Internally these would treat the cast same as a normal conversion from int[7] to int[], which allows code at CTFE to erroneously succeed where it would raise a SEGV at run-time.
ibuclaw
| 1 |
/**
|
|
| 2 |
* Performs the semantic3 stage, which deals with function bodies.
|
|
| 3 |
*
|
|
| 4 |
* Copyright: Copyright (C) 1999-2020 by The D Language Foundation, All Rights Reserved
|
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| 5 |
* Authors: $(LINK2 http://www.digitalmars.com, Walter Bright)
|
|
| 6 |
* License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
|
|
| 7 |
* Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/semantic3.d, _semantic3.d)
|
|
| 8 |
* Documentation: https://dlang.org/phobos/dmd_semantic3.html
|
|
| 9 |
* Coverage: https://codecov.io/gh/dlang/dmd/src/master/src/dmd/semantic3.d
|
|
| 10 |
*/
|
|
| 11 |
|
|
| 12 |
module dmd.semantic3; |
|
| 13 |
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|
| 14 |
import core.stdc.stdio; |
|
| 15 |
import core.stdc.string; |
|
| 16 |
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| 17 |
import dmd.aggregate; |
|
| 18 |
import dmd.aliasthis; |
|
| 19 |
import dmd.arraytypes; |
|
| 20 |
import dmd.astcodegen; |
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| 21 |
import dmd.attrib; |
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| 22 |
import dmd.blockexit; |
|
| 23 |
import dmd.clone; |
|
| 24 |
import dmd.ctorflow; |
|
| 25 |
import dmd.dcast; |
|
| 26 |
import dmd.dclass; |
|
| 27 |
import dmd.declaration; |
|
| 28 |
import dmd.denum; |
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| 29 |
import dmd.dimport; |
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| 30 |
import dmd.dinterpret; |
|
| 31 |
import dmd.dmodule; |
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| 32 |
import dmd.dscope; |
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| 33 |
import dmd.dstruct; |
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| 34 |
import dmd.dsymbol; |
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| 35 |
import dmd.dsymbolsem; |
|
| 36 |
import dmd.dtemplate; |
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| 37 |
import dmd.dversion; |
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| 38 |
import dmd.errors; |
|
| 39 |
import dmd.escape; |
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| 40 |
import dmd.expression; |
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| 41 |
import dmd.expressionsem; |
|
| 42 |
import dmd.func; |
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| 43 |
import dmd.globals; |
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| 44 |
import dmd.id; |
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| 45 |
import dmd.identifier; |
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| 46 |
import dmd.init; |
|
| 47 |
import dmd.initsem; |
|
| 48 |
import dmd.hdrgen; |
|
| 49 |
import dmd.mtype; |
|
| 50 |
import dmd.nogc; |
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| 51 |
import dmd.nspace; |
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| 52 |
import dmd.ob; |
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| 53 |
import dmd.objc; |
|
| 54 |
import dmd.opover; |
|
| 55 |
import dmd.parse; |
|
| 56 |
import dmd.root.filename; |
|
| 57 |
import dmd.root.outbuffer; |
|
| 58 |
import dmd.root.rmem; |
|
| 59 |
import dmd.root.rootobject; |
|
| 60 |
import dmd.sideeffect; |
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| 61 |
import dmd.statementsem; |
|
| 62 |
import dmd.staticassert; |
|
| 63 |
import dmd.tokens; |
|
| 64 |
import dmd.utf; |
|
| 65 |
import dmd.semantic2; |
|
| 66 |
import dmd.statement; |
|
| 67 |
import dmd.target; |
|
| 68 |
import dmd.templateparamsem; |
|
| 69 |
import dmd.typesem; |
|
| 70 |
import dmd.visitor; |
|
| 71 |
|
|
| 72 |
enum LOG = false; |
|
| 73 |
|
|
| 74 |
|
|
| 75 |
/*************************************
|
|
| 76 |
* Does semantic analysis on function bodies.
|
|
| 77 |
*/
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|
| 78 |
extern(C++) void semantic3(Dsymbol dsym, Scope* sc) |
|
| 79 |
{
|
|
| 80 | 1 |
scope v = new Semantic3Visitor(sc); |
| 81 | 1 |
dsym.accept(v); |
| 82 |
}
|
|
| 83 |
|
|
| 84 |
private extern(C++) final class Semantic3Visitor : Visitor |
|
| 85 |
{
|
|
| 86 |
alias visit = Visitor.visit; |
|
| 87 |
|
|
| 88 |
Scope* sc; |
|
| 89 | 1 |
this(Scope* sc) |
| 90 |
{
|
|
| 91 | 1 |
this.sc = sc; |
| 92 |
}
|
|
| 93 |
|
|
| 94 |
override void visit(Dsymbol) {} |
|
| 95 |
|
|
| 96 |
override void visit(TemplateInstance tempinst) |
|
| 97 |
{
|
|
| 98 |
static if (LOG) |
|
| 99 |
{
|
|
| 100 |
printf("TemplateInstance.semantic3('%s'), semanticRun = %d\n", tempinst.toChars(), tempinst.semanticRun); |
|
| 101 |
}
|
|
| 102 |
//if (toChars()[0] == 'D') *(char*)0=0;
|
|
| 103 | 1 |
if (tempinst.semanticRun >= PASS.semantic3) |
| 104 | 1 |
return; |
| 105 | 1 |
tempinst.semanticRun = PASS.semantic3; |
| 106 | 1 |
if (!tempinst.errors && tempinst.members) |
| 107 |
{
|
|
| 108 | 1 |
TemplateDeclaration tempdecl = tempinst.tempdecl.isTemplateDeclaration(); |
| 109 | 1 |
assert(tempdecl); |
| 110 |
|
|
| 111 | 1 |
sc = tempdecl._scope; |
| 112 | 1 |
sc = sc.push(tempinst.argsym); |
| 113 | 1 |
sc = sc.push(tempinst); |
| 114 | 1 |
sc.tinst = tempinst; |
| 115 | 1 |
sc.minst = tempinst.minst; |
| 116 |
|
|
| 117 | 1 |
int needGagging = (tempinst.gagged && !global.gag); |
| 118 | 1 |
uint olderrors = global.errors; |
| 119 | 1 |
int oldGaggedErrors = -1; // dead-store to prevent spurious warning |
| 120 |
/* If this is a gagged instantiation, gag errors.
|
|
| 121 |
* Future optimisation: If the results are actually needed, errors
|
|
| 122 |
* would already be gagged, so we don't really need to run semantic
|
|
| 123 |
* on the members.
|
|
| 124 |
*/
|
|
| 125 | 1 |
if (needGagging) |
| 126 | 1 |
oldGaggedErrors = global.startGagging(); |
| 127 |
|
|
| 128 | 1 |
for (size_t i = 0; i < tempinst.members.dim; i++) |
| 129 |
{
|
|
| 130 | 1 |
Dsymbol s = (*tempinst.members)[i]; |
| 131 | 1 |
s.semantic3(sc); |
| 132 | 1 |
if (tempinst.gagged && global.errors != olderrors) |
| 133 | 1 |
break; |
| 134 |
}
|
|
| 135 |
|
|
| 136 | 1 |
if (global.errors != olderrors) |
| 137 |
{
|
|
| 138 | 1 |
if (!tempinst.errors) |
| 139 |
{
|
|
| 140 | 1 |
if (!tempdecl.literal) |
| 141 | 1 |
tempinst.error(tempinst.loc, "error instantiating"); |
| 142 | 1 |
if (tempinst.tinst) |
| 143 | 1 |
tempinst.tinst.printInstantiationTrace(); |
| 144 |
}
|
|
| 145 | 1 |
tempinst.errors = true; |
| 146 |
}
|
|
| 147 | 1 |
if (needGagging) |
| 148 | 1 |
global.endGagging(oldGaggedErrors); |
| 149 |
|
|
| 150 | 1 |
sc = sc.pop(); |
| 151 | 1 |
sc.pop(); |
| 152 |
}
|
|
| 153 |
}
|
|
| 154 |
|
|
| 155 |
override void visit(TemplateMixin tmix) |
|
| 156 |
{
|
|
| 157 | 1 |
if (tmix.semanticRun >= PASS.semantic3) |
| 158 | 1 |
return; |
| 159 | 1 |
tmix.semanticRun = PASS.semantic3; |
| 160 |
static if (LOG) |
|
| 161 |
{
|
|
| 162 |
printf("TemplateMixin.semantic3('%s')\n", tmix.toChars()); |
|
| 163 |
}
|
|
| 164 | 1 |
if (tmix.members) |
| 165 |
{
|
|
| 166 | 1 |
sc = sc.push(tmix.argsym); |
| 167 | 1 |
sc = sc.push(tmix); |
| 168 | 1 |
for (size_t i = 0; i < tmix.members.dim; i++) |
| 169 |
{
|
|
| 170 | 1 |
Dsymbol s = (*tmix.members)[i]; |
| 171 | 1 |
s.semantic3(sc); |
| 172 |
}
|
|
| 173 | 1 |
sc = sc.pop(); |
| 174 | 1 |
sc.pop(); |
| 175 |
}
|
|
| 176 |
}
|
|
| 177 |
|
|
| 178 |
override void visit(Module mod) |
|
| 179 |
{
|
|
| 180 |
//printf("Module::semantic3('%s'): parent = %p\n", toChars(), parent);
|
|
| 181 | 1 |
if (mod.semanticRun != PASS.semantic2done) |
| 182 |
return; |
|
| 183 | 1 |
mod.semanticRun = PASS.semantic3; |
| 184 |
// Note that modules get their own scope, from scratch.
|
|
| 185 |
// This is so regardless of where in the syntax a module
|
|
| 186 |
// gets imported, it is unaffected by context.
