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1 //===- Preprocessor.cpp - C Language Family Preprocessor Implementation ---===//
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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 Preprocessor interface.
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10 //
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11 //===----------------------------------------------------------------------===//
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12 //
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13 // Options to support:
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14 // -H - Print the name of each header file used.
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15 // -d[DNI] - Dump various things.
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16 // -fworking-directory - #line's with preprocessor's working dir.
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17 // -fpreprocessed
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18 // -dependency-file,-M,-MM,-MF,-MG,-MP,-MT,-MQ,-MD,-MMD
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19 // -W*
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20 // -w
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21 //
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22 // Messages to emit:
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23 // "Multiple include guards may be useful for:\n"
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24 //
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25 //===----------------------------------------------------------------------===//
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26
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27 #include "clang/Lex/Preprocessor.h"
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28 #include "clang/Basic/Builtins.h"
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29 #include "clang/Basic/FileManager.h"
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30 #include "clang/Basic/FileSystemStatCache.h"
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31 #include "clang/Basic/IdentifierTable.h"
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32 #include "clang/Basic/LLVM.h"
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33 #include "clang/Basic/LangOptions.h"
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34 #include "clang/Basic/Module.h"
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35 #include "clang/Basic/SourceLocation.h"
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36 #include "clang/Basic/SourceManager.h"
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37 #include "clang/Basic/TargetInfo.h"
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38 #include "clang/Lex/CodeCompletionHandler.h"
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39 #include "clang/Lex/ExternalPreprocessorSource.h"
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40 #include "clang/Lex/HeaderSearch.h"
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41 #include "clang/Lex/LexDiagnostic.h"
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42 #include "clang/Lex/Lexer.h"
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43 #include "clang/Lex/LiteralSupport.h"
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44 #include "clang/Lex/MacroArgs.h"
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45 #include "clang/Lex/MacroInfo.h"
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46 #include "clang/Lex/ModuleLoader.h"
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47 #include "clang/Lex/Pragma.h"
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48 #include "clang/Lex/PreprocessingRecord.h"
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49 #include "clang/Lex/PreprocessorLexer.h"
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50 #include "clang/Lex/PreprocessorOptions.h"
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51 #include "clang/Lex/ScratchBuffer.h"
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52 #include "clang/Lex/Token.h"
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53 #include "clang/Lex/TokenLexer.h"
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54 #include "llvm/ADT/APInt.h"
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55 #include "llvm/ADT/ArrayRef.h"
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56 #include "llvm/ADT/DenseMap.h"
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57 #include "llvm/ADT/STLExtras.h"
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58 #include "llvm/ADT/SmallString.h"
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59 #include "llvm/ADT/SmallVector.h"
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60 #include "llvm/ADT/StringRef.h"
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61 #include "llvm/ADT/StringSwitch.h"
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62 #include "llvm/Support/Capacity.h"
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63 #include "llvm/Support/ErrorHandling.h"
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64 #include "llvm/Support/MemoryBuffer.h"
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65 #include "llvm/Support/raw_ostream.h"
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66 #include <algorithm>
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67 #include <cassert>
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68 #include <memory>
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69 #include <string>
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70 #include <utility>
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71 #include <vector>
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72
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73 using namespace clang;
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74
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75 LLVM_INSTANTIATE_REGISTRY(PragmaHandlerRegistry)
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76
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77 ExternalPreprocessorSource::~ExternalPreprocessorSource() = default;
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78
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79 Preprocessor::Preprocessor(std::shared_ptr<PreprocessorOptions> PPOpts,
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80 DiagnosticsEngine &diags, LangOptions &opts,
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81 SourceManager &SM, HeaderSearch &Headers,
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82 ModuleLoader &TheModuleLoader,
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83 IdentifierInfoLookup *IILookup, bool OwnsHeaders,
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84 TranslationUnitKind TUKind)
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85 : PPOpts(std::move(PPOpts)), Diags(&diags), LangOpts(opts),
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86 FileMgr(Headers.getFileMgr()), SourceMgr(SM),
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87 ScratchBuf(new ScratchBuffer(SourceMgr)), HeaderInfo(Headers),
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88 TheModuleLoader(TheModuleLoader), ExternalSource(nullptr),
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89 // As the language options may have not been loaded yet (when
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90 // deserializing an ASTUnit), adding keywords to the identifier table is
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91 // deferred to Preprocessor::Initialize().
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92 Identifiers(IILookup), PragmaHandlers(new PragmaNamespace(StringRef())),
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93 TUKind(TUKind), SkipMainFilePreamble(0, true),
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94 CurSubmoduleState(&NullSubmoduleState) {
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95 OwnsHeaderSearch = OwnsHeaders;
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96
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97 // Default to discarding comments.
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98 KeepComments = false;
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99 KeepMacroComments = false;
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100 SuppressIncludeNotFoundError = false;
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101
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102 // Macro expansion is enabled.
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103 DisableMacroExpansion = false;
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104 MacroExpansionInDirectivesOverride = false;
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105 InMacroArgs = false;
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106 ArgMacro = nullptr;
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107 InMacroArgPreExpansion = false;
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108 NumCachedTokenLexers = 0;
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109 PragmasEnabled = true;
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110 ParsingIfOrElifDirective = false;
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111 PreprocessedOutput = false;
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112
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113 // We haven't read anything from the external source.
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114 ReadMacrosFromExternalSource = false;
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115
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116 BuiltinInfo = std::make_unique<Builtin::Context>();
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117
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118 // "Poison" __VA_ARGS__, __VA_OPT__ which can only appear in the expansion of
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119 // a macro. They get unpoisoned where it is allowed.
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120 (Ident__VA_ARGS__ = getIdentifierInfo("__VA_ARGS__"))->setIsPoisoned();
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121 SetPoisonReason(Ident__VA_ARGS__,diag::ext_pp_bad_vaargs_use);
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122 if (getLangOpts().CPlusPlus2a) {
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123 (Ident__VA_OPT__ = getIdentifierInfo("__VA_OPT__"))->setIsPoisoned();
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124 SetPoisonReason(Ident__VA_OPT__,diag::ext_pp_bad_vaopt_use);
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125 } else {
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126 Ident__VA_OPT__ = nullptr;
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127 }
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128
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129 // Initialize the pragma handlers.
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130 RegisterBuiltinPragmas();
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131
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132 // Initialize builtin macros like __LINE__ and friends.
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133 RegisterBuiltinMacros();
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134
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135 if(LangOpts.Borland) {
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136 Ident__exception_info = getIdentifierInfo("_exception_info");
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137 Ident___exception_info = getIdentifierInfo("__exception_info");
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138 Ident_GetExceptionInfo = getIdentifierInfo("GetExceptionInformation");
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139 Ident__exception_code = getIdentifierInfo("_exception_code");
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140 Ident___exception_code = getIdentifierInfo("__exception_code");
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141 Ident_GetExceptionCode = getIdentifierInfo("GetExceptionCode");
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142 Ident__abnormal_termination = getIdentifierInfo("_abnormal_termination");
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143 Ident___abnormal_termination = getIdentifierInfo("__abnormal_termination");
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144 Ident_AbnormalTermination = getIdentifierInfo("AbnormalTermination");
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145 } else {
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146 Ident__exception_info = Ident__exception_code = nullptr;
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147 Ident__abnormal_termination = Ident___exception_info = nullptr;
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148 Ident___exception_code = Ident___abnormal_termination = nullptr;
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149 Ident_GetExceptionInfo = Ident_GetExceptionCode = nullptr;
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150 Ident_AbnormalTermination = nullptr;
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151 }
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152
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152
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153
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150
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154 // If using a PCH where a #pragma hdrstop is expected, start skipping tokens.
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155 if (usingPCHWithPragmaHdrStop())
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156 SkippingUntilPragmaHdrStop = true;
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157
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158 // If using a PCH with a through header, start skipping tokens.
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159 if (!this->PPOpts->PCHThroughHeader.empty() &&
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160 !this->PPOpts->ImplicitPCHInclude.empty())
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161 SkippingUntilPCHThroughHeader = true;
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162
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152
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163 #ifndef noCbC
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164 SavedDepth = 0;
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165 SavedTokenFlag = false;
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166 #endif
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167
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168 if (this->PPOpts->GeneratePreamble)
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169 PreambleConditionalStack.startRecording();
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170
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171 ExcludedConditionalDirectiveSkipMappings =
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172 this->PPOpts->ExcludedConditionalDirectiveSkipMappings;
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173 if (ExcludedConditionalDirectiveSkipMappings)
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174 ExcludedConditionalDirectiveSkipMappings->clear();
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175
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176 MaxTokens = LangOpts.MaxTokens;
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177 }
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178
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179 Preprocessor::~Preprocessor() {
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180 assert(BacktrackPositions.empty() && "EnableBacktrack/Backtrack imbalance!");
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181
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182 IncludeMacroStack.clear();
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183
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184 // Destroy any macro definitions.
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185 while (MacroInfoChain *I = MIChainHead) {
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186 MIChainHead = I->Next;
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187 I->~MacroInfoChain();
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188 }
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189
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190 // Free any cached macro expanders.
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191 // This populates MacroArgCache, so all TokenLexers need to be destroyed
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192 // before the code below that frees up the MacroArgCache list.
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193 std::fill(TokenLexerCache, TokenLexerCache + NumCachedTokenLexers, nullptr);
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194 CurTokenLexer.reset();
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195
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196 // Free any cached MacroArgs.
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197 for (MacroArgs *ArgList = MacroArgCache; ArgList;)
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198 ArgList = ArgList->deallocate();
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199
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200 // Delete the header search info, if we own it.
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201 if (OwnsHeaderSearch)
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202 delete &HeaderInfo;
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203 }
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204
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205 void Preprocessor::Initialize(const TargetInfo &Target,
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206 const TargetInfo *AuxTarget) {
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207 assert((!this->Target || this->Target == &Target) &&
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208 "Invalid override of target information");
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209 this->Target = &Target;
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210
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211 assert((!this->AuxTarget || this->AuxTarget == AuxTarget) &&
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212 "Invalid override of aux target information.");
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213 this->AuxTarget = AuxTarget;
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214
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215 // Initialize information about built-ins.
