4]
|
|
|
1167 /// decl-specifier-seq[opt] declarator function-try-block
|
|
|
1168 ///
|
|
|
1169 Decl *Parser::ParseFunctionDefinition(ParsingDeclarator &D,
|
|
|
1170 const ParsedTemplateInfo &TemplateInfo,
|
|
|
1171 LateParsedAttrList *LateParsedAttrs) {
|
|
|
1172 // Poison SEH identifiers so they are flagged as illegal in function bodies.
|
|
|
1173 PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true);
|
|
|
1174 const DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
|
|
|
1175 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
|
|
|
1176
|
|
|
1177 // If this is C90 and the declspecs were completely missing, fudge in an
|
|
|
1178 // implicit int. We do this here because this is the only place where
|
|
|
1179 // declaration-specifiers are completely optional in the grammar.
|
|
|
1180 if (getLangOpts().ImplicitInt && D.getDeclSpec().isEmpty()) {
|
|
|
1181 const char *PrevSpec;
|
|
|
1182 unsigned DiagID;
|
|
|
1183 const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
|
|
|
1184 D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int,
|
|
|
1185 D.getIdentifierLoc(),
|
|
|
1186 PrevSpec, DiagID,
|
|
|
1187 Policy);
|
|
|
1188 D.SetRangeBegin(D.getDeclSpec().getSourceRange().getBegin());
|
|
|
1189 }
|
|
|
1190
|
|
|
1191 // If this declaration was formed with a K&R-style identifier list for the
|
|
|
1192 // arguments, parse declarations for all of the args next.
|
|
|
1193 // int foo(a,b) int a; float b; {}
|
|
|
1194 if (FTI.isKNRPrototype())
|
|
|
1195 ParseKNRParamDeclarations(D);
|
|
|
1196
|
|
|
1197 // We should have either an opening brace or, in a C++ constructor,
|
|
|
1198 // we may have a colon.
|
|
|
1199 if (Tok.isNot(tok::l_brace) &&
|
|
|
1200 (!getLangOpts().CPlusPlus ||
|
|
|
1201 (Tok.isNot(tok::colon) && Tok.isNot(tok::kw_try) &&
|
|
|
1202 Tok.isNot(tok::equal)))) {
|
|
|
1203 Diag(Tok, diag::err_expected_fn_body);
|
|
|
1204
|
|
|
1205 // Skip over garbage, until we get to '{'. Don't eat the '{'.
|
|
|
1206 SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
|
|
|
1207
|
|
|
1208 // If we didn't find the '{', bail out.
|
|
|
1209 if (Tok.isNot(tok::l_brace))
|
|
|
1210 return nullptr;
|
|
|
1211 }
|
|
|
1212
|
|
|
1213 // Check to make sure that any normal attributes are allowed to be on
|
|
|
1214 // a definition. Late parsed attributes are checked at the end.
|
|
|
1215 if (Tok.isNot(tok::equal)) {
|
|
|
1216 for (const ParsedAttr &AL : D.getAttributes())
|
|
|
1217 if (AL.isKnownToGCC() && !AL.isCXX11Attribute())
|
|
|
1218 Diag(AL.getLoc(), diag::warn_attribute_on_function_definition) << AL;
|
|
|
1219 }
|
|
|
1220
|
|
|
1221 // In delayed template parsing mode, for function template we consume the
|
|
|
1222 // tokens and store them for late parsing at the end of the translation unit.
|
|
|
1223 if (getLangOpts().DelayedTemplateParsing && Tok.isNot(tok::equal) &&
|
|
|
1224 TemplateInfo.Kind == ParsedTemplateInfo::Template &&
|
|
|
1225 Actions.canDelayFunctionBody(D)) {
|
|
|
1226 MultiTemplateParamsArg TemplateParameterLists(*TemplateInfo.TemplateParams);
|
|
|
1227
|
|
|
1228 ParseScope BodyScope(this, Scope::FnScope | Scope::DeclScope |
|
|
|
1229 Scope::CompoundStmtScope);
|
|
|
1230 Scope *ParentScope = getCurScope()->getParent();
|
|
|
1231
|
|
207
|
1232 D.setFunctionDefinitionKind(FunctionDefinitionKind::Definition);
|
|
150
|
1233 Decl *DP = Actions.HandleDeclarator(ParentScope, D,
|
|
|
1234 TemplateParameterLists);
|
|
|
1235 D.complete(DP);
|
|
|
1236 D.getMutableDeclSpec().abort();
|
|
|
1237
|
|
|
1238 if (SkipFunctionBodies && (!DP || Actions.canSkipFunctionBody(DP)) &&
|
|
|
1239 trySkippingFunctionBody()) {
|
|
|
1240 BodyScope.Exit();
|
|
|
1241 return Actions.ActOnSkippedFunctionBody(DP);
|
|
|
1242 }
|
|
|
1243
|
|
|
1244 CachedTokens Toks;
|
|
|
1245 LexTemplateFunctionForLateParsing(Toks);
|
|
|
1246
|
|
|
1247 if (DP) {
|
|
|
1248 FunctionDecl *FnD = DP->getAsFunction();
|
|
|
1249 Actions.CheckForFunctionRedefinition(FnD);
|
|
|
1250 Actions.MarkAsLateParsedTemplate(FnD, DP, Toks);
|
|
|
1251 }
|
|
|
1252 return DP;
|
|
|
1253 }
|
|
|
1254 else if (CurParsedObjCImpl &&
|
|
|
1255 !TemplateInfo.TemplateParams &&
|
|
|
1256 (Tok.is(tok::l_brace) || Tok.is(tok::kw_try) ||
|
|
|
1257 Tok.is(tok::colon)) &&
|
|
|
1258 Actions.CurContext->isTranslationUnit()) {
|
|
|
1259 ParseScope BodyScope(this, Scope::FnScope | Scope::DeclScope |
|
|
|
1260 Scope::CompoundStmtScope);
|
|
|
1261 Scope *ParentScope = getCurScope()->getParent();
|
|
|
1262
|
|
207
|
1263 D.setFunctionDefinitionKind(FunctionDefinitionKind::Definition);
|
|
150
|
1264 Decl *FuncDecl = Actions.HandleDeclarator(ParentScope, D,
|
|
|
1265 MultiTemplateParamsArg());
|
|
|
1266 D.complete(FuncDecl);
|
|
|
1267 D.getMutableDeclSpec().abort();
|
|
|
1268 if (FuncDecl) {
|
|
|
1269 // Consume the tokens and store them for later parsing.
|
|
|
1270 StashAwayMethodOrFunctionBodyTokens(FuncDecl);
|
|
|
1271 CurParsedObjCImpl->HasCFunction = true;
|
|
|
1272 return FuncDecl;
|
|
|
1273 }
|
|
|
1274 // FIXME: Should we really fall through here?
|
|
|
1275 }
|
|
|
1276
|
|
|
1277 // Enter a scope for the function body.
|
|
|
1278 ParseScope BodyScope(this, Scope::FnScope | Scope::DeclScope |
|
|
|
1279 Scope::CompoundStmtScope);
|
|
|
1280
|
|
|
1281 // Tell the actions module that we have entered a function definition with the
|
|
|
1282 // specified Declarator for the function.
|
|
|
1283 Sema::SkipBodyInfo SkipBody;
|
|
|
1284 Decl *Res = Actions.ActOnStartOfFunctionDef(getCurScope(), D,
|
|
|
1285 TemplateInfo.TemplateParams
|
|
|
1286 ? *TemplateInfo.TemplateParams
|
|
|
1287 : MultiTemplateParamsArg(),
|
|
|
1288 &SkipBody);
|
|
|
1289
|
|
|
1290 if (SkipBody.ShouldSkip) {
|
|
|
1291 SkipFunctionBody();
|
|
|
1292 return Res;
|
|
|
1293 }
|
|
|
1294
|
|
|
1295 // Break out of the ParsingDeclarator context before we parse the body.
|
|
|
1296 D.complete(Res);
|
|
|
1297
|
|
|
1298 // Break out of the ParsingDeclSpec context, too. This const_cast is
|
|
|
1299 // safe because we're always the sole owner.
|
|
|
1300 D.getMutableDeclSpec().abort();
|
|
|
1301
|
|
|
1302 // With abbreviated function templates - we need to explicitly add depth to
|
|
|
1303 // account for the implicit template parameter list induced by the template.
|
|
|
1304 if (auto *Template = dyn_cast_or_null<FunctionTemplateDecl>(Res))
|
|
|
1305 if (Template->isAbbreviated() &&
|
|
|
1306 Template->getTemplateParameters()->getParam(0)->isImplicit())
|
|
|
1307 // First template parameter is implicit - meaning no explicit template
|
|
|
1308 // parameter list was specified.
|
|
|
1309 CurTemplateDepthTracker.addDepth(1);
|
|
|
1310
|
|
|
1311 if (TryConsumeToken(tok::equal)) {
|
|
|
1312 assert(getLangOpts().CPlusPlus && "Only C++ function definitions have '='");
|
|
|
1313
|
|
|
1314 bool Delete = false;
|
|
|
1315 SourceLocation KWLoc;
|
|
|
1316 if (TryConsumeToken(tok::kw_delete, KWLoc)) {
|
|
|
1317 Diag(KWLoc, getLangOpts().CPlusPlus11
|
|
|
1318 ? diag::warn_cxx98_compat_defaulted_deleted_function
|
|
|
1319 : diag::ext_defaulted_deleted_function)
|
|
|
1320 << 1 /* deleted */;
|
|
|
1321 Actions.SetDeclDeleted(Res, KWLoc);
|
|
|
1322 Delete = true;
|
|
|
1323 } else if (TryConsumeToken(tok::kw_default, KWLoc)) {
|
|
|
1324 Diag(KWLoc, getLangOpts().CPlusPlus11
|
|
|
1325 ? diag::warn_cxx98_compat_defaulted_deleted_function
|
|
|
1326 : diag::ext_defaulted_deleted_function)
|
|
|
1327 << 0 /* defaulted */;
|
|
|
1328 Actions.SetDeclDefaulted(Res, KWLoc);
|
|
|
1329 } else {
|
|
|
1330 llvm_unreachable("function definition after = not 'delete' or 'default'");
|
|
|
1331 }
|
|
|
1332
|
|
|
1333 if (Tok.is(tok::comma)) {
|
|
|
1334 Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
|
|
|
1335 << Delete;
|
|
|
1336 SkipUntil(tok::semi);
|
|
|
1337 } else if (ExpectAndConsume(tok::semi, diag::err_expected_after,
|
|
|
1338 Delete ? "delete" : "default")) {
|
|
|
1339 SkipUntil(tok::semi);
|
|
|
1340 }
|
|
|
1341
|
|
|
1342 Stmt *GeneratedBody = Res ? Res->getBody() : nullptr;
|
|
|
1343 Actions.ActOnFinishFunctionBody(Res, GeneratedBody, false);
|
|
|
1344 return Res;
|
|
|
1345 }
|
|
|
1346
|
|
|
1347 if (SkipFunctionBodies && (!Res || Actions.canSkipFunctionBody(Res)) &&
|
|
|
1348 trySkippingFunctionBody()) {
|
|
|
1349 BodyScope.Exit();
|
|
|
1350 Actions.ActOnSkippedFunctionBody(Res);
|
|
|
1351 return Actions.ActOnFinishFunctionBody(Res, nullptr, false);
|
|
|
1352 }
|
|
|
1353
|
|
|
1354 if (Tok.is(tok::kw_try))
|
|
|
1355 return ParseFunctionTryBlock(Res, BodyScope);
|
|
|
1356
|
|
|
1357 // If we have a colon, then we're probably parsing a C++
|
|
|
1358 // ctor-initializer.