|
|
| 187 | 1 |
Scope* sc = Scope.createGlobal(mod); // create root scope |
| 188 |
//printf("Module = %p\n", sc.scopesym);
|
|
| 189 |
// Pass 3 semantic routines: do initializers and function bodies
|
|
| 190 | 1 |
for (size_t i = 0; i < mod.members.dim; i++) |
| 191 |
{
|
|
| 192 | 1 |
Dsymbol s = (*mod.members)[i]; |
| 193 |
//printf("Module %s: %s.semantic3()\n", toChars(), s.toChars());
|
|
| 194 | 1 |
s.semantic3(sc); |
| 195 |
|
|
| 196 | 1 |
mod.runDeferredSemantic2(); |
| 197 |
}
|
|
| 198 | 1 |
if (mod.userAttribDecl) |
| 199 |
{
|
|
| 200 | 1 |
mod.userAttribDecl.semantic3(sc); |
| 201 |
}
|
|
| 202 | 1 |
sc = sc.pop(); |
| 203 | 1 |
sc.pop(); |
| 204 | 1 |
mod.semanticRun = PASS.semantic3done; |
| 205 |
}
|
|
| 206 |
|
|
| 207 |
override void visit(FuncDeclaration funcdecl) |
|
| 208 |
{
|
|
| 209 |
/* Determine if function should add `return 0;`
|
|
| 210 |
*/
|
|
| 211 |
bool addReturn0() |
|
| 212 |
{
|
|
| 213 | 1 |
TypeFunction f = cast(TypeFunction)funcdecl.type; |
| 214 |
|
|
| 215 | 1 |
return f.next.ty == Tvoid && |
| 216 | 1 |
(funcdecl.isMain() || global.params.betterC && funcdecl.isCMain()); |
| 217 |
}
|
|
| 218 |
|
|
| 219 | 1 |
VarDeclaration _arguments = null; |
| 220 |
|
|
| 221 | 1 |
if (!funcdecl.parent) |
| 222 |
{
|
|
| 223 |
if (global.errors) |
|
| 224 |
return; |
|
| 225 |
//printf("FuncDeclaration::semantic3(%s '%s', sc = %p)\n", kind(), toChars(), sc);
|
|
| 226 |
assert(0); |
|
| 227 |
}
|
|
| 228 | 1 |
if (funcdecl.errors || isError(funcdecl.parent)) |
| 229 |
{
|
|
| 230 | 1 |
funcdecl.errors = true; |
| 231 | 1 |
return; |
| 232 |
}
|
|
| 233 |
//printf("FuncDeclaration::semantic3('%s.%s', %p, sc = %p, loc = %s)\n", funcdecl.parent.toChars(), funcdecl.toChars(), funcdecl, sc, funcdecl.loc.toChars());
|
|
| 234 |
//fflush(stdout);
|
|
| 235 |
//printf("storage class = x%x %x\n", sc.stc, storage_class);
|
|
| 236 |
//{ static int x; if (++x == 2) *(char*)0=0; }
|
|
| 237 |
//printf("\tlinkage = %d\n", sc.linkage);
|
|
| 238 |
|
|
| 239 | 1 |
if (funcdecl.ident == Id.assign && !funcdecl.inuse) |
| 240 |
{
|
|
| 241 | 1 |
if (funcdecl.storage_class & STC.inference) |
| 242 |
{
|
|
| 243 |
/* https://issues.dlang.org/show_bug.cgi?id=15044
|
|
| 244 |
* For generated opAssign function, any errors
|
|
| 245 |
* from its body need to be gagged.
|
|
| 246 |
*/
|
|
| 247 | 1 |
uint oldErrors = global.startGagging(); |
| 248 | 1 |
++funcdecl.inuse; |
| 249 | 1 |
funcdecl.semantic3(sc); |
| 250 | 1 |
--funcdecl.inuse; |
| 251 | 1 |
if (global.endGagging(oldErrors)) // if errors happened |
| 252 |
{
|
|
| 253 |
// Disable generated opAssign, because some members forbid identity assignment.
|
|
| 254 | 1 |
funcdecl.storage_class |= STC.disable; |
| 255 | 1 |
funcdecl.fbody = null; // remove fbody which contains the error |
| 256 | 1 |
funcdecl.semantic3Errors = false; |
| 257 |
}
|
|
| 258 | 1 |
return; |
| 259 |
}
|
|
| 260 |
}
|
|
| 261 |
|
|
| 262 |
//printf(" sc.incontract = %d\n", (sc.flags & SCOPE.contract));
|
|
| 263 | 1 |
if (funcdecl.semanticRun >= PASS.semantic3) |
| 264 | 1 |
return; |
| 265 | 1 |
funcdecl.semanticRun = PASS.semantic3; |
| 266 | 1 |
funcdecl.semantic3Errors = false; |
| 267 |
|
|
| 268 | 1 |
if (!funcdecl.type || funcdecl.type.ty != Tfunction) |
| 269 | 1 |
return; |
| 270 | 1 |
TypeFunction f = cast(TypeFunction)funcdecl.type; |
| 271 | 1 |
if (!funcdecl.inferRetType && f.next.ty == Terror) |
| 272 |
return; |
|
| 273 |
|
|
| 274 | 1 |
if (!funcdecl.fbody && funcdecl.inferRetType && !f.next) |
| 275 |
{
|
|
| 276 | 1 |
funcdecl.error("has no function body with return type inference"); |
| 277 | 1 |
return; |
| 278 |
}
|
|
| 279 |
|
|
| 280 | 1 |
uint oldErrors = global.errors; |
| 281 | 1 |
auto fds = FuncDeclSem3(funcdecl,sc); |
| 282 |
|
|
| 283 | 1 |
fds.checkInContractOverrides(); |
| 284 |
|
|
| 285 |
// Remember whether we need to generate an 'out' contract.
|
|
| 286 | 1 |
immutable bool needEnsure = FuncDeclaration.needsFensure(funcdecl); |
| 287 |
|
|
| 288 | 1 |
if (funcdecl.fbody || funcdecl.frequires || needEnsure) |
| 289 |
{
|
|
| 290 |
/* Symbol table into which we place parameters and nested functions,
|
|
| 291 |
* solely to diagnose name collisions.
|
|
| 292 |
*/
|
|
| 293 | 1 |
funcdecl.localsymtab = new DsymbolTable(); |
| 294 |
|
|
| 295 |
// Establish function scope
|
|
| 296 | 1 |
auto ss = new ScopeDsymbol(funcdecl.loc, null); |
| 297 |
// find enclosing scope symbol, might skip symbol-less CTFE and/or FuncExp scopes
|
|
| 298 | 1 |
for (auto scx = sc; ; scx = scx.enclosing) |
| 299 |
{
|
|
| 300 | 1 |
if (scx.scopesym) |
| 301 |
{
|
|
| 302 | 1 |
ss.parent = scx.scopesym; |
| 303 | 1 |
break; |
| 304 |
}
|
|
| 305 |
}
|
|
| 306 | 1 |
ss.endlinnum = funcdecl.endloc.linnum; |
| 307 | 1 |
Scope* sc2 = sc.push(ss); |
| 308 | 1 |
sc2.func = funcdecl; |
| 309 | 1 |
sc2.parent = funcdecl; |
| 310 | 1 |
sc2.ctorflow.callSuper = CSX.none; |
| 311 | 1 |
sc2.sbreak = null; |
| 312 | 1 |
sc2.scontinue = null; |
| 313 | 1 |
sc2.sw = null; |
| 314 | 1 |
sc2.fes = funcdecl.fes; |
| 315 | 1 |
sc2.linkage = LINK.d; |
| 316 | 1 |
sc2.stc &= STCFlowThruFunction; |
| 317 | 1 |
sc2.protection = Prot(Prot.Kind.public_); |
| 318 | 1 |
sc2.explicitProtection = 0; |
| 319 | 1 |
sc2.aligndecl = null; |
| 320 | 1 |
if (funcdecl.ident != Id.require && funcdecl.ident != Id.ensure) |
| 321 | 1 |
sc2.flags = sc.flags & ~SCOPE.contract; |
| 322 | 1 |
sc2.flags &= ~SCOPE.compile; |
| 323 | 1 |
sc2.tf = null; |
| 324 | 1 |
sc2.os = null; |
| 325 | 1 |
sc2.inLoop = false; |
| 326 | 1 |
sc2.userAttribDecl = null; |
| 327 | 1 |
if (sc2.intypeof == 1) |
| 328 | 1 |
sc2.intypeof = 2; |
| 329 | 1 |
sc2.ctorflow.fieldinit = null; |
| 330 |
|
|
| 331 |
/* Note: When a lambda is defined immediately under aggregate member
|
|
| 332 |
* scope, it should be contextless due to prevent interior pointers.
|
|
| 333 |
* e.g.
|
|
| 334 |
* // dg points 'this' - it's interior pointer
|
|
| 335 |
* class C { int x; void delegate() dg = (){ this.x = 1; }; }
|
|
| 336 |
*
|
|
| 337 |
* However, lambdas could be used inside typeof, in order to check
|
|
| 338 |
* some expressions validity at compile time. For such case the lambda
|
|
| 339 |
* body can access aggregate instance members.
|
|
| 340 |
* e.g.
|
|
| 341 |
* class C { int x; static assert(is(typeof({ this.x = 1; }))); }
|
|
| 342 |
*
|
|
| 343 |
* To properly accept it, mark these lambdas as member functions.
|
|
| 344 |
*/
|
|
| 345 | 1 |
if (auto fld = funcdecl.isFuncLiteralDeclaration()) |
| 346 |
{
|
|
| 347 | 1 |
if (auto ad = funcdecl.isMember2()) |
| 348 |
{
|
|
| 349 | 1 |
if (!sc.intypeof) |
| 350 |
{
|
|
| 351 | 1 |
if (fld.tok == TOK.delegate_) |
| 352 | 1 |
funcdecl.error("cannot be %s members", ad.kind()); |
| 353 |
else
|
|
| 354 | 1 |
fld.tok = TOK.function_; |
| 355 |
}
|
|
| 356 |
else
|
|
| 357 |
{
|
|
| 358 | 1 |
if (fld.tok != TOK.function_) |
| 359 | 1 |
fld.tok = TOK.delegate_; |
| 360 |
}
|
|
| 361 |
}
|
|
| 362 |
}
|
|
| 363 |
|
|
| 364 | 1 |
funcdecl.declareThis(sc2); |
| 365 |
|
|
| 366 |
//printf("[%s] ad = %p vthis = %p\n", loc.toChars(), ad, vthis);
|
|
| 367 |
//if (vthis) printf("\tvthis.type = %s\n", vthis.type.toChars());
|
|
| 368 |
|
|
| 369 |
// Declare hidden variable _arguments[] and _argptr
|
|
| 370 | 1 |
if (f.parameterList.varargs == VarArg.variadic) |
| 371 |
{
|
|
| 372 | 1 |
if (f.linkage == LINK.d) |
| 373 |
{
|
|
| 374 |
// Variadic arguments depend on Typeinfo being defined.
|
|
| 375 | 1 |
if (!global.params.useTypeInfo || !Type.dtypeinfo || !Type.typeinfotypelist) |
| 376 |
{
|
|
| 377 | 1 |
if (!global.params.useTypeInfo) |
| 378 | 1 |
funcdecl.error("D-style variadic functions cannot be used with -betterC"); |
| 379 | 1 |
else if (!Type.typeinfotypelist) |
| 380 | 1 |
funcdecl.error("`object.TypeInfo_Tuple` could not be found, but is implicitly used in D-style variadic functions"); |
| 381 |
else
|
|
| 382 | 1 |
funcdecl.error("`object.TypeInfo` could not be found, but is implicitly used in D-style variadic functions"); |
| 383 | 1 |
fatal(); |
| 384 |
}
|
|
| 385 |
|
|
| 386 |
// Declare _arguments[]
|
|
| 387 | 1 |
funcdecl.v_arguments = new VarDeclaration(funcdecl.loc, Type.typeinfotypelist.type, Id._arguments_typeinfo, null); |
| 388 | 1 |
funcdecl.v_arguments.storage_class |= STC.temp | STC.parameter; |
| 389 | 1 |
funcdecl.v_arguments.dsymbolSemantic(sc2); |
| 390 | 1 |
sc2.insert(funcdecl.v_arguments); |
| 391 | 1 |
funcdecl.v_arguments.parent = funcdecl; |
| 392 |
|
|
| 393 |
//Type t = Type.dtypeinfo.type.constOf().arrayOf();
|
|
| 394 | 1 |
Type t = Type.dtypeinfo.type.arrayOf(); |
| 395 | 1 |
_arguments = new VarDeclaration(funcdecl.loc, t, Id._arguments, null); |
| 396 | 1 |
_arguments.storage_class |= STC.temp; |
| 397 | 1 |
_arguments.dsymbolSemantic(sc2); |
| 398 | 1 |
sc2.insert(_arguments); |
| 399 | 1 |
_arguments.parent = funcdecl; |
| 400 |
}
|
|
| 401 | 1 |
if (f.linkage == LINK.d || f.parameterList.length) |
| 402 |
{
|
|
| 403 |
// Declare _argptr
|
|
| 404 | 1 |
Type t = target.va_listType(funcdecl.loc, sc); |
| 405 |
// Init is handled in FuncDeclaration_toObjFile
|
|
| 406 | 1 |
funcdecl.v_argptr = new VarDeclaration(funcdecl.loc, t, Id._argptr, new VoidInitializer(funcdecl.loc)); |
| 407 | 1 |
funcdecl.v_argptr.storage_class |= STC.temp; |
| 408 | 1 |
funcdecl.v_argptr.dsymbolSemantic(sc2); |
| 409 | 1 |
sc2.insert(funcdecl.v_argptr); |
| 410 | 1 |
funcdecl.v_argptr.parent = funcdecl; |
| 411 |
}
|
|
| 412 |
}
|
|
| 413 |
|
|
| 414 |
/* Declare all the function parameters as variables
|
|
| 415 |
* and install them in parameters[]
|
|
| 416 |
*/
|
|
| 417 | 1 |
if (const nparams = f.parameterList.length) |
| 418 |
{
|
|
| 419 |
/* parameters[] has all the tuples removed, as the back end
|
|
| 420 |
* doesn't know about tuples
|
|
| 421 |
*/
|
|
| 422 | 1 |
funcdecl.parameters = new VarDeclarations(); |
| 423 | 1 |
funcdecl.parameters.reserve(nparams); |
| 424 | 1 |
foreach (i, fparam; f.parameterList) |
| 425 |
{
|
|
| 426 | 1 |
Identifier id = fparam.ident; |
| 427 | 1 |
StorageClass stc = 0; |
| 428 | 1 |
if (!id) |
| 429 |
{
|
|
| 430 |
/* Generate identifier for un-named parameter,
|
|
| 431 |
* because we need it later on.