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216 BuiltinInfo->InitializeTarget(Target, AuxTarget);
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217 HeaderInfo.setTarget(Target);
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218
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219 // Populate the identifier table with info about keywords for the current language.
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220 Identifiers.AddKeywords(LangOpts);
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221 }
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222
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223 void Preprocessor::InitializeForModelFile() {
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224 NumEnteredSourceFiles = 0;
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225
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226 // Reset pragmas
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227 PragmaHandlersBackup = std::move(PragmaHandlers);
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228 PragmaHandlers = std::make_unique<PragmaNamespace>(StringRef());
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229 RegisterBuiltinPragmas();
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230
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231 // Reset PredefinesFileID
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232 PredefinesFileID = FileID();
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233 }
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234
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235 void Preprocessor::FinalizeForModelFile() {
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236 NumEnteredSourceFiles = 1;
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237
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238 PragmaHandlers = std::move(PragmaHandlersBackup);
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239 }
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240
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241 void Preprocessor::DumpToken(const Token &Tok, bool DumpFlags) const {
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242 llvm::errs() << tok::getTokenName(Tok.getKind()) << " '"
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243 << getSpelling(Tok) << "'";
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244
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245 if (!DumpFlags) return;
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246
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247 llvm::errs() << "\t";
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248 if (Tok.isAtStartOfLine())
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249 llvm::errs() << " [StartOfLine]";
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250 if (Tok.hasLeadingSpace())
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251 llvm::errs() << " [LeadingSpace]";
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252 if (Tok.isExpandDisabled())
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253 llvm::errs() << " [ExpandDisabled]";
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254 if (Tok.needsCleaning()) {
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255 const char *Start = SourceMgr.getCharacterData(Tok.getLocation());
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256 llvm::errs() << " [UnClean='" << StringRef(Start, Tok.getLength())
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257 << "']";
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258 }
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259
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260 llvm::errs() << "\tLoc=<";
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261 DumpLocation(Tok.getLocation());
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262 llvm::errs() << ">";
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263 }
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264
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265 void Preprocessor::DumpLocation(SourceLocation Loc) const {
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266 Loc.print(llvm::errs(), SourceMgr);
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267 }
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268
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269 void Preprocessor::DumpMacro(const MacroInfo &MI) const {
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270 llvm::errs() << "MACRO: ";
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271 for (unsigned i = 0, e = MI.getNumTokens(); i != e; ++i) {
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272 DumpToken(MI.getReplacementToken(i));
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273 llvm::errs() << " ";
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274 }
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275 llvm::errs() << "\n";
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276 }
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277
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278 void Preprocessor::PrintStats() {
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279 llvm::errs() << "\n*** Preprocessor Stats:\n";
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280 llvm::errs() << NumDirectives << " directives found:\n";
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281 llvm::errs() << " " << NumDefined << " #define.\n";
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282 llvm::errs() << " " << NumUndefined << " #undef.\n";
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283 llvm::errs() << " #include/#include_next/#import:\n";
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284 llvm::errs() << " " << NumEnteredSourceFiles << " source files entered.\n";
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285 llvm::errs() << " " << MaxIncludeStackDepth << " max include stack depth\n";
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286 llvm::errs() << " " << NumIf << " #if/#ifndef/#ifdef.\n";
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287 llvm::errs() << " " << NumElse << " #else/#elif.\n";
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288 llvm::errs() << " " << NumEndif << " #endif.\n";
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289 llvm::errs() << " " << NumPragma << " #pragma.\n";
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290 llvm::errs() << NumSkipped << " #if/#ifndef#ifdef regions skipped\n";
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291
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292 llvm::errs() << NumMacroExpanded << "/" << NumFnMacroExpanded << "/"
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293 << NumBuiltinMacroExpanded << " obj/fn/builtin macros expanded, "
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294 << NumFastMacroExpanded << " on the fast path.\n";
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295 llvm::errs() << (NumFastTokenPaste+NumTokenPaste)
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296 << " token paste (##) operations performed, "
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297 << NumFastTokenPaste << " on the fast path.\n";
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298
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299 llvm::errs() << "\nPreprocessor Memory: " << getTotalMemory() << "B total";
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300
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301 llvm::errs() << "\n BumpPtr: " << BP.getTotalMemory();
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302 llvm::errs() << "\n Macro Expanded Tokens: "
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303 << llvm::capacity_in_bytes(MacroExpandedTokens);
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304 llvm::errs() << "\n Predefines Buffer: " << Predefines.capacity();
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305 // FIXME: List information for all submodules.
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306 llvm::errs() << "\n Macros: "
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307 << llvm::capacity_in_bytes(CurSubmoduleState->Macros);
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308 llvm::errs() << "\n #pragma push_macro Info: "
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309 << llvm::capacity_in_bytes(PragmaPushMacroInfo);
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310 llvm::errs() << "\n Poison Reasons: "
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311 << llvm::capacity_in_bytes(PoisonReasons);
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312 llvm::errs() << "\n Comment Handlers: "
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313 << llvm::capacity_in_bytes(CommentHandlers) << "\n";
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314 }
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315
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316 Preprocessor::macro_iterator
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317 Preprocessor::macro_begin(bool IncludeExternalMacros) const {
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318 if (IncludeExternalMacros && ExternalSource &&
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319 !ReadMacrosFromExternalSource) {
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320 ReadMacrosFromExternalSource = true;
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321 ExternalSource->ReadDefinedMacros();
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322 }
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323
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324 // Make sure we cover all macros in visible modules.
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325 for (const ModuleMacro &Macro : ModuleMacros)
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326 CurSubmoduleState->Macros.insert(std::make_pair(Macro.II, MacroState()));
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327
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328 return CurSubmoduleState->Macros.begin();
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329 }
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330
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331 size_t Preprocessor::getTotalMemory() const {
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332 return BP.getTotalMemory()
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333 + llvm::capacity_in_bytes(MacroExpandedTokens)
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334 + Predefines.capacity() /* Predefines buffer. */
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335 // FIXME: Include sizes from all submodules, and include MacroInfo sizes,
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336 // and ModuleMacros.
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337 + llvm::capacity_in_bytes(CurSubmoduleState->Macros)
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338 + llvm::capacity_in_bytes(PragmaPushMacroInfo)
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339 + llvm::capacity_in_bytes(PoisonReasons)
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340 + llvm::capacity_in_bytes(CommentHandlers);
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341 }
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342
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343 Preprocessor::macro_iterator
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344 Preprocessor::macro_end(bool IncludeExternalMacros) const {
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345 if (IncludeExternalMacros && ExternalSource &&
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346 !ReadMacrosFromExternalSource) {
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347 ReadMacrosFromExternalSource = true;
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348 ExternalSource->ReadDefinedMacros();
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349 }
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350
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351 return CurSubmoduleState->Macros.end();
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352 }
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353
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354 /// Compares macro tokens with a specified token value sequence.
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355 static bool MacroDefinitionEquals(const MacroInfo *MI,
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356 ArrayRef<TokenValue> Tokens) {
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357 return Tokens.size() == MI->getNumTokens() &&
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358 std::equal(Tokens.begin(), Tokens.end(), MI->tokens_begin());
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359 }
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360
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361 StringRef Preprocessor::getLastMacroWithSpelling(
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362 SourceLocation Loc,
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363 ArrayRef<TokenValue> Tokens) const {
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364 SourceLocation BestLocation;
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365 StringRef BestSpelling;
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366 for (Preprocessor::macro_iterator I = macro_begin(), E = macro_end();
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367 I != E; ++I) {
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368 const MacroDirective::DefInfo
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369 Def = I->second.findDirectiveAtLoc(Loc, SourceMgr);
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370 if (!Def || !Def.getMacroInfo())
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371 continue;
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372 if (!Def.getMacroInfo()->isObjectLike())
|
|
|
373 continue;
|
|
|
374 if (!MacroDefinitionEquals(Def.getMacroInfo(), Tokens))
|
|
|
375 continue;
|
|
|
376 SourceLocation Location = Def.getLocation();
|
|
|
377 // Choose the macro defined latest.
|
|
|
378 if (BestLocation.isInvalid() ||
|
|
|
379 (Location.isValid() &&
|
|
|
380 SourceMgr.isBeforeInTranslationUnit(BestLocation, Location))) {
|
|
|
381 BestLocation = Location;
|
|
|
382 BestSpelling = I->first->getName();
|
|
|
383 }
|
|
|
384 }
|
|
|
385 return BestSpelling;
|
|
|
386 }
|
|
|
387
|
|
|
388 void Preprocessor::recomputeCurLexerKind() {
|
|
|
389 if (CurLexer)
|
|
|
390 CurLexerKind = CLK_Lexer;
|
|
|
391 else if (CurTokenLexer)
|
|
|
392 CurLexerKind = CLK_TokenLexer;
|
|
|
393 else
|
|
|
394 CurLexerKind = CLK_CachingLexer;
|
|
|
395 }
|
|
|
396
|
|
|
397 bool Preprocessor::SetCodeCompletionPoint(const FileEntry *File,
|
|
|
398 unsigned CompleteLine,
|
|
|
399 unsigned CompleteColumn) {
|
|
|
400 assert(File);
|
|
|
401 assert(CompleteLine && CompleteColumn && "Starts from 1:1");
|
|
|
402 assert(!CodeCompletionFile && "Already set");
|
|
|
403
|
|
|
404 using llvm::MemoryBuffer;
|
|
|
405
|
|
|
406 // Load the actual file's contents.
|
|
|
407 bool Invalid = false;
|
|
|
408 const MemoryBuffer *Buffer = SourceMgr.getMemoryBufferForFile(File, &Invalid);
|
|
|
409 if (Invalid)
|
|
|
410 return true;
|
|
|
411
|
|
|
412 // Find the byte position of the truncation point.
