Mercurial > projects > ddmd
annotate dmd/CompoundStatement.d @ 182:b64060ab22df
Now compileable with dmd2.050
| author | korDen |
|---|---|
| date | Sat, 30 Oct 2010 05:05:32 +0400 |
| parents | e3afd1303184 |
| children | b0d41ff5e0df |
| rev | line source |
|---|---|
| 0 | 1 module dmd.CompoundStatement; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.Loc; |
| 5 import dmd.Statement; | |
| 6 import dmd.Array; | |
| 7 import dmd.TryCatchStatement; | |
| 8 import dmd.TryFinallyStatement; | |
| 9 import dmd.Catch; | |
| 10 import dmd.ScopeStatement; | |
| 11 import dmd.Identifier; | |
| 12 import dmd.Lexer; | |
| 13 import dmd.ThrowStatement; | |
| 14 import dmd.IdentifierExp; | |
| 15 import dmd.Scope; | |
| 16 import dmd.OutBuffer; | |
| 17 import dmd.HdrGenState; | |
| 18 import dmd.ArrayTypes; | |
| 19 import dmd.ReturnStatement; | |
| 20 import dmd.Expression; | |
| 21 import dmd.InterState; | |
| 22 import dmd.InlineDoState; | |
| 23 import dmd.InlineCostState; | |
| 24 import dmd.InlineScanState; | |
| 25 import dmd.IfStatement; | |
| 26 import dmd.IRState; | |
| 27 import dmd.BE; | |
| 28 import dmd.Util; | |
| 29 | |
| 30 class CompoundStatement : Statement | |
| 31 { | |
| 32 Statements statements; | |
| 33 | |
| 34 this(Loc loc, Statements s) | |
| 35 { | |
| 178 | 36 register(); |
| 0 | 37 super(loc); |
| 38 statements = s; | |
| 39 } | |
| 40 | |
| 41 this(Loc loc, Statement s1, Statement s2) | |
| 42 { | |
| 178 | 43 register(); |
| 0 | 44 super(loc); |
| 45 | |
| 46 statements = new Statements(); | |
| 47 statements.reserve(2); | |
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48 statements.push(s1); |
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49 statements.push(s2); |
| 0 | 50 } |
| 51 | |
| 72 | 52 override Statement syntaxCopy() |
| 0 | 53 { |
| 54 Statements a = new Statements(); | |
| 55 a.setDim(statements.dim); | |
| 56 | |
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57 foreach (size_t i, Statement s; statements) |
| 0 | 58 { |
| 59 if (s) | |
| 60 s = s.syntaxCopy(); | |
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61 a[i] = s; |
| 0 | 62 } |
| 63 | |
| 64 return new CompoundStatement(loc, a); | |
| 65 } | |
| 66 | |
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67 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 68 { |
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69 foreach (s; statements) |
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70 { |
| 177 | 71 if (s) |
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72 s.toCBuffer(buf, hgs); |
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73 } |
| 0 | 74 } |
| 75 | |
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76 override Statement semantic(Scope sc) |
| 0 | 77 { |
| 78 Statement s; | |
| 79 | |
| 80 //printf("CompoundStatement.semantic(this = %p, sc = %p)\n", this, sc); | |
| 81 | |
| 82 for (size_t i = 0; i < statements.dim; ) | |
| 83 { | |
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84 s = statements[i]; |
| 0 | 85 if (s) |
| 86 { | |
| 87 Statements a = s.flatten(sc); | |
| 88 | |
| 89 if (a) | |
| 90 { | |
| 91 statements.remove(i); | |
| 92 statements.insert(i, a); | |
| 93 continue; | |
| 94 } | |
| 27 | 95 |
| 96 s = s.semantic(sc); | |
| 0 | 97 |
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98 statements[i] = s; |
| 0 | 99 if (s) |
| 100 { | |
| 101 Statement sentry; | |
| 102 Statement sexception; | |
| 103 Statement sfinally; | |
| 104 | |
| 105 s.scopeCode(sc, &sentry, &sexception, &sfinally); | |
| 106 if (sentry) | |
| 107 { | |
| 108 sentry = sentry.semantic(sc); | |
| 109 if (s.isDeclarationStatement()) | |
| 110 { | |
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111 statements.insert(i, sentry); |
| 0 | 112 i++; |
| 113 } | |