|
|
| 432 |
*/
|
|
| 433 | 1 |
fparam.ident = id = Identifier.generateId("_param_", i); |
| 434 | 1 |
stc |= STC.temp; |
| 435 |
}
|
|
| 436 | 1 |
Type vtype = fparam.type; |
| 437 | 1 |
auto v = new VarDeclaration(funcdecl.loc, vtype, id, null); |
| 438 |
//printf("declaring parameter %s of type %s\n", v.toChars(), v.type.toChars());
|
|
| 439 | 1 |
stc |= STC.parameter; |
| 440 | 1 |
if (f.parameterList.varargs == VarArg.typesafe && i + 1 == nparams) |
| 441 |
{
|
|
| 442 | 1 |
stc |= STC.variadic; |
| 443 | 1 |
auto vtypeb = vtype.toBasetype(); |
| 444 | 1 |
if (vtypeb.ty == Tarray) |
| 445 |
{
|
|
| 446 |
/* Since it'll be pointing into the stack for the array
|
|
| 447 |
* contents, it needs to be `scope`
|
|
| 448 |
*/
|
|
| 449 | 1 |
stc |= STC.scope_; |
| 450 |
}
|
|
| 451 |
}
|
|
| 452 |
|
|
| 453 | 1 |
if ((funcdecl.flags & FUNCFLAG.inferScope) && !(fparam.storageClass & STC.scope_)) |
| 454 | 1 |
stc |= STC.maybescope; |
| 455 |
|
|
| 456 | 1 |
stc |= fparam.storageClass & (STC.IOR | STC.return_ | STC.scope_ | STC.lazy_ | STC.final_ | STC.TYPECTOR | STC.nodtor); |
| 457 | 1 |
v.storage_class = stc; |
| 458 | 1 |
v.dsymbolSemantic(sc2); |
| 459 | 1 |
if (!sc2.insert(v)) |
| 460 |
{
|
|
| 461 | 1 |
funcdecl.error("parameter `%s.%s` is already defined", funcdecl.toChars(), v.toChars()); |
| 462 | 1 |
funcdecl.errors = true; |
| 463 |
}
|
|
| 464 |
else
|
|
| 465 | 1 |
funcdecl.parameters.push(v); |
| 466 | 1 |
funcdecl.localsymtab.insert(v); |
| 467 | 1 |
v.parent = funcdecl; |
| 468 | 1 |
if (fparam.userAttribDecl) |
| 469 | 1 |
v.userAttribDecl = fparam.userAttribDecl; |
| 470 |
}
|
|
| 471 |
}
|
|
| 472 |
|
|
| 473 |
// Declare the tuple symbols and put them in the symbol table,
|
|
| 474 |
// but not in parameters[].
|
|
| 475 | 1 |
if (f.parameterList.parameters) |
| 476 | 1 |
foreach (fparam; *f.parameterList.parameters) |
| 477 |
{
|
|
| 478 | 1 |
if (!fparam.ident) |
| 479 | 1 |
continue; // never used, so ignore |
| 480 |
// expand any tuples
|
|
| 481 | 1 |
if (fparam.type.ty != Ttuple) |
| 482 | 1 |
continue; |
| 483 |
|
|
| 484 | 1 |
TypeTuple t = cast(TypeTuple)fparam.type; |
| 485 | 1 |
size_t dim = Parameter.dim(t.arguments); |
| 486 | 1 |
auto exps = new Objects(dim); |
| 487 | 1 |
foreach (j; 0 .. dim) |
| 488 |
{
|
|
| 489 | 1 |
Parameter narg = Parameter.getNth(t.arguments, j); |
| 490 | 1 |
assert(narg.ident); |
| 491 | 1 |
VarDeclaration v = sc2.search(Loc.initial, narg.ident, null).isVarDeclaration(); |
| 492 | 1 |
assert(v); |
| 493 | 1 |
(*exps)[j] = new VarExp(v.loc, v); |
| 494 |
}
|
|
| 495 | 1 |
assert(fparam.ident); |
| 496 | 1 |
auto v = new TupleDeclaration(funcdecl.loc, fparam.ident, exps); |
| 497 |
//printf("declaring tuple %s\n", v.toChars());
|
|
| 498 | 1 |
v.isexp = true; |
| 499 | 1 |
if (!sc2.insert(v)) |
| 500 |
funcdecl.error("parameter `%s.%s` is already defined", funcdecl.toChars(), v.toChars()); |
|
| 501 | 1 |
funcdecl.localsymtab.insert(v); |
| 502 | 1 |
v.parent = funcdecl; |
| 503 |
}
|
|
| 504 |
|
|
| 505 |
// Precondition invariant
|
|
| 506 | 1 |
Statement fpreinv = null; |
| 507 | 1 |
if (funcdecl.addPreInvariant()) |
| 508 |
{
|
|
| 509 | 1 |
Expression e = addInvariant(funcdecl.isThis(), funcdecl.vthis); |
| 510 | 1 |
if (e) |
| 511 | 1 |
fpreinv = new ExpStatement(Loc.initial, e); |
| 512 |
}
|
|
| 513 |
|
|
| 514 |
// Postcondition invariant
|
|
| 515 | 1 |
Statement fpostinv = null; |
| 516 | 1 |
if (funcdecl.addPostInvariant()) |
| 517 |
{
|
|
| 518 | 1 |
Expression e = addInvariant(funcdecl.isThis(), funcdecl.vthis); |
| 519 | 1 |
if (e) |
| 520 | 1 |
fpostinv = new ExpStatement(Loc.initial, e); |
| 521 |
}
|
|
| 522 |
|
|
| 523 |
// Pre/Postcondition contract
|
|
| 524 | 1 |
if (!funcdecl.fbody) |
| 525 | 1 |
funcdecl.buildEnsureRequire(); |
| 526 |
|
|
| 527 | 1 |
Scope* scout = null; |
| 528 | 1 |
if (needEnsure || funcdecl.addPostInvariant()) |
| 529 |
{
|
|
| 530 |
/* https://issues.dlang.org/show_bug.cgi?id=3657
|
|
| 531 |
* Set the correct end line number for fensure scope.
|
|
| 532 |
*/
|
|
| 533 | 1 |
uint fensure_endlin = funcdecl.endloc.linnum; |
| 534 | 1 |
if (funcdecl.fensure) |
| 535 | 1 |
if (auto s = funcdecl.fensure.isScopeStatement()) |
| 536 |
fensure_endlin = s.endloc.linnum; |
|
| 537 |
|
|
| 538 | 1 |
if ((needEnsure && global.params.useOut == CHECKENABLE.on) || fpostinv) |
| 539 |
{
|
|
| 540 | 1 |
funcdecl.returnLabel = funcdecl.searchLabel(Id.returnLabel); |
| 541 |
}
|
|
| 542 |
|
|
| 543 |
// scope of out contract (need for vresult.semantic)
|
|
| 544 | 1 |
auto sym = new ScopeDsymbol(funcdecl.loc, null); |
| 545 | 1 |
sym.parent = sc2.scopesym; |
| 546 | 1 |
sym.endlinnum = fensure_endlin; |
| 547 | 1 |
scout = sc2.push(sym); |
| 548 |
}
|
|
| 549 |
|
|
| 550 | 1 |
if (funcdecl.fbody) |
| 551 |
{
|
|
| 552 | 1 |
auto sym = new ScopeDsymbol(funcdecl.loc, null); |
| 553 | 1 |
sym.parent = sc2.scopesym; |
| 554 | 1 |
sym.endlinnum = funcdecl.endloc.linnum; |
| 555 | 1 |
sc2 = sc2.push(sym); |
| 556 |
|
|
| 557 | 1 |
auto ad2 = funcdecl.isMemberLocal(); |
| 558 |
|
|
| 559 |
/* If this is a class constructor
|
|
| 560 |
*/
|
|
| 561 | 1 |
if (ad2 && funcdecl.isCtorDeclaration()) |
| 562 |
{
|
|
| 563 | 1 |
sc2.ctorflow.allocFieldinit(ad2.fields.dim); |
| 564 | 1 |
foreach (v; ad2.fields) |
| 565 |
{
|
|
| 566 | 1 |
v.ctorinit = 0; |
| 567 |
}
|
|
| 568 |
}
|
|
| 569 |
|
|
| 570 | 1 |
if (!funcdecl.inferRetType && !target.isReturnOnStack(f, funcdecl.needThis())) |
| 571 | 1 |
funcdecl.nrvo_can = 0; |
| 572 |
|
|
| 573 | 1 |
bool inferRef = (f.isref && (funcdecl.storage_class & STC.auto_)); |
| 574 |
|
|
| 575 | 1 |
funcdecl.fbody = funcdecl.fbody.statementSemantic(sc2); |
| 576 | 1 |
if (!funcdecl.fbody) |
| 577 | 1 |
funcdecl.fbody = new CompoundStatement(Loc.initial, new Statements()); |
| 578 |
|
|
| 579 | 1 |
if (funcdecl.naked) |
| 580 |
{
|
|
| 581 | 1 |
fpreinv = null; // can't accommodate with no stack frame |
| 582 | 1 |
fpostinv = null; |
| 583 |
}
|
|
| 584 |
|
|
| 585 | 1 |
assert(funcdecl.type == f || (funcdecl.type.ty == Tfunction && f.purity == PURE.impure && (cast(TypeFunction)funcdecl.type).purity >= PURE.fwdref)); |
| 586 | 1 |
f = cast(TypeFunction)funcdecl.type; |
| 587 |
|
|
| 588 | 1 |
if (funcdecl.inferRetType) |
| 589 |
{
|
|
| 590 |
// If no return type inferred yet, then infer a void
|
|
| 591 | 1 |
if (!f.next) |
| 592 | 1 |
f.next = Type.tvoid; |
| 593 | 1 |
if (f.checkRetType(funcdecl.loc)) |
| 594 | 1 |
funcdecl.fbody = new ErrorStatement(); |
| 595 |
}
|
|
| 596 | 1 |
if (global.params.vcomplex && f.next !is null) |
| 597 | 1 |
f.next.checkComplexTransition(funcdecl.loc, sc); |
| 598 |
|
|
| 599 | 1 |
if (funcdecl.returns && !funcdecl.fbody.isErrorStatement()) |
| 600 |
{
|
|
| 601 | 1 |
for (size_t i = 0; i < funcdecl.returns.dim;) |
| 602 |
{
|
|
| 603 | 1 |
Expression exp = (*funcdecl.returns)[i].exp; |
| 604 | 1 |
if (exp.op == TOK.variable && (cast(VarExp)exp).var == funcdecl.vresult) |
| 605 |
{
|
|
| 606 | 1 |
if (addReturn0()) |
| 607 | 1 |
exp.type = Type.tint32; |
| 608 |
else
|
|
| 609 | 1 |
exp.type = f.next; |
| 610 |
// Remove `return vresult;` from returns
|
|
| 611 | 1 |
funcdecl.returns.remove(i); |
| 612 | 1 |
continue; |
| 613 |
}
|
|
| 614 | 1 |
if (inferRef && f.isref && !exp.type.constConv(f.next)) // https://issues.dlang.org/show_bug.cgi?id=13336 |
| 615 | 1 |
f.isref = false; |
| 616 | 1 |
i++; |
| 617 |
}
|
|
| 618 |
}
|
|
| 619 | 1 |
if (f.isref) // Function returns a reference |
| 620 |
{
|
|
| 621 | 1 |
if (funcdecl.storage_class & STC.auto_) |
| 622 | 1 |
funcdecl.storage_class &= ~STC.auto_; |
| 623 |
}
|
|
| 624 |
|
|
| 625 |
// handle NRVO
|
|
| 626 | 1 |
if (!target.isReturnOnStack(f, funcdecl.needThis()) || funcdecl.checkNrvo()) |
| 627 | 1 |
funcdecl.nrvo_can = 0; |
| 628 |
|
|
| 629 | 1 |
if (funcdecl.fbody.isErrorStatement()) |
| 630 |
{
|
|
| 631 |
}
|
|
| 632 | 1 |
else if (funcdecl.isStaticCtorDeclaration()) |
| 633 |
{
|
|
| 634 |
/* It's a static constructor. Ensure that all
|
|
| 635 |
* ctor consts were initialized.