|
|
|
413 const char *Position = Buffer->getBufferStart();
|
|
|
414 for (unsigned Line = 1; Line < CompleteLine; ++Line) {
|
|
|
415 for (; *Position; ++Position) {
|
|
|
416 if (*Position != '\r' && *Position != '\n')
|
|
|
417 continue;
|
|
|
418
|
|
|
419 // Eat \r\n or \n\r as a single line.
|
|
|
420 if ((Position[1] == '\r' || Position[1] == '\n') &&
|
|
|
421 Position[0] != Position[1])
|
|
|
422 ++Position;
|
|
|
423 ++Position;
|
|
|
424 break;
|
|
|
425 }
|
|
|
426 }
|
|
|
427
|
|
|
428 Position += CompleteColumn - 1;
|
|
|
429
|
|
|
430 // If pointing inside the preamble, adjust the position at the beginning of
|
|
|
431 // the file after the preamble.
|
|
|
432 if (SkipMainFilePreamble.first &&
|
|
|
433 SourceMgr.getFileEntryForID(SourceMgr.getMainFileID()) == File) {
|
|
|
434 if (Position - Buffer->getBufferStart() < SkipMainFilePreamble.first)
|
|
|
435 Position = Buffer->getBufferStart() + SkipMainFilePreamble.first;
|
|
|
436 }
|
|
|
437
|
|
|
438 if (Position > Buffer->getBufferEnd())
|
|
|
439 Position = Buffer->getBufferEnd();
|
|
|
440
|
|
|
441 CodeCompletionFile = File;
|
|
|
442 CodeCompletionOffset = Position - Buffer->getBufferStart();
|
|
|
443
|
|
|
444 auto NewBuffer = llvm::WritableMemoryBuffer::getNewUninitMemBuffer(
|
|
|
445 Buffer->getBufferSize() + 1, Buffer->getBufferIdentifier());
|
|
|
446 char *NewBuf = NewBuffer->getBufferStart();
|
|
|
447 char *NewPos = std::copy(Buffer->getBufferStart(), Position, NewBuf);
|
|
|
448 *NewPos = '\0';
|
|
|
449 std::copy(Position, Buffer->getBufferEnd(), NewPos+1);
|
|
|
450 SourceMgr.overrideFileContents(File, std::move(NewBuffer));
|
|
|
451
|
|
|
452 return false;
|
|
|
453 }
|
|
|
454
|
|
|
455 void Preprocessor::CodeCompleteIncludedFile(llvm::StringRef Dir,
|
|
|
456 bool IsAngled) {
|
|
|
457 if (CodeComplete)
|
|
|
458 CodeComplete->CodeCompleteIncludedFile(Dir, IsAngled);
|
|
|
459 setCodeCompletionReached();
|
|
|
460 }
|
|
|
461
|
|
|
462 void Preprocessor::CodeCompleteNaturalLanguage() {
|
|
|
463 if (CodeComplete)
|
|
|
464 CodeComplete->CodeCompleteNaturalLanguage();
|
|
|
465 setCodeCompletionReached();
|
|
|
466 }
|
|
|
467
|
|
|
468 /// getSpelling - This method is used to get the spelling of a token into a
|
|
|
469 /// SmallVector. Note that the returned StringRef may not point to the
|
|
|
470 /// supplied buffer if a copy can be avoided.
|
|
|
471 StringRef Preprocessor::getSpelling(const Token &Tok,
|
|
|
472 SmallVectorImpl<char> &Buffer,
|
|
|
473 bool *Invalid) const {
|
|
|
474 // NOTE: this has to be checked *before* testing for an IdentifierInfo.
|
|
|
475 if (Tok.isNot(tok::raw_identifier) && !Tok.hasUCN()) {
|
|
|
476 // Try the fast path.
|
|
|
477 if (const IdentifierInfo *II = Tok.getIdentifierInfo())
|
|
|
478 return II->getName();
|
|
|
479 }
|
|
|
480
|
|
|
481 // Resize the buffer if we need to copy into it.
|
|
|
482 if (Tok.needsCleaning())
|
|
|
483 Buffer.resize(Tok.getLength());
|
|
|
484
|
|
|
485 const char *Ptr = Buffer.data();
|
|
|
486 unsigned Len = getSpelling(Tok, Ptr, Invalid);
|
|
|
487 return StringRef(Ptr, Len);
|
|
|
488 }
|
|
|
489
|
|
|
490 /// CreateString - Plop the specified string into a scratch buffer and return a
|
|
|
491 /// location for it. If specified, the source location provides a source
|
|
|
492 /// location for the token.
|
|
|
493 void Preprocessor::CreateString(StringRef Str, Token &Tok,
|
|
|
494 SourceLocation ExpansionLocStart,
|
|
|
495 SourceLocation ExpansionLocEnd) {
|
|
|
496 Tok.setLength(Str.size());
|
|
|
497
|
|
|
498 const char *DestPtr;
|
|
|
499 SourceLocation Loc = ScratchBuf->getToken(Str.data(), Str.size(), DestPtr);
|
|
|
500
|
|
|
501 if (ExpansionLocStart.isValid())
|
|
|
502 Loc = SourceMgr.createExpansionLoc(Loc, ExpansionLocStart,
|
|
|
503 ExpansionLocEnd, Str.size());
|
|
|
504 Tok.setLocation(Loc);
|
|
|
505
|
|
|
506 // If this is a raw identifier or a literal token, set the pointer data.
|
|
|
507 if (Tok.is(tok::raw_identifier))
|
|
|
508 Tok.setRawIdentifierData(DestPtr);
|
|
|
509 else if (Tok.isLiteral())
|
|
|
510 Tok.setLiteralData(DestPtr);
|
|
|
511 }
|
|
|
512
|
|
|
513 SourceLocation Preprocessor::SplitToken(SourceLocation Loc, unsigned Length) {
|
|
|
514 auto &SM = getSourceManager();
|
|
|
515 SourceLocation SpellingLoc = SM.getSpellingLoc(Loc);
|
|
|
516 std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(SpellingLoc);
|
|
|
517 bool Invalid = false;
|
|
|
518 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
|
|
|
519 if (Invalid)
|
|
|
520 return SourceLocation();
|
|
|
521
|
|
|
522 // FIXME: We could consider re-using spelling for tokens we see repeatedly.
|
|
|
523 const char *DestPtr;
|
|
|
524 SourceLocation Spelling =
|
|
|
525 ScratchBuf->getToken(Buffer.data() + LocInfo.second, Length, DestPtr);
|
|
|
526 return SM.createTokenSplitLoc(Spelling, Loc, Loc.getLocWithOffset(Length));
|
|
|
527 }
|
|
|
528
|
|
|
529 Module *Preprocessor::getCurrentModule() {
|
|
|
530 if (!getLangOpts().isCompilingModule())
|
|
|
531 return nullptr;
|
|
|
532
|
|
|
533 return getHeaderSearchInfo().lookupModule(getLangOpts().CurrentModule);
|
|
|
534 }
|
|
|
535
|
|
|
536 //===----------------------------------------------------------------------===//
|
|
|
537 // Preprocessor Initialization Methods
|
|
|
538 //===----------------------------------------------------------------------===//
|
|
|
539
|
|
|
540 /// EnterMainSourceFile - Enter the specified FileID as the main source file,
|
|
|
541 /// which implicitly adds the builtin defines etc.
|
|
|
542 void Preprocessor::EnterMainSourceFile() {
|
|
|
543 // We do not allow the preprocessor to reenter the main file. Doing so will
|
|
|
544 // cause FileID's to accumulate information from both runs (e.g. #line
|
|
|
545 // information) and predefined macros aren't guaranteed to be set properly.
|
|
|
546 assert(NumEnteredSourceFiles == 0 && "Cannot reenter the main file!");
|
|
|
547 FileID MainFileID = SourceMgr.getMainFileID();
|
|
|
548
|
|
|
549 // If MainFileID is loaded it means we loaded an AST file, no need to enter
|
|
|
550 // a main file.
|
|
|
551 if (!SourceMgr.isLoadedFileID(MainFileID)) {
|
|
|
552 // Enter the main file source buffer.
|
|
|
553 EnterSourceFile(MainFileID, nullptr, SourceLocation());
|
|
|
554
|
|
|
555 // If we've been asked to skip bytes in the main file (e.g., as part of a
|
|
|
556 // precompiled preamble), do so now.
|
|
|
557 if (SkipMainFilePreamble.first > 0)
|
|
|
558 CurLexer->SetByteOffset(SkipMainFilePreamble.first,
|
|
|
559 SkipMainFilePreamble.second);
|
|
|
560
|
|
|
561 // Tell the header info that the main file was entered. If the file is later
|
|
|
562 // #imported, it won't be re-entered.
|
|
|
563 if (const FileEntry *FE = SourceMgr.getFileEntryForID(MainFileID))
|
|
|
564 HeaderInfo.IncrementIncludeCount(FE);
|
|
|
565 }
|
|
|
566
|
|
|
567 // Preprocess Predefines to populate the initial preprocessor state.
|
|
|
568 std::unique_ptr<llvm::MemoryBuffer> SB =
|
|
|
569 llvm::MemoryBuffer::getMemBufferCopy(Predefines, "<built-in>");
|
|
|
570 assert(SB && "Cannot create predefined source buffer");
|
|
|
571 FileID FID = SourceMgr.createFileID(std::move(SB));
|
|
|
572 assert(FID.isValid() && "Could not create FileID for predefines?");
|
|
|
573 setPredefinesFileID(FID);
|
|
|
574
|
|
|
575 // Start parsing the predefines.
|
|
|
576 EnterSourceFile(FID, nullptr, SourceLocation());
|
|
|
577
|
|
|
578 if (!PPOpts->PCHThroughHeader.empty()) {
|
|
|
579 // Lookup and save the FileID for the through header. If it isn't found
|
|
|
580 // in the search path, it's a fatal error.