|
|
|
1359 if (Tok.is(tok::colon)) {
|
|
|
1360 ParseConstructorInitializer(Res);
|
|
|
1361
|
|
|
1362 // Recover from error.
|
|
|
1363 if (!Tok.is(tok::l_brace)) {
|
|
|
1364 BodyScope.Exit();
|
|
|
1365 Actions.ActOnFinishFunctionBody(Res, nullptr);
|
|
|
1366 return Res;
|
|
|
1367 }
|
|
|
1368 } else
|
|
|
1369 Actions.ActOnDefaultCtorInitializers(Res);
|
|
|
1370
|
|
|
1371 // Late attributes are parsed in the same scope as the function body.
|
|
|
1372 if (LateParsedAttrs)
|
|
|
1373 ParseLexedAttributeList(*LateParsedAttrs, Res, false, true);
|
|
|
1374
|
|
|
1375 return ParseFunctionStatementBody(Res, BodyScope);
|
|
|
1376 }
|
|
|
1377
|
|
|
1378 void Parser::SkipFunctionBody() {
|
|
|
1379 if (Tok.is(tok::equal)) {
|
|
|
1380 SkipUntil(tok::semi);
|
|
|
1381 return;
|
|
|
1382 }
|
|
|
1383
|
|
|
1384 bool IsFunctionTryBlock = Tok.is(tok::kw_try);
|
|
|
1385 if (IsFunctionTryBlock)
|
|
|
1386 ConsumeToken();
|
|
|
1387
|
|
|
1388 CachedTokens Skipped;
|
|
|
1389 if (ConsumeAndStoreFunctionPrologue(Skipped))
|
|
|
1390 SkipMalformedDecl();
|
|
|
1391 else {
|
|
|
1392 SkipUntil(tok::r_brace);
|
|
|
1393 while (IsFunctionTryBlock && Tok.is(tok::kw_catch)) {
|
|
|
1394 SkipUntil(tok::l_brace);
|
|
|
1395 SkipUntil(tok::r_brace);
|
|
|
1396 }
|
|
|
1397 }
|
|
|
1398 }
|
|
|
1399
|
|
|
1400 /// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides
|
|
|
1401 /// types for a function with a K&R-style identifier list for arguments.
|
|
|
1402 void Parser::ParseKNRParamDeclarations(Declarator &D) {
|
|
|
1403 // We know that the top-level of this declarator is a function.
|
|
|
1404 DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
|
|
|
1405
|
|
|
1406 // Enter function-declaration scope, limiting any declarators to the
|
|
|
1407 // function prototype scope, including parameter declarators.
|
|
|
1408 ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
|
|
|
1409 Scope::FunctionDeclarationScope | Scope::DeclScope);
|
|
|
1410
|
|
|
1411 // Read all the argument declarations.
|
|
|
1412 while (isDeclarationSpecifier()) {
|
|
|
1413 SourceLocation DSStart = Tok.getLocation();
|
|
|
1414
|
|
|
1415 // Parse the common declaration-specifiers piece.
|
|
|
1416 DeclSpec DS(AttrFactory);
|
|
|
1417 ParseDeclarationSpecifiers(DS);
|
|
|
1418
|
|
|
1419 // C99 6.9.1p6: 'each declaration in the declaration list shall have at
|
|
|
1420 // least one declarator'.
|
|
|
1421 // NOTE: GCC just makes this an ext-warn. It's not clear what it does with
|
|
|
1422 // the declarations though. It's trivial to ignore them, really hard to do
|
|
|
1423 // anything else with them.
|
|
|
1424 if (TryConsumeToken(tok::semi)) {
|
|
|
1425 Diag(DSStart, diag::err_declaration_does_not_declare_param);
|
|
|
1426 continue;
|
|
|
1427 }
|
|
|
1428
|
|
|
1429 // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other
|
|
|
1430 // than register.
|
|
|
1431 if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified &&
|
|
|
1432 DS.getStorageClassSpec() != DeclSpec::SCS_register) {
|
|
|
1433 Diag(DS.getStorageClassSpecLoc(),
|
|
|
1434 diag::err_invalid_storage_class_in_func_decl);
|
|
|
1435 DS.ClearStorageClassSpecs();
|
|
|
1436 }
|
|
|
1437 if (DS.getThreadStorageClassSpec() != DeclSpec::TSCS_unspecified) {
|
|
|
1438 Diag(DS.getThreadStorageClassSpecLoc(),
|
|
|
1439 diag::err_invalid_storage_class_in_func_decl);
|
|
|
1440 DS.ClearStorageClassSpecs();
|
|
|
1441 }
|
|
|
1442
|
|
|
1443 // Parse the first declarator attached to this declspec.
|
|
207
|
1444 Declarator ParmDeclarator(DS, DeclaratorContext::KNRTypeList);
|
|
150
|
1445 ParseDeclarator(ParmDeclarator);
|
|
|
1446
|
|
|
1447 // Handle the full declarator list.
|
|
|
1448 while (1) {
|
|
|
1449 // If attributes are present, parse them.
|
|
|
1450 MaybeParseGNUAttributes(ParmDeclarator);
|
|
|
1451
|
|
|
1452 // Ask the actions module to compute the type for this declarator.
|
|
|
1453 Decl *Param =
|
|
|
1454 Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
|
|
|
1455
|
|
|
1456 if (Param &&
|
|
|
1457 // A missing identifier has already been diagnosed.
|
|
|
1458 ParmDeclarator.getIdentifier()) {
|
|
|
1459
|
|
|
1460 // Scan the argument list looking for the correct param to apply this
|
|
|
1461 // type.
|
|
|
1462 for (unsigned i = 0; ; ++i) {
|
|
|
1463 // C99 6.9.1p6: those declarators shall declare only identifiers from
|
|
|
1464 // the identifier list.
|
|
|
1465 if (i == FTI.NumParams) {
|
|
|
1466 Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param)
|
|
|
1467 << ParmDeclarator.getIdentifier();
|
|
|
1468 break;
|
|
|
1469 }
|
|
|
1470
|
|
|
1471 if (FTI.Params[i].Ident == ParmDeclarator.getIdentifier()) {
|
|
|
1472 // Reject redefinitions of parameters.
|
|
|
1473 if (FTI.Params[i].Param) {
|
|
|
1474 Diag(ParmDeclarator.getIdentifierLoc(),
|
|
|
1475 diag::err_param_redefinition)
|
|
|
1476 << ParmDeclarator.getIdentifier();
|
|
|
1477 } else {
|
|
|
1478 FTI.Params[i].Param = Param;
|
|
|
1479 }
|
|
|
1480 break;
|
|
|
1481 }
|
|
|
1482 }
|
|
|
1483 }
|
|
|
1484
|
|
|
1485 // If we don't have a comma, it is either the end of the list (a ';') or
|
|
|
1486 // an error, bail out.
|
|
|
1487 if (Tok.isNot(tok::comma))
|
|
|
1488 break;
|
|
|
1489
|
|
|
1490 ParmDeclarator.clear();
|
|
|
1491
|
|
|
1492 // Consume the comma.
|
|
|
1493 ParmDeclarator.setCommaLoc(ConsumeToken());
|
|
|
1494
|
|
|
1495 // Parse the next declarator.
|
|
|
1496 ParseDeclarator(ParmDeclarator);
|
|
|
1497 }
|
|
|
1498
|
|
|
1499 // Consume ';' and continue parsing.
|
|
|
1500 if (!ExpectAndConsumeSemi(diag::err_expected_semi_declaration))
|
|
|
1501 continue;
|
|
|
1502
|
|
|
1503 // Otherwise recover by skipping to next semi or mandatory function body.
|
|
|
1504 if (SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch))
|
|
|
1505 break;
|
|
|
1506 TryConsumeToken(tok::semi);
|
|
|
1507 }
|
|
|
1508
|
|
|
1509 // The actions module must verify that all arguments were declared.
|
|
|
1510 Actions.ActOnFinishKNRParamDeclarations(getCurScope(), D, Tok.getLocation());
|
|
|
1511 }
|
|
|
1512
|
|
|
1513
|
|
|
1514 /// ParseAsmStringLiteral - This is just a normal string-literal, but is not
|
|
|
1515 /// allowed to be a wide string, and is not subject to character translation.
|
|
|
1516 /// Unlike GCC, we also diagnose an empty string literal when parsing for an
|
|
|
1517 /// asm label as opposed to an asm statement, because such a construct does not
|
|
|
1518 /// behave well.
