| /** |
| * Performs the semantic3 stage, which deals with function bodies. |
| * |
| * Copyright: Copyright (C) 1999-2023 by The D Language Foundation, All Rights Reserved |
| * Authors: $(LINK2 https://www.digitalmars.com, Walter Bright) |
| * License: $(LINK2 https://www.boost.org/LICENSE_1_0.txt, Boost License 1.0) |
| * Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/semantic3.d, _semantic3.d) |
| * Documentation: https://dlang.org/phobos/dmd_semantic3.html |
| * Coverage: https://codecov.io/gh/dlang/dmd/src/master/src/dmd/semantic3.d |
| */ |
| |
| module dmd.semantic3; |
| |
| import core.stdc.stdio; |
| import core.stdc.string; |
| |
| import dmd.aggregate; |
| import dmd.aliasthis; |
| import dmd.arraytypes; |
| import dmd.astcodegen; |
| import dmd.astenums; |
| import dmd.attrib; |
| import dmd.blockexit; |
| import dmd.clone; |
| import dmd.ctorflow; |
| import dmd.dcast; |
| import dmd.dclass; |
| import dmd.declaration; |
| import dmd.denum; |
| import dmd.dimport; |
| import dmd.dinterpret; |
| import dmd.dmodule; |
| import dmd.dscope; |
| import dmd.dstruct; |
| import dmd.dsymbol; |
| import dmd.dsymbolsem; |
| import dmd.dtemplate; |
| import dmd.dversion; |
| import dmd.errors; |
| import dmd.escape; |
| import dmd.expression; |
| import dmd.expressionsem; |
| import dmd.func; |
| import dmd.globals; |
| import dmd.id; |
| import dmd.identifier; |
| import dmd.init; |
| import dmd.initsem; |
| import dmd.hdrgen; |
| import dmd.location; |
| import dmd.mtype; |
| import dmd.nogc; |
| import dmd.nspace; |
| import dmd.ob; |
| import dmd.objc; |
| import dmd.opover; |
| import dmd.parse; |
| import dmd.root.filename; |
| import dmd.common.outbuffer; |
| import dmd.root.rmem; |
| import dmd.root.rootobject; |
| import dmd.root.utf; |
| import dmd.sideeffect; |
| import dmd.statementsem; |
| import dmd.staticassert; |
| import dmd.tokens; |
| import dmd.semantic2; |
| import dmd.statement; |
| import dmd.target; |
| import dmd.templateparamsem; |
| import dmd.typesem; |
| import dmd.visitor; |
| |
| enum LOG = false; |
| |
| |
| /************************************* |
| * Does semantic analysis on function bodies. |
| */ |
| extern(C++) void semantic3(Dsymbol dsym, Scope* sc) |
| { |
| scope v = new Semantic3Visitor(sc); |
| dsym.accept(v); |
| } |
| |
| private extern(C++) final class Semantic3Visitor : Visitor |
| { |
| alias visit = Visitor.visit; |
| |
| Scope* sc; |
| this(Scope* sc) scope |
| { |
| this.sc = sc; |
| } |
| |
| override void visit(Dsymbol) {} |
| |
| override void visit(TemplateInstance tempinst) |
| { |
| static if (LOG) |
| { |
| printf("TemplateInstance.semantic3('%s'), semanticRun = %d\n", tempinst.toChars(), tempinst.semanticRun); |
| } |
| //if (toChars()[0] == 'D') *(char*)0=0; |
| if (tempinst.semanticRun >= PASS.semantic3) |
| return; |
| tempinst.semanticRun = PASS.semantic3; |
| if (tempinst.errors || !tempinst.members) |
| return; |
| |
| TemplateDeclaration tempdecl = tempinst.tempdecl.isTemplateDeclaration(); |
| assert(tempdecl); |
| |
| sc = tempdecl._scope; |
| sc = sc.push(tempinst.argsym); |
| sc = sc.push(tempinst); |
| sc.tinst = tempinst; |
| sc.minst = tempinst.minst; |
| |
| int needGagging = (tempinst.gagged && !global.gag); |
| uint olderrors = global.errors; |
| int oldGaggedErrors = -1; // dead-store to prevent spurious warning |
| /* If this is a gagged instantiation, gag errors. |
| * Future optimisation: If the results are actually needed, errors |
| * would already be gagged, so we don't really need to run semantic |
| * on the members. |
| */ |
| if (needGagging) |
| oldGaggedErrors = global.startGagging(); |
| |
| for (size_t i = 0; i < tempinst.members.length; i++) |
| { |
| Dsymbol s = (*tempinst.members)[i]; |
| s.semantic3(sc); |
| if (tempinst.gagged && global.errors != olderrors) |
| break; |
| } |
| |
| if (global.errors != olderrors) |
| { |
| if (!tempinst.errors) |
| { |
| if (!tempdecl.literal) |
| tempinst.error(tempinst.loc, "error instantiating"); |
| if (tempinst.tinst) |
| tempinst.tinst.printInstantiationTrace(); |
| } |
| tempinst.errors = true; |
| } |
| if (needGagging) |
| global.endGagging(oldGaggedErrors); |
| |
| sc = sc.pop(); |
| sc.pop(); |
| } |
| |
| override void visit(TemplateMixin tmix) |
| { |
| if (tmix.semanticRun >= PASS.semantic3) |
| return; |
| tmix.semanticRun = PASS.semantic3; |
| static if (LOG) |
| { |
| printf("TemplateMixin.semantic3('%s')\n", tmix.toChars()); |
| } |
| if (!tmix.members) |
| return; |
| |
| sc = sc.push(tmix.argsym); |
| sc = sc.push(tmix); |
| |
| uint olderrors = global.errors; |
| |
| for (size_t i = 0; i < tmix.members.length; i++) |
| { |
| Dsymbol s = (*tmix.members)[i]; |
| s.semantic3(sc); |
| } |
| |
| if (global.errors != olderrors) |
| errorSupplemental(tmix.loc, "parent scope from here: `mixin %s`", tmix.toChars()); |
| |
| sc = sc.pop(); |
| sc.pop(); |
| } |
| |
| override void visit(Module mod) |
| { |
| //printf("Module::semantic3('%s'): parent = %p\n", toChars(), parent); |
| if (mod.semanticRun != PASS.semantic2done) |
| return; |
| mod.semanticRun = PASS.semantic3; |
| // Note that modules get their own scope, from scratch. |
| // This is so regardless of where in the syntax a module |
| // gets imported, it is unaffected by context. |
| Scope* sc = Scope.createGlobal(mod); // create root scope |
| //printf("Module = %p\n", sc.scopesym); |
| if (mod.members) |
| { |
| // Pass 3 semantic routines: do initializers and function bodies |
| for (size_t i = 0; i < mod.members.length; i++) |
| { |
| Dsymbol s = (*mod.members)[i]; |
| //printf("Module %s: %s.semantic3()\n", toChars(), s.toChars()); |
| s.semantic3(sc); |
| |
| mod.runDeferredSemantic2(); |
| } |
| } |
| if (mod.userAttribDecl) |
| { |
| mod.userAttribDecl.semantic3(sc); |
| } |
| sc = sc.pop(); |
| sc.pop(); |