|
|
|
581 const DirectoryLookup *CurDir;
|
|
|
582 Optional<FileEntryRef> File = LookupFile(
|
|
|
583 SourceLocation(), PPOpts->PCHThroughHeader,
|
|
|
584 /*isAngled=*/false, /*FromDir=*/nullptr, /*FromFile=*/nullptr, CurDir,
|
|
|
585 /*SearchPath=*/nullptr, /*RelativePath=*/nullptr,
|
|
|
586 /*SuggestedModule=*/nullptr, /*IsMapped=*/nullptr,
|
|
|
587 /*IsFrameworkFound=*/nullptr);
|
|
|
588 if (!File) {
|
|
|
589 Diag(SourceLocation(), diag::err_pp_through_header_not_found)
|
|
|
590 << PPOpts->PCHThroughHeader;
|
|
|
591 return;
|
|
|
592 }
|
|
|
593 setPCHThroughHeaderFileID(
|
|
|
594 SourceMgr.createFileID(*File, SourceLocation(), SrcMgr::C_User));
|
|
|
595 }
|
|
|
596
|
|
|
597 // Skip tokens from the Predefines and if needed the main file.
|
|
|
598 if ((usingPCHWithThroughHeader() && SkippingUntilPCHThroughHeader) ||
|
|
|
599 (usingPCHWithPragmaHdrStop() && SkippingUntilPragmaHdrStop))
|
|
|
600 SkipTokensWhileUsingPCH();
|
|
|
601 }
|
|
|
602
|
|
|
603 void Preprocessor::setPCHThroughHeaderFileID(FileID FID) {
|
|
|
604 assert(PCHThroughHeaderFileID.isInvalid() &&
|
|
|
605 "PCHThroughHeaderFileID already set!");
|
|
|
606 PCHThroughHeaderFileID = FID;
|
|
|
607 }
|
|
|
608
|
|
|
609 bool Preprocessor::isPCHThroughHeader(const FileEntry *FE) {
|
|
|
610 assert(PCHThroughHeaderFileID.isValid() &&
|
|
|
611 "Invalid PCH through header FileID");
|
|
|
612 return FE == SourceMgr.getFileEntryForID(PCHThroughHeaderFileID);
|
|
|
613 }
|
|
|
614
|
|
|
615 bool Preprocessor::creatingPCHWithThroughHeader() {
|
|
|
616 return TUKind == TU_Prefix && !PPOpts->PCHThroughHeader.empty() &&
|
|
|
617 PCHThroughHeaderFileID.isValid();
|
|
|
618 }
|
|
|
619
|
|
|
620 bool Preprocessor::usingPCHWithThroughHeader() {
|
|
|
621 return TUKind != TU_Prefix && !PPOpts->PCHThroughHeader.empty() &&
|
|
|
622 PCHThroughHeaderFileID.isValid();
|
|
|
623 }
|
|
|
624
|
|
|
625 bool Preprocessor::creatingPCHWithPragmaHdrStop() {
|
|
|
626 return TUKind == TU_Prefix && PPOpts->PCHWithHdrStop;
|
|
|
627 }
|
|
|
628
|
|
|
629 bool Preprocessor::usingPCHWithPragmaHdrStop() {
|
|
|
630 return TUKind != TU_Prefix && PPOpts->PCHWithHdrStop;
|
|
|
631 }
|
|
|
632
|
|
|
633 /// Skip tokens until after the #include of the through header or
|
|
|
634 /// until after a #pragma hdrstop is seen. Tokens in the predefines file
|
|
|
635 /// and the main file may be skipped. If the end of the predefines file
|
|
|
636 /// is reached, skipping continues into the main file. If the end of the
|
|
|
637 /// main file is reached, it's a fatal error.
|
|
|
638 void Preprocessor::SkipTokensWhileUsingPCH() {
|
|
|
639 bool ReachedMainFileEOF = false;
|
|
|
640 bool UsingPCHThroughHeader = SkippingUntilPCHThroughHeader;
|
|
|
641 bool UsingPragmaHdrStop = SkippingUntilPragmaHdrStop;
|
|
|
642 Token Tok;
|
|
|
643 while (true) {
|
|
|
644 bool InPredefines =
|
|
|
645 (CurLexer && CurLexer->getFileID() == getPredefinesFileID());
|
|
|
646 switch (CurLexerKind) {
|
|
|
647 case CLK_Lexer:
|
|
|
648 CurLexer->Lex(Tok);
|
|
|
649 break;
|
|
|
650 case CLK_TokenLexer:
|
|
|
651 CurTokenLexer->Lex(Tok);
|
|
|
652 break;
|
|
|
653 case CLK_CachingLexer:
|
|
|
654 CachingLex(Tok);
|
|
|
655 break;
|
|
|
656 case CLK_LexAfterModuleImport:
|
|
|
657 LexAfterModuleImport(Tok);
|
|
|
658 break;
|
|
|
659 }
|
|
|
660 if (Tok.is(tok::eof) && !InPredefines) {
|
|
|
661 ReachedMainFileEOF = true;
|
|
|
662 break;
|
|
|
663 }
|
|
|
664 if (UsingPCHThroughHeader && !SkippingUntilPCHThroughHeader)
|
|
|
665 break;
|
|
|
666 if (UsingPragmaHdrStop && !SkippingUntilPragmaHdrStop)
|
|
|
667 break;
|
|
|
668 }
|
|
|
669 if (ReachedMainFileEOF) {
|
|
|
670 if (UsingPCHThroughHeader)
|
|
|
671 Diag(SourceLocation(), diag::err_pp_through_header_not_seen)
|
|
|
672 << PPOpts->PCHThroughHeader << 1;
|
|
|
673 else if (!PPOpts->PCHWithHdrStopCreate)
|
|
|
674 Diag(SourceLocation(), diag::err_pp_pragma_hdrstop_not_seen);
|
|
|
675 }
|
|
|
676 }
|
|
|
677
|
|
|
678 void Preprocessor::replayPreambleConditionalStack() {
|
|
|
679 // Restore the conditional stack from the preamble, if there is one.
|
|
|
680 if (PreambleConditionalStack.isReplaying()) {
|
|
|
681 assert(CurPPLexer &&
|
|
|
682 "CurPPLexer is null when calling replayPreambleConditionalStack.");
|
|
|
683 CurPPLexer->setConditionalLevels(PreambleConditionalStack.getStack());
|
|
|
684 PreambleConditionalStack.doneReplaying();
|
|
|
685 if (PreambleConditionalStack.reachedEOFWhileSkipping())
|
|
|
686 SkipExcludedConditionalBlock(
|
|
|
687 PreambleConditionalStack.SkipInfo->HashTokenLoc,
|
|
|
688 PreambleConditionalStack.SkipInfo->IfTokenLoc,
|
|
|
689 PreambleConditionalStack.SkipInfo->FoundNonSkipPortion,
|
|
|
690 PreambleConditionalStack.SkipInfo->FoundElse,
|
|
|
691 PreambleConditionalStack.SkipInfo->ElseLoc);
|
|
|
692 }
|
|
|
693 }
|
|
|
694
|
|
|
695 void Preprocessor::EndSourceFile() {
|
|
|
696 // Notify the client that we reached the end of the source file.
|
|
|
697 if (Callbacks)
|
|
|
698 Callbacks->EndOfMainFile();
|
|
|
699 }
|
|
|
700
|
|
|
701 //===----------------------------------------------------------------------===//
|
|
|
702 // Lexer Event Handling.
|
|
|
703 //===----------------------------------------------------------------------===//
|
|
|
704
|
|
|
705 /// LookUpIdentifierInfo - Given a tok::raw_identifier token, look up the
|
|
|
706 /// identifier information for the token and install it into the token,
|
|
|
707 /// updating the token kind accordingly.
|
|
|
708 IdentifierInfo *Preprocessor::LookUpIdentifierInfo(Token &Identifier) const {
|
|
|
709 assert(!Identifier.getRawIdentifier().empty() && "No raw identifier data!");
|
|
|
710
|
|
|
711 // Look up this token, see if it is a macro, or if it is a language keyword.
|
|
|
712 IdentifierInfo *II;
|
|
|
713 if (!Identifier.needsCleaning() && !Identifier.hasUCN()) {
|
|
|
714 // No cleaning needed, just use the characters from the lexed buffer.
|
|
|
715 II = getIdentifierInfo(Identifier.getRawIdentifier());
|
|
|
716 } else {
|
|
|
717 // Cleaning needed, alloca a buffer, clean into it, then use the buffer.
|
|
|
718 SmallString<64> IdentifierBuffer;
|
|
|
719 StringRef CleanedStr = getSpelling(Identifier, IdentifierBuffer);
|
|
|
720
|
|
|
721 if (Identifier.hasUCN()) {
|
|
|
722 SmallString<64> UCNIdentifierBuffer;
|
|
|
723 expandUCNs(UCNIdentifierBuffer, CleanedStr);
|
|
|
724 II = getIdentifierInfo(UCNIdentifierBuffer);
|
|
|
725 } else {
|
|
|
726 II = getIdentifierInfo(CleanedStr);
|
|
|
727 }
|
|
|
728 }
|
|
|
729
|
|
|
730 // Update the token info (identifier info and appropriate token kind).