|
|
|
1519 ///
|
|
|
1520 /// [GNU] asm-string-literal:
|
|
|
1521 /// string-literal
|
|
|
1522 ///
|
|
|
1523 ExprResult Parser::ParseAsmStringLiteral(bool ForAsmLabel) {
|
|
|
1524 if (!isTokenStringLiteral()) {
|
|
|
1525 Diag(Tok, diag::err_expected_string_literal)
|
|
|
1526 << /*Source='in...'*/0 << "'asm'";
|
|
|
1527 return ExprError();
|
|
|
1528 }
|
|
|
1529
|
|
|
1530 ExprResult AsmString(ParseStringLiteralExpression());
|
|
|
1531 if (!AsmString.isInvalid()) {
|
|
|
1532 const auto *SL = cast<StringLiteral>(AsmString.get());
|
|
|
1533 if (!SL->isAscii()) {
|
|
|
1534 Diag(Tok, diag::err_asm_operand_wide_string_literal)
|
|
|
1535 << SL->isWide()
|
|
|
1536 << SL->getSourceRange();
|
|
|
1537 return ExprError();
|
|
|
1538 }
|
|
|
1539 if (ForAsmLabel && SL->getString().empty()) {
|
|
|
1540 Diag(Tok, diag::err_asm_operand_wide_string_literal)
|
|
|
1541 << 2 /* an empty */ << SL->getSourceRange();
|
|
|
1542 return ExprError();
|
|
|
1543 }
|
|
|
1544 }
|
|
|
1545 return AsmString;
|
|
|
1546 }
|
|
|
1547
|
|
|
1548 /// ParseSimpleAsm
|
|
|
1549 ///
|
|
|
1550 /// [GNU] simple-asm-expr:
|
|
|
1551 /// 'asm' '(' asm-string-literal ')'
|
|
|
1552 ///
|
|
|
1553 ExprResult Parser::ParseSimpleAsm(bool ForAsmLabel, SourceLocation *EndLoc) {
|
|
|
1554 assert(Tok.is(tok::kw_asm) && "Not an asm!");
|
|
|
1555 SourceLocation Loc = ConsumeToken();
|
|
|
1556
|
|
173
|
1557 if (isGNUAsmQualifier(Tok)) {
|
|
|
1558 // Remove from the end of 'asm' to the end of the asm qualifier.
|
|
150
|
1559 SourceRange RemovalRange(PP.getLocForEndOfToken(Loc),
|
|
|
1560 PP.getLocForEndOfToken(Tok.getLocation()));
|
|
173
|
1561 Diag(Tok, diag::err_global_asm_qualifier_ignored)
|
|
|
1562 << GNUAsmQualifiers::getQualifierName(getGNUAsmQualifier(Tok))
|
|
|
1563 << FixItHint::CreateRemoval(RemovalRange);
|
|
150
|
1564 ConsumeToken();
|
|
|
1565 }
|
|
|
1566
|
|
|
1567 BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
|
1568 if (T.consumeOpen()) {
|
|
|
1569 Diag(Tok, diag::err_expected_lparen_after) << "asm";
|
|
|
1570 return ExprError();
|
|
|
1571 }
|
|
|
1572
|
|
|
1573 ExprResult Result(ParseAsmStringLiteral(ForAsmLabel));
|
|
|
1574
|
|
|
1575 if (!Result.isInvalid()) {
|
|
|
1576 // Close the paren and get the location of the end bracket
|
|
|
1577 T.consumeClose();
|
|
|
1578 if (EndLoc)
|
|
|
1579 *EndLoc = T.getCloseLocation();
|
|
|
1580 } else if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch)) {
|
|
|
1581 if (EndLoc)
|
|
|
1582 *EndLoc = Tok.getLocation();
|
|
|
1583 ConsumeParen();
|
|
|
1584 }
|
|
|
1585
|
|
|
1586 return Result;
|
|
|
1587 }
|
|
|
1588
|
|
|
1589 /// Get the TemplateIdAnnotation from the token and put it in the
|
|
|
1590 /// cleanup pool so that it gets destroyed when parsing the current top level
|
|
|
1591 /// declaration is finished.
|
|
|
1592 TemplateIdAnnotation *Parser::takeTemplateIdAnnotation(const Token &tok) {
|
|
|
1593 assert(tok.is(tok::annot_template_id) && "Expected template-id token");
|
|
|
1594 TemplateIdAnnotation *
|
|
|
1595 Id = static_cast<TemplateIdAnnotation *>(tok.getAnnotationValue());
|
|
|
1596 return Id;
|
|
|
1597 }
|
|
|
1598
|
|
|
1599 void Parser::AnnotateScopeToken(CXXScopeSpec &SS, bool IsNewAnnotation) {
|
|
|
1600 // Push the current token back into the token stream (or revert it if it is
|
|
|
1601 // cached) and use an annotation scope token for current token.
|
|
|
1602 if (PP.isBacktrackEnabled())
|
|
|
1603 PP.RevertCachedTokens(1);
|
|
|
1604 else
|
|
|
1605 PP.EnterToken(Tok, /*IsReinject=*/true);
|
|
|
1606 Tok.setKind(tok::annot_cxxscope);
|
|
|
1607 Tok.setAnnotationValue(Actions.SaveNestedNameSpecifierAnnotation(SS));
|
|
|
1608 Tok.setAnnotationRange(SS.getRange());
|
|
|
1609
|
|
|
1610 // In case the tokens were cached, have Preprocessor replace them
|
|
|
1611 // with the annotation token. We don't need to do this if we've
|
|
|
1612 // just reverted back to a prior state.
|
|
|
1613 if (IsNewAnnotation)
|
|
|
1614 PP.AnnotateCachedTokens(Tok);
|
|
|
1615 }
|
|
|
1616
|
|
|
1617 /// Attempt to classify the name at the current token position. This may
|
|
|
1618 /// form a type, scope or primary expression annotation, or replace the token
|
|
|
1619 /// with a typo-corrected keyword. This is only appropriate when the current
|
|
|
1620 /// name must refer to an entity which has already been declared.
|
|
|
1621 ///
|
|
|
1622 /// \param CCC Indicates how to perform typo-correction for this name. If NULL,
|
|
|
1623 /// no typo correction will be performed.
|
|
|
1624 Parser::AnnotatedNameKind
|
|
|
1625 Parser::TryAnnotateName(CorrectionCandidateCallback *CCC) {
|
|
|
1626 assert(Tok.is(tok::identifier) || Tok.is(tok::annot_cxxscope));
|
|
|
1627
|
|
|
1628 const bool EnteringContext = false;
|
|
|
1629 const bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
|
|
|
1630
|
|
|
1631 CXXScopeSpec SS;
|
|
|
1632 if (getLangOpts().CPlusPlus &&
|
|
173
|
1633 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
|
|
|
1634 /*ObjectHadErrors=*/false,
|
|
|
1635 EnteringContext))
|
|
150
|
1636 return ANK_Error;
|
|
|
1637
|
|
|
1638 if (Tok.isNot(tok::identifier) || SS.isInvalid()) {
|
|
|
1639 if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(SS, !WasScopeAnnotation))
|
|
|
1640 return ANK_Error;
|
|
|
1641 return ANK_Unresolved;
|
|
|
1642 }
|
|
|
1643
|
|
|
1644 IdentifierInfo *Name = Tok.getIdentifierInfo();
|
|
|
1645 SourceLocation NameLoc = Tok.getLocation();
|
|
|
1646
|
|
|
1647 // FIXME: Move the tentative declaration logic into ClassifyName so we can
|
|
|
1648 // typo-correct to tentatively-declared identifiers.
|
|
|
1649 if (isTentativelyDeclared(Name)) {
|
|
|
1650 // Identifier has been tentatively declared, and thus cannot be resolved as
|
|
|
1651 // an expression. Fall back to annotating it as a type.
|
|
|
1652 if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(SS, !WasScopeAnnotation))
|
|
|
1653 return ANK_Error;
|
|
|
1654 return Tok.is(tok::annot_typename) ? ANK_Success : ANK_TentativeDecl;
|
|
|
1655 }
|
|
|
1656
|
|
|
1657 Token Next = NextToken();
|
|
|
1658
|
|
|
1659 // Look up and classify the identifier. We don't perform any typo-correction
|
|
|
1660 // after a scope specifier, because in general we can't recover from typos
|
|
|
1661 // there (eg, after correcting 'A::template B<X>::C' [sic], we would need to
|
|
|
1662 // jump back into scope specifier parsing).
|
|
|
1663 Sema::NameClassification Classification = Actions.ClassifyName(
|
|
|
1664 getCurScope(), SS, Name, NameLoc, Next, SS.isEmpty() ? CCC : nullptr);
|
|
|
1665
|
|
|
1666 // If name lookup found nothing and we guessed that this was a template name,
|
|
|
1667 // double-check before committing to that interpretation. C++20 requires that
|
|
|
1668 // we interpret this as a template-id if it can be, but if it can't be, then
|
|
|
1669 // this is an error recovery case.
|
|
|
1670 if (Classification.getKind() == Sema::NC_UndeclaredTemplate &&
|
|
|
1671 isTemplateArgumentList(1) == TPResult::False) {
|
|
|
1672 // It's not a template-id; re-classify without the '<' as a hint.
|
|
|
1673 Token FakeNext = Next;
|
|
|
1674 FakeNext.setKind(tok::unknown);
|
|
|
1675 Classification =
|
|
|
1676 Actions.ClassifyName(getCurScope(), SS, Name, NameLoc, FakeNext,
|
|
|
1677 SS.isEmpty() ? CCC : nullptr);
|
|
|
1678 }
|
|
|
1679
|
|
|
1680 switch (Classification.getKind()) {
|
|
|
1681 case Sema::NC_Error:
|
|
|
1682 return ANK_Error;
|
|
|
1683
|
|
|
1684 case Sema::NC_Keyword:
|
|
|
1685 // The identifier was typo-corrected to a keyword.
|
|
|
1686 Tok.setIdentifierInfo(Name);
|
|
|
1687 Tok.setKind(Name->getTokenID());
|
|
|
1688 PP.TypoCorrectToken(Tok);
|
|
|
1689 if (SS.isNotEmpty())
|
|
|
1690 AnnotateScopeToken(SS, !WasScopeAnnotation);
|
|
|
1691 // We've "annotated" this as a keyword.
|
|
|
1692 return ANK_Success;
|
|
|
1693
|
|
|
1694 case Sema::NC_Unknown:
|
|
|
1695 // It's not something we know about. Leave it unannotated.