| mod.semanticRun = PASS.semantic3done; |
| } |
| |
| override void visit(FuncDeclaration funcdecl) |
| { |
| //printf("FuncDeclaration::semantic3(%s '%s', sc = %p)\n", funcdecl.kind(), funcdecl.toChars(), sc); |
| /* Determine if function should add `return 0;` |
| */ |
| bool addReturn0() |
| { |
| //printf("addReturn0()\n"); |
| auto f = funcdecl.type.isTypeFunction(); |
| |
| // C11 5.1.2.2.3 |
| if (sc.flags & SCOPE.Cfile && funcdecl.isCMain() && f.next.ty == Tint32) |
| return true; |
| |
| return f.next.ty == Tvoid && |
| (funcdecl.isMain() || global.params.betterC && funcdecl.isCMain()); |
| } |
| |
| VarDeclaration _arguments = null; |
| |
| if (!funcdecl.parent) |
| { |
| if (global.errors) |
| return; |
| //printf("FuncDeclaration::semantic3(%s '%s', sc = %p)\n", kind(), toChars(), sc); |
| assert(0); |
| } |
| if (funcdecl.errors || isError(funcdecl.parent)) |
| { |
| funcdecl.errors = true; |
| |
| // Mark that the return type could not be inferred |
| if (funcdecl.inferRetType) |
| { |
| assert(funcdecl.type); |
| auto tf = funcdecl.type.isTypeFunction(); |
| |
| // Only change the return type s.t. other analysis is |
| // still possible e.g. missmatched parameter types |
| if (tf && !tf.next) |
| tf.next = Type.terror; |
| } |
| return; |
| } |
| //printf("FuncDeclaration::semantic3('%s.%s', %p, sc = %p, loc = %s)\n", funcdecl.parent.toChars(), funcdecl.toChars(), funcdecl, sc, funcdecl.loc.toChars()); |
| //fflush(stdout); |
| //printf("storage class = x%x %x\n", sc.stc, storage_class); |
| //{ static int x; if (++x == 2) *(char*)0=0; } |
| //printf("\tlinkage = %d\n", sc.linkage); |
| |
| if (funcdecl.ident == Id.assign && !funcdecl.inuse) |
| { |
| if (funcdecl.storage_class & STC.inference) |
| { |
| /* https://issues.dlang.org/show_bug.cgi?id=15044 |
| * For generated opAssign function, any errors |
| * from its body need to be gagged. |
| */ |
| uint oldErrors = global.startGagging(); |
| ++funcdecl.inuse; |
| funcdecl.semantic3(sc); |
| --funcdecl.inuse; |
| if (global.endGagging(oldErrors)) // if errors happened |
| { |
| // Disable generated opAssign, because some members forbid identity assignment. |
| funcdecl.storage_class |= STC.disable; |
| funcdecl.fbody = null; // remove fbody which contains the error |
| funcdecl.hasSemantic3Errors = false; |
| } |
| return; |
| } |
| } |
| |
| //printf(" sc.incontract = %d\n", (sc.flags & SCOPE.contract)); |
| if (funcdecl.semanticRun >= PASS.semantic3) |
| return; |
| funcdecl.semanticRun = PASS.semantic3; |
| funcdecl.hasSemantic3Errors = false; |
| |
| if (!funcdecl.type || funcdecl.type.ty != Tfunction) |
| return; |
| TypeFunction f = cast(TypeFunction)funcdecl.type; |
| if (!funcdecl.inferRetType && f.next.ty == Terror) |
| return; |
| |
| if (!funcdecl.fbody && funcdecl.inferRetType && !f.next) |
| { |
| funcdecl.error("has no function body with return type inference"); |
| return; |
| } |
| |
| uint oldErrors = global.errors; |
| auto fds = FuncDeclSem3(funcdecl,sc); |
| |
| fds.checkInContractOverrides(); |
| |
| // Remember whether we need to generate an 'out' contract. |
| immutable bool needEnsure = FuncDeclaration.needsFensure(funcdecl); |
| |
| if (funcdecl.fbody || funcdecl.frequires || needEnsure) |
| { |
| /* Symbol table into which we place parameters and nested functions, |
| * solely to diagnose name collisions. |
| */ |
| funcdecl.localsymtab = new DsymbolTable(); |
| |
| // Establish function scope |
| auto ss = new ScopeDsymbol(funcdecl.loc, null); |
| // find enclosing scope symbol, might skip symbol-less CTFE and/or FuncExp scopes |
| ss.parent = sc.inner().scopesym; |
| ss.endlinnum = funcdecl.endloc.linnum; |
| Scope* sc2 = sc.push(ss); |
| sc2.func = funcdecl; |
| sc2.parent = funcdecl; |
| sc2.ctorflow.callSuper = CSX.none; |
| sc2.sbreak = null; |
| sc2.scontinue = null; |
| sc2.sw = null; |
| sc2.fes = funcdecl.fes; |
| sc2.linkage = funcdecl.isCsymbol() ? LINK.c : LINK.d; |
| sc2.stc &= STC.flowThruFunction; |
| sc2.visibility = Visibility(Visibility.Kind.public_); |
| sc2.explicitVisibility = 0; |
| sc2.aligndecl = null; |
| if (funcdecl.ident != Id.require && funcdecl.ident != Id.ensure) |
| sc2.flags = sc.flags & ~SCOPE.contract; |
| sc2.tf = null; |
| sc2.os = null; |
| sc2.inLoop = false; |
| sc2.userAttribDecl = null; |
| if (sc2.intypeof == 1) |
| sc2.intypeof = 2; |
| sc2.ctorflow.fieldinit = null; |
| |
| /* Note: When a lambda is defined immediately under aggregate member |
| * scope, it should be contextless due to prevent interior pointers. |
| * e.g. |
| * // dg points 'this' - its interior pointer |
| * class C { int x; void delegate() dg = (){ this.x = 1; }; } |
| * |
| * However, lambdas could be used inside typeof, in order to check |
| * some expressions validity at compile time. For such case the lambda |
| * body can access aggregate instance members. |
| * e.g. |
| * class C { int x; static assert(is(typeof({ this.x = 1; }))); } |
| * |
| * To properly accept it, mark these lambdas as member functions. |
| */ |
| if (auto fld = funcdecl.isFuncLiteralDeclaration()) |
| { |
| if (auto ad = funcdecl.isMember2()) |
| { |
| if (!sc.intypeof) |
| { |
| if (fld.tok == TOK.delegate_) |
| funcdecl.error("cannot be %s members", ad.kind()); |
| else |
| fld.tok = TOK.function_; |
| } |
| else |
| { |
| if (fld.tok != TOK.function_) |
| fld.tok = TOK.delegate_; |
| } |
| } |
| } |
| |
| funcdecl.declareThis(sc2); |
| |
| // Reverts: https://issues.dlang.org/show_bug.cgi?id=5710 |
| // No compiler supports this, and there was never any spec for it. |
| // @@@DEPRECATED_2.116@@@ |
| // Deprecated in 2.096, can be made an error in 2.116. |
| // The deprecation period is longer than usual as dual-context |
| // functions may be widely used by dmd-compiled projects. |
| // It also gives more time for the implementation of dual-context |