|
|
|
731 Identifier.setIdentifierInfo(II);
|
|
|
732 if (getLangOpts().MSVCCompat && II->isCPlusPlusOperatorKeyword() &&
|
|
|
733 getSourceManager().isInSystemHeader(Identifier.getLocation()))
|
|
|
734 Identifier.setKind(tok::identifier);
|
|
|
735 else
|
|
|
736 Identifier.setKind(II->getTokenID());
|
|
|
737
|
|
|
738 return II;
|
|
|
739 }
|
|
|
740
|
|
|
741 void Preprocessor::SetPoisonReason(IdentifierInfo *II, unsigned DiagID) {
|
|
|
742 PoisonReasons[II] = DiagID;
|
|
|
743 }
|
|
|
744
|
|
|
745 void Preprocessor::PoisonSEHIdentifiers(bool Poison) {
|
|
|
746 assert(Ident__exception_code && Ident__exception_info);
|
|
|
747 assert(Ident___exception_code && Ident___exception_info);
|
|
|
748 Ident__exception_code->setIsPoisoned(Poison);
|
|
|
749 Ident___exception_code->setIsPoisoned(Poison);
|
|
|
750 Ident_GetExceptionCode->setIsPoisoned(Poison);
|
|
|
751 Ident__exception_info->setIsPoisoned(Poison);
|
|
|
752 Ident___exception_info->setIsPoisoned(Poison);
|
|
|
753 Ident_GetExceptionInfo->setIsPoisoned(Poison);
|
|
|
754 Ident__abnormal_termination->setIsPoisoned(Poison);
|
|
|
755 Ident___abnormal_termination->setIsPoisoned(Poison);
|
|
|
756 Ident_AbnormalTermination->setIsPoisoned(Poison);
|
|
|
757 }
|
|
|
758
|
|
|
759 void Preprocessor::HandlePoisonedIdentifier(Token & Identifier) {
|
|
|
760 assert(Identifier.getIdentifierInfo() &&
|
|
|
761 "Can't handle identifiers without identifier info!");
|
|
|
762 llvm::DenseMap<IdentifierInfo*,unsigned>::const_iterator it =
|
|
|
763 PoisonReasons.find(Identifier.getIdentifierInfo());
|
|
|
764 if(it == PoisonReasons.end())
|
|
|
765 Diag(Identifier, diag::err_pp_used_poisoned_id);
|
|
|
766 else
|
|
|
767 Diag(Identifier,it->second) << Identifier.getIdentifierInfo();
|
|
|
768 }
|
|
|
769
|
|
|
770 /// Returns a diagnostic message kind for reporting a future keyword as
|
|
|
771 /// appropriate for the identifier and specified language.
|
|
|
772 static diag::kind getFutureCompatDiagKind(const IdentifierInfo &II,
|
|
|
773 const LangOptions &LangOpts) {
|
|
|
774 assert(II.isFutureCompatKeyword() && "diagnostic should not be needed");
|
|
|
775
|
|
|
776 if (LangOpts.CPlusPlus)
|
|
|
777 return llvm::StringSwitch<diag::kind>(II.getName())
|
|
|
778 #define CXX11_KEYWORD(NAME, FLAGS) \
|
|
|
779 .Case(#NAME, diag::warn_cxx11_keyword)
|
|
|
780 #define CXX2A_KEYWORD(NAME, FLAGS) \
|
|
|
781 .Case(#NAME, diag::warn_cxx2a_keyword)
|
|
|
782 #include "clang/Basic/TokenKinds.def"
|
|
|
783 ;
|
|
|
784
|
|
|
785 llvm_unreachable(
|
|
|
786 "Keyword not known to come from a newer Standard or proposed Standard");
|
|
|
787 }
|
|
|
788
|
|
|
789 void Preprocessor::updateOutOfDateIdentifier(IdentifierInfo &II) const {
|
|
|
790 assert(II.isOutOfDate() && "not out of date");
|
|
|
791 getExternalSource()->updateOutOfDateIdentifier(II);
|
|
|
792 }
|
|
|
793
|
|
|
794 /// HandleIdentifier - This callback is invoked when the lexer reads an
|
|
|
795 /// identifier. This callback looks up the identifier in the map and/or
|
|
|
796 /// potentially macro expands it or turns it into a named token (like 'for').
|
|
|
797 ///
|
|
|
798 /// Note that callers of this method are guarded by checking the
|
|
|
799 /// IdentifierInfo's 'isHandleIdentifierCase' bit. If this method changes, the
|
|
|
800 /// IdentifierInfo methods that compute these properties will need to change to
|
|
|
801 /// match.
|
|
|
802 bool Preprocessor::HandleIdentifier(Token &Identifier) {
|
|
|
803 assert(Identifier.getIdentifierInfo() &&
|
|
|
804 "Can't handle identifiers without identifier info!");
|
|
|
805
|
|
|
806 IdentifierInfo &II = *Identifier.getIdentifierInfo();
|
|
|
807
|
|
|
808 // If the information about this identifier is out of date, update it from
|
|
|
809 // the external source.
|
|
|
810 // We have to treat __VA_ARGS__ in a special way, since it gets
|
|
|
811 // serialized with isPoisoned = true, but our preprocessor may have
|
|
|
812 // unpoisoned it if we're defining a C99 macro.
|
|
|
813 if (II.isOutOfDate()) {
|
|
|
814 bool CurrentIsPoisoned = false;
|
|
|
815 const bool IsSpecialVariadicMacro =
|
|
|
816 &II == Ident__VA_ARGS__ || &II == Ident__VA_OPT__;
|
|
|
817 if (IsSpecialVariadicMacro)
|
|
|
818 CurrentIsPoisoned = II.isPoisoned();
|
|
|
819
|
|
|
820 updateOutOfDateIdentifier(II);
|
|
|
821 Identifier.setKind(II.getTokenID());
|
|
|
822
|
|
|
823 if (IsSpecialVariadicMacro)
|
|
|
824 II.setIsPoisoned(CurrentIsPoisoned);
|
|
|
825 }
|
|
|
826
|
|
|
827 // If this identifier was poisoned, and if it was not produced from a macro
|
|
|
828 // expansion, emit an error.
|
|
|
829 if (II.isPoisoned() && CurPPLexer) {
|
|
|
830 HandlePoisonedIdentifier(Identifier);
|
|
|
831 }
|
|
|
832
|
|
|
833 // If this is a macro to be expanded, do it.
|
|
|
834 if (MacroDefinition MD = getMacroDefinition(&II)) {
|
|
|
835 auto *MI = MD.getMacroInfo();
|
|
|
836 assert(MI && "macro definition with no macro info?");
|
|
|
837 if (!DisableMacroExpansion) {
|
|
|
838 if (!Identifier.isExpandDisabled() && MI->isEnabled()) {
|
|
|
839 // C99 6.10.3p10: If the preprocessing token immediately after the
|
|
|
840 // macro name isn't a '(', this macro should not be expanded.
|
|
|
841 if (!MI->isFunctionLike() || isNextPPTokenLParen())
|
|
|
842 return HandleMacroExpandedIdentifier(Identifier, MD);
|
|
|
843 } else {
|
|
|
844 // C99 6.10.3.4p2 says that a disabled macro may never again be
|
|
|
845 // expanded, even if it's in a context where it could be expanded in the
|
|
|
846 // future.
|
|
|
847 Identifier.setFlag(Token::DisableExpand);
|
|
|
848 if (MI->isObjectLike() || isNextPPTokenLParen())
|
|
|
849 Diag(Identifier, diag::pp_disabled_macro_expansion);
|
|
|
850 }
|
|
|
851 }
|
|
|
852 }
|
|
|
853
|
|
|
854 // If this identifier is a keyword in a newer Standard or proposed Standard,
|
|
|
855 // produce a warning. Don't warn if we're not considering macro expansion,
|
|
|
856 // since this identifier might be the name of a macro.
|
|
|
857 // FIXME: This warning is disabled in cases where it shouldn't be, like
|
|
|
858 // "#define constexpr constexpr", "int constexpr;"
|
|
|
859 if (II.isFutureCompatKeyword() && !DisableMacroExpansion) {
|
|
|
860 Diag(Identifier, getFutureCompatDiagKind(II, getLangOpts()))
|
|
|
861 << II.getName();
|
|
|
862 // Don't diagnose this keyword again in this translation unit.
|
|
|
863 II.setIsFutureCompatKeyword(false);
|
|
|
864 }
|
|
|
865
|
|
|
866 // If this is an extension token, diagnose its use.
|
|
|
867 // We avoid diagnosing tokens that originate from macro definitions.
|
|
|
868 // FIXME: This warning is disabled in cases where it shouldn't be,
|
|
|
869 // like "#define TY typeof", "TY(1) x".
|
|
|
870 if (II.isExtensionToken() && !DisableMacroExpansion)
|
|
|
871 Diag(Identifier, diag::ext_token_used);
|
|
|
872
|
|
|
873 // If this is the 'import' contextual keyword following an '@', note
|
|
|
874 // that the next token indicates a module name.
|
|
|
875 //
|
|
|
876 // Note that we do not treat 'import' as a contextual
|
|
|
877 // keyword when we're in a caching lexer, because caching lexers only get
|
|
|
878 // used in contexts where import declarations are disallowed.
|
|
|
879 //
|
|
|
880 // Likewise if this is the C++ Modules TS import keyword.
|
|
|
881 if (((LastTokenWasAt && II.isModulesImport()) ||
|
|
|
882 Identifier.is(tok::kw_import)) &&
|
|
|
883 !InMacroArgs && !DisableMacroExpansion &&
|
|
|
884 (getLangOpts().Modules || getLangOpts().DebuggerSupport) &&
|
|
|
885 CurLexerKind != CLK_CachingLexer) {
|
|
|
886 ModuleImportLoc = Identifier.getLocation();
|
|
|
887 ModuleImportPath.clear();
|
|
|
888 ModuleImportExpectsIdentifier = true;
|
|
|
889 CurLexerKind = CLK_LexAfterModuleImport;
|
|
|
890 }
|
|
|
891 return true;
|
|
|
892 }
|
|
|
893
|
|
|
894 void Preprocessor::Lex(Token &Result) {
|
|
|
895 ++LexLevel;
|
|
|
896
|
|
|
897 // We loop here until a lex function returns a token; this avoids recursion.
