Mercurial > projects > dang
annotate sema/AstAction.d @ 82:06dda301ea61 new_gen
Can declare outside functions and call c-functions
author | Anders Johnsen <skabet@gmail.com> |
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date | Fri, 02 May 2008 19:51:58 +0200 |
parents | 110c7e1c4ca2 |
children | 9e90694f5da0 |
rev | line source |
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1 module sema.AstAction; |
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2 |
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3 import Integer = tango.text.convert.Integer; |
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4 |
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5 import lexer.Token; |
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6 |
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7 import misc.Error; |
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8 |
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9 import ast.Exp, |
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10 ast.Stmt, |
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11 ast.Decl; |
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12 |
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13 public |
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14 import parser.Action; |
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15 |
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16 /** |
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17 This class implements the default actions for Dang, by building up an AST |
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18 with the data needed in a compiler. |
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19 */ |
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20 class AstAction : Action |
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21 { |
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22 Identifier handleType(Id type) |
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23 { |
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24 if(auto t = cast(PointerId)type) |
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25 return new PointerIdentifier(handleType(t.id)); |
81 | 26 if(auto t = cast(ArrayId)type) |
27 return new ArrayIdentifier(handleType(t.id), cast(IntegerLit)t.number); | |
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28 else |
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29 return new Identifier(type.tok); |
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30 } |
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31 |
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32 |
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33 // -- Declarations -- |
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34 override DeclT actOnDeclarator(ref Id type, ref Id id, ExprT init) |
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35 { |
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36 Exp exp = cast(Exp)init; |
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37 if(type.tok.type == Tok.Struct) |
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38 return new StructDecl(new Identifier(id.tok)); |
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39 else |
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40 return new VarDecl(handleType(type), new Identifier(id.tok), exp); |
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41 } |
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42 |
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43 override void actOnStructMember(DeclT decl, ref Id type, ref Id name, ExprT init) |
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44 { |
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45 Exp exp = cast(Exp)init; |
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46 StructDecl st = cast(StructDecl)decl; |
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47 st.addMember( |
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48 new Identifier(type.tok), |
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49 new Identifier(name.tok), |
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50 exp); |
51
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51 } |
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52 |
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53 override ExprT actOnMemberReference(ExprT lhs, Location op, Id member) |
55
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54 { |
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55 return new MemberReference(cast(Exp)lhs, new Identifier(member.tok)); |
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56 } |
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57 |
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58 override DeclT actOnStartOfFunctionDef(ref Id type, ref Id name) |
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59 { |
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60 return new FuncDecl(new Identifier(type.tok), new Identifier(name.tok)); |
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61 } |
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62 |
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63 override void addFuncArg(DeclT func, Id type, Id name) |
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64 { |
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65 FuncDecl fd = cast(FuncDecl)func; |
82
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66 if(name) |
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67 fd.addParam(new Identifier(type.tok), new Identifier(name.tok)); |
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68 else |
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69 fd.addParam(new Identifier(type.tok)); |
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70 } |
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71 |
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72 override DeclT actOnEndOfFunction(DeclT func, StmtT stmts) |
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73 { |
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74 FuncDecl fd = cast(FuncDecl)func; |
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75 fd.setBody(cast(CompoundStatement)stmts); |
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76 return fd; |
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77 } |
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78 |
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79 // -- Statements -- |
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80 override StmtT actOnCompoundStmt(ref Token l, ref Token r, StmtT[] stmts) |
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81 { |
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82 Stmt[] statements = cast(Stmt[])stmts; |
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83 return new CompoundStatement(statements.dup); |
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84 } |
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85 |
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86 override StmtT actOnExprStmt(ExprT exp) |
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87 { |
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88 return new ExpStmt(cast(Exp)exp); |
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89 } |
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90 |
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91 override StmtT actOnReturnStmt(ref Token loc, ExprT exp) |
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92 { |
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93 Exp e = cast(Exp)exp; |
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94 auto res = new ReturnStmt; |
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95 res.exp = e; |
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96 return res; |
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97 } |
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98 |
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99 override StmtT actOnIfStmt(ref Token ifTok, ExprT cond, StmtT thenBody, |
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100 ref Token elseTok, StmtT elseBody) |
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101 { |
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102 Exp c = cast(Exp)cond; |
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103 Stmt t = cast(Stmt)thenBody; |
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104 Stmt e = cast(Stmt)elseBody; |
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105 return new IfStmt(c, t, e); |
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106 } |
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107 |
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108 override StmtT actOnWhileStmt(ref Token tok, ExprT cond, StmtT whileBody) |
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109 { |
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110 Exp c = cast(Exp)cond; |
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111 Stmt b = cast(Stmt)whileBody; |
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112 return new WhileStmt(c, b); |
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113 } |
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114 |
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115 override StmtT actOnDeclStmt(DeclT decl) |
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116 { |
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117 Decl d = cast(Decl)decl; |
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118 return new DeclStmt(d); |
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119 } |
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120 |
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121 // -- Expressions -- |
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122 override ExprT actOnNumericConstant(Token c) |
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123 { |
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124 return new IntegerLit(c); |
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125 } |
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126 |
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127 override ExprT actOnIdentifierExp(Id id) |
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128 { |
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129 return new Identifier(id.tok); |
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130 } |
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131 |
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132 override ExprT actOnBinaryOp(Operator op, ExprT l, ExprT r) |
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133 { |
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134 Exp left = cast(Exp)l; |
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135 Exp right = cast(Exp)r; |
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136 if (op == Operator.Assign) |
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137 return new AssignExp(left, right); |
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138 else |
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139 return new BinaryExp(cast(BinaryExp.Operator)op, left, right); |
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140 } |
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141 |
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142 override ExprT actOnUnaryOp(Token op, ExprT operand) |
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143 { |
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144 Exp target = cast(Exp)operand; |
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145 if (op.type == Tok.Minus) |
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146 return new NegateExp(target); |
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147 if (op.type == Tok.Star) |
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148 return new DerefExp(target); |
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149 assert(0, "Only valid unary expressions are -x and *x"); |
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150 } |
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151 |
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152 override ExprT actOnCallExpr(ExprT fn, ref Token, ExprT[] args, ref Token) |
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153 { |
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154 Exp f = cast(Exp)fn; |
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155 Exp[] arguments = cast(Exp[])args.dup; |
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156 return new CallExp(f, arguments); |
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157 } |
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158 |
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159 override ExprT actOnCastExpr(Id id, ExprT exp) |
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160 { |
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161 return new CastExp(new Identifier(id.tok), cast(Exp)exp ); |
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162 } |
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163 } |