| // functions to be reworked as a frontend-only feature. |
| if (funcdecl.hasDualContext()) |
| { |
| funcdecl.deprecation("function requires a dual-context, which is deprecated"); |
| if (auto ti = sc2.parent ? sc2.parent.isInstantiated() : null) |
| ti.printInstantiationTrace(Classification.deprecation); |
| } |
| |
| //printf("[%s] ad = %p vthis = %p\n", loc.toChars(), ad, vthis); |
| //if (vthis) printf("\tvthis.type = %s\n", vthis.type.toChars()); |
| |
| // Declare hidden variable _arguments[] and _argptr |
| if (f.parameterList.varargs == VarArg.variadic) |
| { |
| if (f.linkage == LINK.d) |
| { |
| // Variadic arguments depend on Typeinfo being defined. |
| if (!global.params.useTypeInfo || !Type.dtypeinfo || !Type.typeinfotypelist) |
| { |
| if (!global.params.useTypeInfo) |
| funcdecl.error("D-style variadic functions cannot be used with -betterC"); |
| else if (!Type.typeinfotypelist) |
| funcdecl.error("`object.TypeInfo_Tuple` could not be found, but is implicitly used in D-style variadic functions"); |
| else |
| funcdecl.error("`object.TypeInfo` could not be found, but is implicitly used in D-style variadic functions"); |
| fatal(); |
| } |
| |
| // Declare _arguments[] |
| funcdecl.v_arguments = new VarDeclaration(funcdecl.loc, Type.typeinfotypelist.type, Id._arguments_typeinfo, null); |
| funcdecl.v_arguments.storage_class |= STC.temp | STC.parameter; |
| funcdecl.v_arguments.dsymbolSemantic(sc2); |
| sc2.insert(funcdecl.v_arguments); |
| funcdecl.v_arguments.parent = funcdecl; |
| |
| //Type t = Type.dtypeinfo.type.constOf().arrayOf(); |
| Type t = Type.dtypeinfo.type.arrayOf(); |
| _arguments = new VarDeclaration(funcdecl.loc, t, Id._arguments, null); |
| _arguments.storage_class |= STC.temp; |
| _arguments.dsymbolSemantic(sc2); |
| sc2.insert(_arguments); |
| _arguments.parent = funcdecl; |
| } |
| if (f.linkage == LINK.d || f.parameterList.length) |
| { |
| // Declare _argptr |
| Type t = target.va_listType(funcdecl.loc, sc); |
| // Init is handled in FuncDeclaration_toObjFile |
| funcdecl.v_argptr = new VarDeclaration(funcdecl.loc, t, Id._argptr, new VoidInitializer(funcdecl.loc)); |
| funcdecl.v_argptr.storage_class |= STC.temp; |
| funcdecl.v_argptr.dsymbolSemantic(sc2); |
| sc2.insert(funcdecl.v_argptr); |
| funcdecl.v_argptr.parent = funcdecl; |
| } |
| } |
| |
| /* Declare all the function parameters as variables |
| * and install them in parameters[] |
| */ |
| if (const nparams = f.parameterList.length) |
| { |
| /* parameters[] has all the tuples removed, as the back end |
| * doesn't know about tuples |
| */ |
| funcdecl.parameters = new VarDeclarations(); |
| funcdecl.parameters.reserve(nparams); |
| foreach (i, fparam; f.parameterList) |
| { |
| Identifier id = fparam.ident; |
| StorageClass stc = 0; |
| if (!id) |
| { |
| /* Generate identifier for un-named parameter, |
| * because we need it later on. |
| */ |
| fparam.ident = id = Identifier.generateId("_param_", i); |
| stc |= STC.temp; |
| } |
| Type vtype = fparam.type; |
| auto v = new VarDeclaration(funcdecl.loc, vtype, id, null); |
| //printf("declaring parameter %s of type %s\n", v.toChars(), v.type.toChars()); |
| stc |= STC.parameter; |
| if (f.parameterList.varargs == VarArg.typesafe && i + 1 == nparams) |
| { |
| stc |= STC.variadic; |
| } |
| |
| stc |= fparam.storageClass & (STC.IOR | STC.return_ | STC.scope_ | STC.lazy_ | STC.final_ | STC.TYPECTOR | STC.nodtor | STC.returnScope | STC.register); |
| v.storage_class = stc; |
| v.dsymbolSemantic(sc2); |
| if (!sc2.insert(v)) |
| { |
| funcdecl.error("parameter `%s.%s` is already defined", funcdecl.toChars(), v.toChars()); |
| funcdecl.errors = true; |
| } |
| else |
| funcdecl.parameters.push(v); |
| funcdecl.localsymtab.insert(v); |
| v.parent = funcdecl; |
| if (fparam.userAttribDecl) |
| v.userAttribDecl = fparam.userAttribDecl; |
| } |
| } |
| |
| // Declare the tuple symbols and put them in the symbol table, |
| // but not in parameters[]. |
| if (f.parameterList.parameters) |
| foreach (fparam; *f.parameterList.parameters) |
| { |
| if (!fparam.ident) |
| continue; // never used, so ignore |
| // expand any tuples |
| if (fparam.type.ty != Ttuple) |
| continue; |
| |
| TypeTuple t = cast(TypeTuple)fparam.type; |
| size_t dim = Parameter.dim(t.arguments); |
| auto exps = new Objects(dim); |
| foreach (j; 0 .. dim) |
| { |
| Parameter narg = Parameter.getNth(t.arguments, j); |
| assert(narg.ident); |
| VarDeclaration v = sc2.search(Loc.initial, narg.ident, null).isVarDeclaration(); |
| assert(v); |
| (*exps)[j] = new VarExp(v.loc, v); |
| } |
| assert(fparam.ident); |
| auto v = new TupleDeclaration(funcdecl.loc, fparam.ident, exps); |
| //printf("declaring tuple %s\n", v.toChars()); |
| v.isexp = true; |
| if (!sc2.insert(v)) |
| funcdecl.error("parameter `%s.%s` is already defined", funcdecl.toChars(), v.toChars()); |
| funcdecl.localsymtab.insert(v); |
| v.parent = funcdecl; |
| } |
| |
| // Precondition invariant |
| Statement fpreinv = null; |
| if (funcdecl.addPreInvariant()) |
| { |
| Expression e = addInvariant(funcdecl.isThis(), funcdecl.vthis); |
| if (e) |
| fpreinv = new ExpStatement(Loc.initial, e); |
| } |
| |
| // Postcondition invariant |
| Statement fpostinv = null; |
| if (funcdecl.addPostInvariant()) |
| { |
| Expression e = addInvariant(funcdecl.isThis(), funcdecl.vthis); |
| if (e) |
| fpostinv = new ExpStatement(Loc.initial, e); |
| } |
| |
| // Pre/Postcondition contract |
| if (!funcdecl.fbody) |
| funcdecl.buildEnsureRequire(); |
| |
| Scope* scout = null; |
| if (needEnsure || funcdecl.addPostInvariant()) |
| { |
| /* https://issues.dlang.org/show_bug.cgi?id=3657 |
| * Set the correct end line number for fensure scope. |
| */ |
| uint fensure_endlin = funcdecl.endloc.linnum; |
| if (funcdecl.fensure) |
| if (auto s = funcdecl.fensure.isScopeStatement()) |