|
|
|
1696 break;
|
|
|
1697
|
|
|
1698 case Sema::NC_Type: {
|
|
207
|
1699 if (TryAltiVecVectorToken())
|
|
|
1700 // vector has been found as a type id when altivec is enabled but
|
|
|
1701 // this is followed by a declaration specifier so this is really the
|
|
|
1702 // altivec vector token. Leave it unannotated.
|
|
|
1703 break;
|
|
150
|
1704 SourceLocation BeginLoc = NameLoc;
|
|
|
1705 if (SS.isNotEmpty())
|
|
|
1706 BeginLoc = SS.getBeginLoc();
|
|
|
1707
|
|
|
1708 /// An Objective-C object type followed by '<' is a specialization of
|
|
|
1709 /// a parameterized class type or a protocol-qualified type.
|
|
|
1710 ParsedType Ty = Classification.getType();
|
|
|
1711 if (getLangOpts().ObjC && NextToken().is(tok::less) &&
|
|
|
1712 (Ty.get()->isObjCObjectType() ||
|
|
|
1713 Ty.get()->isObjCObjectPointerType())) {
|
|
|
1714 // Consume the name.
|
|
|
1715 SourceLocation IdentifierLoc = ConsumeToken();
|
|
|
1716 SourceLocation NewEndLoc;
|
|
|
1717 TypeResult NewType
|
|
|
1718 = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
|
|
|
1719 /*consumeLastToken=*/false,
|
|
|
1720 NewEndLoc);
|
|
|
1721 if (NewType.isUsable())
|
|
|
1722 Ty = NewType.get();
|
|
|
1723 else if (Tok.is(tok::eof)) // Nothing to do here, bail out...
|
|
|
1724 return ANK_Error;
|
|
|
1725 }
|
|
|
1726
|
|
|
1727 Tok.setKind(tok::annot_typename);
|
|
|
1728 setTypeAnnotation(Tok, Ty);
|
|
|
1729 Tok.setAnnotationEndLoc(Tok.getLocation());
|
|
|
1730 Tok.setLocation(BeginLoc);
|
|
|
1731 PP.AnnotateCachedTokens(Tok);
|
|
|
1732 return ANK_Success;
|
|
|
1733 }
|
|
|
1734
|
|
207
|
1735 case Sema::NC_OverloadSet:
|
|
|
1736 Tok.setKind(tok::annot_overload_set);
|
|
150
|
1737 setExprAnnotation(Tok, Classification.getExpression());
|
|
|
1738 Tok.setAnnotationEndLoc(NameLoc);
|
|
|
1739 if (SS.isNotEmpty())
|
|
|
1740 Tok.setLocation(SS.getBeginLoc());
|
|
|
1741 PP.AnnotateCachedTokens(Tok);
|
|
|
1742 return ANK_Success;
|
|
|
1743
|
|
|
1744 case Sema::NC_NonType:
|
|
207
|
1745 if (TryAltiVecVectorToken())
|
|
|
1746 // vector has been found as a non-type id when altivec is enabled but
|
|
|
1747 // this is followed by a declaration specifier so this is really the
|
|
|
1748 // altivec vector token. Leave it unannotated.
|
|
|
1749 break;
|
|
150
|
1750 Tok.setKind(tok::annot_non_type);
|
|
|
1751 setNonTypeAnnotation(Tok, Classification.getNonTypeDecl());
|
|
|
1752 Tok.setLocation(NameLoc);
|
|
|
1753 Tok.setAnnotationEndLoc(NameLoc);
|
|
|
1754 PP.AnnotateCachedTokens(Tok);
|
|
|
1755 if (SS.isNotEmpty())
|
|
|
1756 AnnotateScopeToken(SS, !WasScopeAnnotation);
|
|
|
1757 return ANK_Success;
|
|
|
1758
|
|
|
1759 case Sema::NC_UndeclaredNonType:
|
|
|
1760 case Sema::NC_DependentNonType:
|
|
|
1761 Tok.setKind(Classification.getKind() == Sema::NC_UndeclaredNonType
|
|
|
1762 ? tok::annot_non_type_undeclared
|
|
|
1763 : tok::annot_non_type_dependent);
|
|
|
1764 setIdentifierAnnotation(Tok, Name);
|
|
|
1765 Tok.setLocation(NameLoc);
|
|
|
1766 Tok.setAnnotationEndLoc(NameLoc);
|
|
|
1767 PP.AnnotateCachedTokens(Tok);
|
|
|
1768 if (SS.isNotEmpty())
|
|
|
1769 AnnotateScopeToken(SS, !WasScopeAnnotation);
|
|
|
1770 return ANK_Success;
|
|
|
1771
|
|
|
1772 case Sema::NC_TypeTemplate:
|
|
|
1773 if (Next.isNot(tok::less)) {
|
|
|
1774 // This may be a type template being used as a template template argument.
|
|
|
1775 if (SS.isNotEmpty())
|
|
|
1776 AnnotateScopeToken(SS, !WasScopeAnnotation);
|
|
|
1777 return ANK_TemplateName;
|
|
|
1778 }
|
|
|
1779 LLVM_FALLTHROUGH;
|
|
|
1780 case Sema::NC_VarTemplate:
|
|
|
1781 case Sema::NC_FunctionTemplate:
|
|
|
1782 case Sema::NC_UndeclaredTemplate: {
|
|
|
1783 // We have a type, variable or function template followed by '<'.
|
|
|
1784 ConsumeToken();
|
|
|
1785 UnqualifiedId Id;
|
|
|
1786 Id.setIdentifier(Name, NameLoc);
|
|
|
1787 if (AnnotateTemplateIdToken(
|
|
|
1788 TemplateTy::make(Classification.getTemplateName()),
|
|
|
1789 Classification.getTemplateNameKind(), SS, SourceLocation(), Id))
|
|
|
1790 return ANK_Error;
|
|
|
1791 return ANK_Success;
|
|
|
1792 }
|
|
|
1793 case Sema::NC_Concept: {
|
|
|
1794 UnqualifiedId Id;
|
|
|
1795 Id.setIdentifier(Name, NameLoc);
|
|
|
1796 if (Next.is(tok::less))
|
|
|
1797 // We have a concept name followed by '<'. Consume the identifier token so
|
|
|
1798 // we reach the '<' and annotate it.
|
|
|
1799 ConsumeToken();
|
|
|
1800 if (AnnotateTemplateIdToken(
|
|
|
1801 TemplateTy::make(Classification.getTemplateName()),
|
|
|
1802 Classification.getTemplateNameKind(), SS, SourceLocation(), Id,
|
|
|
1803 /*AllowTypeAnnotation=*/false, /*TypeConstraint=*/true))
|
|
|
1804 return ANK_Error;
|
|
|
1805 return ANK_Success;
|
|
|
1806 }
|
|
|
1807 }
|
|
|
1808
|
|
|
1809 // Unable to classify the name, but maybe we can annotate a scope specifier.
|
|
|
1810 if (SS.isNotEmpty())
|
|
|
1811 AnnotateScopeToken(SS, !WasScopeAnnotation);
|
|
|
1812 return ANK_Unresolved;
|
|
|
1813 }
|
|
|
1814
|
|
|
1815 bool Parser::TryKeywordIdentFallback(bool DisableKeyword) {
|
|
|
1816 assert(Tok.isNot(tok::identifier));
|
|
|
1817 Diag(Tok, diag::ext_keyword_as_ident)
|
|
|
1818 << PP.getSpelling(Tok)
|
|
|
1819 << DisableKeyword;
|
|
|
1820 if (DisableKeyword)
|
|
|
1821 Tok.getIdentifierInfo()->revertTokenIDToIdentifier();
|
|
|
1822 Tok.setKind(tok::identifier);
|
|
|
1823 return true;
|
|
|
1824 }
|
|
|
1825
|
|
|
1826 /// TryAnnotateTypeOrScopeToken - If the current token position is on a
|
|
|
1827 /// typename (possibly qualified in C++) or a C++ scope specifier not followed
|
|
|
1828 /// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens
|
|
|
1829 /// with a single annotation token representing the typename or C++ scope
|
|
|
1830 /// respectively.
|
|
|
1831 /// This simplifies handling of C++ scope specifiers and allows efficient
|
|
|
1832 /// backtracking without the need to re-parse and resolve nested-names and
|
|
|
1833 /// typenames.
|
|
|
1834 /// It will mainly be called when we expect to treat identifiers as typenames
|
|
|
1835 /// (if they are typenames). For example, in C we do not expect identifiers
|
|
|
1836 /// inside expressions to be treated as typenames so it will not be called
|
|
|
1837 /// for expressions in C.
|
|
|
1838 /// The benefit for C/ObjC is that a typename will be annotated and
|
|
|
1839 /// Actions.getTypeName will not be needed to be called again (e.g. getTypeName
|
|
|
1840 /// will not be called twice, once to check whether we have a declaration
|
|
|
1841 /// specifier, and another one to get the actual type inside
|
|
|
1842 /// ParseDeclarationSpecifiers).
|
|
|
1843 ///
|
|
|
1844 /// This returns true if an error occurred.
|
|
|
1845 ///
|
|
|
1846 /// Note that this routine emits an error if you call it with ::new or ::delete
|
|
|
1847 /// as the current tokens, so only call it in contexts where these are invalid.
|
|
|
1848 bool Parser::TryAnnotateTypeOrScopeToken() {
|
|
|
1849 assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
|
|
|
1850 Tok.is(tok::kw_typename) || Tok.is(tok::annot_cxxscope) ||
|
|
|
1851 Tok.is(tok::kw_decltype) || Tok.is(tok::annot_template_id) ||
|
|
|
1852 Tok.is(tok::kw___super)) &&
|
|
|
1853 "Cannot be a type or scope token!");
|
|
|
1854
|
|
|
1855 if (Tok.is(tok::kw_typename)) {
|
|
|
1856 // MSVC lets you do stuff like:
|
|
|
1857 // typename typedef T_::D D;
|
|
|
1858 //
|
|
|
1859 // We will consume the typedef token here and put it back after we have
|
|
|
1860 // parsed the first identifier, transforming it into something more like:
|
|
|
1861 // typename T_::D typedef D;
|
|
|
1862 if (getLangOpts().MSVCCompat && NextToken().is(tok::kw_typedef)) {
|
|
|
1863 Token TypedefToken;
|
|
|
1864 PP.Lex(TypedefToken);
|
|
|
1865 bool Result = TryAnnotateTypeOrScopeToken();
|
|
|
1866 PP.EnterToken(Tok, /*IsReinject=*/true);
|
|
|
1867 Tok = TypedefToken;
|
|
|
1868 if (!Result)
|
|
|
1869 Diag(Tok.getLocation(), diag::warn_expected_qualified_after_typename);
|
|
|
1870 return Result;
|
|
|
1871 }
|
|
|
1872
|
|
|
1873 // Parse a C++ typename-specifier, e.g., "typename T::type".