| 114 else | |
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115 statements[i] = sentry; |
| 0 | 116 } |
| 117 if (sexception) | |
| 118 { | |
| 119 if (i + 1 == statements.dim && !sfinally) | |
| 120 { | |
| 121 static if (true) { | |
| 122 sexception = sexception.semantic(sc); | |
| 123 } else { | |
| 124 statements.push(sexception); | |
| 125 if (sfinally) | |
| 126 // Assume sexception does not throw | |
| 127 statements.push(sfinally); | |
| 128 } | |
| 129 } | |
| 130 else | |
| 131 { | |
| 132 /* Rewrite: | |
| 133 * s; s1; s2; | |
| 134 * As: | |
| 135 * s; | |
| 136 * try { s1; s2; } | |
| 137 * catch (Object __o) | |
| 138 * { sexception; throw __o; } | |
| 139 */ | |
| 140 Statement body_; | |
| 141 Statements aa = new Statements(); | |
| 142 | |
| 143 for (int j = i + 1; j < statements.dim; j++) | |
| 144 { | |
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145 aa.push(statements[j]); |
| 0 | 146 } |
| 147 body_ = new CompoundStatement(Loc(0), aa); | |
| 148 body_ = new ScopeStatement(Loc(0), body_); | |
| 149 | |
| 150 Identifier id = Lexer.uniqueId("__o"); | |
| 151 | |
| 152 Statement handler = new ThrowStatement(Loc(0), new IdentifierExp(Loc(0), id)); | |
| 153 handler = new CompoundStatement(Loc(0), sexception, handler); | |
| 154 | |
| 155 Array catches = new Array(); | |
| 156 Catch ctch = new Catch(Loc(0), null, id, handler); | |
| 157 catches.push(cast(void*)ctch); | |
| 158 s = new TryCatchStatement(Loc(0), body_, catches); | |
| 159 | |
| 160 if (sfinally) | |
| 161 s = new TryFinallyStatement(Loc(0), s, sfinally); | |
| 162 s = s.semantic(sc); | |
| 163 statements.setDim(i + 1); | |
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164 statements.push(s); |
| 0 | 165 break; |
| 166 } | |
| 167 } | |
| 168 else if (sfinally) | |
| 169 { | |
| 170 if (0 && i + 1 == statements.dim) | |
| 171 { | |
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172 statements.push(sfinally); |
| 0 | 173 } |
| 174 else | |
| 175 { | |
| 176 /* Rewrite: | |
| 177 * s; s1; s2; | |
| 178 * As: | |
| 179 * s; try { s1; s2; } finally { sfinally; } | |
| 180 */ | |
| 181 Statement body_; | |
| 182 Statements aa = new Statements(); | |
| 183 | |
| 184 for (int j = i + 1; j < statements.dim; j++) | |
| 185 { | |
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186 aa.push(statements[j]); |
| 0 | 187 } |
| 188 body_ = new CompoundStatement(Loc(0), aa); | |
| 189 s = new TryFinallyStatement(Loc(0), body_, sfinally); | |
| 190 s = s.semantic(sc); | |
| 191 statements.setDim(i + 1); | |
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192 statements.push(s); |
| 0 | 193 break; |
| 194 } | |
| 195 } | |
| 196 } | |
| 197 } | |
| 198 i++; | |
| 199 } | |
| 200 if (statements.dim == 1) | |
| 201 { | |
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202 return statements[0]; |
| 0 | 203 } |
| 204 return this; | |
| 205 } | |
| 206 | |
| 72 | 207 override bool usesEH() |
| 0 | 208 { |
| 123 | 209 foreach (Statement s; statements) |
| 210 { | |
| 211 if (s && s.usesEH()) | |
| 212 return true; | |
| 213 } | |
| 214 | |
| 215 return false; | |
| 0 | 216 } |
| 217 | |
| 72 | 218 override BE blockExit() |
| 0 | 219 { |
| 220 //printf("CompoundStatement::blockExit(%p) %d\n", this, statements->dim); | |
| 221 BE result = BE.BEfallthru; | |
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222 foreach (s; statements) |
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223 { |
| 0 | 224 if (s) |
| 225 { | |
| 226 //printf("result = x%x\n", result); | |
| 227 //printf("%s\n", s->toChars()); | |
| 228 if (!(result & BE.BEfallthru) && !s.comeFrom()) | |
| 229 { | |
| 79 | 230 if (s.blockExit() != BE.BEhalt && !s.isEmpty()) |
| 0 | 231 s.warning("statement is not reachable"); |
| 232 } | |
| 79 | 233 else |
| 234 { | |
