1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2018 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // ExceptDecl.cpp -- |
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8 | // |
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9 | // Author : Andrew Beach |
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10 | // Created On : Tue Jul 12 15:50:00 2022 |
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11 | // Last Modified By : Andrew Beach |
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12 | // Last Modified On : Mon Jul 18 11:01:00 2022 |
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13 | // Update Count : 0 |
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14 | // |
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15 | |
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16 | #include "ExceptDecl.hpp" |
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17 | |
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18 | #include <sstream> |
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19 | |
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20 | #include "AST/Copy.hpp" |
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21 | #include "AST/Decl.hpp" |
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22 | #include "AST/Pass.hpp" |
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23 | #include "AST/Print.hpp" |
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24 | #include "AST/Type.hpp" |
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25 | #include "Virtual/Tables.hpp" |
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26 | |
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27 | namespace ControlStruct { |
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28 | |
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29 | namespace { |
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30 | |
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31 | std::vector<ast::ptr<ast::Expr>> forallToParams( |
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32 | std::vector<ast::ptr<ast::TypeDecl>> const & forall ) { |
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33 | return map_range<std::vector<ast::ptr<ast::Expr>>>( forall, |
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34 | []( ast::ptr<ast::TypeDecl> const & decl ) { |
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35 | return new ast::TypeExpr( decl->location, |
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36 | new ast::TypeInstType( decl->name, decl->kind ) ); |
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37 | } |
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38 | ); |
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39 | } |
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40 | |
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41 | // A slightly argumented extra constructor, adds a deepCopy. |
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42 | ast::StructInstType * namedStructInstType( |
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43 | std::string const & name, ast::CV::Qualifiers qualifiers, |
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44 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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45 | ast::StructInstType * type = new ast::StructInstType( name, qualifiers ); |
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46 | for ( ast::ptr<ast::Expr> const & param : params ) { |
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47 | type->params.push_back( ast::deepCopy( param ) ); |
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48 | } |
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49 | return type; |
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50 | } |
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51 | |
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52 | ast::StructInstType * createExceptionInstType( |
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53 | std::string const & exceptionName, |
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54 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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55 | return namedStructInstType( exceptionName, ast::CV::Qualifiers(), params ); |
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56 | } |
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57 | |
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58 | ast::StructInstType * createVTableInstType( |
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59 | std::string const & exceptionName, |
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60 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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61 | std::string name = Virtual::vtableTypeName( exceptionName ); |
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62 | return namedStructInstType( name, ast::CV::Const, params ); |
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63 | } |
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64 | |
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65 | ast::StructInstType * createTypeIdInstType( |
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66 | std::string const & exceptionName, |
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67 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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68 | std::string name = Virtual::typeIdType( exceptionName ); |
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69 | return namedStructInstType( name, ast::CV::Const, params ); |
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70 | } |
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71 | |
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72 | ast::FunctionType const * createCopyFuncType( |
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73 | std::string const & exceptionName, |
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74 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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75 | ast::FunctionType * type = new ast::FunctionType( ast::FixedArgs ); |
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76 | type->params.push_back( new ast::PointerType( |
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77 | createExceptionInstType( exceptionName, params ) ) ); |
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78 | type->params.push_back( new ast::PointerType( |
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79 | createExceptionInstType( exceptionName, params ) ) ); |
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80 | type->returns.push_back( new ast::VoidType() ); |
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81 | return type; |
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82 | } |
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83 | |
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84 | ast::FunctionType const * createDtorFuncType( |
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85 | std::string const & exceptionName, |
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86 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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87 | ast::FunctionType * type = new ast::FunctionType( ast::FixedArgs ); |
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88 | type->params.push_back( new ast::ReferenceType( |
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89 | createExceptionInstType( exceptionName, params ) ) ); |
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90 | type->returns.push_back( new ast::VoidType() ); |
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91 | return type; |
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92 | } |
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93 | |
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94 | ast::FunctionType const * createMsgFuncType( |
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95 | std::string const & exceptionName, |
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96 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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97 | ast::FunctionType * type = new ast::FunctionType( ast::FixedArgs ); |
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98 | type->params.push_back( new ast::PointerType( |
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99 | createExceptionInstType( exceptionName, params ) ) ); |
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100 | type->returns.push_back( new ast::PointerType( |
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101 | new ast::BasicType( ast::BasicKind::Char, ast::CV::Const ) ) ); |
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102 | return type; |
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103 | } |
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104 | |
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105 | ast::StructDecl const * createTypeIdStruct( |
