Mercurial > projects > dang
annotate sema/SymbolTableBuilder.d @ 59:1d6f4ad38a91 new_gen
Make most of the tests pass again
Still have two bugs, one is that type conversion has been diabled for
return statements, the other is at line ~540 of CodeGen.d, were the
following error is emitted:
Can't find an implicit conversion between { i32 } and i32
author | Anders Halager <halager@gmail.com> |
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date | Tue, 29 Apr 2008 00:31:56 +0200 |
parents | 4ae365eff712 |
children | 9f8131676242 |
rev | line source |
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1 | 1 module sema.SymbolTableBuilder; |
2 | |
14 | 3 import tango.io.Stdout, |
4 tango.core.Array : find; | |
1 | 5 |
26 | 6 public |
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7 import sema.SymbolTable; |
1 | 8 |
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9 import sema.Visitor, |
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10 basic.SmallArray; |
1 | 11 |
12 class SymbolTableBuilder : Visitor!(void) | |
13 { | |
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14 override void visit(Decl[] decls) |
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15 { |
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16 auto sb = new ScopeBuilder(); |
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17 sb.visit(decls); |
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18 foreach (decl; decls) |
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19 visitDecl(decl); |
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20 } |
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21 |
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22 override void visitFuncDecl(FuncDecl d) |
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23 { |
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24 visitExp(d.type); |
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25 visitExp(d.identifier); |
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26 SmallArray!(DType, 8) arg_types; |
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27 foreach (arg; d.funcArgs) |
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28 { |
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29 visitDecl(arg); |
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30 arg_types ~= d.env.find(arg.identifier).type; |
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31 } |
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32 foreach (stmt; d.statements) |
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33 visitStmt(stmt); |
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34 |
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35 auto func_t = new DFunction(d.identifier); |
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36 func_t.return_type = d.env.findType(d.type); |
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37 func_t.params = arg_types.safe(); |
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38 |
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39 auto sym = d.env.find(d.identifier); |
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40 sym.type = func_t; |
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41 } |
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42 |
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43 override void visitVarDecl(VarDecl d) |
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44 { |
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45 if (d.init) |
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46 visitExp(d.init); |
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47 |
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48 d.env.find(d.identifier).type = typeOf(d.type, d.env); |
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49 visitExp(d.type); |
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50 visitExp(d.identifier); |
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51 } |
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52 |
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53 override void visitStructDecl(StructDecl s) |
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54 { |
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55 DType[char[]] types; |
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56 |
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57 auto st = (cast(DStruct)s.env.types[s.identifier.get]); |
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58 foreach(varDecl ; s.vars) |
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59 { |
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60 st.addMember(typeOf(varDecl.type, varDecl.env), varDecl.identifier.get); |
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61 } |
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62 |
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63 super.visitStructDecl(s); |
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64 } |
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65 |
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66 DType typeOf(Identifier id, Scope sc) |
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67 { |
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68 return sc.findType(id); |
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69 |
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70 /* |
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71 if (auto type = id.get in types) |
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72 return *type; |
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73 DType res = new DType(id); |
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74 types[id.get] = res; |
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75 return res;*/ |
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76 } |
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77 } |
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78 |
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79 class ScopeBuilder : Visitor!(void) |
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80 { |
1 | 81 this() |
82 { | |
83 table ~= new Scope; | |
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84 table[0].types["void"] = DType.Void; |
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85 table[0].types["bool"] = DType.Bool; |