| 235 result &= ~BE.BEfallthru; | |
| 236 result |= s.blockExit(); | |
| 237 } | |
| 0 | 238 } |
| 239 } | |
| 240 | |
| 241 return result; | |
| 242 } | |
| 243 | |
| 72 | 244 override bool comeFrom() |
| 0 | 245 { |
| 246 assert(false); | |
| 247 } | |
| 248 | |
| 72 | 249 override bool isEmpty() |
| 0 | 250 { |
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251 foreach (s; statements) |
| 0 | 252 { |
| 253 if (s && !s.isEmpty()) | |
| 254 return false; | |
| 255 } | |
| 256 return true; | |
| 257 } | |
| 258 | |
| 72 | 259 override Statements flatten(Scope sc) |
| 0 | 260 { |
| 261 return statements; | |
| 262 } | |
| 263 | |
| 72 | 264 override ReturnStatement isReturnStatement() |
| 0 | 265 { |
| 266 ReturnStatement rs = null; | |
| 267 | |
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268 foreach(s; statements) |
| 0 | 269 { |
| 270 if (s) | |
| 271 { | |
| 272 rs = s.isReturnStatement(); | |
| 273 if (rs) | |
| 274 break; | |
| 275 } | |
| 276 } | |
| 277 return rs; | |
| 278 } | |
| 279 | |
| 72 | 280 override Expression interpret(InterState istate) |
| 0 | 281 { |
| 63 | 282 Expression e = null; |
| 283 | |
| 284 version (LOG) { | |
| 285 printf("CompoundStatement.interpret()\n"); | |
| 286 } | |
| 287 if (istate.start == this) | |
| 288 istate.start = null; | |
| 289 if (statements) | |
| 290 { | |
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291 foreach(s; statements) |
| 63 | 292 { |
| 293 if (s) | |
| 294 { | |
| 295 e = s.interpret(istate); | |
| 296 if (e) | |
| 297 break; | |
| 298 } | |
| 299 } | |
| 300 } | |
| 301 version (LOG) { | |
| 302 printf("-CompoundStatement.interpret() %p\n", e); | |
| 303 } | |
| 304 return e; | |
| 0 | 305 } |
| 306 | |
| 72 | 307 override int inlineCost(InlineCostState* ics) |
| 0 | 308 { |
| 309 int cost = 0; | |
| 310 | |
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311 foreach(s; statements) |
| 0 | 312 { |
| 313 if (s) | |
| 314 { | |
| 315 cost += s.inlineCost(ics); | |
| 316 if (cost >= COST_MAX) | |
| 317 break; | |
| 318 } | |
| 319 } | |
| 320 | |
| 321 return cost; | |
| 322 } | |
| 323 | |
| 72 | 324 override Expression doInline(InlineDoState ids) |
| 0 | 325 { |
| 326 Expression e = null; | |
| 327 | |
| 328 //printf("CompoundStatement.doInline() %d\n", statements.dim); | |
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329 foreach(s; statements) |
| 0 | 330 { |
| 331 if (s) | |
| 332 { | |
| 333 Expression e2 = s.doInline(ids); | |
| 334 e = Expression.combine(e, e2); | |
| 335 if (s.isReturnStatement()) | |
| 336 break; | |
| 337 | |
| 338 /* Check for: | |
| 339 * if (condition) | |
| 340 * return exp1; | |
| 341 * else | |
| 342 * return exp2; | |
| 343 */ | |
| 344 IfStatement ifs = s.isIfStatement(); | |
| 345 if (ifs && ifs.elsebody && ifs.ifbody && | |
| 346 ifs.ifbody.isReturnStatement() && | |
| 347 ifs.elsebody.isReturnStatement() | |
| 348 ) | |
| 349 break; | |
| 350 } | |
| 351 } | |
| 352 return e; | |
| 353 } | |
| 354 | |
| 72 | 355 override Statement inlineScan(InlineScanState* iss) |
| 0 | 356 { |
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357 foreach(ref Statement s; statements) |
| 0 | 358 { |
| 359 if (s) | |
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360 s = s.inlineScan(iss); |
| 0 | 361 } |
| 362 | |
| 363 return this; | |
| 364 } | |
| 365 | |
| 72 | 366 override void toIR(IRState* irs) |
| 0 | 367 { |
| 368 if (statements) | |
| 369 { | |
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370 foreach(s; statements) |
| 0 | 371 { |
| 372 if (s !is null) | |
| 373 { | |
| 174 | 374 //writeln(s.classinfo.name); |
| 0 | 375 s.toIR(irs); |
| 376 } | |
| 377 } | |
| 378 } | |
| 379 } | |
| 380 | |
| 72 | 381 override CompoundStatement isCompoundStatement() { return this; } |
| 382 } |