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106 | CodeLocation const & location, |
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107 | std::string const & exceptionName, |
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108 | std::vector<ast::ptr<ast::TypeDecl>> const & forallClause ) { |
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109 | ast::StructDecl * decl = new ast::StructDecl( location, |
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110 | Virtual::typeIdType( exceptionName ) ); |
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111 | decl->members.push_back( new ast::ObjectDecl( |
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112 | location, |
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113 | "parent", |
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114 | new ast::PointerType( |
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115 | new ast::StructInstType( "__cfavir_type_info", ast::CV::Const ) ) |
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116 | ) ); |
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117 | decl->body = true; |
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118 | for ( ast::ptr<ast::TypeDecl> const & param : forallClause ) { |
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119 | decl->params.push_back( ast::deepCopy( param ) ); |
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120 | } |
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121 | return decl; |
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122 | } |
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123 | |
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124 | ast::ObjectDecl const * createTypeIdValue( |
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125 | CodeLocation const & location, |
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126 | std::string const & exceptionName, |
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127 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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128 | ast::StructInstType * typeIdType = |
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129 | createTypeIdInstType( exceptionName, params ); |
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130 | return new ast::ObjectDecl( |
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131 | location, |
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132 | Virtual::typeIdName( exceptionName ), |
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133 | typeIdType, |
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134 | new ast::ListInit( location, { |
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135 | new ast::SingleInit( location, |
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136 | new ast::AddressExpr( location, |
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137 | new ast::NameExpr( location, "__cfatid_exception_t" ) ), |
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138 | ast::MaybeConstruct ), |
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139 | }, {}, ast::MaybeConstruct ), |
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140 | ast::Storage::Classes(), |
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141 | ast::Linkage::Cforall, |
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142 | nullptr, |
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143 | { new ast::Attribute( "cfa_linkonce" ) } |
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144 | ); |
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145 | } |
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146 | |
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147 | ast::StructDecl const * createExceptionStructForward( |
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148 | CodeLocation const & location, |
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149 | std::string const & exceptionName, |
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150 | std::vector<ast::ptr<ast::TypeDecl>> const & forall ) { |
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151 | ast::StructDecl * decl = new ast::StructDecl( location, exceptionName ); |
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152 | for ( ast::ptr<ast::TypeDecl> const & param : forall ) { |
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153 | decl->params.push_back( ast::deepCopy( param ) ); |
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154 | } |
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155 | return decl; |
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156 | } |
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157 | |
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158 | ast::StructDecl const * createVirtualTableStruct( |
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159 | CodeLocation const & location, |
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160 | std::string const & exceptionName, |
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161 | std::vector<ast::ptr<ast::TypeDecl>> const & forall, |
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162 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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163 | ast::StructInstType * typeIdType = |
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164 | createTypeIdInstType( exceptionName, params ); |
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165 | ast::ObjectDecl * typeId = new ast::ObjectDecl( |
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166 | location, |
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167 | "__cfavir_typeid", |
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168 | new ast::PointerType( typeIdType ) |
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169 | ); |
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170 | ast::ObjectDecl * size = new ast::ObjectDecl( |
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171 | location, |
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172 | "size", |
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173 | new ast::TypeInstType( "size_t", ast::TypeDecl::Dtype ) |
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174 | ); |
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175 | ast::ObjectDecl * copy = new ast::ObjectDecl( |
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176 | location, |
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177 | "copy", |
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178 | new ast::PointerType( createCopyFuncType( exceptionName, params ) ) |
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179 | ); |
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180 | ast::ObjectDecl * dtor = new ast::ObjectDecl( |
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181 | location, |
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182 | "^?{}", |
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183 | new ast::PointerType( createDtorFuncType( exceptionName, params ) ) |
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184 | ); |
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185 | ast::ObjectDecl * msg = new ast::ObjectDecl( |
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186 | location, |
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187 | "msg", |
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188 | new ast::PointerType( createMsgFuncType( exceptionName, params ) ) |
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189 | ); |
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190 | ast::StructDecl * decl = new ast::StructDecl( |
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191 | location, |
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192 | Virtual::vtableTypeName( exceptionName ) ); |
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193 | decl->members.push_back( typeId ); |
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194 | decl->members.push_back( size ); |
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195 | decl->members.push_back( copy ); |
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196 | decl->members.push_back( dtor ); |
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197 | decl->members.push_back( msg ); |
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198 | decl->body = true; |
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199 | for ( ast::ptr<ast::TypeDecl> const & param : forall ) { |
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200 | decl->params.push_back( param ); |
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201 | } |
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202 | return decl; |
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203 | } |
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204 | |
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205 | ast::StructDecl const * createExceptionStruct( |
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206 | CodeLocation const & location, |