| fensure_endlin = s.endloc.linnum; |
| |
| if ((needEnsure && global.params.useOut == CHECKENABLE.on) || fpostinv) |
| { |
| funcdecl.returnLabel = funcdecl.searchLabel(Id.returnLabel); |
| } |
| |
| // scope of out contract (need for vresult.semantic) |
| auto sym = new ScopeDsymbol(funcdecl.loc, null); |
| sym.parent = sc2.scopesym; |
| sym.endlinnum = fensure_endlin; |
| scout = sc2.push(sym); |
| } |
| |
| if (funcdecl.fbody) |
| { |
| auto sym = new ScopeDsymbol(funcdecl.loc, null); |
| sym.parent = sc2.scopesym; |
| sym.endlinnum = funcdecl.endloc.linnum; |
| sc2 = sc2.push(sym); |
| |
| auto ad2 = funcdecl.isMemberLocal(); |
| |
| /* If this is a class constructor |
| */ |
| if (ad2 && funcdecl.isCtorDeclaration()) |
| { |
| sc2.ctorflow.allocFieldinit(ad2.fields.length); |
| foreach (v; ad2.fields) |
| { |
| v.ctorinit = 0; |
| } |
| } |
| |
| bool inferRef = (f.isref && (funcdecl.storage_class & STC.auto_)); |
| |
| funcdecl.fbody = funcdecl.fbody.statementSemantic(sc2); |
| if (!funcdecl.fbody) |
| funcdecl.fbody = new CompoundStatement(Loc.initial, new Statements()); |
| |
| if (funcdecl.isNaked()) |
| { |
| fpreinv = null; // can't accommodate with no stack frame |
| fpostinv = null; |
| } |
| |
| assert(funcdecl.type == f || (funcdecl.type.ty == Tfunction && f.purity == PURE.impure && (cast(TypeFunction)funcdecl.type).purity >= PURE.fwdref)); |
| f = cast(TypeFunction)funcdecl.type; |
| |
| if (funcdecl.inferRetType) |
| { |
| // If no return type inferred yet, then infer a void |
| if (!f.next) |
| f.next = Type.tvoid; |
| if (f.checkRetType(funcdecl.loc)) |
| funcdecl.fbody = new ErrorStatement(); |
| else |
| funcdecl.checkMain(); // Check main() parameters and return type |
| } |
| |
| if (f.next !is null) |
| f.next.checkComplexTransition(funcdecl.loc, sc); |
| |
| if (funcdecl.returns && !funcdecl.fbody.isErrorStatement()) |
| { |
| for (size_t i = 0; i < funcdecl.returns.length;) |
| { |
| Expression exp = (*funcdecl.returns)[i].exp; |
| if (exp.op == EXP.variable && (cast(VarExp)exp).var == funcdecl.vresult) |
| { |
| if (addReturn0()) |
| exp.type = Type.tint32; |
| else |
| exp.type = f.next; |
| // Remove `return vresult;` from returns |
| funcdecl.returns.remove(i); |
| continue; |
| } |
| if (inferRef && f.isref && !exp.type.constConv(f.next)) // https://issues.dlang.org/show_bug.cgi?id=13336 |
| f.isref = false; |
| i++; |
| } |
| } |
| if (f.isref) // Function returns a reference |
| { |
| if (funcdecl.storage_class & STC.auto_) |
| funcdecl.storage_class &= ~STC.auto_; |
| } |
| |
| // handle NRVO |
| if (!target.isReturnOnStack(f, funcdecl.needThis()) || !funcdecl.checkNRVO()) |
| funcdecl.isNRVO = false; |
| |
| if (funcdecl.fbody.isErrorStatement()) |
| { |
| } |
| else if (funcdecl.isStaticCtorDeclaration()) |
| { |
| /* It's a static constructor. Ensure that all |
| * ctor consts were initialized. |
| */ |
| ScopeDsymbol pd = funcdecl.toParent().isScopeDsymbol(); |
| for (size_t i = 0; i < pd.members.length; i++) |
| { |
| Dsymbol s = (*pd.members)[i]; |
| s.checkCtorConstInit(); |
| } |
| } |
| else if (ad2 && funcdecl.isCtorDeclaration()) |
| { |
| ClassDeclaration cd = ad2.isClassDeclaration(); |
| |
| // Verify that all the ctorinit fields got initialized |
| if (!(sc2.ctorflow.callSuper & CSX.this_ctor)) |
| { |
| foreach (i, v; ad2.fields) |
| { |
| if (v.isThisDeclaration()) |
| continue; |
| if (v.ctorinit == 0) |
| { |
| /* Current bugs in the flow analysis: |
| * 1. union members should not produce error messages even if |
| * not assigned to |
| * 2. structs should recognize delegating opAssign calls as well |
| * as delegating calls to other constructors |
| */ |
| if (v.isCtorinit() && !v.type.isMutable() && cd) |
| funcdecl.error("missing initializer for %s field `%s`", MODtoChars(v.type.mod), v.toChars()); |
| else if (v.storage_class & STC.nodefaultctor) |
| error(funcdecl.loc, "field `%s` must be initialized in constructor", v.toChars()); |
| else if (v.type.needsNested()) |
| error(funcdecl.loc, "field `%s` must be initialized in constructor, because it is nested struct", v.toChars()); |
| } |
| else |
| { |
| bool mustInit = (v.storage_class & STC.nodefaultctor || v.type.needsNested()); |
| if (mustInit && !(sc2.ctorflow.fieldinit[i].csx & CSX.this_ctor)) |
| { |
| funcdecl.error("field `%s` must be initialized but skipped", v.toChars()); |
| } |
| } |
| } |
| } |
| sc2.ctorflow.freeFieldinit(); |
| |
| if (cd && !(sc2.ctorflow.callSuper & CSX.any_ctor) && cd.baseClass && cd.baseClass.ctor) |
| { |
| sc2.ctorflow.callSuper = CSX.none; |
| |
| // Insert implicit super() at start of fbody |
| Type tthis = ad2.type.addMod(funcdecl.vthis.type.mod); |
| FuncDeclaration fd = resolveFuncCall(Loc.initial, sc2, cd.baseClass.ctor, null, tthis, ArgumentList(), FuncResolveFlag.quiet); |
| if (!fd) |
| { |
| funcdecl.error("no match for implicit `super()` call in constructor"); |
| } |
| else if (fd.storage_class & STC.disable) |
| { |
| funcdecl.error("cannot call `super()` implicitly because it is annotated with `@disable`"); |
| } |
| else |
| { |
| Expression e1 = new SuperExp(Loc.initial); |
| Expression e = new CallExp(Loc.initial, e1); |
| e = e.expressionSemantic(sc2); |
| Statement s = new ExpStatement(Loc.initial, e); |
| funcdecl.fbody = new CompoundStatement(Loc.initial, s, funcdecl.fbody); |
| } |
| } |
| //printf("ctorflow.callSuper = x%x\n", sc2.ctorflow.callSuper); |
| } |
| |
| /* https://issues.dlang.org/show_bug.cgi?id=17502 |
| * Wait until after the return type has been inferred before |
| * generating the contracts for this function, and merging contracts |
| * from overrides. |
| * |
| * https://issues.dlang.org/show_bug.cgi?id=17893 |
| * However should take care to generate this before inferered |
| * function attributes are applied, such as 'nothrow'. |
| * |