|
|
|
1874 //
|
|
|
1875 // typename-specifier:
|
|
|
1876 // 'typename' '::' [opt] nested-name-specifier identifier
|
|
|
1877 // 'typename' '::' [opt] nested-name-specifier template [opt]
|
|
|
1878 // simple-template-id
|
|
|
1879 SourceLocation TypenameLoc = ConsumeToken();
|
|
|
1880 CXXScopeSpec SS;
|
|
|
1881 if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
|
|
173
|
1882 /*ObjectHadErrors=*/false,
|
|
150
|
1883 /*EnteringContext=*/false, nullptr,
|
|
|
1884 /*IsTypename*/ true))
|
|
|
1885 return true;
|
|
|
1886 if (SS.isEmpty()) {
|
|
|
1887 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id) ||
|
|
|
1888 Tok.is(tok::annot_decltype)) {
|
|
|
1889 // Attempt to recover by skipping the invalid 'typename'
|
|
|
1890 if (Tok.is(tok::annot_decltype) ||
|
|
|
1891 (!TryAnnotateTypeOrScopeToken() && Tok.isAnnotation())) {
|
|
|
1892 unsigned DiagID = diag::err_expected_qualified_after_typename;
|
|
|
1893 // MS compatibility: MSVC permits using known types with typename.
|
|
|
1894 // e.g. "typedef typename T* pointer_type"
|
|
|
1895 if (getLangOpts().MicrosoftExt)
|
|
|
1896 DiagID = diag::warn_expected_qualified_after_typename;
|
|
|
1897 Diag(Tok.getLocation(), DiagID);
|
|
|
1898 return false;
|
|
|
1899 }
|
|
|
1900 }
|
|
|
1901 if (Tok.isEditorPlaceholder())
|
|
|
1902 return true;
|
|
|
1903
|
|
|
1904 Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename);
|
|
|
1905 return true;
|
|
|
1906 }
|
|
|
1907
|
|
|
1908 TypeResult Ty;
|
|
|
1909 if (Tok.is(tok::identifier)) {
|
|
|
1910 // FIXME: check whether the next token is '<', first!
|
|
|
1911 Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
|
|
|
1912 *Tok.getIdentifierInfo(),
|
|
|
1913 Tok.getLocation());
|
|
|
1914 } else if (Tok.is(tok::annot_template_id)) {
|
|
|
1915 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
|
|
173
|
1916 if (!TemplateId->mightBeType()) {
|
|
150
|
1917 Diag(Tok, diag::err_typename_refers_to_non_type_template)
|
|
|
1918 << Tok.getAnnotationRange();
|
|
|
1919 return true;
|
|
|
1920 }
|
|
|
1921
|
|
|
1922 ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
|
|
|
1923 TemplateId->NumArgs);
|
|
|
1924
|
|
173
|
1925 Ty = TemplateId->isInvalid()
|
|
|
1926 ? TypeError()
|
|
|
1927 : Actions.ActOnTypenameType(
|
|
|
1928 getCurScope(), TypenameLoc, SS, TemplateId->TemplateKWLoc,
|
|
|
1929 TemplateId->Template, TemplateId->Name,
|
|
|
1930 TemplateId->TemplateNameLoc, TemplateId->LAngleLoc,
|
|
|
1931 TemplateArgsPtr, TemplateId->RAngleLoc);
|
|
150
|
1932 } else {
|
|
|
1933 Diag(Tok, diag::err_expected_type_name_after_typename)
|
|
|
1934 << SS.getRange();
|
|
|
1935 return true;
|
|
|
1936 }
|
|
|
1937
|
|
|
1938 SourceLocation EndLoc = Tok.getLastLoc();
|
|
|
1939 Tok.setKind(tok::annot_typename);
|
|
173
|
1940 setTypeAnnotation(Tok, Ty);
|
|
150
|
1941 Tok.setAnnotationEndLoc(EndLoc);
|
|
|
1942 Tok.setLocation(TypenameLoc);
|
|
|
1943 PP.AnnotateCachedTokens(Tok);
|
|
|
1944 return false;
|
|
|
1945 }
|
|
|
1946
|
|
|
1947 // Remembers whether the token was originally a scope annotation.
|
|
|
1948 bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
|
|
|
1949
|
|
|
1950 CXXScopeSpec SS;
|
|
|
1951 if (getLangOpts().CPlusPlus)
|
|
173
|
1952 if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
|
|
|
1953 /*ObjectHadErrors=*/false,
|
|
|
1954 /*EnteringContext*/ false))
|
|
150
|
1955 return true;
|
|
|
1956
|
|
|
1957 return TryAnnotateTypeOrScopeTokenAfterScopeSpec(SS, !WasScopeAnnotation);
|
|
|
1958 }
|
|
|
1959
|
|
|
1960 /// Try to annotate a type or scope token, having already parsed an
|
|
|
1961 /// optional scope specifier. \p IsNewScope should be \c true unless the scope
|
|
|
1962 /// specifier was extracted from an existing tok::annot_cxxscope annotation.
|
|
|
1963 bool Parser::TryAnnotateTypeOrScopeTokenAfterScopeSpec(CXXScopeSpec &SS,
|
|
|
1964 bool IsNewScope) {
|
|
|
1965 if (Tok.is(tok::identifier)) {
|
|
|
1966 // Determine whether the identifier is a type name.
|
|
|
1967 if (ParsedType Ty = Actions.getTypeName(
|
|
|
1968 *Tok.getIdentifierInfo(), Tok.getLocation(), getCurScope(), &SS,
|
|
|
1969 false, NextToken().is(tok::period), nullptr,
|
|
|
1970 /*IsCtorOrDtorName=*/false,
|
|
|
1971 /*NonTrivialTypeSourceInfo*/true,
|
|
|
1972 /*IsClassTemplateDeductionContext*/true)) {
|
|
|
1973 SourceLocation BeginLoc = Tok.getLocation();
|
|
|
1974 if (SS.isNotEmpty()) // it was a C++ qualified type name.
|
|
|
1975 BeginLoc = SS.getBeginLoc();
|
|
|
1976
|
|
|
1977 /// An Objective-C object type followed by '<' is a specialization of
|
|
|
1978 /// a parameterized class type or a protocol-qualified type.
|
|
|
1979 if (getLangOpts().ObjC && NextToken().is(tok::less) &&
|
|
|
1980 (Ty.get()->isObjCObjectType() ||
|
|
|
1981 Ty.get()->isObjCObjectPointerType())) {
|
|
|
1982 // Consume the name.
|
|
|
1983 SourceLocation IdentifierLoc = ConsumeToken();
|
|
|
1984 SourceLocation NewEndLoc;
|
|
|
1985 TypeResult NewType
|
|
|
1986 = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
|
|
|
1987 /*consumeLastToken=*/false,
|
|
|
1988 NewEndLoc);
|
|
|
1989 if (NewType.isUsable())
|
|
|
1990 Ty = NewType.get();
|
|
|
1991 else if (Tok.is(tok::eof)) // Nothing to do here, bail out...
|
|
|
1992 return false;
|
|
|
1993 }
|
|
|
1994
|
|
|
1995 // This is a typename. Replace the current token in-place with an
|
|
|
1996 // annotation type token.
|
|
|
1997 Tok.setKind(tok::annot_typename);
|
|
|
1998 setTypeAnnotation(Tok, Ty);
|
|
|
1999 Tok.setAnnotationEndLoc(Tok.getLocation());
|
|
|
2000 Tok.setLocation(BeginLoc);
|
|
|
2001
|
|
|
2002 // In case the tokens were cached, have Preprocessor replace
|
|
|
2003 // them with the annotation token.
|
|
|
2004 PP.AnnotateCachedTokens(Tok);
|
|
|
2005 return false;
|
|
|
2006 }
|
|
|
2007
|
|
|
2008 if (!getLangOpts().CPlusPlus) {
|
|
|
2009 // If we're in C, we can't have :: tokens at all (the lexer won't return
|
|
|
2010 // them). If the identifier is not a type, then it can't be scope either,
|
|
|
2011 // just early exit.
|
|
|
2012 return false;
|
|
|
2013 }
|
|
|
2014
|
|
|
2015 // If this is a template-id, annotate with a template-id or type token.
|
|
|
2016 // FIXME: This appears to be dead code. We already have formed template-id
|
|
|
2017 // tokens when parsing the scope specifier; this can never form a new one.
|
|
|
2018 if (NextToken().is(tok::less)) {
|
|
|
2019 TemplateTy Template;
|
|
|
2020 UnqualifiedId TemplateName;
|
|
|
2021 TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
|
|
|
2022 bool MemberOfUnknownSpecialization;
|
|
|
2023 if (TemplateNameKind TNK = Actions.isTemplateName(
|
|
|
2024 getCurScope(), SS,
|
|
|
2025 /*hasTemplateKeyword=*/false, TemplateName,
|
|
|
2026 /*ObjectType=*/nullptr, /*EnteringContext*/false, Template,
|
|
|
2027 MemberOfUnknownSpecialization)) {
|
|
|
2028 // Only annotate an undeclared template name as a template-id if the
|
|
|
2029 // following tokens have the form of a template argument list.
|
|
|
2030 if (TNK != TNK_Undeclared_template ||
|
|
|
2031 isTemplateArgumentList(1) != TPResult::False) {
|
|
|
2032 // Consume the identifier.
|
|
|
2033 ConsumeToken();
|
|
|
2034 if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(),
|
|
|
2035 TemplateName)) {
|
|
|
2036 // If an unrecoverable error occurred, we need to return true here,
|
|
|
2037 // because the token stream is in a damaged state. We may not
|
|
|
2038 // return a valid identifier.
