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annotate sema/AstAction.d @ 77:13eea2c4e60d new_gen

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Now able of --ast-dump-code with Pointer types and also codeGen int* x;
author Anders Johnsen <skabet@gmail.com>
date Fri, 02 May 2008 16:37:13 +0200
parents 381975d76baf
children 81813366ef92
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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));
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26 else
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27 return new Identifier(type.tok);
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28 }
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29
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30
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31 // -- Declarations --
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32 override DeclT actOnDeclarator(ref Id type, ref Id id, ExprT init)
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33 {
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34 Exp exp = cast(Exp)init;
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35 if(type.tok.type == Tok.Struct)
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36 return new StructDecl(new Identifier(id.tok));
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37 else
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38 return new VarDecl(handleType(type), new Identifier(id.tok), exp);
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39 }
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40
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41 override void actOnStructMember(DeclT decl, ref Id type, ref Id name, ExprT init)
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42 {
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43 Exp exp = cast(Exp)init;
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44 StructDecl st = cast(StructDecl)decl;
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45 st.addMember(
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46 new Identifier(type.tok),
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47 new Identifier(name.tok),
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48 exp);
51
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49 }
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50
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51 override ExprT actOnMemberReference(ExprT lhs, Location op, Id member)
55
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52 {
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53 return new MemberReference(cast(Exp)lhs, new Identifier(member.tok));
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54 }
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55
51
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56 override DeclT actOnStartOfFunctionDef(ref Id type, ref Id name)
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57 {
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58 return new FuncDecl(new Identifier(type.tok), new Identifier(name.tok));
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59 }
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60
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61 override void addFuncArg(DeclT func, Id type, Id name)
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62 {
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63 FuncDecl fd = cast(FuncDecl)func;
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64 fd.addParam(new Identifier(type.tok), new Identifier(name.tok));
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65 }
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66
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67 override DeclT actOnEndOfFunction(DeclT func, StmtT stmts)
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68 {
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69 FuncDecl fd = cast(FuncDecl)func;
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70 fd.setBody(cast(CompoundStatement)stmts);
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71 return fd;
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72 }
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73
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74 // -- Statements --
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75 override StmtT actOnCompoundStmt(ref Token l, ref Token r, StmtT[] stmts)
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76 {
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77 Stmt[] statements = cast(Stmt[])stmts;
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78 return new CompoundStatement(statements.dup);
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79 }
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80
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81 override StmtT actOnExprStmt(ExprT exp)
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82 {
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83 return new ExpStmt(cast(Exp)exp);
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84 }
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85
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86 override StmtT actOnReturnStmt(ref Token loc, ExprT exp)
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87 {
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88 Exp e = cast(Exp)exp;
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89 auto res = new ReturnStmt;
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90 res.exp = e;
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91 return res;
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92 }
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93
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94 override StmtT actOnIfStmt(ref Token ifTok, ExprT cond, StmtT thenBody,
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95 ref Token elseTok, StmtT elseBody)
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96 {
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97 Exp c = cast(Exp)cond;
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98 Stmt t = cast(Stmt)thenBody;
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99 Stmt e = cast(Stmt)elseBody;
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100 return new IfStmt(c, t, e);
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101 }
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102
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103 override StmtT actOnWhileStmt(ref Token tok, ExprT cond, StmtT whileBody)
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104 {
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105 Exp c = cast(Exp)cond;
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106 Stmt b = cast(Stmt)whileBody;
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107 return new WhileStmt(c, b);
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108 }
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109
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110 override StmtT actOnDeclStmt(DeclT decl)
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111 {
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112 Decl d = cast(Decl)decl;
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113 return new DeclStmt(d);
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114 }
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115
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116 // -- Expressions --
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117 override ExprT actOnNumericConstant(Token c)
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118 {
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119 return new IntegerLit(c);
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120 }
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121
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122 override ExprT actOnIdentifierExp(Id id)
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123 {
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124 return new Identifier(id.tok);
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125 }
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126
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127 override ExprT actOnBinaryOp(Operator op, ExprT l, ExprT r)
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128 {
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129 Exp left = cast(Exp)l;
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130 Exp right = cast(Exp)r;
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131 if (op == Operator.Assign)
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132 return new AssignExp(left, right);
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133 else
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134 return new BinaryExp(cast(BinaryExp.Operator)op, left, right);
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135 }
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136
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137 override ExprT actOnUnaryOp(Token op, ExprT operand)
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138 {
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139 Exp target = cast(Exp)operand;
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140 // can only be -x for now
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141 return new NegateExp(target);
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142 }
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143
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144 override ExprT actOnCallExpr(ExprT fn, ref Token, ExprT[] args, ref Token)
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145 {
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146 Exp f = cast(Exp)fn;
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147 Exp[] arguments = cast(Exp[])args.dup;
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148 return new CallExp(f, arguments);
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149 }
68
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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150
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
Anders Johnsen <skabet@gmail.com>
parents: 55
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151 override ExprT actOnCastExpr(Id id, ExprT exp)
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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parents: 55
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152 {
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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parents: 55
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153 return new CastExp(new Identifier(id.tok), cast(Exp)exp );
381975d76baf A LOT of bug fixing - also implemented implicit casts. If you do a --ast-dump-code on a target with some algebra of differant types, you should now see the type casts being made. Also, Tests are again back with only switches failing...
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154 }
51
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155 }