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207 | std::string const & exceptionName, |
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208 | std::vector<ast::ptr<ast::TypeDecl>> const & forallClause, |
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209 | std::vector<ast::ptr<ast::Expr>> const & params, |
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210 | std::vector<ast::ptr<ast::Decl>> const & members ) { |
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211 | ast::StructDecl * decl = new ast::StructDecl( location, exceptionName ); |
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212 | decl->members.push_back( new ast::ObjectDecl( |
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213 | location, |
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214 | "virtual_table", |
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215 | new ast::PointerType( |
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216 | createVTableInstType( exceptionName, params ) ) |
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217 | ) ); |
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218 | for ( ast::ptr<ast::Decl> const & member : members ) { |
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219 | decl->members.push_back( ast::deepCopy( member ) ); |
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220 | } |
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221 | decl->body = true; |
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222 | for ( ast::ptr<ast::TypeDecl> const & param : forallClause ) { |
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223 | decl->params.push_back( ast::deepCopy( param ) ); |
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224 | } |
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225 | return decl; |
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226 | } |
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227 | |
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228 | ast::ObjectDecl const * createExternTypeId( |
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229 | CodeLocation const & location, |
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230 | std::string const & exceptionName, |
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231 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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232 | return new ast::ObjectDecl( |
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233 | location, |
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234 | Virtual::typeIdName( exceptionName ), |
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235 | createVTableInstType( exceptionName, params ), |
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236 | nullptr, |
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237 | ast::Storage::Extern, |
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238 | ast::Linkage::Cforall, |
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239 | nullptr, |
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240 | { new ast::Attribute( "cfa_linkonce" ) } |
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241 | ); |
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242 | } |
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243 | |
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244 | ast::ObjectDecl * createExternVTable( |
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245 | CodeLocation const & location, |
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246 | std::string const & exceptionName, |
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247 | std::vector<ast::ptr<ast::Expr>> const & params, |
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248 | std::string const & tableName ) { |
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249 | return new ast::ObjectDecl( |
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250 | location, |
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251 | tableName, |
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252 | createVTableInstType( exceptionName, params ), |
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253 | nullptr, |
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254 | ast::Storage::Extern, |
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255 | ast::Linkage::Cforall |
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256 | ); |
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257 | } |
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258 | |
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259 | ast::FunctionDecl const * createCopy( |
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260 | CodeLocation const & location, |
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261 | std::string const & exceptionName, |
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262 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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263 | return new ast::FunctionDecl( |
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264 | location, |
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265 | "copy", |
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266 | {/* forall */}, |
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267 | {/* assertions */}, |
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268 | { |
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269 | new ast::ObjectDecl( |
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270 | location, |
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271 | "this", |
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272 | new ast::PointerType( |
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273 | createExceptionInstType( exceptionName, params ) ) |
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274 | ), |
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275 | new ast::ObjectDecl( |
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276 | location, |
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277 | "that", |
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278 | new ast::PointerType( |
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279 | createExceptionInstType( exceptionName, params ) ) |
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280 | ), |
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281 | }, |
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282 | { |
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283 | new ast::ObjectDecl( location, "", new ast::VoidType() ), |
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284 | }, |
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285 | new ast::CompoundStmt( location, { |
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286 | new ast::ExprStmt( location, |
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287 | new ast::UntypedExpr( location, |
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288 | new ast::NameExpr( location, "?=?" ), |
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289 | { |
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290 | new ast::UntypedExpr( location, |
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291 | new ast::NameExpr( location, "*?" ), |
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292 | { new ast::NameExpr( location, "this" ) } ), |
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293 | new ast::UntypedExpr( location, |
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294 | new ast::NameExpr( location, "*?" ), |
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295 | { new ast::NameExpr( location, "that" ) } ), |
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296 | } |
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297 | ) |
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298 | ), |
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299 | } ), |
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300 | ast::Storage::Classes(), |
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301 | ast::Linkage::Cforall, |
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302 | { new ast::Attribute( "cfa_linkonce" ) } |
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303 | ); |
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304 | } |
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305 | |
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306 | ast::FunctionDecl const * createMsg( |
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307 | CodeLocation const & location, |
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308 | std::string const & exceptionName, |
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309 | std::vector<ast::ptr<ast::Expr>> const & params ) { |
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310 | std::stringstream msg; |
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311 | msg << exceptionName; |
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312 | // The forall variant, add parameters to the string. |
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313 | if ( !params.empty() ) { |