| * This was originally at the end of the first semantic pass, but |
| * required a fix-up to be done here for the '__result' variable |
| * type of __ensure() inside auto functions, but this didn't work |
| * if the out parameter was implicit. |
| */ |
| funcdecl.buildEnsureRequire(); |
| |
| // Check for errors related to 'nothrow'. |
| const blockexit = funcdecl.fbody.blockExit(funcdecl, f.isnothrow); |
| if (f.isnothrow && blockexit & BE.throw_) |
| error(funcdecl.loc, "%s `%s` may throw but is marked as `nothrow`", funcdecl.kind(), funcdecl.toPrettyChars()); |
| |
| if (!(blockexit & (BE.throw_ | BE.halt) || funcdecl.hasCatches)) |
| { |
| /* Don't generate unwind tables for this function |
| * https://issues.dlang.org/show_bug.cgi?id=17997 |
| */ |
| funcdecl.hasNoEH = true; |
| } |
| |
| if (funcdecl.nothrowInprocess) |
| { |
| if (funcdecl.type == f) |
| f = cast(TypeFunction)f.copy(); |
| f.isnothrow = !(blockexit & BE.throw_); |
| } |
| |
| if (funcdecl.fbody.isErrorStatement()) |
| { |
| } |
| else if (ad2 && funcdecl.isCtorDeclaration()) |
| { |
| /* Append: |
| * return this; |
| * to function body |
| */ |
| if (blockexit & BE.fallthru) |
| { |
| Statement s = new ReturnStatement(funcdecl.loc, null); |
| s = s.statementSemantic(sc2); |
| funcdecl.fbody = new CompoundStatement(funcdecl.loc, funcdecl.fbody, s); |
| funcdecl.hasReturnExp |= (funcdecl.hasReturnExp & 1 ? 16 : 1); |
| } |
| } |
| else if (funcdecl.fes) |
| { |
| // For foreach(){} body, append a return 0; |
| if (blockexit & BE.fallthru) |
| { |
| Expression e = IntegerExp.literal!0; |
| Statement s = new ReturnStatement(Loc.initial, e); |
| funcdecl.fbody = new CompoundStatement(Loc.initial, funcdecl.fbody, s); |
| funcdecl.hasReturnExp |= (funcdecl.hasReturnExp & 1 ? 16 : 1); |
| } |
| assert(!funcdecl.returnLabel); |
| } |
| else if (f.next.toBasetype().ty == Tnoreturn) |
| { |
| // Fallthrough despite being declared as noreturn? return is already rejected when evaluating the ReturnStatement |
| if (blockexit & BE.fallthru) |
| { |
| funcdecl.error("is typed as `%s` but does return", f.next.toChars()); |
| funcdecl.loc.errorSupplemental("`noreturn` functions must either throw, abort or loop indefinitely"); |
| } |
| } |
| else |
| { |
| const(bool) inlineAsm = (funcdecl.hasReturnExp & 8) != 0; |
| if ((blockexit & BE.fallthru) && f.next.ty != Tvoid && !inlineAsm && !(sc.flags & SCOPE.Cfile)) |
| { |
| if (!funcdecl.hasReturnExp) |
| funcdecl.error("has no `return` statement, but is expected to return a value of type `%s`", f.next.toChars()); |
| else |
| funcdecl.error("no `return exp;` or `assert(0);` at end of function"); |
| } |
| } |
| |
| if (funcdecl.returns) |
| { |
| bool implicit0 = addReturn0(); |
| Type tret = implicit0 ? Type.tint32 : f.next; |
| assert(tret.ty != Tvoid); |
| if (funcdecl.vresult || funcdecl.returnLabel) |
| funcdecl.buildResultVar(scout ? scout : sc2, tret); |
| |
| /* Cannot move this loop into NrvoWalker, because |
| * returns[i] may be in the nested delegate for foreach-body. |
| */ |
| for (size_t i = 0; i < funcdecl.returns.length; i++) |
| { |
| ReturnStatement rs = (*funcdecl.returns)[i]; |
| Expression exp = rs.exp; |
| if (exp.op == EXP.error) |
| continue; |
| if (tret.ty == Terror) |
| { |
| // https://issues.dlang.org/show_bug.cgi?id=13702 |
| exp = checkGC(sc2, exp); |
| continue; |
| } |
| |
| /* If the expression in the return statement (exp) cannot be implicitly |
| * converted to the return type (tret) of the function and if the |
| * type of the expression is type isolated, then it may be possible |
| * that a promotion to `immutable` or `inout` (through a cast) will |
| * match the return type. |
| */ |
| if (!exp.implicitConvTo(tret) && funcdecl.isTypeIsolated(exp.type)) |
| { |
| /* https://issues.dlang.org/show_bug.cgi?id=20073 |
| * |
| * The problem is that if the type of the returned expression (exp.type) |
| * is an aggregated declaration with an alias this, the alias this may be |
| * used for the conversion testing without it being an isolated type. |
| * |
| * To make sure this does not happen, we can test here the implicit conversion |
| * only for the aggregated declaration type by using `implicitConvToWithoutAliasThis`. |
| * The implicit conversion with alias this is taken care of later. |
| */ |
| AggregateDeclaration aggDecl = isAggregate(exp.type); |
| TypeStruct tstruct; |
| TypeClass tclass; |
| bool hasAliasThis; |
| if (aggDecl && aggDecl.aliasthis) |
| { |
| hasAliasThis = true; |
| tclass = exp.type.isTypeClass(); |
| if (!tclass) |
| tstruct = exp.type.isTypeStruct(); |
| assert(tclass || tstruct); |
| } |
| if (hasAliasThis) |
| { |
| if (tclass) |
| { |
| if ((cast(TypeClass)(exp.type.immutableOf())).implicitConvToWithoutAliasThis(tret)) |
| exp = exp.castTo(sc2, exp.type.immutableOf()); |
| else if ((cast(TypeClass)(exp.type.wildOf())).implicitConvToWithoutAliasThis(tret)) |
| exp = exp.castTo(sc2, exp.type.wildOf()); |
| } |
| else |
| { |
| if ((cast(TypeStruct)exp.type.immutableOf()).implicitConvToWithoutAliasThis(tret)) |
| exp = exp.castTo(sc2, exp.type.immutableOf()); |
| else if ((cast(TypeStruct)exp.type.immutableOf()).implicitConvToWithoutAliasThis(tret)) |
| exp = exp.castTo(sc2, exp.type.wildOf()); |
| } |
| } |
| else |
| { |
| if (exp.type.immutableOf().implicitConvTo(tret)) |
| exp = exp.castTo(sc2, exp.type.immutableOf()); |
| else if (exp.type.wildOf().implicitConvTo(tret)) |
| exp = exp.castTo(sc2, exp.type.wildOf()); |
| } |
| } |
| |
| const hasCopyCtor = exp.type.ty == Tstruct && (cast(TypeStruct)exp.type).sym.hasCopyCtor; |
| // if a copy constructor is present, the return type conversion will be handled by it |
| if (!(hasCopyCtor && exp.isLvalue())) |
| { |
| if (f.isref && !MODimplicitConv(exp.type.mod, tret.mod) && !tret.isTypeSArray()) |