|
|
|
2039 return true;
|
|
|
2040 }
|
|
|
2041 }
|
|
|
2042 }
|
|
|
2043 }
|
|
|
2044
|
|
|
2045 // The current token, which is either an identifier or a
|
|
|
2046 // template-id, is not part of the annotation. Fall through to
|
|
|
2047 // push that token back into the stream and complete the C++ scope
|
|
|
2048 // specifier annotation.
|
|
|
2049 }
|
|
|
2050
|
|
|
2051 if (Tok.is(tok::annot_template_id)) {
|
|
|
2052 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
|
|
|
2053 if (TemplateId->Kind == TNK_Type_template) {
|
|
|
2054 // A template-id that refers to a type was parsed into a
|
|
|
2055 // template-id annotation in a context where we weren't allowed
|
|
|
2056 // to produce a type annotation token. Update the template-id
|
|
|
2057 // annotation token to a type annotation token now.
|
|
|
2058 AnnotateTemplateIdTokenAsType(SS);
|
|
|
2059 return false;
|
|
|
2060 }
|
|
|
2061 }
|
|
|
2062
|
|
|
2063 if (SS.isEmpty())
|
|
|
2064 return false;
|
|
|
2065
|
|
|
2066 // A C++ scope specifier that isn't followed by a typename.
|
|
|
2067 AnnotateScopeToken(SS, IsNewScope);
|
|
|
2068 return false;
|
|
|
2069 }
|
|
|
2070
|
|
|
2071 /// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only
|
|
|
2072 /// annotates C++ scope specifiers and template-ids. This returns
|
|
|
2073 /// true if there was an error that could not be recovered from.
|
|
|
2074 ///
|
|
|
2075 /// Note that this routine emits an error if you call it with ::new or ::delete
|
|
|
2076 /// as the current tokens, so only call it in contexts where these are invalid.
|
|
|
2077 bool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) {
|
|
|
2078 assert(getLangOpts().CPlusPlus &&
|
|
|
2079 "Call sites of this function should be guarded by checking for C++");
|
|
|
2080 assert(MightBeCXXScopeToken() && "Cannot be a type or scope token!");
|
|
|
2081
|
|
|
2082 CXXScopeSpec SS;
|
|
173
|
2083 if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
|
|
|
2084 /*ObjectHadErrors=*/false,
|
|
|
2085 EnteringContext))
|
|
150
|
2086 return true;
|
|
|
2087 if (SS.isEmpty())
|
|
|
2088 return false;
|
|
|
2089
|
|
|
2090 AnnotateScopeToken(SS, true);
|
|
|
2091 return false;
|
|
|
2092 }
|
|
|
2093
|
|
|
2094 bool Parser::isTokenEqualOrEqualTypo() {
|
|
|
2095 tok::TokenKind Kind = Tok.getKind();
|
|
|
2096 switch (Kind) {
|
|
|
2097 default:
|
|
|
2098 return false;
|
|
|
2099 case tok::ampequal: // &=
|
|
|
2100 case tok::starequal: // *=
|
|
|
2101 case tok::plusequal: // +=
|
|
|
2102 case tok::minusequal: // -=
|
|
|
2103 case tok::exclaimequal: // !=
|
|
|
2104 case tok::slashequal: // /=
|
|
|
2105 case tok::percentequal: // %=
|
|
|
2106 case tok::lessequal: // <=
|
|
|
2107 case tok::lesslessequal: // <<=
|
|
|
2108 case tok::greaterequal: // >=
|
|
|
2109 case tok::greatergreaterequal: // >>=
|
|
|
2110 case tok::caretequal: // ^=
|
|
|
2111 case tok::pipeequal: // |=
|
|
|
2112 case tok::equalequal: // ==
|
|
|
2113 Diag(Tok, diag::err_invalid_token_after_declarator_suggest_equal)
|
|
|
2114 << Kind
|
|
|
2115 << FixItHint::CreateReplacement(SourceRange(Tok.getLocation()), "=");
|
|
|
2116 LLVM_FALLTHROUGH;
|
|
|
2117 case tok::equal:
|
|
|
2118 return true;
|
|
|
2119 }
|
|
|
2120 }
|
|
|
2121
|
|
|
2122 SourceLocation Parser::handleUnexpectedCodeCompletionToken() {
|
|
|
2123 assert(Tok.is(tok::code_completion));
|
|
|
2124 PrevTokLocation = Tok.getLocation();
|
|
|
2125
|
|
|
2126 for (Scope *S = getCurScope(); S; S = S->getParent()) {
|
|
|
2127 if (S->getFlags() & Scope::FnScope) {
|
|
207
|
2128 cutOffParsing();
|
|
150
|
2129 Actions.CodeCompleteOrdinaryName(getCurScope(),
|
|
|
2130 Sema::PCC_RecoveryInFunction);
|
|
|
2131 return PrevTokLocation;
|
|
|
2132 }
|
|
|
2133
|
|
|
2134 if (S->getFlags() & Scope::ClassScope) {
|
|
207
|
2135 cutOffParsing();
|
|
150
|
2136 Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Class);
|
|
|
2137 return PrevTokLocation;
|
|
|
2138 }
|
|
|
2139 }
|
|
|
2140
|
|
207
|
2141 cutOffParsing();
|
|
150
|
2142 Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Namespace);
|
|
|
2143 return PrevTokLocation;
|
|
|
2144 }
|
|
|
2145
|
|
|
2146 // Code-completion pass-through functions
|
|
|
2147
|
|
|
2148 void Parser::CodeCompleteDirective(bool InConditional) {
|
|
|
2149 Actions.CodeCompletePreprocessorDirective(InConditional);
|
|
|
2150 }
|
|
|
2151
|
|
|
2152 void Parser::CodeCompleteInConditionalExclusion() {
|
|
|
2153 Actions.CodeCompleteInPreprocessorConditionalExclusion(getCurScope());
|
|
|
2154 }
|
|
|
2155
|
|
|
2156 void Parser::CodeCompleteMacroName(bool IsDefinition) {
|
|
|
2157 Actions.CodeCompletePreprocessorMacroName(IsDefinition);
|
|
|
2158 }
|
|
|
2159
|
|
|
2160 void Parser::CodeCompletePreprocessorExpression() {
|
|
|
2161 Actions.CodeCompletePreprocessorExpression();
|
|
|
2162 }
|
|
|
2163
|
|
|
2164 void Parser::CodeCompleteMacroArgument(IdentifierInfo *Macro,
|
|
|
2165 MacroInfo *MacroInfo,
|
|
|
2166 unsigned ArgumentIndex) {
|
|
|
2167 Actions.CodeCompletePreprocessorMacroArgument(getCurScope(), Macro, MacroInfo,
|
|
|
2168 ArgumentIndex);
|
|
|
2169 }
|
|
|
2170
|
|
|
2171 void Parser::CodeCompleteIncludedFile(llvm::StringRef Dir, bool IsAngled) {
|
|
|
2172 Actions.CodeCompleteIncludedFile(Dir, IsAngled);
|
|
|
2173 }
|
|
|
2174
|
|
|
2175 void Parser::CodeCompleteNaturalLanguage() {
|
|
|
2176 Actions.CodeCompleteNaturalLanguage();
|
|
|
2177 }
|
|
|
2178
|
|
|
2179 bool Parser::ParseMicrosoftIfExistsCondition(IfExistsCondition& Result) {
|
|
|
2180 assert((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists)) &&
|
|
|
2181 "Expected '__if_exists' or '__if_not_exists'");
|
|
|
2182 Result.IsIfExists = Tok.is(tok::kw___if_exists);
|
|
|
2183 Result.KeywordLoc = ConsumeToken();
|
|
|
2184
|
|
|
2185 BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
|
2186 if (T.consumeOpen()) {
|
|
|
2187 Diag(Tok, diag::err_expected_lparen_after)
|
|
|
2188 << (Result.IsIfExists? "__if_exists" : "__if_not_exists");
|
|
|
2189 return true;
|
|
|
2190 }
|
|
|
2191
|
|
|
2192 // Parse nested-name-specifier.
|
|
|
2193 if (getLangOpts().CPlusPlus)
|
|
173
|
2194 ParseOptionalCXXScopeSpecifier(Result.SS, /*ObjectType=*/nullptr,
|
|
|
2195 /*ObjectHadErrors=*/false,
|
|
150
|
2196 /*EnteringContext=*/false);
|
|
|
2197
|
|
|
2198 // Check nested-name specifier.
|
|
|
2199 if (Result.SS.isInvalid()) {
|
|
|
2200 T.skipToEnd();
|
|
|
2201 return true;
|
|
|
2202 }
|
|
|
2203
|
|
|
2204 // Parse the unqualified-id.
|
|
|
2205 SourceLocation TemplateKWLoc; // FIXME: parsed, but unused.
|
|
173
|
2206 if (ParseUnqualifiedId(Result.SS, /*ObjectType=*/nullptr,
|
|
|
2207 /*ObjectHadErrors=*/false, /*EnteringContext*/ false,
|
|
|
2208 /*AllowDestructorName*/ true,
|
|
|
2209 /*AllowConstructorName*/ true,
|
|
|
2210 /*AllowDeductionGuide*/ false, &TemplateKWLoc,
|
|
|
2211 Result.Name)) {
|
|
150
|
2212 T.skipToEnd();
|
|
|
2213 return true;
|
|
|
2214 }
|
|
|
2215
|
|
|
2216 if (T.consumeClose())
|
|
|
2217 return true;
|
|
|
2218
|
|
|
2219 // Check if the symbol exists.