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314 | msg << "("; |
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315 | bool first = true; |
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316 | for ( auto & param : params ) { |
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317 | // Seperator Logic: A comma proceeds all but the first object. |
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318 | if ( first ) { |
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319 | first = false; |
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320 | } else { |
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321 | msg << ", "; |
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322 | } |
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323 | |
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324 | ast::print( msg, param.get() ); |
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325 | } |
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326 | msg << ")"; |
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327 | } |
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328 | return new ast::FunctionDecl( |
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329 | location, |
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330 | "msg", |
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331 | {/* forall */}, |
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332 | {/* assertions */}, |
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333 | { |
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334 | new ast::ObjectDecl( |
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335 | location, |
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336 | "this", |
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337 | new ast::PointerType( |
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338 | createExceptionInstType( exceptionName, params ) ) |
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339 | ), |
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340 | }, |
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341 | { |
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342 | new ast::ObjectDecl( |
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343 | location, |
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344 | "", |
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345 | new ast::PointerType( |
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346 | new ast::BasicType( ast::BasicKind::Char, ast::CV::Const ) ) |
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347 | ), |
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348 | }, |
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349 | new ast::CompoundStmt( location, { |
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350 | new ast::ReturnStmt( location, |
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351 | ast::ConstantExpr::from_string( location, msg.str() ) |
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352 | ), |
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353 | } ), |
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354 | ast::Storage::Classes(), |
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355 | ast::Linkage::Cforall, |
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356 | { new ast::Attribute( "cfa_linkonce" ) } |
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357 | ); |
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358 | } |
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359 | |
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360 | ast::ObjectDecl * createVirtualTable( |
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361 | CodeLocation const & location, |
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362 | std::string const & exceptionName, |
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363 | std::vector<ast::ptr<ast::Expr>> const & params, |
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364 | std::string const & tableName ) { |
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365 | ast::StructInstType * sizeType = new ast::StructInstType( exceptionName ); |
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366 | for ( ast::ptr<ast::Expr> const & param : params ) { |
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367 | sizeType->params.push_back( ast::deepCopy( param ) ); |
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368 | } |
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369 | std::vector<ast::ptr<ast::Init>> inits { |
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370 | new ast::SingleInit( location, |
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371 | new ast::AddressExpr( location, |
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372 | new ast::NameExpr( location, |
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373 | Virtual::typeIdName( exceptionName ) ) ) ), |
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374 | new ast::SingleInit( location, |
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375 | new ast::SizeofExpr( location, sizeType ) ), |
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376 | new ast::SingleInit( location, |
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377 | new ast::NameExpr( location, "copy" ) ), |
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378 | new ast::SingleInit( location, |
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379 | new ast::NameExpr( location, "^?{}" ) ), |
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380 | new ast::SingleInit( location, |
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381 | new ast::NameExpr( location, "msg" ) ), |
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382 | }; |
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383 | std::vector<ast::ptr<ast::Designation>> dsigs { |
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384 | new ast::Designation( location, { |
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385 | new ast::NameExpr( location, "__cfavir_typeid" ) } ), |
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386 | new ast::Designation( location, { |
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387 | new ast::NameExpr( location, "size" ) } ), |
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388 | new ast::Designation( location, { |
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389 | new ast::NameExpr( location, "copy" ) } ), |
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390 | new ast::Designation( location, { |
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391 | new ast::NameExpr( location, "^?{}" ) } ), |
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392 | new ast::Designation( location, { |
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393 | new ast::NameExpr( location, "msg" ) } ), |
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394 | }; |
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395 | return new ast::ObjectDecl( |
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396 | location, |
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397 | tableName, |
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398 | createVTableInstType( exceptionName, params ), |
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399 | new ast::ListInit( location, std::move( inits ), std::move( dsigs ) ) |
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400 | ); |
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401 | } |
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402 | |
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403 | struct ExceptDeclCore : public ast::WithDeclsToAdd<> { |
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404 | ast::StructDecl const * transformExcept( ast::StructDecl const * decl ); |
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405 | ast::ObjectDecl const * transformVTable( |
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406 | ast::ObjectDecl const * decl, ast::VTableType const * type ); |
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407 | |
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408 | ast::StructDecl const * postvisit( ast::StructDecl const * decl ) { |
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409 | // Exceptions don't get their own node type, so filter that. |
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410 | if ( ast::AggregateDecl::Exception == decl->kind ) { |
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411 | return transformExcept( decl ); |
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412 | } |
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413 | return decl; |
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414 | } |
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415 | |
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416 | ast::ObjectDecl const * postvisit( ast::ObjectDecl const * decl ) { |
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417 | // Modify remaining objects that have a vtable type. |