|
|
| 636 |
*/
|
|
| 637 | 1 |
ScopeDsymbol pd = funcdecl.toParent().isScopeDsymbol(); |
| 638 | 1 |
for (size_t i = 0; i < pd.members.dim; i++) |
| 639 |
{
|
|
| 640 | 1 |
Dsymbol s = (*pd.members)[i]; |
| 641 | 1 |
s.checkCtorConstInit(); |
| 642 |
}
|
|
| 643 |
}
|
|
| 644 | 1 |
else if (ad2 && funcdecl.isCtorDeclaration()) |
| 645 |
{
|
|
| 646 | 1 |
ClassDeclaration cd = ad2.isClassDeclaration(); |
| 647 |
|
|
| 648 |
// Verify that all the ctorinit fields got initialized
|
|
| 649 | 1 |
if (!(sc2.ctorflow.callSuper & CSX.this_ctor)) |
| 650 |
{
|
|
| 651 | 1 |
foreach (i, v; ad2.fields) |
| 652 |
{
|
|
| 653 | 1 |
if (v.isThisDeclaration()) |
| 654 | 1 |
continue; |
| 655 | 1 |
if (v.ctorinit == 0) |
| 656 |
{
|
|
| 657 |
/* Current bugs in the flow analysis:
|
|
| 658 |
* 1. union members should not produce error messages even if
|
|
| 659 |
* not assigned to
|
|
| 660 |
* 2. structs should recognize delegating opAssign calls as well
|
|
| 661 |
* as delegating calls to other constructors
|
|
| 662 |
*/
|
|
| 663 | 1 |
if (v.isCtorinit() && !v.type.isMutable() && cd) |
| 664 | 1 |
funcdecl.error("missing initializer for %s field `%s`", MODtoChars(v.type.mod), v.toChars()); |
| 665 | 1 |
else if (v.storage_class & STC.nodefaultctor) |
| 666 | 1 |
error(funcdecl.loc, "field `%s` must be initialized in constructor", v.toChars()); |
| 667 | 1 |
else if (v.type.needsNested()) |
| 668 | 1 |
error(funcdecl.loc, "field `%s` must be initialized in constructor, because it is nested struct", v.toChars()); |
| 669 |
}
|
|
| 670 |
else
|
|
| 671 |
{
|
|
| 672 | 1 |
bool mustInit = (v.storage_class & STC.nodefaultctor || v.type.needsNested()); |
| 673 | 1 |
if (mustInit && !(sc2.ctorflow.fieldinit[i].csx & CSX.this_ctor)) |
| 674 |
{
|
|
| 675 |
funcdecl.error("field `%s` must be initialized but skipped", v.toChars()); |
|
| 676 |
}
|
|
| 677 |
}
|
|
| 678 |
}
|
|
| 679 |
}
|
|
| 680 | 1 |
sc2.ctorflow.freeFieldinit(); |
| 681 |
|
|
| 682 | 1 |
if (cd && !(sc2.ctorflow.callSuper & CSX.any_ctor) && cd.baseClass && cd.baseClass.ctor) |
| 683 |
{
|
|
| 684 | 1 |
sc2.ctorflow.callSuper = CSX.none; |
| 685 |
|
|
| 686 |
// Insert implicit super() at start of fbody
|
|
| 687 | 1 |
Type tthis = ad2.type.addMod(funcdecl.vthis.type.mod); |
| 688 | 1 |
FuncDeclaration fd = resolveFuncCall(Loc.initial, sc2, cd.baseClass.ctor, null, tthis, null, FuncResolveFlag.quiet); |
| 689 | 1 |
if (!fd) |
| 690 |
{
|
|
| 691 | 1 |
funcdecl.error("no match for implicit `super()` call in constructor"); |
| 692 |
}
|
|
| 693 | 1 |
else if (fd.storage_class & STC.disable) |
| 694 |
{
|
|
| 695 | 1 |
funcdecl.error("cannot call `super()` implicitly because it is annotated with `@disable`"); |
| 696 |
}
|
|
| 697 |
else
|
|
| 698 |
{
|
|
| 699 | 1 |
Expression e1 = new SuperExp(Loc.initial); |
| 700 | 1 |
Expression e = new CallExp(Loc.initial, e1); |
| 701 | 1 |
e = e.expressionSemantic(sc2); |
| 702 | 1 |
Statement s = new ExpStatement(Loc.initial, e); |
| 703 | 1 |
funcdecl.fbody = new CompoundStatement(Loc.initial, s, funcdecl.fbody); |
| 704 |
}
|
|
| 705 |
}
|
|
| 706 |
//printf("ctorflow.callSuper = x%x\n", sc2.ctorflow.callSuper);
|
|
| 707 |
}
|
|
| 708 |
|
|
| 709 |
/* https://issues.dlang.org/show_bug.cgi?id=17502
|
|
| 710 |
* Wait until after the return type has been inferred before
|
|
| 711 |
* generating the contracts for this function, and merging contracts
|
|
| 712 |
* from overrides.
|
|
| 713 |
*
|
|
| 714 |
* https://issues.dlang.org/show_bug.cgi?id=17893
|
|
| 715 |
* However should take care to generate this before inferered
|
|
| 716 |
* function attributes are applied, such as 'nothrow'.
|
|
| 717 |
*
|
|
| 718 |
* This was originally at the end of the first semantic pass, but
|
|
| 719 |
* required a fix-up to be done here for the '__result' variable
|
|
| 720 |
* type of __ensure() inside auto functions, but this didn't work
|
|
| 721 |
* if the out parameter was implicit.
|
|
| 722 |
*/
|
|
| 723 | 1 |
funcdecl.buildEnsureRequire(); |
| 724 |
|
|
| 725 |
// Check for errors related to 'nothrow'.
|
|
| 726 | 1 |
const blockexit = funcdecl.fbody.blockExit(funcdecl, f.isnothrow); |
| 727 | 1 |
if (f.isnothrow && blockexit & BE.throw_) |
| 728 | 1 |
error(funcdecl.loc, "`nothrow` %s `%s` may throw", funcdecl.kind(), funcdecl.toPrettyChars()); |
| 729 |
|
|
| 730 | 1 |
if (!(blockexit & (BE.throw_ | BE.halt) || funcdecl.flags & FUNCFLAG.hasCatches)) |
| 731 |
{
|
|
| 732 |
/* Disable optimization on Win32 due to
|
|
| 733 |
* https://issues.dlang.org/show_bug.cgi?id=17997
|
|
| 734 |
*/
|
|
| 735 |
// if (!global.params.isWindows || global.params.is64bit)
|
|
| 736 | 1 |
funcdecl.eh_none = true; // don't generate unwind tables for this function |
| 737 |
}
|
|
| 738 |
|
|
| 739 | 1 |
if (funcdecl.flags & FUNCFLAG.nothrowInprocess) |
| 740 |
{
|
|
| 741 | 1 |
if (funcdecl.type == f) |
| 742 | 1 |
f = cast(TypeFunction)f.copy(); |
| 743 | 1 |
f.isnothrow = !(blockexit & BE.throw_); |
| 744 |
}
|
|
| 745 |
|
|
| 746 | 1 |
if (funcdecl.fbody.isErrorStatement()) |
| 747 |
{
|
|
| 748 |
}
|
|
| 749 | 1 |
else if (ad2 && funcdecl.isCtorDeclaration()) |
| 750 |
{
|
|
| 751 |
/* Append:
|
|
| 752 |
* return this;
|
|
| 753 |
* to function body
|
|
| 754 |
*/
|
|
| 755 | 1 |
if (blockexit & BE.fallthru) |
| 756 |
{
|
|
| 757 | 1 |
Statement s = new ReturnStatement(funcdecl.loc, null); |
| 758 | 1 |
s = s.statementSemantic(sc2); |
| 759 | 1 |
funcdecl.fbody = new CompoundStatement(funcdecl.loc, funcdecl.fbody, s); |
| 760 | 1 |
funcdecl.hasReturnExp |= (funcdecl.hasReturnExp & 1 ? 16 : 1); |
| 761 |
}
|
|
| 762 |
}
|
|
| 763 | 1 |
else if (funcdecl.fes) |
| 764 |
{
|
|
| 765 |
// For foreach(){} body, append a return 0;
|
|
| 766 | 1 |
if (blockexit & BE.fallthru) |
| 767 |
{
|
|
| 768 | 1 |
Expression e = IntegerExp.literal!0; |
| 769 | 1 |
Statement s = new ReturnStatement(Loc.initial, e); |
| 770 | 1 |
funcdecl.fbody = new CompoundStatement(Loc.initial, funcdecl.fbody, s); |
| 771 | 1 |
funcdecl.hasReturnExp |= (funcdecl.hasReturnExp & 1 ? 16 : 1); |
| 772 |
}
|
|
| 773 | 1 |
assert(!funcdecl.returnLabel); |
| 774 |
}
|
|
| 775 |
else
|
|
| 776 |
{
|
|
| 777 | 1 |
const(bool) inlineAsm = (funcdecl.hasReturnExp & 8) != 0; |
| 778 | 1 |
if ((blockexit & BE.fallthru) && f.next.ty != Tvoid && !inlineAsm) |
| 779 |
{
|
|
| 780 | 1 |
Expression e; |
| 781 | 1 |
if (!funcdecl.hasReturnExp) |
| 782 | 1 |
funcdecl.error("has no `return` statement, but is expected to return a value of type `%s`", f.next.toChars()); |
| 783 |
else
|
|
| 784 | 1 |
funcdecl.error("no `return exp;` or `assert(0);` at end of function"); |
| 785 | 1 |
if (global.params.useAssert == CHECKENABLE.on && !global.params.useInline) |
| 786 |
{
|
|
| 787 |
/* Add an assert(0, msg); where the missing return
|
|
| 788 |
* should be.