| error(exp.loc, "expression `%s` of type `%s` is not implicitly convertible to return type `ref %s`", |
| exp.toChars(), exp.type.toChars(), tret.toChars()); |
| else |
| exp = exp.implicitCastTo(sc2, tret); |
| } |
| |
| if (f.isref) |
| { |
| // Function returns a reference |
| exp = exp.toLvalue(sc2, exp); |
| checkReturnEscapeRef(sc2, exp, false); |
| exp = exp.optimize(WANTvalue, /*keepLvalue*/ true); |
| } |
| else |
| { |
| exp = exp.optimize(WANTvalue); |
| |
| /* https://issues.dlang.org/show_bug.cgi?id=10789 |
| * If NRVO is not possible, all returned lvalues should call their postblits. |
| */ |
| if (!funcdecl.isNRVO()) |
| exp = doCopyOrMove(sc2, exp, f.next); |
| |
| if (tret.hasPointers()) |
| checkReturnEscape(sc2, exp, false); |
| } |
| |
| exp = checkGC(sc2, exp); |
| |
| if (funcdecl.vresult) |
| { |
| // Create: return vresult = exp; |
| exp = new BlitExp(rs.loc, funcdecl.vresult, exp); |
| exp.type = funcdecl.vresult.type; |
| |
| if (rs.caseDim) |
| exp = Expression.combine(exp, new IntegerExp(rs.caseDim)); |
| } |
| else if (funcdecl.tintro && !tret.equals(funcdecl.tintro.nextOf())) |
| { |
| exp = exp.implicitCastTo(sc2, funcdecl.tintro.nextOf()); |
| } |
| rs.exp = exp; |
| } |
| } |
| if (funcdecl.nrvo_var || funcdecl.returnLabel) |
| { |
| scope NrvoWalker nw = new NrvoWalker(); |
| nw.fd = funcdecl; |
| nw.sc = sc2; |
| nw.visitStmt(funcdecl.fbody); |
| } |
| |
| sc2 = sc2.pop(); |
| } |
| |
| if (global.params.inclusiveInContracts) |
| { |
| funcdecl.frequire = funcdecl.mergeFrequireInclusivePreview( |
| funcdecl.frequire, funcdecl.fdrequireParams); |
| } |
| else |
| { |
| funcdecl.frequire = funcdecl.mergeFrequire(funcdecl.frequire, funcdecl.fdrequireParams); |
| } |
| funcdecl.fensure = funcdecl.mergeFensure(funcdecl.fensure, Id.result, funcdecl.fdensureParams); |
| |
| Statement freq = funcdecl.frequire; |
| Statement fens = funcdecl.fensure; |
| |
| /* Do the semantic analysis on the [in] preconditions and |
| * [out] postconditions. |
| */ |
| immutable bool isnothrow = f.isnothrow && !funcdecl.nothrowInprocess; |
| if (freq) |
| { |
| /* frequire is composed of the [in] contracts |
| */ |
| auto sym = new ScopeDsymbol(funcdecl.loc, null); |
| sym.parent = sc2.scopesym; |
| sym.endlinnum = funcdecl.endloc.linnum; |
| sc2 = sc2.push(sym); |
| sc2.flags = (sc2.flags & ~SCOPE.contract) | SCOPE.require; |
| |
| // BUG: need to error if accessing out parameters |
| // BUG: need to disallow returns |
| // BUG: verify that all in and ref parameters are read |
| freq = freq.statementSemantic(sc2); |
| |
| // @@@DEPRECATED_2.111@@@ - pass `isnothrow` instead of `false` to print a more detailed error msg` |
| const blockExit = freq.blockExit(funcdecl, false); |
| if (blockExit & BE.throw_) |
| { |
| if (isnothrow) |
| // @@@DEPRECATED_2.111@@@ |
| // Deprecated in 2.101, can be made an error in 2.111 |
| deprecation(funcdecl.loc, "`%s`: `in` contract may throw but function is marked as `nothrow`", |
| funcdecl.toPrettyChars()); |
| else if (funcdecl.nothrowInprocess) |
| f.isnothrow = false; |
| } |
| |
| funcdecl.hasNoEH = false; |
| |
| sc2 = sc2.pop(); |
| |
| if (global.params.useIn == CHECKENABLE.off) |
| freq = null; |
| } |
| |
| if (fens) |
| { |
| /* fensure is composed of the [out] contracts |
| */ |
| if (f.next.ty == Tvoid && funcdecl.fensures) |
| { |
| foreach (e; *funcdecl.fensures) |
| { |
| if (e.id) |
| { |
| funcdecl.error(e.ensure.loc, "`void` functions have no result"); |
| //fens = null; |
| } |
| } |
| } |
| |
| sc2 = scout; //push |
| sc2.flags = (sc2.flags & ~SCOPE.contract) | SCOPE.ensure; |
| |
| // BUG: need to disallow returns and throws |
| |
| if (funcdecl.fensure && f.next.ty != Tvoid) |
| funcdecl.buildResultVar(scout, f.next); |
| |
| fens = fens.statementSemantic(sc2); |
| |
| // @@@DEPRECATED_2.111@@@ - pass `isnothrow` instead of `false` to print a more detailed error msg` |
| const blockExit = fens.blockExit(funcdecl, false); |
| if (blockExit & BE.throw_) |
| { |
| if (isnothrow) |
| // @@@DEPRECATED_2.111@@@ |
| // Deprecated in 2.101, can be made an error in 2.111 |
| deprecation(funcdecl.loc, "`%s`: `out` contract may throw but function is marked as `nothrow`", |
| funcdecl.toPrettyChars()); |
| else if (funcdecl.nothrowInprocess) |
| f.isnothrow = false; |
| } |
| |
| funcdecl.hasNoEH = false; |
| |
| sc2 = sc2.pop(); |
| |
| if (global.params.useOut == CHECKENABLE.off) |
| fens = null; |
| } |
| if (funcdecl.fbody && funcdecl.fbody.isErrorStatement()) |
| { |
| } |
| else |
| { |
| auto a = new Statements(); |
| // Merge in initialization of 'out' parameters |
| if (funcdecl.parameters) |
| { |
| for (size_t i = 0; i < funcdecl.parameters.length; i++) |
| { |
| VarDeclaration v = (*funcdecl.parameters)[i]; |
| if (v.storage_class & STC.out_) |
| { |
| if (!v._init) |
| { |
| v.error("zero-length `out` parameters are not allowed."); |
| return; |
| } |
| ExpInitializer ie = v._init.isExpInitializer(); |
| assert(ie); |
| if (auto iec = ie.exp.isConstructExp()) |
| { |
| // construction occurred in parameter processing |
| auto ec = new AssignExp(iec.loc, iec.e1, iec.e2); |
| ec.type = iec.type; |
| ie.exp = ec; |
| } |
| a.push(new ExpStatement(Loc.initial, ie.exp)); |
| } |
| } |
| } |
| |
| if (_arguments) |
| { |
| /* Advance to elements[] member of TypeInfo_Tuple with: |
| * _arguments = v_arguments.elements; |
| */ |
| Expression e = new VarExp(Loc.initial, funcdecl.v_arguments); |
| e = new DotIdExp(Loc.initial, e, Id.elements); |
| e = new ConstructExp(Loc.initial, _arguments, e); |
| e = e.expressionSemantic(sc2); |
| |
| _arguments._init = new ExpInitializer(Loc.initial, e); |
| auto de = new DeclarationExp(Loc.initial, _arguments); |
| a.push(new ExpStatement(Loc.initial, de)); |
| } |
| |
| // Merge contracts together with body into one compound statement |
| |