|
|
|
2220 switch (Actions.CheckMicrosoftIfExistsSymbol(getCurScope(), Result.KeywordLoc,
|
|
|
2221 Result.IsIfExists, Result.SS,
|
|
|
2222 Result.Name)) {
|
|
|
2223 case Sema::IER_Exists:
|
|
|
2224 Result.Behavior = Result.IsIfExists ? IEB_Parse : IEB_Skip;
|
|
|
2225 break;
|
|
|
2226
|
|
|
2227 case Sema::IER_DoesNotExist:
|
|
|
2228 Result.Behavior = !Result.IsIfExists ? IEB_Parse : IEB_Skip;
|
|
|
2229 break;
|
|
|
2230
|
|
|
2231 case Sema::IER_Dependent:
|
|
|
2232 Result.Behavior = IEB_Dependent;
|
|
|
2233 break;
|
|
|
2234
|
|
|
2235 case Sema::IER_Error:
|
|
|
2236 return true;
|
|
|
2237 }
|
|
|
2238
|
|
|
2239 return false;
|
|
|
2240 }
|
|
|
2241
|
|
|
2242 void Parser::ParseMicrosoftIfExistsExternalDeclaration() {
|
|
|
2243 IfExistsCondition Result;
|
|
|
2244 if (ParseMicrosoftIfExistsCondition(Result))
|
|
|
2245 return;
|
|
|
2246
|
|
|
2247 BalancedDelimiterTracker Braces(*this, tok::l_brace);
|
|
|
2248 if (Braces.consumeOpen()) {
|
|
|
2249 Diag(Tok, diag::err_expected) << tok::l_brace;
|
|
|
2250 return;
|
|
|
2251 }
|
|
|
2252
|
|
|
2253 switch (Result.Behavior) {
|
|
|
2254 case IEB_Parse:
|
|
|
2255 // Parse declarations below.
|
|
|
2256 break;
|
|
|
2257
|
|
|
2258 case IEB_Dependent:
|
|
|
2259 llvm_unreachable("Cannot have a dependent external declaration");
|
|
|
2260
|
|
|
2261 case IEB_Skip:
|
|
|
2262 Braces.skipToEnd();
|
|
|
2263 return;
|
|
|
2264 }
|
|
|
2265
|
|
|
2266 // Parse the declarations.
|
|
|
2267 // FIXME: Support module import within __if_exists?
|
|
|
2268 while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
|
|
|
2269 ParsedAttributesWithRange attrs(AttrFactory);
|
|
|
2270 MaybeParseCXX11Attributes(attrs);
|
|
|
2271 DeclGroupPtrTy Result = ParseExternalDeclaration(attrs);
|
|
|
2272 if (Result && !getCurScope()->getParent())
|
|
|
2273 Actions.getASTConsumer().HandleTopLevelDecl(Result.get());
|
|
|
2274 }
|
|
|
2275 Braces.consumeClose();
|
|
|
2276 }
|
|
|
2277
|
|
|
2278 /// Parse a declaration beginning with the 'module' keyword or C++20
|
|
|
2279 /// context-sensitive keyword (optionally preceded by 'export').
|
|
|
2280 ///
|
|
|
2281 /// module-declaration: [Modules TS + P0629R0]
|
|
|
2282 /// 'export'[opt] 'module' module-name attribute-specifier-seq[opt] ';'
|
|
|
2283 ///
|
|
|
2284 /// global-module-fragment: [C++2a]
|
|
|
2285 /// 'module' ';' top-level-declaration-seq[opt]
|
|
|
2286 /// module-declaration: [C++2a]
|
|
|
2287 /// 'export'[opt] 'module' module-name module-partition[opt]
|
|
|
2288 /// attribute-specifier-seq[opt] ';'
|
|
|
2289 /// private-module-fragment: [C++2a]
|
|
|
2290 /// 'module' ':' 'private' ';' top-level-declaration-seq[opt]
|
|
|
2291 Parser::DeclGroupPtrTy Parser::ParseModuleDecl(bool IsFirstDecl) {
|
|
|
2292 SourceLocation StartLoc = Tok.getLocation();
|
|
|
2293
|
|
|
2294 Sema::ModuleDeclKind MDK = TryConsumeToken(tok::kw_export)
|
|
|
2295 ? Sema::ModuleDeclKind::Interface
|
|
|
2296 : Sema::ModuleDeclKind::Implementation;
|
|
|
2297
|
|
|
2298 assert(
|
|
|
2299 (Tok.is(tok::kw_module) ||
|
|
|
2300 (Tok.is(tok::identifier) && Tok.getIdentifierInfo() == Ident_module)) &&
|
|
|
2301 "not a module declaration");
|
|
|
2302 SourceLocation ModuleLoc = ConsumeToken();
|
|
|
2303
|
|
|
2304 // Attributes appear after the module name, not before.
|
|
|
2305 // FIXME: Suggest moving the attributes later with a fixit.
|
|
|
2306 DiagnoseAndSkipCXX11Attributes();
|
|
|
2307
|
|
|
2308 // Parse a global-module-fragment, if present.
|
|
|
2309 if (getLangOpts().CPlusPlusModules && Tok.is(tok::semi)) {
|
|
|
2310 SourceLocation SemiLoc = ConsumeToken();
|
|
|
2311 if (!IsFirstDecl) {
|
|
|
2312 Diag(StartLoc, diag::err_global_module_introducer_not_at_start)
|
|
|
2313 << SourceRange(StartLoc, SemiLoc);
|
|
|
2314 return nullptr;
|
|
|
2315 }
|
|
|
2316 if (MDK == Sema::ModuleDeclKind::Interface) {
|
|
|
2317 Diag(StartLoc, diag::err_module_fragment_exported)
|
|
|
2318 << /*global*/0 << FixItHint::CreateRemoval(StartLoc);
|
|
|
2319 }
|
|
|
2320 return Actions.ActOnGlobalModuleFragmentDecl(ModuleLoc);
|
|
|
2321 }
|
|
|
2322
|
|
|
2323 // Parse a private-module-fragment, if present.
|
|
|
2324 if (getLangOpts().CPlusPlusModules && Tok.is(tok::colon) &&
|
|
|
2325 NextToken().is(tok::kw_private)) {
|
|
|
2326 if (MDK == Sema::ModuleDeclKind::Interface) {
|
|
|
2327 Diag(StartLoc, diag::err_module_fragment_exported)
|
|
|
2328 << /*private*/1 << FixItHint::CreateRemoval(StartLoc);
|
|
|
2329 }
|
|
|
2330 ConsumeToken();
|
|
|
2331 SourceLocation PrivateLoc = ConsumeToken();
|
|
|
2332 DiagnoseAndSkipCXX11Attributes();
|
|
|
2333 ExpectAndConsumeSemi(diag::err_private_module_fragment_expected_semi);
|
|
|
2334 return Actions.ActOnPrivateModuleFragmentDecl(ModuleLoc, PrivateLoc);
|
|
|
2335 }
|
|
|
2336
|
|
|
2337 SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> Path;
|
|
|
2338 if (ParseModuleName(ModuleLoc, Path, /*IsImport*/false))
|
|
|
2339 return nullptr;
|
|
|
2340
|
|
|
2341 // Parse the optional module-partition.
|
|
|
2342 if (Tok.is(tok::colon)) {
|
|
|
2343 SourceLocation ColonLoc = ConsumeToken();
|
|
|
2344 SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> Partition;
|
|
|
2345 if (ParseModuleName(ModuleLoc, Partition, /*IsImport*/false))
|
|
|
2346 return nullptr;
|
|
|
2347
|
|
|
2348 // FIXME: Support module partition declarations.
|
|
|
2349 Diag(ColonLoc, diag::err_unsupported_module_partition)
|
|
|
2350 << SourceRange(ColonLoc, Partition.back().second);
|
|
|
2351 // Recover by parsing as a non-partition.
|
|
|
2352 }
|
|
|
2353
|
|
|
2354 // We don't support any module attributes yet; just parse them and diagnose.
|
|
|
2355 ParsedAttributesWithRange Attrs(AttrFactory);
|
|
|
2356 MaybeParseCXX11Attributes(Attrs);
|
|
|
2357 ProhibitCXX11Attributes(Attrs, diag::err_attribute_not_module_attr);
|
|
|
2358
|
|
|
2359 ExpectAndConsumeSemi(diag::err_module_expected_semi);
|
|
|
2360
|
|
|
2361 return Actions.ActOnModuleDecl(StartLoc, ModuleLoc, MDK, Path, IsFirstDecl);
|
|
|
2362 }
|
|
|
2363
|
|
|
2364 /// Parse a module import declaration. This is essentially the same for
|
|
|
2365 /// Objective-C and the C++ Modules TS, except for the leading '@' (in ObjC)
|
|
|
2366 /// and the trailing optional attributes (in C++).
|
|
|
2367 ///
|
|
|
2368 /// [ObjC] @import declaration:
|
|
|
2369 /// '@' 'import' module-name ';'
|
|
|
2370 /// [ModTS] module-import-declaration:
|
|
|
2371 /// 'import' module-name attribute-specifier-seq[opt] ';'
|
|
|
2372 /// [C++2a] module-import-declaration:
|
|
|
2373 /// 'export'[opt] 'import' module-name
|
|
|
2374 /// attribute-specifier-seq[opt] ';'
|
|
|
2375 /// 'export'[opt] 'import' module-partition
|
|
|
2376 /// attribute-specifier-seq[opt] ';'
|
|
|
2377 /// 'export'[opt] 'import' header-name
|
|
|
2378 /// attribute-specifier-seq[opt] ';'
|
|
|
2379 Decl *Parser::ParseModuleImport(SourceLocation AtLoc) {
|
|
|
2380 SourceLocation StartLoc = AtLoc.isInvalid() ? Tok.getLocation() : AtLoc;
|
|
|
2381
|
|
|
2382 SourceLocation ExportLoc;
|
|
|
2383 TryConsumeToken(tok::kw_export, ExportLoc);
|
|
|
2384
|
|
|
2385 assert((AtLoc.isInvalid() ? Tok.isOneOf(tok::kw_import, tok::identifier)
|
|
|
2386 : Tok.isObjCAtKeyword(tok::objc_import)) &&
|
|
|
2387 "Improper start to module import");
|
|
|
2388 bool IsObjCAtImport = Tok.isObjCAtKeyword(tok::objc_import);
|
|
|
2389 SourceLocation ImportLoc = ConsumeToken();
|
|
|
2390
|
|
|
2391 SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> Path;
|
|
|
2392 Module *HeaderUnit = nullptr;
|
|
|
2393
|
|
|
2394 if (Tok.is(tok::header_name)) {
|
|
|
2395 // This is a header import that the preprocessor decided we should skip
|
|
|
2396 // because it was malformed in some way. Parse and ignore it; it's already
|
|
|
2397 // been diagnosed.
|
|
|
2398 ConsumeToken();
|
|
|
2399 } else if (Tok.is(tok::annot_header_unit)) {
|
|
|
2400 // This is a header import that the preprocessor mapped to a module import.