|
|
| 789 |
*/
|
|
| 790 | 1 |
e = new AssertExp(funcdecl.endloc, IntegerExp.literal!0, new StringExp(funcdecl.loc, "missing return expression")); |
| 791 |
}
|
|
| 792 |
else
|
|
| 793 |
e = new HaltExp(funcdecl.endloc); |
|
| 794 | 1 |
e = new CommaExp(Loc.initial, e, f.next.defaultInit(Loc.initial)); |
| 795 | 1 |
e = e.expressionSemantic(sc2); |
| 796 | 1 |
Statement s = new ExpStatement(Loc.initial, e); |
| 797 | 1 |
funcdecl.fbody = new CompoundStatement(Loc.initial, funcdecl.fbody, s); |
| 798 |
}
|
|
| 799 |
}
|
|
| 800 |
|
|
| 801 | 1 |
if (funcdecl.returns) |
| 802 |
{
|
|
| 803 | 1 |
bool implicit0 = addReturn0(); |
| 804 | 1 |
Type tret = implicit0 ? Type.tint32 : f.next; |
| 805 | 1 |
assert(tret.ty != Tvoid); |
| 806 | 1 |
if (funcdecl.vresult || funcdecl.returnLabel) |
| 807 | 1 |
funcdecl.buildResultVar(scout ? scout : sc2, tret); |
| 808 |
|
|
| 809 |
/* Cannot move this loop into NrvoWalker, because
|
|
| 810 |
* returns[i] may be in the nested delegate for foreach-body.
|
|
| 811 |
*/
|
|
| 812 | 1 |
for (size_t i = 0; i < funcdecl.returns.dim; i++) |
| 813 |
{
|
|
| 814 | 1 |
ReturnStatement rs = (*funcdecl.returns)[i]; |
| 815 | 1 |
Expression exp = rs.exp; |
| 816 | 1 |
if (exp.op == TOK.error) |
| 817 | 1 |
continue; |
| 818 | 1 |
if (tret.ty == Terror) |
| 819 |
{
|
|
| 820 |
// https://issues.dlang.org/show_bug.cgi?id=13702
|
|
| 821 | 1 |
exp = checkGC(sc2, exp); |
| 822 | 1 |
continue; |
| 823 |
}
|
|
| 824 |
|
|
| 825 |
/* If the expression in the return statement (exp) cannot be implicitly
|
|
| 826 |
* converted to the return type (tret) of the function and if the
|
|
| 827 |
* type of the expression is type isolated, then it may be possible
|
|
| 828 |
* that a promotion to `immutable` or `inout` (through a cast) will
|
|
| 829 |
* match the return type.
|
|
| 830 |
*/
|
|
| 831 | 1 |
if (!exp.implicitConvTo(tret) && funcdecl.isTypeIsolated(exp.type)) |
| 832 |
{
|
|
| 833 |
/* https://issues.dlang.org/show_bug.cgi?id=20073
|
|
| 834 |
*
|
|
| 835 |
* The problem is that if the type of the returned expression (exp.type)
|
|
| 836 |
* is an aggregated declaration with an alias this, the alias this may be
|
|
| 837 |
* used for the conversion testing without it being an isolated type.
|
|
| 838 |
*
|
|
| 839 |
* To make sure this does not happen, we can test here the implicit conversion
|
|
| 840 |
* only for the aggregated declaration type by using `implicitConvToWithoutAliasThis`.
|
|
| 841 |
* The implicit conversion with alias this is taken care of later.
|
|
| 842 |
*/
|
|
| 843 | 1 |
AggregateDeclaration aggDecl = isAggregate(exp.type); |
| 844 | 1 |
TypeStruct tstruct; |
| 845 | 1 |
TypeClass tclass; |
| 846 | 1 |
bool hasAliasThis; |
| 847 | 1 |
if (aggDecl && aggDecl.aliasthis) |
| 848 |
{
|
|
| 849 | 1 |
hasAliasThis = true; |
| 850 | 1 |
tclass = exp.type.isTypeClass(); |
| 851 | 1 |
if (!tclass) |
| 852 | 1 |
tstruct = exp.type.isTypeStruct(); |
| 853 | 1 |
assert(tclass || tstruct); |
| 854 |
}
|
|
| 855 | 1 |
if (hasAliasThis) |
| 856 |
{
|
|
| 857 | 1 |
if (tclass) |
| 858 |
{
|
|
| 859 |
if ((cast(TypeClass)(exp.type.immutableOf())).implicitConvToWithoutAliasThis(tret)) |
|
| 860 |
exp = exp.castTo(sc2, exp.type.immutableOf()); |
|
| 861 |
else if ((cast(TypeClass)(exp.type.wildOf())).implicitConvToWithoutAliasThis(tret)) |
|
| 862 |
exp = exp.castTo(sc2, exp.type.wildOf()); |
|
| 863 |
}
|
|
| 864 |
else
|
|
| 865 |
{
|
|
| 866 | 1 |
if ((cast(TypeStruct)exp.type.immutableOf()).implicitConvToWithoutAliasThis(tret)) |
| 867 |
exp = exp.castTo(sc2, exp.type.immutableOf()); |
|
| 868 | 1 |
else if ((cast(TypeStruct)exp.type.immutableOf()).implicitConvToWithoutAliasThis(tret)) |
| 869 |
exp = exp.castTo(sc2, exp.type.wildOf()); |
|
| 870 |
}
|
|
| 871 |
}
|
|
| 872 |
else
|
|
| 873 |
{
|
|
| 874 | 1 |
if (exp.type.immutableOf().implicitConvTo(tret)) |
| 875 | 1 |
exp = exp.castTo(sc2, exp.type.immutableOf()); |
| 876 | 1 |
else if (exp.type.wildOf().implicitConvTo(tret)) |
| 877 | 1 |
exp = exp.castTo(sc2, exp.type.wildOf()); |
| 878 |
}
|
|
| 879 |
}
|
|
| 880 |
|
|
| 881 | 1 |
const hasCopyCtor = exp.type.ty == Tstruct && (cast(TypeStruct)exp.type).sym.hasCopyCtor; |
| 882 |
// if a copy constructor is present, the return type conversion will be handled by it
|
|
| 883 | 1 |
if (!(hasCopyCtor && exp.isLvalue())) |
| 884 | 1 |
exp = exp.implicitCastTo(sc2, tret); |
| 885 |
|
|
| 886 | 1 |
if (f.isref) |
| 887 |
{
|
|
| 888 |
// Function returns a reference
|
|
| 889 | 1 |
exp = exp.toLvalue(sc2, exp); |
| 890 | 1 |
checkReturnEscapeRef(sc2, exp, false); |
| 891 |
}
|
|
| 892 |
else
|
|
| 893 |
{
|
|
| 894 | 1 |
exp = exp.optimize(WANTvalue); |
| 895 |
|
|
| 896 |
/* https://issues.dlang.org/show_bug.cgi?id=10789
|
|
| 897 |
* If NRVO is not possible, all returned lvalues should call their postblits.
|
|
| 898 |
*/
|
|
| 899 | 1 |
if (!funcdecl.nrvo_can) |
| 900 | 1 |
exp = doCopyOrMove(sc2, exp, f.next); |
| 901 |
|
|
| 902 | 1 |
if (tret.hasPointers()) |
| 903 | 1 |
checkReturnEscape(sc2, exp, false); |
| 904 |
}
|
|
| 905 |
|
|
| 906 | 1 |
exp = checkGC(sc2, exp); |
| 907 |
|
|
| 908 | 1 |
if (funcdecl.vresult) |
| 909 |
{
|
|
| 910 |
// Create: return vresult = exp;
|
|
| 911 | 1 |
exp = new BlitExp(rs.loc, funcdecl.vresult, exp); |
| 912 | 1 |
exp.type = funcdecl.vresult.type; |
| 913 |
|
|
| 914 | 1 |
if (rs.caseDim) |
| 915 | 1 |
exp = Expression.combine(exp, new IntegerExp(rs.caseDim)); |
| 916 |
}
|
|
| 917 | 1 |
else if (funcdecl.tintro && !tret.equals(funcdecl.tintro.nextOf())) |
| 918 |
{
|
|
| 919 | 1 |
exp = exp.implicitCastTo(sc2, funcdecl.tintro.nextOf()); |
| 920 |
}
|
|
| 921 | 1 |
rs.exp = exp; |
| 922 |
}
|
|
| 923 |
}
|
|
| 924 | 1 |
if (funcdecl.nrvo_var || funcdecl.returnLabel) |
| 925 |
{
|
|
| 926 | 1 |
scope NrvoWalker nw = new NrvoWalker(); |
| 927 | 1 |
nw.fd = funcdecl; |
| 928 | 1 |
nw.sc = sc2; |
| 929 | 1 |
nw.visitStmt(funcdecl.fbody); |
| 930 |
}
|
|
| 931 |
|
|
| 932 | 1 |
sc2 = sc2.pop(); |
| 933 |
}
|
|
| 934 |
|
|
| 935 | 1 |
funcdecl.frequire = funcdecl.mergeFrequire(funcdecl.frequire, funcdecl.fdrequireParams); |
| 936 | 1 |
funcdecl.fensure = funcdecl.mergeFensure(funcdecl.fensure, Id.result, funcdecl.fdensureParams); |
| 937 |
|
|
| 938 | 1 |
Statement freq = funcdecl.frequire; |
| 939 | 1 |
Statement fens = funcdecl.fensure; |
| 940 |
|
|
| 941 |
/* Do the semantic analysis on the [in] preconditions and
|
|
| 942 |
* [out] postconditions.