| if (freq || fpreinv) |
| { |
| if (!freq) |
| freq = fpreinv; |
| else if (fpreinv) |
| freq = new CompoundStatement(Loc.initial, freq, fpreinv); |
| |
| a.push(freq); |
| } |
| |
| if (funcdecl.fbody) |
| a.push(funcdecl.fbody); |
| |
| if (fens || fpostinv) |
| { |
| if (!fens) |
| fens = fpostinv; |
| else if (fpostinv) |
| fens = new CompoundStatement(Loc.initial, fpostinv, fens); |
| |
| auto ls = new LabelStatement(Loc.initial, Id.returnLabel, fens); |
| funcdecl.returnLabel.statement = ls; |
| a.push(funcdecl.returnLabel.statement); |
| |
| if (f.next.ty != Tvoid && funcdecl.vresult) |
| { |
| // Create: return vresult; |
| Expression e = new VarExp(Loc.initial, funcdecl.vresult); |
| if (funcdecl.tintro) |
| { |
| e = e.implicitCastTo(sc, funcdecl.tintro.nextOf()); |
| e = e.expressionSemantic(sc); |
| } |
| auto s = new ReturnStatement(Loc.initial, e); |
| a.push(s); |
| } |
| } |
| if (addReturn0()) |
| { |
| // Add a return 0; statement |
| Statement s = new ReturnStatement(Loc.initial, IntegerExp.literal!0); |
| a.push(s); |
| } |
| |
| Statement sbody = new CompoundStatement(Loc.initial, a); |
| |
| /* Append destructor calls for parameters as finally blocks. |
| */ |
| if (funcdecl.parameters) |
| { |
| // check if callee destroys arguments |
| const bool paramsNeedDtor = target.isCalleeDestroyingArgs(f); |
| |
| foreach (v; *funcdecl.parameters) |
| { |
| if (v.isReference() || (v.storage_class & STC.lazy_)) |
| continue; |
| if (v.needsScopeDtor()) |
| { |
| v.storage_class |= STC.nodtor; |
| if (!paramsNeedDtor) |
| continue; |
| |
| // same with ExpStatement.scopeCode() |
| Statement s = new DtorExpStatement(Loc.initial, v.edtor, v); |
| |
| s = s.statementSemantic(sc2); |
| |
| const blockexit = s.blockExit(funcdecl, isnothrow); |
| if (blockexit & BE.throw_) |
| { |
| funcdecl.hasNoEH = false; |
| if (isnothrow) |
| error(funcdecl.loc, "%s `%s` may throw but is marked as `nothrow`", funcdecl.kind(), funcdecl.toPrettyChars()); |
| else if (funcdecl.nothrowInprocess) |
| f.isnothrow = false; |
| } |
| |
| if (sbody.blockExit(funcdecl, f.isnothrow) == BE.fallthru) |
| sbody = new CompoundStatement(Loc.initial, sbody, s); |
| else |
| sbody = new TryFinallyStatement(Loc.initial, sbody, s); |
| } |
| } |
| } |
| // from this point on all possible 'throwers' are checked |
| funcdecl.nothrowInprocess = false; |
| |
| if (funcdecl.isSynchronized()) |
| { |
| /* Wrap the entire function body in a synchronized statement |
| */ |
| ClassDeclaration cd = funcdecl.toParentDecl().isClassDeclaration(); |
| if (cd) |
| { |
| if (target.libraryObjectMonitors(funcdecl, sbody)) |
| { |
| Expression vsync; |
| if (funcdecl.isStatic()) |
| { |
| // The monitor is in the ClassInfo |
| vsync = new DotIdExp(funcdecl.loc, symbolToExp(cd, funcdecl.loc, sc2, false), Id.classinfo); |
| } |
| else |
| { |
| // 'this' is the monitor |
| vsync = new VarExp(funcdecl.loc, funcdecl.vthis); |
| if (funcdecl.hasDualContext()) |
| { |
| vsync = new PtrExp(funcdecl.loc, vsync); |
| vsync = new IndexExp(funcdecl.loc, vsync, IntegerExp.literal!0); |
| } |
| } |
| sbody = new PeelStatement(sbody); // don't redo semantic() |
| sbody = new SynchronizedStatement(funcdecl.loc, vsync, sbody); |
| sbody = sbody.statementSemantic(sc2); |
| } |
| } |
| else |
| { |
| funcdecl.error("synchronized function `%s` must be a member of a class", funcdecl.toChars()); |
| } |
| } |
| |
| // If declaration has no body, don't set sbody to prevent incorrect codegen. |
| if (funcdecl.fbody || funcdecl.allowsContractWithoutBody()) |
| funcdecl.fbody = sbody; |
| } |
| |
| // Check for undefined labels |
| if (funcdecl.labtab) |
| foreach (keyValue; funcdecl.labtab.tab.asRange) |
| { |
| //printf(" KV: %s = %s\n", keyValue.key.toChars(), keyValue.value.toChars()); |
| LabelDsymbol label = cast(LabelDsymbol)keyValue.value; |
| if (!label.statement && (!label.deleted || label.iasm)) |
| { |
| funcdecl.error(label.loc, "label `%s` is undefined", label.toChars()); |
| } |
| } |
| |
| // Fix up forward-referenced gotos |
| if (funcdecl.gotos && !funcdecl.isCsymbol()) |
| { |
| for (size_t i = 0; i < funcdecl.gotos.length; ++i) |
| { |
| (*funcdecl.gotos)[i].checkLabel(); |
| } |
| } |
| |
| if (funcdecl.isNaked() && (funcdecl.fensures || funcdecl.frequires)) |
| funcdecl.error("naked assembly functions with contracts are not supported"); |
| |
| sc2.ctorflow.callSuper = CSX.none; |
| sc2.pop(); |
| } |
| |
| if (funcdecl.checkClosure()) |
| { |
| // We should be setting errors here instead of relying on the global error count. |
| //errors = true; |
| } |
| |
| /* If function survived being marked as impure, then it is pure |
| */ |
| if (funcdecl.purityInprocess) |
| { |
| funcdecl.purityInprocess = false; |
| if (funcdecl.type == f) |
| f = cast(TypeFunction)f.copy(); |
| f.purity = PURE.fwdref; |
| } |
| |
| if (funcdecl.safetyInprocess) |
| { |
| funcdecl.safetyInprocess = false; |
| if (funcdecl.type == f) |
| f = cast(TypeFunction)f.copy(); |
| f.trust = TRUST.safe; |
| } |
| |
| if (funcdecl.nogcInprocess) |
| { |
| funcdecl.nogcInprocess = false; |
| if (funcdecl.type == f) |
| f = cast(TypeFunction)f.copy(); |
| f.isnogc = true; |
| } |
| |
| finishScopeParamInference(funcdecl, f); |
| |
| // reset deco to apply inference result to mangled name |
| if (f != funcdecl.type) |
| f.deco = null; |
| |
| // Do semantic type AFTER pure/nothrow inference. |
| if (!f.deco && funcdecl.ident != Id.xopEquals && funcdecl.ident != Id.xopCmp) |
| { |
| sc = sc.push(); |
| if (funcdecl.isCtorDeclaration()) // https://issues.dlang.org/show_bug.cgi?id=#15665 |
| f.isctor = true; |
| sc.stc = 0; |
| sc.linkage = funcdecl._linkage; // https://issues.dlang.org/show_bug.cgi?id=8496 |
| funcdecl.type = f.typeSemantic(funcdecl.loc, sc); |
| sc = sc.pop(); |
| } |
| |