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86 table[0].types["byte"] = DType.Byte; |
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87 table[0].types["ubyte"] = DType.UByte; |
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88 table[0].types["short"] = DType.Short; |
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89 table[0].types["ushort"] = DType.UShort; |
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90 table[0].types["int"] = DType.Int; |
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91 table[0].types["uint"] = DType.UInt; |
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92 table[0].types["long"] = DType.Long; |
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93 table[0].types["ulong"] = DType.ULong; |
1 | 94 } |
95 | |
96 override void visit(Decl[] decls) | |
97 { | |
98 foreach (decl; decls) | |
99 visitDecl(decl); | |
100 } | |
101 | |
102 override void visitDecl(Decl d) | |
103 { | |
104 d.env = current(); | |
105 super.visitDecl(d); | |
106 } | |
107 | |
108 override void visitStmt(Stmt s) | |
109 { | |
110 s.env = current(); | |
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111 s.stmtIndex = s.env.stmtIndex; |
1 | 112 super.visitStmt(s); |
113 } | |
114 | |
115 override void visitExp(Exp e) | |
116 { | |
117 e.env = current(); | |
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118 e.stmtIndex = e.env.stmtIndex; |
1 | 119 super.visitExp(e); |
120 } | |
121 | |
122 override void visitFuncDecl(FuncDecl d) | |
123 { | |
124 auto sym = current().add(d.identifier); | |
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125 auto sc = push(); |
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126 |
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127 visitExp(d.type); |
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128 visitExp(d.identifier); |
1 | 129 d.env = current(); |
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130 sc.parentFunction = d; |
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131 foreach (arg; d.funcArgs) |
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132 visitDecl(arg); |
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133 foreach (stmt; d.statements) |
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134 { |
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135 sc.currentStmtIndex++; |
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136 visitStmt(stmt); |
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137 } |
14 | 138 pop(sc); |
1 | 139 } |
140 | |
141 override void visitVarDecl(VarDecl d) | |
142 { | |
24 | 143 if (d.init) |
144 visitExp(d.init); | |
145 | |
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146 if (need_push > 0 && current().parentFunction !is null) { |
24 | 147 push(); |
148 --need_push; | |
149 } | |
150 | |
1 | 151 auto sc = current(); |
152 auto sym = sc.add(d.identifier); | |
24 | 153 d.env = sc; |
154 visitExp(d.type); | |
155 visitExp(d.identifier); | |
1 | 156 } |
157 | |
22 | 158 override void visitStructDecl(StructDecl s) |
159 { | |
160 auto sc = current(); | |
161 auto sym = sc.add(s.identifier); | |
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162 s.env = sc; |
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163 auto type = new DStruct(s.identifier); |
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164 |
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165 |
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166 sc.types[s.identifier.get] = type; |
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167 |
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168 sc = push(); |
22 | 169 super.visitStructDecl(s); |
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170 pop(sc); |
22 | 171 } |
172 | |
14 | 173 override void visitDeclStmt(DeclStmt d) |
174 { | |
24 | 175 ++need_push; |
14 | 176 super.visitDeclStmt(d); |
177 } | |
24 | 178 private uint need_push = 0; |
14 | 179 |
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180 override void visitIfStmt(IfStmt s) |
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181 { |
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182 s.env = current(); |
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183 visitExp(s.cond); |
14 | 184 auto sc = push(); |
45 | 185 visitStmt(s.then_body); |
14 | 186 pop(sc); |
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187 |
45 | 188 if (s.else_body !is null) |
189 { | |
190 sc = push(); | |
191 visitStmt(s.else_body); | |
192 pop(sc); | |
193 } | |
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194 } |
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195 |
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196 override void visitWhileStmt(WhileStmt s) |
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197 { |
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198 s.env = current(); |
14 | 199 auto sc = push(); |
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200 super.visitWhileStmt(s); |
14 | 201 pop(sc); |
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202 } |
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203 |
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204 override void visitCompoundStmt(CompoundStatement s) |
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205 { |
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206 s.env = current(); |
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207 auto sc = push(); |
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208 super.visitCompoundStmt(s); |
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209 pop(sc); |
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210 } |
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211 |
1 | 212 private: |
213 Scope[] table; | |
214 | |
14 | 215 Scope push() |
1 | 216 { |
14 | 217 auto sc = new Scope(current()); |
218 table ~= sc; | |
219 return sc; | |
1 | 220 } |
221 | |
14 | 222 Scope pop(Scope sc = null) |
1 | 223 { |
14 | 224 if (sc !is null) |
225 { | |
226 table.length = table.find(sc); | |
227 return sc; | |
228 } | |
229 | |
1 | 230 auto res = table[$ - 1]; |
231 table.length = table.length - 1; | |
232 return res; | |
233 } | |
234 | |
235 Scope current() | |
236 { | |
237 return table[$ - 1]; | |
238 } | |
239 } | |
240 |