|
|
| 943 |
*/
|
|
| 944 | 1 |
if (freq) |
| 945 |
{
|
|
| 946 |
/* frequire is composed of the [in] contracts
|
|
| 947 |
*/
|
|
| 948 | 1 |
auto sym = new ScopeDsymbol(funcdecl.loc, null); |
| 949 | 1 |
sym.parent = sc2.scopesym; |
| 950 | 1 |
sym.endlinnum = funcdecl.endloc.linnum; |
| 951 | 1 |
sc2 = sc2.push(sym); |
| 952 | 1 |
sc2.flags = (sc2.flags & ~SCOPE.contract) | SCOPE.require; |
| 953 |
|
|
| 954 |
// BUG: need to error if accessing out parameters
|
|
| 955 |
// BUG: need to disallow returns and throws
|
|
| 956 |
// BUG: verify that all in and ref parameters are read
|
|
| 957 | 1 |
freq = freq.statementSemantic(sc2); |
| 958 | 1 |
freq.blockExit(funcdecl, false); |
| 959 |
|
|
| 960 | 1 |
funcdecl.eh_none = false; |
| 961 |
|
|
| 962 | 1 |
sc2 = sc2.pop(); |
| 963 |
|
|
| 964 | 1 |
if (global.params.useIn == CHECKENABLE.off) |
| 965 | 1 |
freq = null; |
| 966 |
}
|
|
| 967 | 1 |
if (fens) |
| 968 |
{
|
|
| 969 |
/* fensure is composed of the [out] contracts
|
|
| 970 |
*/
|
|
| 971 | 1 |
if (f.next.ty == Tvoid && funcdecl.fensures) |
| 972 |
{
|
|
| 973 | 1 |
foreach (e; *funcdecl.fensures) |
| 974 |
{
|
|
| 975 | 1 |
if (e.id) |
| 976 |
{
|
|
| 977 | 1 |
funcdecl.error(e.ensure.loc, "`void` functions have no result"); |
| 978 |
//fens = null;
|
|
| 979 |
}
|
|
| 980 |
}
|
|
| 981 |
}
|
|
| 982 |
|
|
| 983 | 1 |
sc2 = scout; //push |
| 984 | 1 |
sc2.flags = (sc2.flags & ~SCOPE.contract) | SCOPE.ensure; |
| 985 |
|
|
| 986 |
// BUG: need to disallow returns and throws
|
|
| 987 |
|
|
| 988 | 1 |
if (funcdecl.fensure && f.next.ty != Tvoid) |
| 989 | 1 |
funcdecl.buildResultVar(scout, f.next); |
| 990 |
|
|
| 991 | 1 |
fens = fens.statementSemantic(sc2); |
| 992 | 1 |
fens.blockExit(funcdecl, false); |
| 993 |
|
|
| 994 | 1 |
funcdecl.eh_none = false; |
| 995 |
|
|
| 996 | 1 |
sc2 = sc2.pop(); |
| 997 |
|
|
| 998 | 1 |
if (global.params.useOut == CHECKENABLE.off) |
| 999 | 1 |
fens = null; |
| 1000 |
}
|
|
| 1001 | 1 |
if (funcdecl.fbody && funcdecl.fbody.isErrorStatement()) |
| 1002 |
{
|
|
| 1003 |
}
|
|
| 1004 |
else
|
|
| 1005 |
{
|
|
| 1006 | 1 |
auto a = new Statements(); |
| 1007 |
// Merge in initialization of 'out' parameters
|
|
| 1008 | 1 |
if (funcdecl.parameters) |
| 1009 |
{
|
|
| 1010 | 1 |
for (size_t i = 0; i < funcdecl.parameters.dim; i++) |
| 1011 |
{
|
|
| 1012 | 1 |
VarDeclaration v = (*funcdecl.parameters)[i]; |
| 1013 | 1 |
if (v.storage_class & STC.out_) |
| 1014 |
{
|
|
| 1015 | 1 |
if (!v._init) |
| 1016 |
{
|
|
| 1017 | 1 |
v.error("Zero-length `out` parameters are not allowed."); |
| 1018 | 1 |
return; |
| 1019 |
}
|
|
| 1020 | 1 |
ExpInitializer ie = v._init.isExpInitializer(); |
| 1021 | 1 |
assert(ie); |
| 1022 | 1 |
if (auto iec = ie.exp.isConstructExp()) |
| 1023 |
{
|
|
| 1024 |
// construction occurred in parameter processing
|
|
| 1025 |
auto ec = new AssignExp(iec.loc, iec.e1, iec.e2); |
|
| 1026 |
ec.type = iec.type; |
|
| 1027 |
ie.exp = ec; |
|
| 1028 |
}
|
|
| 1029 | 1 |
a.push(new ExpStatement(Loc.initial, ie.exp)); |
| 1030 |
}
|
|
| 1031 |
}
|
|
| 1032 |
}
|
|
| 1033 |
|
|
| 1034 | 1 |
if (_arguments) |
| 1035 |
{
|
|
| 1036 |
/* Advance to elements[] member of TypeInfo_Tuple with:
|
|
| 1037 |
* _arguments = v_arguments.elements;
|
|
| 1038 |
*/
|
|
| 1039 | 1 |
Expression e = new VarExp(Loc.initial, funcdecl.v_arguments); |
| 1040 | 1 |
e = new DotIdExp(Loc.initial, e, Id.elements); |
| 1041 | 1 |
e = new ConstructExp(Loc.initial, _arguments, e); |
| 1042 | 1 |
e = e.expressionSemantic(sc2); |
| 1043 |
|
|
| 1044 | 1 |
_arguments._init = new ExpInitializer(Loc.initial, e); |
| 1045 | 1 |
auto de = new DeclarationExp(Loc.initial, _arguments); |
| 1046 | 1 |
a.push(new ExpStatement(Loc.initial, de)); |
| 1047 |
}
|
|
| 1048 |
|
|
| 1049 |
// Merge contracts together with body into one compound statement
|
|
| 1050 |
|
|
| 1051 | 1 |
if (freq || fpreinv) |
| 1052 |
{
|
|
| 1053 | 1 |
if (!freq) |
| 1054 | 1 |
freq = fpreinv; |
| 1055 | 1 |
else if (fpreinv) |
| 1056 | 1 |
freq = new CompoundStatement(Loc.initial, freq, fpreinv); |
| 1057 |
|
|
| 1058 | 1 |
a.push(freq); |
| 1059 |
}
|
|
| 1060 |
|
|
| 1061 | 1 |
if (funcdecl.fbody) |
| 1062 | 1 |
a.push(funcdecl.fbody); |
| 1063 |
|
|
| 1064 | 1 |
if (fens || fpostinv) |
| 1065 |
{
|
|
| 1066 | 1 |
if (!fens) |
| 1067 | 1 |
fens = fpostinv; |
| 1068 | 1 |
else if (fpostinv) |
| 1069 | 1 |
fens = new CompoundStatement(Loc.initial, fpostinv, fens); |
| 1070 |
|
|
| 1071 | 1 |
auto ls = new LabelStatement(Loc.initial, Id.returnLabel, fens); |
| 1072 | 1 |
funcdecl.returnLabel.statement = ls; |
| 1073 | 1 |
a.push(funcdecl.returnLabel.statement); |
| 1074 |
|
|
| 1075 | 1 |
if (f.next.ty != Tvoid && funcdecl.vresult) |
| 1076 |
{
|
|
| 1077 |
// Create: return vresult;
|
|
| 1078 | 1 |
Expression e = new VarExp(Loc.initial, funcdecl.vresult); |
| 1079 | 1 |
if (funcdecl.tintro) |
| 1080 |
{
|
|
| 1081 | 1 |
e = e.implicitCastTo(sc, funcdecl.tintro.nextOf()); |
| 1082 | 1 |
e = e.expressionSemantic(sc); |
| 1083 |
}
|
|
| 1084 | 1 |
auto s = new ReturnStatement(Loc.initial, e); |
| 1085 | 1 |
a.push(s); |
| 1086 |
}
|
|
| 1087 |
}
|
|
| 1088 | 1 |
if (addReturn0()) |
| 1089 |
{
|
|
| 1090 |
// Add a return 0; statement
|
|
| 1091 | 1 |
Statement s = new ReturnStatement(Loc.initial, IntegerExp.literal!0); |
| 1092 | 1 |
a.push(s); |
| 1093 |
}
|
|
| 1094 |
|
|
| 1095 | 1 |
Statement sbody = new CompoundStatement(Loc.initial, a); |
| 1096 |
|
|
| 1097 |
/* Append destructor calls for parameters as finally blocks.
|
|
| 1098 |
*/
|
|
| 1099 | 1 |
if (funcdecl.parameters) |
| 1100 |
{
|
|
| 1101 | 1 |
foreach (v; *funcdecl.parameters) |
| 1102 |
{
|
|
| 1103 | 1 |
if (v.storage_class & (STC.ref_ | STC.out_ | STC.lazy_)) |
| 1104 | 1 |
continue; |
| 1105 | 1 |
if (v.needsScopeDtor()) |
| 1106 |
{
|
|
| 1107 |
// same with ExpStatement.scopeCode()
|
|
| 1108 | 1 |
Statement s = new DtorExpStatement(Loc.initial, v.edtor, v); |
| 1109 | 1 |
v.storage_class |= STC.nodtor; |
| 1110 |
|
|
| 1111 | 1 |
s = s.statementSemantic(sc2); |
| 1112 |
|
|
| 1113 | 1 |
bool isnothrow = f.isnothrow & !(funcdecl.flags & FUNCFLAG.nothrowInprocess); |
| 1114 | 1 |
const blockexit = s.blockExit(funcdecl, isnothrow); |
| 1115 | 1 |
if (blockexit & BE.throw_) |
| 1116 | 1 |
funcdecl.eh_none = false; |
| 1117 | 1 |
if (f.isnothrow && isnothrow && blockexit & BE.throw_) |
| 1118 | 1 |
error(funcdecl.loc, "`nothrow` %s `%s` may throw", funcdecl.kind(), funcdecl.toPrettyChars()); |
| 1119 | 1 |
if (funcdecl.flags & FUNCFLAG.nothrowInprocess && blockexit & BE.throw_) |
| 1120 | 1 |
f.isnothrow = false; |
| 1121 |
|
|
| 1122 | 1 |
if (sbody.blockExit(funcdecl, f.isnothrow) == BE.fallthru) |
| 1123 | 1 |
sbody = new CompoundStatement(Loc.initial, sbody, s); |
| 1124 |
else
|
|
| 1125 | 1 |
sbody = new TryFinallyStatement(Loc.initial, sbody, s); |
| 1126 |
}
|
|
| 1127 |
}
|
|
| 1128 |
}
|
|
| 1129 |
// from this point on all possible 'throwers' are checked
|
|
| 1130 | 1 |
funcdecl.flags &= ~FUNCFLAG.nothrowInprocess; |
| 1131 |
|
|
| 1132 | 1 |
if (funcdecl.isSynchronized()) |
| 1133 |
{
|
|
| 1134 |
/* Wrap the entire function body in a synchronized statement
|
|
| 1135 |
*/
|
|
| 1136 | 1 |
ClassDeclaration cd = funcdecl.toParentDecl().isClassDeclaration(); |
| 1137 | 1 |
if (cd) |
| 1138 |
{
|
|
| 1139 | 1 |
if (!global.params.is64bit && global.params.isWindows && !funcdecl.isStatic() && !sbody.usesEH() && !global.params.trace) |
| 1140 |
{
|
|
| 1141 |
/* The back end uses the "jmonitor" hack for syncing;
|
|
| 1142 |
* no need to do the sync at this level.