|
|
|
898 bool ReturnedToken;
|
|
|
899 do {
|
|
|
900 switch (CurLexerKind) {
|
|
|
901 case CLK_Lexer:
|
|
152
|
902 #ifndef noCbC
|
|
|
903 ReturnedToken = CurLexer->Lex(Result, ProtoParsing);
|
|
|
904 #else
|
|
150
|
905 ReturnedToken = CurLexer->Lex(Result);
|
|
152
|
906 #endif
|
|
150
|
907 break;
|
|
|
908 case CLK_TokenLexer:
|
|
|
909 ReturnedToken = CurTokenLexer->Lex(Result);
|
|
|
910 break;
|
|
|
911 case CLK_CachingLexer:
|
|
|
912 CachingLex(Result);
|
|
|
913 ReturnedToken = true;
|
|
|
914 break;
|
|
|
915 case CLK_LexAfterModuleImport:
|
|
|
916 ReturnedToken = LexAfterModuleImport(Result);
|
|
|
917 break;
|
|
|
918 }
|
|
|
919 } while (!ReturnedToken);
|
|
|
920
|
|
|
921 if (Result.is(tok::unknown) && TheModuleLoader.HadFatalFailure)
|
|
|
922 return;
|
|
|
923
|
|
|
924 if (Result.is(tok::code_completion) && Result.getIdentifierInfo()) {
|
|
|
925 // Remember the identifier before code completion token.
|
|
|
926 setCodeCompletionIdentifierInfo(Result.getIdentifierInfo());
|
|
|
927 setCodeCompletionTokenRange(Result.getLocation(), Result.getEndLoc());
|
|
|
928 // Set IdenfitierInfo to null to avoid confusing code that handles both
|
|
|
929 // identifiers and completion tokens.
|
|
|
930 Result.setIdentifierInfo(nullptr);
|
|
|
931 }
|
|
|
932
|
|
|
933 // Update ImportSeqState to track our position within a C++20 import-seq
|
|
|
934 // if this token is being produced as a result of phase 4 of translation.
|
|
|
935 if (getLangOpts().CPlusPlusModules && LexLevel == 1 &&
|
|
|
936 !Result.getFlag(Token::IsReinjected)) {
|
|
|
937 switch (Result.getKind()) {
|
|
|
938 case tok::l_paren: case tok::l_square: case tok::l_brace:
|
|
|
939 ImportSeqState.handleOpenBracket();
|
|
|
940 break;
|
|
|
941 case tok::r_paren: case tok::r_square:
|
|
|
942 ImportSeqState.handleCloseBracket();
|
|
|
943 break;
|
|
|
944 case tok::r_brace:
|
|
|
945 ImportSeqState.handleCloseBrace();
|
|
|
946 break;
|
|
|
947 case tok::semi:
|
|
|
948 ImportSeqState.handleSemi();
|
|
|
949 break;
|
|
|
950 case tok::header_name:
|
|
|
951 case tok::annot_header_unit:
|
|
|
952 ImportSeqState.handleHeaderName();
|
|
|
953 break;
|
|
|
954 case tok::kw_export:
|
|
|
955 ImportSeqState.handleExport();
|
|
|
956 break;
|
|
|
957 case tok::identifier:
|
|
|
958 if (Result.getIdentifierInfo()->isModulesImport()) {
|
|
|
959 ImportSeqState.handleImport();
|
|
|
960 if (ImportSeqState.afterImportSeq()) {
|
|
|
961 ModuleImportLoc = Result.getLocation();
|
|
|
962 ModuleImportPath.clear();
|
|
|
963 ModuleImportExpectsIdentifier = true;
|
|
|
964 CurLexerKind = CLK_LexAfterModuleImport;
|
|
|
965 }
|
|
|
966 break;
|
|
|
967 }
|
|
|
968 LLVM_FALLTHROUGH;
|
|
|
969 default:
|
|
|
970 ImportSeqState.handleMisc();
|
|
|
971 break;
|
|
|
972 }
|
|
|
973 }
|
|
|
974
|
|
|
975 LastTokenWasAt = Result.is(tok::at);
|
|
|
976 --LexLevel;
|
|
|
977
|
|
|
978 if (LexLevel == 0 && !Result.getFlag(Token::IsReinjected)) {
|
|
|
979 ++TokenCount;
|
|
|
980 if (OnToken)
|
|
|
981 OnToken(Result);
|
|
|
982 }
|
|
|
983 }
|
|
|
984
|
|
|
985 /// Lex a header-name token (including one formed from header-name-tokens if
|
|
|
986 /// \p AllowConcatenation is \c true).
|
|
|
987 ///
|
|
|
988 /// \param FilenameTok Filled in with the next token. On success, this will
|
|
|
989 /// be either a header_name token. On failure, it will be whatever other
|
|
|
990 /// token was found instead.
|
|
|
991 /// \param AllowMacroExpansion If \c true, allow the header name to be formed
|
|
|
992 /// by macro expansion (concatenating tokens as necessary if the first
|
|
|
993 /// token is a '<').
|
|
|
994 /// \return \c true if we reached EOD or EOF while looking for a > token in
|
|
|
995 /// a concatenated header name and diagnosed it. \c false otherwise.
|
|
|
996 bool Preprocessor::LexHeaderName(Token &FilenameTok, bool AllowMacroExpansion) {
|
|
|
997 // Lex using header-name tokenization rules if tokens are being lexed from
|
|
|
998 // a file. Just grab a token normally if we're in a macro expansion.
|
|
|
999 if (CurPPLexer)
|
|
|
1000 CurPPLexer->LexIncludeFilename(FilenameTok);
|
|
|
1001 else
|
|
|
1002 Lex(FilenameTok);
|
|
|
1003
|
|
|
1004 // This could be a <foo/bar.h> file coming from a macro expansion. In this
|
|
|
1005 // case, glue the tokens together into an angle_string_literal token.
|
|
|
1006 SmallString<128> FilenameBuffer;
|
|
|
1007 if (FilenameTok.is(tok::less) && AllowMacroExpansion) {
|
|
|
1008 bool StartOfLine = FilenameTok.isAtStartOfLine();
|
|
|
1009 bool LeadingSpace = FilenameTok.hasLeadingSpace();
|
|
|
1010 bool LeadingEmptyMacro = FilenameTok.hasLeadingEmptyMacro();
|
|
|
1011
|
|
|
1012 SourceLocation Start = FilenameTok.getLocation();
|
|
|
1013 SourceLocation End;
|
|
|
1014 FilenameBuffer.push_back('<');
|
|
|
1015
|
|
|
1016 // Consume tokens until we find a '>'.
|
|
|
1017 // FIXME: A header-name could be formed starting or ending with an
|
|
|
1018 // alternative token. It's not clear whether that's ill-formed in all
|
|
|
1019 // cases.
|
|
|
1020 while (FilenameTok.isNot(tok::greater)) {
|
|
|
1021 Lex(FilenameTok);
|
|
|
1022 if (FilenameTok.isOneOf(tok::eod, tok::eof)) {
|
|
|
1023 Diag(FilenameTok.getLocation(), diag::err_expected) << tok::greater;
|
|
|
1024 Diag(Start, diag::note_matching) << tok::less;
|
|
|
1025 return true;
|
|
|
1026 }
|
|
|
1027
|
|
|
1028 End = FilenameTok.getLocation();
|
|
|
1029
|
|
|
1030 // FIXME: Provide code completion for #includes.
|
|
|
1031 if (FilenameTok.is(tok::code_completion)) {
|
|
|
1032 setCodeCompletionReached();
|
|
|
1033 Lex(FilenameTok);
|
|
|
1034 continue;
|
|
|
1035 }
|
|
|
1036
|
|
|
1037 // Append the spelling of this token to the buffer. If there was a space
|
|
|
1038 // before it, add it now.
|
|
|
1039 if (FilenameTok.hasLeadingSpace())
|
|
|
1040 FilenameBuffer.push_back(' ');
|
|
|
1041
|
|
|
1042 // Get the spelling of the token, directly into FilenameBuffer if
|
|
|
1043 // possible.
|
|
|
1044 size_t PreAppendSize = FilenameBuffer.size();
|
|
|
1045 FilenameBuffer.resize(PreAppendSize + FilenameTok.getLength());
|
|
|
1046
|
|
|
1047 const char *BufPtr = &FilenameBuffer[PreAppendSize];
|
|
|
1048 unsigned ActualLen = getSpelling(FilenameTok, BufPtr);
|
|
|
1049
|
|
|
1050 // If the token was spelled somewhere else, copy it into FilenameBuffer.
|
|
|
1051 if (BufPtr != &FilenameBuffer[PreAppendSize])
|
|
|
1052 memcpy(&FilenameBuffer[PreAppendSize], BufPtr, ActualLen);
|
|
|
1053
|
|
|
1054 // Resize FilenameBuffer to the correct size.
|
|
|
1055 if (FilenameTok.getLength() != ActualLen)
|
|
|
1056 FilenameBuffer.resize(PreAppendSize + ActualLen);
|
|
|
1057 }
|
|
|
1058
|
|
|
1059 FilenameTok.startToken();
|
|
|
1060 FilenameTok.setKind(tok::header_name);
|
|
|
1061 FilenameTok.setFlagValue(Token::StartOfLine, StartOfLine);
|
|
|
1062 FilenameTok.setFlagValue(Token::LeadingSpace, LeadingSpace);
|
|
|
1063 FilenameTok.setFlagValue(Token::LeadingEmptyMacro, LeadingEmptyMacro);
|
|
|
1064 CreateString(FilenameBuffer, FilenameTok, Start, End);
|
|
|
1065 } else if (FilenameTok.is(tok::string_literal) && AllowMacroExpansion) {
|
|
|
1066 // Convert a string-literal token of the form " h-char-sequence "
|
|
|
1067 // (produced by macro expansion) into a header-name token.
|
|
|
1068 //
|
|
|
1069 // The rules for header-names don't quite match the rules for
|
|
|
1070 // string-literals, but all the places where they differ result in
|
|
|
1071 // undefined behavior, so we can and do treat them the same.
|
|
|
1072 //
|
|
|
1073 // A string-literal with a prefix or suffix is not translated into a
|
|
|
1074 // header-name. This could theoretically be observable via the C++20
|
|
|
1075 // context-sensitive header-name formation rules.