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418 | if ( auto * type = decl->type.as<ast::VTableType>() ) { |
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419 | return transformVTable( decl, type ); |
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420 | } |
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421 | return decl; |
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422 | } |
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423 | }; |
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424 | |
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425 | ast::StructDecl const * ExceptDeclCore::transformExcept( |
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426 | ast::StructDecl const * decl ) { |
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427 | CodeLocation const & location = decl->location; |
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428 | std::string const & exceptionName = decl->name; |
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429 | std::vector<ast::ptr<ast::TypeDecl>> const & forall = decl->params; |
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430 | std::vector<ast::ptr<ast::Expr>> params = forallToParams( forall ); |
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431 | std::vector<ast::ptr<ast::Decl>> const & members = decl->members; |
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432 | |
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433 | declsToAddBefore.push_back( |
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434 | createTypeIdStruct( location, exceptionName, forall ) ); |
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435 | if ( forall.empty() ) { |
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436 | // Non-forall variant. |
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437 | declsToAddBefore.push_back( |
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438 | createTypeIdValue( location, exceptionName, params ) ); |
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439 | } |
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440 | declsToAddBefore.push_back( |
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441 | createExceptionStructForward( location, exceptionName, forall ) ); |
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442 | declsToAddBefore.push_back( |
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443 | createVirtualTableStruct( location, exceptionName, forall, params ) ); |
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444 | return createExceptionStruct( location, exceptionName, forall, params, members ); |
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445 | } |
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446 | |
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447 | ast::ObjectDecl const * ExceptDeclCore::transformVTable( |
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448 | ast::ObjectDecl const * decl, ast::VTableType const * type ) { |
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449 | CodeLocation const & location = decl->location; |
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450 | auto base = type->base.strict_as<ast::TypeInstType>(); |
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451 | std::string const & exceptionName = base->name; |
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452 | std::vector<ast::ptr<ast::Expr>> const & params = base->params; |
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453 | std::string const & tableName = decl->name; |
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454 | |
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455 | ast::ObjectDecl * retDecl; |
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456 | if ( decl->storage.is_extern ) { |
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457 | // Unique type-ids are only needed for polymorphic instances. |
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458 | if ( !params.empty() ) { |
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459 | declsToAddBefore.push_back( |
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460 | createExternTypeId( location, exceptionName, params ) ); |
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461 | } |
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462 | retDecl = createExternVTable( location, exceptionName, params, tableName ); |
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463 | } else { |
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464 | // Unique type-ids are only needed for polymorphic instances. |
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465 | if ( !params.empty() ) { |
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466 | declsToAddBefore.push_back( |
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467 | createTypeIdValue( location, exceptionName, params ) ); |
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468 | } |
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469 | declsToAddBefore.push_back( |
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470 | createCopy( location, exceptionName, params ) ); |
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471 | declsToAddBefore.push_back( |
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472 | createMsg( location, exceptionName, params ) ); |
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473 | retDecl = createVirtualTable( |
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474 | location, exceptionName, params, tableName ); |
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475 | } |
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476 | |
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477 | for ( ast::ptr<ast::Attribute> const & attr : decl->attributes ) { |
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478 | retDecl->attributes.push_back( attr ); |
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479 | } |
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480 | |
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481 | return retDecl; |
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482 | } |
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483 | |
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484 | struct VTableCore { |
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485 | ast::StructInstType const * postvisit( ast::VTableType const * type ) { |
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486 | auto inst = type->base.as<ast::BaseInstType>(); |
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487 | |
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488 | std::string vtableName = Virtual::vtableTypeName( inst->name ); |
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489 | |
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490 | auto newType = new ast::StructInstType( vtableName ); |
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491 | for ( ast::ptr<ast::Expr> const & param : inst->params ) { |
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492 | newType->params.push_back( param ); |
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493 | } |
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494 | |
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495 | return newType; |
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496 | } |
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497 | }; |
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498 | |
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499 | } // namespace |
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500 | |
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501 | void translateExcept( ast::TranslationUnit & translationUnit ) { |
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502 | // Can I combine these? |
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503 | // Second pass really only covers what the first has missed. |
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504 | // Maybe if the first one is all previsits and the second all postvisit. |
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505 | ast::Pass<ExceptDeclCore>::run( translationUnit ); |
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506 | ast::Pass<VTableCore>::run( translationUnit ); |
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507 | } |
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508 | |
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509 | } // namespace ControlStruct |
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510 | |
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511 | // Local Variables: // |
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512 | // tab-width: 4 // |
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513 | // mode: c++ // |
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514 | // compile-command: "make install" // |
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515 | // End: // |
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