|
|
| 1143 |
*/
|
|
| 1144 |
}
|
|
| 1145 |
else
|
|
| 1146 |
{
|
|
| 1147 | 1 |
Expression vsync; |
| 1148 | 1 |
if (funcdecl.isStatic()) |
| 1149 |
{
|
|
| 1150 |
// The monitor is in the ClassInfo
|
|
| 1151 | 1 |
vsync = new DotIdExp(funcdecl.loc, symbolToExp(cd, funcdecl.loc, sc2, false), Id.classinfo); |
| 1152 |
}
|
|
| 1153 |
else
|
|
| 1154 |
{
|
|
| 1155 |
// 'this' is the monitor
|
|
| 1156 | 1 |
vsync = new VarExp(funcdecl.loc, funcdecl.vthis); |
| 1157 | 1 |
if (funcdecl.isThis2) |
| 1158 |
{
|
|
| 1159 |
vsync = new PtrExp(funcdecl.loc, vsync); |
|
| 1160 |
vsync = new IndexExp(funcdecl.loc, vsync, IntegerExp.literal!0); |
|
| 1161 |
}
|
|
| 1162 |
}
|
|
| 1163 | 1 |
sbody = new PeelStatement(sbody); // don't redo semantic() |
| 1164 | 1 |
sbody = new SynchronizedStatement(funcdecl.loc, vsync, sbody); |
| 1165 | 1 |
sbody = sbody.statementSemantic(sc2); |
| 1166 |
}
|
|
| 1167 |
}
|
|
| 1168 |
else
|
|
| 1169 |
{
|
|
| 1170 |
funcdecl.error("synchronized function `%s` must be a member of a class", funcdecl.toChars()); |
|
| 1171 |
}
|
|
| 1172 |
}
|
|
| 1173 |
|
|
| 1174 |
// If declaration has no body, don't set sbody to prevent incorrect codegen.
|
|
| 1175 | 1 |
if (funcdecl.fbody || funcdecl.allowsContractWithoutBody()) |
| 1176 | 1 |
funcdecl.fbody = sbody; |
| 1177 |
}
|
|
| 1178 |
|
|
| 1179 |
// Check for undefined labels
|
|
| 1180 | 1 |
if (funcdecl.labtab) |
| 1181 | 1 |
foreach (keyValue; funcdecl.labtab.tab.asRange) |
| 1182 |
{
|
|
| 1183 |
//printf(" KV: %s = %s\n", keyValue.key.toChars(), keyValue.value.toChars());
|
|
| 1184 | 1 |
LabelDsymbol label = cast(LabelDsymbol)keyValue.value; |
| 1185 | 1 |
if (!label.statement && (!label.deleted || label.iasm)) |
| 1186 |
{
|
|
| 1187 | 1 |
funcdecl.error("label `%s` is undefined", label.toChars()); |
| 1188 |
}
|
|
| 1189 |
}
|
|
| 1190 |
|
|
| 1191 |
// Fix up forward-referenced gotos
|
|
| 1192 | 1 |
if (funcdecl.gotos) |
| 1193 |
{
|
|
| 1194 | 1 |
for (size_t i = 0; i < funcdecl.gotos.dim; ++i) |
| 1195 |
{
|
|
| 1196 | 1 |
(*funcdecl.gotos)[i].checkLabel(); |
| 1197 |
}
|
|
| 1198 |
}
|
|
| 1199 |
|
|
| 1200 | 1 |
if (funcdecl.naked && (funcdecl.fensures || funcdecl.frequires)) |
| 1201 | 1 |
funcdecl.error("naked assembly functions with contracts are not supported"); |
| 1202 |
|
|
| 1203 | 1 |
sc2.ctorflow.callSuper = CSX.none; |
| 1204 | 1 |
sc2.pop(); |
| 1205 |
}
|
|
| 1206 |
|
|
| 1207 | 1 |
if (funcdecl.checkClosure()) |
| 1208 |
{
|
|
| 1209 |
// We should be setting errors here instead of relying on the global error count.
|
|
| 1210 |
//errors = true;
|
|
| 1211 |
}
|
|
| 1212 |
|
|
| 1213 |
/* If function survived being marked as impure, then it is pure
|
|
| 1214 |
*/
|
|
| 1215 | 1 |
if (funcdecl.flags & FUNCFLAG.purityInprocess) |
| 1216 |
{
|
|
| 1217 | 1 |
funcdecl.flags &= ~FUNCFLAG.purityInprocess; |
| 1218 | 1 |
if (funcdecl.type == f) |
| 1219 | 1 |
f = cast(TypeFunction)f.copy(); |
| 1220 | 1 |
f.purity = PURE.fwdref; |
| 1221 |
}
|
|
| 1222 |
|
|
| 1223 | 1 |
if (funcdecl.flags & FUNCFLAG.safetyInprocess) |
| 1224 |
{
|
|
| 1225 | 1 |
funcdecl.flags &= ~FUNCFLAG.safetyInprocess; |
| 1226 | 1 |
if (funcdecl.type == f) |
| 1227 | 1 |
f = cast(TypeFunction)f.copy(); |
| 1228 | 1 |
f.trust = TRUST.safe; |
| 1229 |
}
|
|
| 1230 |
|
|
| 1231 | 1 |
if (funcdecl.flags & FUNCFLAG.nogcInprocess) |
| 1232 |
{
|
|
| 1233 | 1 |
funcdecl.flags &= ~FUNCFLAG.nogcInprocess; |
| 1234 | 1 |
if (funcdecl.type == f) |
| 1235 | 1 |
f = cast(TypeFunction)f.copy(); |
| 1236 | 1 |
f.isnogc = true; |
| 1237 |
}
|
|
| 1238 |
|
|
| 1239 | 1 |
if (funcdecl.flags & FUNCFLAG.returnInprocess) |
| 1240 |
{
|
|
| 1241 | 1 |
funcdecl.flags &= ~FUNCFLAG.returnInprocess; |
| 1242 | 1 |
if (funcdecl.storage_class & STC.return_) |
| 1243 |
{
|
|
| 1244 | 1 |
if (funcdecl.type == f) |
| 1245 |
f = cast(TypeFunction)f.copy(); |
|
| 1246 | 1 |
f.isreturn = true; |
| 1247 | 1 |
if (funcdecl.storage_class & STC.returninferred) |
| 1248 | 1 |
f.isreturninferred = true; |
| 1249 |
}
|
|
| 1250 |
}
|
|
| 1251 |
|
|
| 1252 | 1 |
funcdecl.flags &= ~FUNCFLAG.inferScope; |
| 1253 |
|
|
| 1254 |
// Eliminate maybescope's
|
|
| 1255 |
{
|
|
| 1256 |
// Create and fill array[] with maybe candidates from the `this` and the parameters
|
|
| 1257 | 1 |
VarDeclaration[] array = void; |
| 1258 |
|
|
| 1259 | 1 |
VarDeclaration[10] tmp = void; |
| 1260 | 1 |
size_t dim = (funcdecl.vthis !is null) + (funcdecl.parameters ? funcdecl.parameters.dim : 0); |
| 1261 | 1 |
if (dim <= tmp.length) |
| 1262 | 1 |
array = tmp[0 .. dim]; |
| 1263 |
else
|
|
| 1264 |
{
|
|
| 1265 | 1 |
auto ptr = cast(VarDeclaration*)mem.xmalloc(dim * VarDeclaration.sizeof); |
| 1266 | 1 |
array = ptr[0 .. dim]; |
| 1267 |
}
|
|
| 1268 | 1 |
size_t n = 0; |
| 1269 | 1 |
if (funcdecl.vthis) |
| 1270 | 1 |
array[n++] = funcdecl.vthis; |
| 1271 | 1 |
if (funcdecl.parameters) |
| 1272 |
{
|
|
| 1273 | 1 |
foreach (v; *funcdecl.parameters) |
| 1274 |
{
|
|
| 1275 | 1 |
array[n++] = v; |
| 1276 |
}
|
|
| 1277 |
}
|
|
| 1278 |
|
|
| 1279 | 1 |
eliminateMaybeScopes(array[0 .. n]); |
| 1280 |
|
|
| 1281 | 1 |
if (dim > tmp.length) |
| 1282 | 1 |
mem.xfree(array.ptr); |
| 1283 |
}
|
|
| 1284 |
|
|
| 1285 |
// Infer STC.scope_
|
|
| 1286 | 1 |
if (funcdecl.parameters && !funcdecl.errors) |
| 1287 |
{
|
|
| 1288 | 1 |
assert(f.parameterList.length == funcdecl.parameters.dim); |
| 1289 | 1 |
foreach (u, p; f.parameterList) |
| 1290 |
{
|
|
| 1291 | 1 |
auto v = (*funcdecl.parameters)[u]; |
| 1292 | 1 |
if (v.storage_class & STC.maybescope) |
| 1293 |
{
|
|
| 1294 |
//printf("Inferring scope for %s\n", v.toChars());
|
|
| 1295 | 1 |
notMaybeScope(v); |
| 1296 | 1 |
v.storage_class |= STC.scope_ | STC.scopeinferred; |
| 1297 | 1 |
p.storageClass |= STC.scope_ | STC.scopeinferred; |
| 1298 | 1 |
assert(!(p.storageClass & STC.maybescope)); |
| 1299 |
}
|
|
| 1300 |
}
|
|
| 1301 |
}
|
|
| 1302 |
|
|
| 1303 | 1 |
if (funcdecl.vthis && funcdecl.vthis.storage_class & STC.maybescope) |
| 1304 |
{
|
|
| 1305 | 1 |
notMaybeScope(funcdecl.vthis); |
| 1306 | 1 |
funcdecl.vthis.storage_class |= STC.scope_ | STC.scopeinferred; |
| 1307 | 1 |
f.isScopeQual = true; |
| 1308 | 1 |
f.isscopeinferred = true; |
| 1309 |
}
|
|
| 1310 |
|
|
| 1311 |
// reset deco to apply inference result to mangled name
|
|
| 1312 | 1 |
if (f != funcdecl.type) |
| 1313 | 1 |
f.deco = null; |
| 1314 |
|
|
| 1315 |
// Do semantic type AFTER pure/nothrow inference.
|
|
| 1316 | 1 |
if (!f.deco && funcdecl.ident != Id.xopEquals && funcdecl.ident != Id.xopCmp) |
| 1317 |
{
|
|
| 1318 | 1 |
sc = sc.push(); |
| 1319 | 1 |
if (funcdecl.isCtorDeclaration()) // https://issues.dlang.org/show_bug.cgi?id=#15665 |
| 1320 | 1 |
sc.flags |= SCOPE.ctor; |
| 1321 | 1 |
sc.stc = 0; |
| 1322 | 1 |
sc.linkage = funcdecl.linkage; // https://issues.dlang.org/show_bug.cgi?id=8496 |
| 1323 | 1 |
funcdecl.type = f.typeSemantic(funcdecl.loc, sc); |
| 1324 | 1 |
sc = sc.pop(); |
| 1325 |
}
|
|
| 1326 |
|
|
| 1327 |
// Do live analysis
|
|
| 1328 | 1 |
if (global.params.useDIP1021 && funcdecl.fbody && funcdecl.type.ty != Terror && |
| 1329 | 1 |
funcdecl.type.isTypeFunction().islive) |
| 1330 |
{
|
|
| 1331 | 1 |
oblive(funcdecl); |
| 1332 |
}
|
|
| 1333 |
|
|
| 1334 |
/* If this function had instantiated with gagging, error reproduction will be
|
|
| 1335 |
* done by TemplateInstance::semantic.
|
|
| 1336 |
* Otherwise, error gagging should be temporarily ungagged by functionSemantic3.