|
|
|
1076 StringRef Str = getSpelling(FilenameTok, FilenameBuffer);
|
|
|
1077 if (Str.size() >= 2 && Str.front() == '"' && Str.back() == '"')
|
|
|
1078 FilenameTok.setKind(tok::header_name);
|
|
|
1079 }
|
|
|
1080
|
|
|
1081 return false;
|
|
|
1082 }
|
|
|
1083
|
|
|
1084 /// Collect the tokens of a C++20 pp-import-suffix.
|
|
|
1085 void Preprocessor::CollectPpImportSuffix(SmallVectorImpl<Token> &Toks) {
|
|
|
1086 // FIXME: For error recovery, consider recognizing attribute syntax here
|
|
|
1087 // and terminating / diagnosing a missing semicolon if we find anything
|
|
|
1088 // else? (Can we leave that to the parser?)
|
|
|
1089 unsigned BracketDepth = 0;
|
|
|
1090 while (true) {
|
|
|
1091 Toks.emplace_back();
|
|
|
1092 Lex(Toks.back());
|
|
|
1093
|
|
|
1094 switch (Toks.back().getKind()) {
|
|
|
1095 case tok::l_paren: case tok::l_square: case tok::l_brace:
|
|
|
1096 ++BracketDepth;
|
|
|
1097 break;
|
|
|
1098
|
|
|
1099 case tok::r_paren: case tok::r_square: case tok::r_brace:
|
|
|
1100 if (BracketDepth == 0)
|
|
|
1101 return;
|
|
|
1102 --BracketDepth;
|
|
|
1103 break;
|
|
|
1104
|
|
|
1105 case tok::semi:
|
|
|
1106 if (BracketDepth == 0)
|
|
|
1107 return;
|
|
|
1108 break;
|
|
|
1109
|
|
|
1110 case tok::eof:
|
|
|
1111 return;
|
|
|
1112
|
|
|
1113 default:
|
|
|
1114 break;
|
|
|
1115 }
|
|
|
1116 }
|
|
|
1117 }
|
|
|
1118
|
|
|
1119
|
|
|
1120 /// Lex a token following the 'import' contextual keyword.
|
|
|
1121 ///
|
|
|
1122 /// pp-import: [C++20]
|
|
|
1123 /// import header-name pp-import-suffix[opt] ;
|
|
|
1124 /// import header-name-tokens pp-import-suffix[opt] ;
|
|
|
1125 /// [ObjC] @ import module-name ;
|
|
|
1126 /// [Clang] import module-name ;
|
|
|
1127 ///
|
|
|
1128 /// header-name-tokens:
|
|
|
1129 /// string-literal
|
|
|
1130 /// < [any sequence of preprocessing-tokens other than >] >
|
|
|
1131 ///
|
|
|
1132 /// module-name:
|
|
|
1133 /// module-name-qualifier[opt] identifier
|
|
|
1134 ///
|
|
|
1135 /// module-name-qualifier
|
|
|
1136 /// module-name-qualifier[opt] identifier .
|
|
|
1137 ///
|
|
|
1138 /// We respond to a pp-import by importing macros from the named module.
|
|
|
1139 bool Preprocessor::LexAfterModuleImport(Token &Result) {
|
|
|
1140 // Figure out what kind of lexer we actually have.
|
|
|
1141 recomputeCurLexerKind();
|
|
|
1142
|
|
|
1143 // Lex the next token. The header-name lexing rules are used at the start of
|
|
|
1144 // a pp-import.
|
|
|
1145 //
|
|
|
1146 // For now, we only support header-name imports in C++20 mode.
|
|
|
1147 // FIXME: Should we allow this in all language modes that support an import
|
|
|
1148 // declaration as an extension?
|
|
|
1149 if (ModuleImportPath.empty() && getLangOpts().CPlusPlusModules) {
|
|
|
1150 if (LexHeaderName(Result))
|
|
|
1151 return true;
|
|
|
1152 } else {
|
|
|
1153 Lex(Result);
|
|
|
1154 }
|
|
|
1155
|
|
|
1156 // Allocate a holding buffer for a sequence of tokens and introduce it into
|
|
|
1157 // the token stream.
|
|
|
1158 auto EnterTokens = [this](ArrayRef<Token> Toks) {
|
|
|
1159 auto ToksCopy = std::make_unique<Token[]>(Toks.size());
|
|
|
1160 std::copy(Toks.begin(), Toks.end(), ToksCopy.get());
|
|
|
1161 EnterTokenStream(std::move(ToksCopy), Toks.size(),
|
|
|
1162 /*DisableMacroExpansion*/ true, /*IsReinject*/ false);
|
|
|
1163 };
|
|
|
1164
|
|
|
1165 // Check for a header-name.
|
|
|
1166 SmallVector<Token, 32> Suffix;
|
|
|
1167 if (Result.is(tok::header_name)) {
|
|
|
1168 // Enter the header-name token into the token stream; a Lex action cannot
|
|
|
1169 // both return a token and cache tokens (doing so would corrupt the token
|
|
|
1170 // cache if the call to Lex comes from CachingLex / PeekAhead).
|
|
|
1171 Suffix.push_back(Result);
|
|
|
1172
|
|
|
1173 // Consume the pp-import-suffix and expand any macros in it now. We'll add
|
|
|
1174 // it back into the token stream later.
|
|
|
1175 CollectPpImportSuffix(Suffix);
|
|
|
1176 if (Suffix.back().isNot(tok::semi)) {
|
|
|
1177 // This is not a pp-import after all.
|
|
|
1178 EnterTokens(Suffix);
|
|
|
1179 return false;
|
|
|
1180 }
|
|
|
1181
|
|
|
1182 // C++2a [cpp.module]p1:
|
|
|
1183 // The ';' preprocessing-token terminating a pp-import shall not have
|
|
|
1184 // been produced by macro replacement.
|
|
|
1185 SourceLocation SemiLoc = Suffix.back().getLocation();
|
|
|
1186 if (SemiLoc.isMacroID())
|
|
|
1187 Diag(SemiLoc, diag::err_header_import_semi_in_macro);
|
|
|
1188
|
|
|
1189 // Reconstitute the import token.
|
|
|
1190 Token ImportTok;
|
|
|
1191 ImportTok.startToken();
|
|
|
1192 ImportTok.setKind(tok::kw_import);
|
|
|
1193 ImportTok.setLocation(ModuleImportLoc);
|
|
|
1194 ImportTok.setIdentifierInfo(getIdentifierInfo("import"));
|
|
|
1195 ImportTok.setLength(6);
|
|
|
1196
|
|
|
1197 auto Action = HandleHeaderIncludeOrImport(
|
|
|
1198 /*HashLoc*/ SourceLocation(), ImportTok, Suffix.front(), SemiLoc);
|
|
|
1199 switch (Action.Kind) {
|
|
|
1200 case ImportAction::None:
|
|
|
1201 break;
|
|
|
1202
|
|
|
1203 case ImportAction::ModuleBegin:
|
|
|
1204 // Let the parser know we're textually entering the module.
|
|
|
1205 Suffix.emplace_back();
|
|
|
1206 Suffix.back().startToken();
|
|
|
1207 Suffix.back().setKind(tok::annot_module_begin);
|
|
|
1208 Suffix.back().setLocation(SemiLoc);
|
|
|
1209 Suffix.back().setAnnotationEndLoc(SemiLoc);
|
|
|
1210 Suffix.back().setAnnotationValue(Action.ModuleForHeader);
|
|
|
1211 LLVM_FALLTHROUGH;
|
|
|
1212
|
|
|
1213 case ImportAction::ModuleImport:
|
|
|
1214 case ImportAction::SkippedModuleImport:
|
|
|
1215 // We chose to import (or textually enter) the file. Convert the
|
|
|
1216 // header-name token into a header unit annotation token.
|
|
|
1217 Suffix[0].setKind(tok::annot_header_unit);
|
|
|
1218 Suffix[0].setAnnotationEndLoc(Suffix[0].getLocation());
|
|
|
1219 Suffix[0].setAnnotationValue(Action.ModuleForHeader);
|
|
|
1220 // FIXME: Call the moduleImport callback?
|
|
|
1221 break;
|
|
|
1222 case ImportAction::Failure:
|
|
|
1223 assert(TheModuleLoader.HadFatalFailure &&
|
|
|
1224 "This should be an early exit only to a fatal error");
|
|
|
1225 Result.setKind(tok::eof);
|
|
|
1226 CurLexer->cutOffLexing();
|
|
|
1227 EnterTokens(Suffix);
|
|
|
1228 return true;
|
|
|
1229 }
|
|
|
1230
|
|
|
1231 EnterTokens(Suffix);
|
|
|
1232 return false;
|
|
|
1233 }
|
|
|
1234
|
|
|
1235 // The token sequence
|
|
|
1236 //
|
|
|
1237 // import identifier (. identifier)*
|
|
|
1238 //
|
|
|
1239 // indicates a module import directive. We already saw the 'import'
|
|
|
1240 // contextual keyword, so now we're looking for the identifiers.
|
|
|
1241 if (ModuleImportExpectsIdentifier && Result.getKind() == tok::identifier) {
|
|
|
1242 // We expected to see an identifier here, and we did; continue handling
|
|
|
1243 // identifiers.
|
|
|
1244 ModuleImportPath.push_back(std::make_pair(Result.getIdentifierInfo(),
|
|
|
1245 Result.getLocation()));
|
|
|
1246 ModuleImportExpectsIdentifier = false;
|
|
|
1247 CurLexerKind = CLK_LexAfterModuleImport;
|
|
|
1248 return true;
|
|
|
1249 }
|
|
|
1250
|
|
|
1251 // If we're expecting a '.' or a ';', and we got a '.', then wait until we
|
|
|
1252 // see the next identifier. (We can also see a '[[' that begins an
|
|
|
1253 // attribute-specifier-seq here under the C++ Modules TS.)
