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annotate tools/clang/lib/AST/SelectorLocationsKind.cpp @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children c2174574ed3a
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1 //===--- SelectorLocationsKind.cpp - Kind of selector locations -*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // Describes whether the identifier locations for a selector are "standard"
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11 // or not.
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12 //
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13 //===----------------------------------------------------------------------===//
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14
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15 #include "clang/AST/SelectorLocationsKind.h"
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16 #include "clang/AST/Expr.h"
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17
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18 using namespace clang;
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19
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20 static SourceLocation getStandardSelLoc(unsigned Index,
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21 Selector Sel,
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22 bool WithArgSpace,
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23 SourceLocation ArgLoc,
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24 SourceLocation EndLoc) {
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25 unsigned NumSelArgs = Sel.getNumArgs();
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26 if (NumSelArgs == 0) {
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27 assert(Index == 0);
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28 if (EndLoc.isInvalid())
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29 return SourceLocation();
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30 IdentifierInfo *II = Sel.getIdentifierInfoForSlot(0);
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31 unsigned Len = II ? II->getLength() : 0;
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32 return EndLoc.getLocWithOffset(-Len);
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33 }
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34
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35 assert(Index < NumSelArgs);
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36 if (ArgLoc.isInvalid())
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37 return SourceLocation();
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38 IdentifierInfo *II = Sel.getIdentifierInfoForSlot(Index);
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39 unsigned Len = /* selector id */ (II ? II->getLength() : 0) + /* ':' */ 1;
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40 if (WithArgSpace)
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41 ++Len;
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42 return ArgLoc.getLocWithOffset(-Len);
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43 }
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44
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45 namespace {
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46
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47 template <typename T>
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48 SourceLocation getArgLoc(T* Arg);
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49
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50 template <>
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51 SourceLocation getArgLoc<Expr>(Expr *Arg) {
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52 return Arg->getLocStart();
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53 }
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54
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55 template <>
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56 SourceLocation getArgLoc<ParmVarDecl>(ParmVarDecl *Arg) {
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57 SourceLocation Loc = Arg->getLocStart();
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58 if (Loc.isInvalid())
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59 return Loc;
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60 // -1 to point to left paren of the method parameter's type.
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61 return Loc.getLocWithOffset(-1);
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62 }
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63
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64 template <typename T>
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65 SourceLocation getArgLoc(unsigned Index, ArrayRef<T*> Args) {
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66 return Index < Args.size() ? getArgLoc(Args[Index]) : SourceLocation();
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67 }
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68
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69 template <typename T>
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70 SelectorLocationsKind hasStandardSelLocs(Selector Sel,
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71 ArrayRef<SourceLocation> SelLocs,
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72 ArrayRef<T *> Args,
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73 SourceLocation EndLoc) {
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74 // Are selector locations in standard position with no space between args ?
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75 unsigned i;
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76 for (i = 0; i != SelLocs.size(); ++i) {
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77 if (SelLocs[i] != getStandardSelectorLoc(i, Sel, /*WithArgSpace=*/false,
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78 Args, EndLoc))
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79 break;
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80 }
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81 if (i == SelLocs.size())
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82 return SelLoc_StandardNoSpace;
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83
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84 // Are selector locations in standard position with space between args ?
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85 for (i = 0; i != SelLocs.size(); ++i) {
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86 if (SelLocs[i] != getStandardSelectorLoc(i, Sel, /*WithArgSpace=*/true,
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87 Args, EndLoc))
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88 return SelLoc_NonStandard;
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89 }
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90
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91 return SelLoc_StandardWithSpace;
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92 }
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93
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94 } // anonymous namespace
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95
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96 SelectorLocationsKind
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97 clang::hasStandardSelectorLocs(Selector Sel,
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98 ArrayRef<SourceLocation> SelLocs,
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99 ArrayRef<Expr *> Args,
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100 SourceLocation EndLoc) {
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101 return hasStandardSelLocs(Sel, SelLocs, Args, EndLoc);
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102 }
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103
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104 SourceLocation clang::getStandardSelectorLoc(unsigned Index,
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105 Selector Sel,
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106 bool WithArgSpace,
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107 ArrayRef<Expr *> Args,
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108 SourceLocation EndLoc) {
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109 return getStandardSelLoc(Index, Sel, WithArgSpace,
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110 getArgLoc(Index, Args), EndLoc);
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111 }
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112
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113 SelectorLocationsKind
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114 clang::hasStandardSelectorLocs(Selector Sel,
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115 ArrayRef<SourceLocation> SelLocs,
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116 ArrayRef<ParmVarDecl *> Args,
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117 SourceLocation EndLoc) {
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118 return hasStandardSelLocs(Sel, SelLocs, Args, EndLoc);
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119 }
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120
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121 SourceLocation clang::getStandardSelectorLoc(unsigned Index,
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122 Selector Sel,
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123 bool WithArgSpace,
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124 ArrayRef<ParmVarDecl *> Args,
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125 SourceLocation EndLoc) {
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126 return getStandardSelLoc(Index, Sel, WithArgSpace,
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127 getArgLoc(Index, Args), EndLoc);
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128 }