|
|
|
2401 HeaderUnit = reinterpret_cast<Module *>(Tok.getAnnotationValue());
|
|
|
2402 ConsumeAnnotationToken();
|
|
|
2403 } else if (getLangOpts().CPlusPlusModules && Tok.is(tok::colon)) {
|
|
|
2404 SourceLocation ColonLoc = ConsumeToken();
|
|
|
2405 if (ParseModuleName(ImportLoc, Path, /*IsImport*/true))
|
|
|
2406 return nullptr;
|
|
|
2407
|
|
|
2408 // FIXME: Support module partition import.
|
|
|
2409 Diag(ColonLoc, diag::err_unsupported_module_partition)
|
|
|
2410 << SourceRange(ColonLoc, Path.back().second);
|
|
|
2411 return nullptr;
|
|
|
2412 } else {
|
|
|
2413 if (ParseModuleName(ImportLoc, Path, /*IsImport*/true))
|
|
|
2414 return nullptr;
|
|
|
2415 }
|
|
|
2416
|
|
|
2417 ParsedAttributesWithRange Attrs(AttrFactory);
|
|
|
2418 MaybeParseCXX11Attributes(Attrs);
|
|
|
2419 // We don't support any module import attributes yet.
|
|
|
2420 ProhibitCXX11Attributes(Attrs, diag::err_attribute_not_import_attr);
|
|
|
2421
|
|
|
2422 if (PP.hadModuleLoaderFatalFailure()) {
|
|
|
2423 // With a fatal failure in the module loader, we abort parsing.
|
|
|
2424 cutOffParsing();
|
|
|
2425 return nullptr;
|
|
|
2426 }
|
|
|
2427
|
|
|
2428 DeclResult Import;
|
|
|
2429 if (HeaderUnit)
|
|
|
2430 Import =
|
|
|
2431 Actions.ActOnModuleImport(StartLoc, ExportLoc, ImportLoc, HeaderUnit);
|
|
|
2432 else if (!Path.empty())
|
|
|
2433 Import = Actions.ActOnModuleImport(StartLoc, ExportLoc, ImportLoc, Path);
|
|
|
2434 ExpectAndConsumeSemi(diag::err_module_expected_semi);
|
|
|
2435 if (Import.isInvalid())
|
|
|
2436 return nullptr;
|
|
|
2437
|
|
|
2438 // Using '@import' in framework headers requires modules to be enabled so that
|
|
|
2439 // the header is parseable. Emit a warning to make the user aware.
|
|
|
2440 if (IsObjCAtImport && AtLoc.isValid()) {
|
|
|
2441 auto &SrcMgr = PP.getSourceManager();
|
|
|
2442 auto *FE = SrcMgr.getFileEntryForID(SrcMgr.getFileID(AtLoc));
|
|
|
2443 if (FE && llvm::sys::path::parent_path(FE->getDir()->getName())
|
|
|
2444 .endswith(".framework"))
|
|
|
2445 Diags.Report(AtLoc, diag::warn_atimport_in_framework_header);
|
|
|
2446 }
|
|
|
2447
|
|
|
2448 return Import.get();
|
|
|
2449 }
|
|
|
2450
|
|
|
2451 /// Parse a C++ Modules TS / Objective-C module name (both forms use the same
|
|
|
2452 /// grammar).
|
|
|
2453 ///
|
|
|
2454 /// module-name:
|
|
|
2455 /// module-name-qualifier[opt] identifier
|
|
|
2456 /// module-name-qualifier:
|
|
|
2457 /// module-name-qualifier[opt] identifier '.'
|
|
|
2458 bool Parser::ParseModuleName(
|
|
|
2459 SourceLocation UseLoc,
|
|
|
2460 SmallVectorImpl<std::pair<IdentifierInfo *, SourceLocation>> &Path,
|
|
|
2461 bool IsImport) {
|
|
|
2462 // Parse the module path.
|
|
|
2463 while (true) {
|
|
|
2464 if (!Tok.is(tok::identifier)) {
|
|
|
2465 if (Tok.is(tok::code_completion)) {
|
|
207
|
2466 cutOffParsing();
|
|
150
|
2467 Actions.CodeCompleteModuleImport(UseLoc, Path);
|
|
|
2468 return true;
|
|
|
2469 }
|
|
|
2470
|
|
|
2471 Diag(Tok, diag::err_module_expected_ident) << IsImport;
|
|
|
2472 SkipUntil(tok::semi);
|
|
|
2473 return true;
|
|
|
2474 }
|
|
|
2475
|
|
|
2476 // Record this part of the module path.
|
|
|
2477 Path.push_back(std::make_pair(Tok.getIdentifierInfo(), Tok.getLocation()));
|
|
|
2478 ConsumeToken();
|
|
|
2479
|
|
|
2480 if (Tok.isNot(tok::period))
|
|
|
2481 return false;
|
|
|
2482
|
|
|
2483 ConsumeToken();
|
|
|
2484 }
|
|
|
2485 }
|
|
|
2486
|
|
|
2487 /// Try recover parser when module annotation appears where it must not
|
|
|
2488 /// be found.
|
|
|
2489 /// \returns false if the recover was successful and parsing may be continued, or
|
|
|
2490 /// true if parser must bail out to top level and handle the token there.
|
|
|
2491 bool Parser::parseMisplacedModuleImport() {
|
|
|
2492 while (true) {
|
|
|
2493 switch (Tok.getKind()) {
|
|
|
2494 case tok::annot_module_end:
|
|
|
2495 // If we recovered from a misplaced module begin, we expect to hit a
|
|
|
2496 // misplaced module end too. Stay in the current context when this
|
|
|
2497 // happens.
|
|
|
2498 if (MisplacedModuleBeginCount) {
|
|
|
2499 --MisplacedModuleBeginCount;
|
|
|
2500 Actions.ActOnModuleEnd(Tok.getLocation(),
|
|
|
2501 reinterpret_cast<Module *>(
|
|
|
2502 Tok.getAnnotationValue()));
|
|
|
2503 ConsumeAnnotationToken();
|
|
|
2504 continue;
|
|
|
2505 }
|
|
|
2506 // Inform caller that recovery failed, the error must be handled at upper
|
|
|
2507 // level. This will generate the desired "missing '}' at end of module"
|
|
|
2508 // diagnostics on the way out.
|
|
|
2509 return true;
|
|
|
2510 case tok::annot_module_begin:
|
|
|
2511 // Recover by entering the module (Sema will diagnose).
|
|
|
2512 Actions.ActOnModuleBegin(Tok.getLocation(),
|
|
|
2513 reinterpret_cast<Module *>(
|
|
|
2514 Tok.getAnnotationValue()));
|
|
|
2515 ConsumeAnnotationToken();
|
|
|
2516 ++MisplacedModuleBeginCount;
|
|
|
2517 continue;
|
|
|
2518 case tok::annot_module_include:
|
|
|
2519 // Module import found where it should not be, for instance, inside a
|
|
|
2520 // namespace. Recover by importing the module.
|
|
|
2521 Actions.ActOnModuleInclude(Tok.getLocation(),
|
|
|
2522 reinterpret_cast<Module *>(
|
|
|
2523 Tok.getAnnotationValue()));
|
|
|
2524 ConsumeAnnotationToken();
|
|
|
2525 // If there is another module import, process it.
|
|
|
2526 continue;
|
|
|
2527 default:
|
|
|
2528 return false;
|
|
|
2529 }
|
|
|
2530 }
|
|
|
2531 return false;
|
|
|
2532 }
|
|
|
2533
|
|
|
2534 bool BalancedDelimiterTracker::diagnoseOverflow() {
|
|
|
2535 P.Diag(P.Tok, diag::err_bracket_depth_exceeded)
|
|
|
2536 << P.getLangOpts().BracketDepth;
|
|
|
2537 P.Diag(P.Tok, diag::note_bracket_depth);
|
|
|
2538 P.cutOffParsing();
|
|
|
2539 return true;
|
|
|
2540 }
|
|
|
2541
|
|
|
2542 bool BalancedDelimiterTracker::expectAndConsume(unsigned DiagID,
|
|
|
2543 const char *Msg,
|
|
|
2544 tok::TokenKind SkipToTok) {
|
|
|
2545 LOpen = P.Tok.getLocation();
|
|
|
2546 if (P.ExpectAndConsume(Kind, DiagID, Msg)) {
|
|
|
2547 if (SkipToTok != tok::unknown)
|
|
|
2548 P.SkipUntil(SkipToTok, Parser::StopAtSemi);
|
|
|
2549 return true;
|
|
|
2550 }
|
|
|
2551
|
|
|
2552 if (getDepth() < P.getLangOpts().BracketDepth)
|
|
|
2553 return false;
|
|
|
2554
|
|
|
2555 return diagnoseOverflow();
|
|
|
2556 }
|
|
|
2557
|
|
|
2558 bool BalancedDelimiterTracker::diagnoseMissingClose() {
|
|
|
2559 assert(!P.Tok.is(Close) && "Should have consumed closing delimiter");
|
|
|
2560
|
|
|
2561 if (P.Tok.is(tok::annot_module_end))
|
|
|
2562 P.Diag(P.Tok, diag::err_missing_before_module_end) << Close;
|
|
|
2563 else
|
|
|
2564 P.Diag(P.Tok, diag::err_expected) << Close;
|
|
|
2565 P.Diag(LOpen, diag::note_matching) << Kind;
|
|
|
2566
|
|
|
2567 // If we're not already at some kind of closing bracket, skip to our closing
|
|
|
2568 // token.
|
|
|
2569 if (P.Tok.isNot(tok::r_paren) && P.Tok.isNot(tok::r_brace) &&
|
|
|
2570 P.Tok.isNot(tok::r_square) &&
|
|
|
2571 P.SkipUntil(Close, FinalToken,
|
|
|
2572 Parser::StopAtSemi | Parser::StopBeforeMatch) &&
|
|
|
2573 P.Tok.is(Close))
|
|
|
2574 LClose = P.ConsumeAnyToken();
|
|
|
2575 return true;
|
|
|
2576 }
|
|
|
2577
|
|
|
2578 void BalancedDelimiterTracker::skipToEnd() {
|
|
|
2579 P.SkipUntil(Close, Parser::StopBeforeMatch);
|
|
|
2580 consumeClose();
|
|
|
2581 }
|