|
|
|
1254 if (!ModuleImportExpectsIdentifier && Result.getKind() == tok::period) {
|
|
|
1255 ModuleImportExpectsIdentifier = true;
|
|
|
1256 CurLexerKind = CLK_LexAfterModuleImport;
|
|
|
1257 return true;
|
|
|
1258 }
|
|
|
1259
|
|
|
1260 // If we didn't recognize a module name at all, this is not a (valid) import.
|
|
|
1261 if (ModuleImportPath.empty() || Result.is(tok::eof))
|
|
|
1262 return true;
|
|
|
1263
|
|
|
1264 // Consume the pp-import-suffix and expand any macros in it now, if we're not
|
|
|
1265 // at the semicolon already.
|
|
|
1266 SourceLocation SemiLoc = Result.getLocation();
|
|
|
1267 if (Result.isNot(tok::semi)) {
|
|
|
1268 Suffix.push_back(Result);
|
|
|
1269 CollectPpImportSuffix(Suffix);
|
|
|
1270 if (Suffix.back().isNot(tok::semi)) {
|
|
|
1271 // This is not an import after all.
|
|
|
1272 EnterTokens(Suffix);
|
|
|
1273 return false;
|
|
|
1274 }
|
|
|
1275 SemiLoc = Suffix.back().getLocation();
|
|
|
1276 }
|
|
|
1277
|
|
|
1278 // Under the Modules TS, the dot is just part of the module name, and not
|
|
|
1279 // a real hierarchy separator. Flatten such module names now.
|
|
|
1280 //
|
|
|
1281 // FIXME: Is this the right level to be performing this transformation?
|
|
|
1282 std::string FlatModuleName;
|
|
|
1283 if (getLangOpts().ModulesTS || getLangOpts().CPlusPlusModules) {
|
|
|
1284 for (auto &Piece : ModuleImportPath) {
|
|
|
1285 if (!FlatModuleName.empty())
|
|
|
1286 FlatModuleName += ".";
|
|
|
1287 FlatModuleName += Piece.first->getName();
|
|
|
1288 }
|
|
|
1289 SourceLocation FirstPathLoc = ModuleImportPath[0].second;
|
|
|
1290 ModuleImportPath.clear();
|
|
|
1291 ModuleImportPath.push_back(
|
|
|
1292 std::make_pair(getIdentifierInfo(FlatModuleName), FirstPathLoc));
|
|
|
1293 }
|
|
|
1294
|
|
|
1295 Module *Imported = nullptr;
|
|
|
1296 if (getLangOpts().Modules) {
|
|
|
1297 Imported = TheModuleLoader.loadModule(ModuleImportLoc,
|
|
|
1298 ModuleImportPath,
|
|
|
1299 Module::Hidden,
|
|
|
1300 /*IsInclusionDirective=*/false);
|
|
|
1301 if (Imported)
|
|
|
1302 makeModuleVisible(Imported, SemiLoc);
|
|
|
1303 }
|
|
|
1304 if (Callbacks)
|
|
|
1305 Callbacks->moduleImport(ModuleImportLoc, ModuleImportPath, Imported);
|
|
|
1306
|
|
|
1307 if (!Suffix.empty()) {
|
|
|
1308 EnterTokens(Suffix);
|
|
|
1309 return false;
|
|
|
1310 }
|
|
|
1311 return true;
|
|
|
1312 }
|
|
|
1313
|
|
|
1314 void Preprocessor::makeModuleVisible(Module *M, SourceLocation Loc) {
|
|
|
1315 CurSubmoduleState->VisibleModules.setVisible(
|
|
|
1316 M, Loc, [](Module *) {},
|
|
|
1317 [&](ArrayRef<Module *> Path, Module *Conflict, StringRef Message) {
|
|
|
1318 // FIXME: Include the path in the diagnostic.
|
|
|
1319 // FIXME: Include the import location for the conflicting module.
|
|
|
1320 Diag(ModuleImportLoc, diag::warn_module_conflict)
|
|
|
1321 << Path[0]->getFullModuleName()
|
|
|
1322 << Conflict->getFullModuleName()
|
|
|
1323 << Message;
|
|
|
1324 });
|
|
|
1325
|
|
|
1326 // Add this module to the imports list of the currently-built submodule.
|
|
|
1327 if (!BuildingSubmoduleStack.empty() && M != BuildingSubmoduleStack.back().M)
|
|
|
1328 BuildingSubmoduleStack.back().M->Imports.insert(M);
|
|
|
1329 }
|
|
|
1330
|
|
|
1331 bool Preprocessor::FinishLexStringLiteral(Token &Result, std::string &String,
|
|
|
1332 const char *DiagnosticTag,
|
|
|
1333 bool AllowMacroExpansion) {
|
|
|
1334 // We need at least one string literal.
|
|
|
1335 if (Result.isNot(tok::string_literal)) {
|
|
|
1336 Diag(Result, diag::err_expected_string_literal)
|
|
|
1337 << /*Source='in...'*/0 << DiagnosticTag;
|
|
|
1338 return false;
|
|
|
1339 }
|
|
|
1340
|
|
|
1341 // Lex string literal tokens, optionally with macro expansion.
|
|
|
1342 SmallVector<Token, 4> StrToks;
|
|
|
1343 do {
|
|
|
1344 StrToks.push_back(Result);
|
|
|
1345
|
|
|
1346 if (Result.hasUDSuffix())
|
|
|
1347 Diag(Result, diag::err_invalid_string_udl);
|
|
|
1348
|
|
|
1349 if (AllowMacroExpansion)
|
|
|
1350 Lex(Result);
|
|
|
1351 else
|
|
|
1352 LexUnexpandedToken(Result);
|
|
|
1353 } while (Result.is(tok::string_literal));
|
|
|
1354
|
|
|
1355 // Concatenate and parse the strings.
|
|
|
1356 StringLiteralParser Literal(StrToks, *this);
|
|
|
1357 assert(Literal.isAscii() && "Didn't allow wide strings in");
|
|
|
1358
|
|
|
1359 if (Literal.hadError)
|
|
|
1360 return false;
|
|
|
1361
|
|
|
1362 if (Literal.Pascal) {
|
|
|
1363 Diag(StrToks[0].getLocation(), diag::err_expected_string_literal)
|
|
|
1364 << /*Source='in...'*/0 << DiagnosticTag;
|
|
|
1365 return false;
|
|
|
1366 }
|
|
|
1367
|
|
|
1368 String = std::string(Literal.GetString());
|
|
|
1369 return true;
|
|
|
1370 }
|
|
|
1371
|
|
|
1372 bool Preprocessor::parseSimpleIntegerLiteral(Token &Tok, uint64_t &Value) {
|
|
|
1373 assert(Tok.is(tok::numeric_constant));
|
|
|
1374 SmallString<8> IntegerBuffer;
|
|
|
1375 bool NumberInvalid = false;
|
|
|
1376 StringRef Spelling = getSpelling(Tok, IntegerBuffer, &NumberInvalid);
|
|
|
1377 if (NumberInvalid)
|
|
|
1378 return false;
|
|
|
1379 NumericLiteralParser Literal(Spelling, Tok.getLocation(), *this);
|
|
|
1380 if (Literal.hadError || !Literal.isIntegerLiteral() || Literal.hasUDSuffix())
|
|
|
1381 return false;
|
|
|
1382 llvm::APInt APVal(64, 0);
|
|
|
1383 if (Literal.GetIntegerValue(APVal))
|
|
|
1384 return false;
|
|
|
1385 Lex(Tok);
|
|
|
1386 Value = APVal.getLimitedValue();
|
|
|
1387 return true;
|
|
|
1388 }
|
|
|
1389
|
|
|
1390 void Preprocessor::addCommentHandler(CommentHandler *Handler) {
|
|
|
1391 assert(Handler && "NULL comment handler");
|
|
|
1392 assert(llvm::find(CommentHandlers, Handler) == CommentHandlers.end() &&
|
|
|
1393 "Comment handler already registered");
|
|
|
1394 CommentHandlers.push_back(Handler);
|
|
|
1395 }
|
|
|
1396
|
|
|
1397 void Preprocessor::removeCommentHandler(CommentHandler *Handler) {
|
|
|
1398 std::vector<CommentHandler *>::iterator Pos =
|
|
|
1399 llvm::find(CommentHandlers, Handler);
|
|
|
1400 assert(Pos != CommentHandlers.end() && "Comment handler not registered");
|
|
|
1401 CommentHandlers.erase(Pos);
|
|
|
1402 }
|
|
|
1403
|
|
|
1404 bool Preprocessor::HandleComment(Token &result, SourceRange Comment) {
|
|
|
1405 bool AnyPendingTokens = false;
|
|
|
1406 for (std::vector<CommentHandler *>::iterator H = CommentHandlers.begin(),
|
|
|
1407 HEnd = CommentHandlers.end();
|
|
|
1408 H != HEnd; ++H) {
|
|
|
1409 if ((*H)->HandleComment(*this, Comment))
|
|
|
1410 AnyPendingTokens = true;
|
|
|
1411 }
|
|
|
1412 if (!AnyPendingTokens || getCommentRetentionState())
|
|
|
1413 return false;
|
|
|
1414 Lex(result);
|
|
|
1415 return true;
|
|
|
1416 }
|
|
|
1417
|
|
|
1418 ModuleLoader::~ModuleLoader() = default;
|
|
|
1419
|
|
|
1420 CommentHandler::~CommentHandler() = default;
|
|
|
1421
|
|
|
1422 CodeCompletionHandler::~CodeCompletionHandler() = default;
|
|
|
1423
|
|
|
1424 void Preprocessor::createPreprocessingRecord() {
|
|
|
1425 if (Record)
|
|
|
1426 return;
|
|
|
1427
|
|
|
1428 Record = new PreprocessingRecord(getSourceManager());
|
|
|
1429 addPPCallbacks(std::unique_ptr<PPCallbacks>(Record));
|
|
|
1430 }
|