|
|
| 1337 |
*/
|
|
| 1338 | 1 |
funcdecl.semanticRun = PASS.semantic3done; |
| 1339 | 1 |
funcdecl.semantic3Errors = (global.errors != oldErrors) || (funcdecl.fbody && funcdecl.fbody.isErrorStatement()); |
| 1340 | 1 |
if (funcdecl.type.ty == Terror) |
| 1341 | 1 |
funcdecl.errors = true; |
| 1342 |
//printf("-FuncDeclaration::semantic3('%s.%s', sc = %p, loc = %s)\n", parent.toChars(), toChars(), sc, loc.toChars());
|
|
| 1343 |
//fflush(stdout);
|
|
| 1344 |
}
|
|
| 1345 |
|
|
| 1346 |
override void visit(CtorDeclaration ctor) |
|
| 1347 |
{
|
|
| 1348 |
//printf("CtorDeclaration()\n%s\n", ctor.fbody.toChars());
|
|
| 1349 | 1 |
if (ctor.semanticRun >= PASS.semantic3) |
| 1350 | 1 |
return; |
| 1351 |
|
|
| 1352 |
/* If any of the fields of the aggregate have a destructor, add
|
|
| 1353 |
* scope (failure) { this.fieldDtor(); }
|
|
| 1354 |
* as the first statement. It is not necessary to add it after
|
|
| 1355 |
* each initialization of a field, because destruction of .init constructed
|
|
| 1356 |
* structs should be benign.
|
|
| 1357 |
* https://issues.dlang.org/show_bug.cgi?id=14246
|
|
| 1358 |
*/
|
|
| 1359 | 1 |
AggregateDeclaration ad = ctor.isMemberDecl(); |
| 1360 | 1 |
if (ad && ad.fieldDtor && global.params.dtorFields) |
| 1361 |
{
|
|
| 1362 |
/* Generate:
|
|
| 1363 |
* this.fieldDtor()
|
|
| 1364 |
*/
|
|
| 1365 | 1 |
Expression e = new ThisExp(ctor.loc); |
| 1366 | 1 |
e.type = ad.type.mutableOf(); |
| 1367 | 1 |
e = new DotVarExp(ctor.loc, e, ad.fieldDtor, false); |
| 1368 | 1 |
e = new CallExp(ctor.loc, e); |
| 1369 | 1 |
auto sexp = new ExpStatement(ctor.loc, e); |
| 1370 | 1 |
auto ss = new ScopeStatement(ctor.loc, sexp, ctor.loc); |
| 1371 |
|
|
| 1372 |
version (all) |
|
| 1373 |
{
|
|
| 1374 |
/* Generate:
|
|
| 1375 |
* try { ctor.fbody; }
|
|
| 1376 |
* catch (Exception __o)
|
|
| 1377 |
* { this.fieldDtor(); throw __o; }
|
|
| 1378 |
* This differs from the alternate scope(failure) version in that an Exception
|
|
| 1379 |
* is caught rather than a Throwable. This enables the optimization whereby
|
|
| 1380 |
* the try-catch can be removed if ctor.fbody is nothrow. (nothrow only
|
|
| 1381 |
* applies to Exception.)
|
|
| 1382 |
*/
|
|
| 1383 | 1 |
Identifier id = Identifier.generateId("__o"); |
| 1384 | 1 |
auto ts = new ThrowStatement(ctor.loc, new IdentifierExp(ctor.loc, id)); |
| 1385 | 1 |
auto handler = new CompoundStatement(ctor.loc, ss, ts); |
| 1386 |
|
|
| 1387 | 1 |
auto catches = new Catches(); |
| 1388 | 1 |
auto ctch = new Catch(ctor.loc, getException(), id, handler); |
| 1389 | 1 |
catches.push(ctch); |
| 1390 |
|
|
| 1391 | 1 |
ctor.fbody = new TryCatchStatement(ctor.loc, ctor.fbody, catches); |
| 1392 |
}
|
|
| 1393 |
else
|
|
| 1394 |
{
|
|
| 1395 |
/* Generate:
|
|
| 1396 |
* scope (failure) { this.fieldDtor(); }
|
|
| 1397 |
* Hopefully we can use this version someday when scope(failure) catches
|
|
| 1398 |
* Exception instead of Throwable.
|
|
| 1399 |
*/
|
|
| 1400 |
auto s = new ScopeGuardStatement(ctor.loc, TOK.onScopeFailure, ss); |
|
| 1401 |
ctor.fbody = new CompoundStatement(ctor.loc, s, ctor.fbody); |
|
| 1402 |
}
|
|
| 1403 |
}
|
|
| 1404 | 1 |
visit(cast(FuncDeclaration)ctor); |
| 1405 |
}
|
|
| 1406 |
|
|
| 1407 |
|
|
| 1408 |
override void visit(Nspace ns) |
|
| 1409 |
{
|
|
| 1410 | 1 |
if (ns.semanticRun >= PASS.semantic3) |
| 1411 |
return; |
|
| 1412 | 1 |
ns.semanticRun = PASS.semantic3; |
| 1413 |
static if (LOG) |
|
| 1414 |
{
|
|
| 1415 |
printf("Nspace::semantic3('%s')\n", ns.toChars()); |
|
| 1416 |
}
|
|
| 1417 | 1 |
if (ns.members) |
| 1418 |
{
|
|
| 1419 | 1 |
sc = sc.push(ns); |
| 1420 | 1 |
sc.linkage = LINK.cpp; |
| 1421 | 1 |
foreach (s; *ns.members) |
| 1422 |
{
|
|
| 1423 | 1 |
s.semantic3(sc); |
| 1424 |
}
|
|
| 1425 | 1 |
sc.pop(); |
| 1426 |
}
|
|
| 1427 |
}
|
|
| 1428 |
|
|
| 1429 |
override void visit(AttribDeclaration ad) |
|
| 1430 |
{
|
|
| 1431 | 1 |
Dsymbols* d = ad.include(sc); |
| 1432 | 1 |
if (d) |
| 1433 |
{
|
|
| 1434 | 1 |
Scope* sc2 = ad.newScope(sc); |
| 1435 | 1 |
for (size_t i = 0; i < d.dim; i++) |
| 1436 |
{
|
|
| 1437 | 1 |
Dsymbol s = (*d)[i]; |
| 1438 | 1 |
s.semantic3(sc2); |
| 1439 |
}
|
|
| 1440 | 1 |
if (sc2 != sc) |
| 1441 | 1 |
sc2.pop(); |
| 1442 |
}
|
|
| 1443 |
}
|
|
| 1444 |
|
|
| 1445 |
override void visit(AggregateDeclaration ad) |
|
| 1446 |
{
|
|
| 1447 |
//printf("AggregateDeclaration::semantic3(sc=%p, %s) type = %s, errors = %d\n", sc, toChars(), type.toChars(), errors);
|
|
| 1448 | 1 |
if (!ad.members) |
| 1449 | 1 |
return; |
| 1450 |
|
|
| 1451 | 1 |
StructDeclaration sd = ad.isStructDeclaration(); |
| 1452 | 1 |
if (!sc) // from runDeferredSemantic3 for TypeInfo generation |
| 1453 |
{
|
|
| 1454 | 1 |
assert(sd); |
| 1455 | 1 |
sd.semanticTypeInfoMembers(); |
| 1456 | 1 |
return; |
| 1457 |
}
|
|
| 1458 |
|
|
| 1459 | 1 |
auto sc2 = ad.newScope(sc); |
| 1460 |
|
|
| 1461 | 1 |
for (size_t i = 0; i < ad.members.dim; i++) |
| 1462 |
{
|
|
| 1463 | 1 |
Dsymbol s = (*ad.members)[i]; |
| 1464 | 1 |
s.semantic3(sc2); |
| 1465 |
}
|
|
| 1466 |
|
|
| 1467 | 1 |
sc2.pop(); |
| 1468 |
|
|
| 1469 |
// don't do it for unused deprecated types
|
|
| 1470 |
// or error ypes
|
|
| 1471 | 1 |
if (!ad.getRTInfo && Type.rtinfo && (!ad.isDeprecated() || global.params.useDeprecated != DiagnosticReporting.error) && (ad.type && ad.type.ty != Terror)) |
| 1472 |
{
|
|
| 1473 |
// Evaluate: RTinfo!type
|
|
| 1474 | 1 |
auto tiargs = new Objects(); |
| 1475 | 1 |
tiargs.push(ad.type); |
| 1476 | 1 |
auto ti = Pool!TemplateInstance.make(ad.loc, Type.rtinfo, tiargs); |
| 1477 |
|
|
| 1478 | 1 |
Scope* sc3 = ti.tempdecl._scope.startCTFE(); |
| 1479 | 1 |
sc3.tinst = sc.tinst; |
| 1480 | 1 |
sc3.minst = sc.minst; |
| 1481 | 1 |
if (ad.isDeprecated()) |
| 1482 | 1 |
sc3.stc |= STC.deprecated_; |
| 1483 |
|
|
| 1484 | 1 |
ti.dsymbolSemantic(sc3); |
| 1485 | 1 |
ti.semantic2(sc3); |
| 1486 | 1 |
ti.semantic3(sc3); |
| 1487 | 1 |
auto e = symbolToExp(ti.toAlias(), Loc.initial, sc3, false); |
| 1488 |
|
|
| 1489 | 1 |
sc3.endCTFE(); |
| 1490 |
|
|
| 1491 | 1 |
e = e.ctfeInterpret(); |
| 1492 | 1 |
ad.getRTInfo = e; |
| 1493 |
}
|
|
| 1494 | 1 |
if (sd) |
| 1495 | 1 |
sd.semanticTypeInfoMembers(); |
| 1496 | 1 |
ad.semanticRun = PASS.semantic3done; |
| 1497 |
}
|
|
| 1498 |
}
|
|
| 1499 |
|
|
| 1500 |
private struct FuncDeclSem3 |
|
| 1501 |
{
|
|
| 1502 |
// The FuncDeclaration subject to Semantic analysis
|
|
| 1503 |
FuncDeclaration funcdecl; |
|
| 1504 |
|
|
| 1505 |
// Scope of analysis
|
|
| 1506 |
Scope* sc; |
|
| 1507 | 1 |
this(FuncDeclaration fd,Scope* s) |
| 1508 |
{
|
|
| 1509 | 1 |
funcdecl = fd; |
| 1510 | 1 |
sc = s; |
| 1511 |
}
|
|
| 1512 |
|
|
| 1513 |
/* Checks that the overriden functions (if any) have in contracts if
|
|
| 1514 |
* funcdecl has an in contract.
|
|
| 1515 |
*/
|
|
| 1516 |
void checkInContractOverrides() |
|
| 1517 |
{
|
|
| 1518 | 1 |
if (funcdecl.frequires) |
| 1519 |
{
|
|
| 1520 | 1 |
for (size_t i = 0; i < funcdecl.foverrides.dim; i++) |
| 1521 |
{
|
|
| 1522 | 1 |
FuncDeclaration fdv = funcdecl.foverrides[i]; |
| 1523 | 1 |
if (fdv.fbody && !fdv.frequires) |
| 1524 |
{
|
|
| 1525 | 1 |
funcdecl.error("cannot have an in contract when overridden function `%s` does not have an in contract", fdv.toPrettyChars()); |
| 1526 | 1 |
break; |
| 1527 |
}
|
|
| 1528 |
}
|
|
| 1529 |
}
|
|
| 1530 |
}
|
|
| 1531 |
}
|
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