| // Check `extern(C++)` functions for invalid the return/parameter types |
| if (funcdecl._linkage == LINK.cpp) |
| { |
| static bool isCppNonMappableType(Type type, Parameter param = null, Type origType = null) |
| { |
| // Don't allow D `immutable` and `shared` types to be interfaced with C++ |
| if (type.isImmutable() || type.isShared()) |
| return true; |
| else if (Type cpptype = target.cpp.parameterType(type)) |
| type = cpptype; |
| |
| if (origType is null) |
| origType = type; |
| |
| // Permit types that are handled by toCppMangle. This list should be kept in sync with |
| // each visit method in dmd.cppmangle and dmd.cppmanglewin. |
| switch (type.ty) |
| { |
| case Tnull: |
| case Tnoreturn: |
| case Tvector: |
| case Tpointer: |
| case Treference: |
| case Tfunction: |
| case Tstruct: |
| case Tenum: |
| case Tclass: |
| case Tident: |
| case Tinstance: |
| break; |
| |
| case Tsarray: |
| if (!origType.isTypePointer()) |
| return true; |
| break; |
| |
| default: |
| if (!type.isTypeBasic()) |
| return true; |
| break; |
| } |
| |
| // Descend to the enclosing type |
| if (auto tnext = type.nextOf()) |
| return isCppNonMappableType(tnext, param, origType); |
| |
| return false; |
| } |
| if (isCppNonMappableType(f.next.toBasetype())) |
| { |
| funcdecl.error("cannot return type `%s` because its linkage is `extern(C++)`", f.next.toChars()); |
| funcdecl.errors = true; |
| } |
| foreach (i, param; f.parameterList) |
| { |
| if (isCppNonMappableType(param.type.toBasetype(), param)) |
| { |
| funcdecl.error("cannot have parameter of type `%s` because its linkage is `extern(C++)`", param.type.toChars()); |
| if (param.type.toBasetype().isTypeSArray()) |
| errorSupplemental(funcdecl.loc, "perhaps use a `%s*` type instead", |
| param.type.nextOf().mutableOf().unSharedOf().toChars()); |
| funcdecl.errors = true; |
| } |
| } |
| } |
| |
| // Do live analysis |
| if (global.params.useDIP1021 && funcdecl.fbody && funcdecl.type.ty != Terror && |
| funcdecl.type.isTypeFunction().islive) |
| { |
| oblive(funcdecl); |
| } |
| |
| /* If this function had instantiated with gagging, error reproduction will be |
| * done by TemplateInstance::semantic. |
| * Otherwise, error gagging should be temporarily ungagged by functionSemantic3. |
| */ |
| funcdecl.semanticRun = PASS.semantic3done; |
| if ((global.errors != oldErrors) || (funcdecl.fbody && funcdecl.fbody.isErrorStatement())) |
| funcdecl.hasSemantic3Errors = true; |
| else |
| funcdecl.hasSemantic3Errors = false; |
| if (funcdecl.type.ty == Terror) |
| funcdecl.errors = true; |
| //printf("-FuncDeclaration::semantic3('%s.%s', sc = %p, loc = %s)\n", funcdecl.parent.toChars(), funcdecl.toChars(), sc, funcdecl.loc.toChars()); |
| //fflush(stdout); |
| } |
| |
| override void visit(CtorDeclaration ctor) |
| { |
| //printf("CtorDeclaration()\n%s\n", ctor.fbody.toChars()); |
| if (ctor.semanticRun >= PASS.semantic3) |
| return; |
| |
| /* If any of the fields of the aggregate have a destructor, add |
| * scope (failure) { this.fieldDtor(); } |
| * as the first statement of the constructor (unless the constructor |
| * doesn't define a body - @disable, extern) |
| *.It is not necessary to add it after |
| * each initialization of a field, because destruction of .init constructed |
| * structs should be benign. |
| * https://issues.dlang.org/show_bug.cgi?id=14246 |
| */ |
| AggregateDeclaration ad = ctor.isMemberDecl(); |
| if (!ctor.fbody || !ad || !ad.fieldDtor || !global.params.dtorFields || global.params.betterC || ctor.type.toTypeFunction.isnothrow) |
| return visit(cast(FuncDeclaration)ctor); |
| |
| /* Generate: |
| * this.fieldDtor() |
| */ |
| Expression e = new ThisExp(ctor.loc); |
| e.type = ad.type.mutableOf(); |
| e = new DotVarExp(ctor.loc, e, ad.fieldDtor, false); |
| auto ce = new CallExp(ctor.loc, e); |
| auto sexp = new ExpStatement(ctor.loc, ce); |
| auto ss = new ScopeStatement(ctor.loc, sexp, ctor.loc); |
| |
| // @@@DEPRECATED_2.106@@@ |
| // Allow negligible attribute violations to allow for a smooth |
| // transition. Remove this after the usual deprecation period |
| // after 2.106. |
| if (global.params.dtorFields == FeatureState.default_) |
| { |
| auto ctf = cast(TypeFunction) ctor.type; |
| auto dtf = cast(TypeFunction) ad.fieldDtor.type; |
| |
| const ngErr = ctf.isnogc && !dtf.isnogc; |
| const puErr = ctf.purity && !dtf.purity; |
| const saErr = ctf.trust == TRUST.safe && dtf.trust <= TRUST.system; |
| |
| if (ngErr || puErr || saErr) |
| { |
| // storage_class is apparently not set for dtor & ctor |
| OutBuffer ob; |
| stcToBuffer(&ob, |
| (ngErr ? STC.nogc : 0) | |
| (puErr ? STC.pure_ : 0) | |
| (saErr ? STC.system : 0) |
| ); |
| ctor.loc.deprecation("`%s` has stricter attributes than its destructor (`%s`)", ctor.toPrettyChars(), ob.peekChars()); |
| ctor.loc.deprecationSupplemental("The destructor will be called if an exception is thrown"); |
| ctor.loc.deprecationSupplemental("Either make the constructor `nothrow` or adjust the field destructors"); |
| |
| ce.ignoreAttributes = true; |
| } |
| } |
| |
| version (all) |
| { |
| /* Generate: |
| * try { ctor.fbody; } |
| * catch (Exception __o) |
| * { this.fieldDtor(); throw __o; } |
| * This differs from the alternate scope(failure) version in that an Exception |
| * is caught rather than a Throwable. This enables the optimization whereby |
| * the try-catch can be removed if ctor.fbody is nothrow. (nothrow only |
| * applies to Exception.) |
| */ |
| Identifier id = Identifier.generateId("__o"); |
| auto ts = new ThrowStatement(ctor.loc, new IdentifierExp(ctor.loc, id)); |
| auto handler = new CompoundStatement(ctor.loc, ss, ts); |
| |
| auto catches = new Catches(); |
| auto ctch = new Catch(ctor.loc, getException(), id, handler); |
| catches.push(ctch); |
| |
| ctor.fbody = new TryCatchStatement(ctor.loc, ctor.fbody, catches); |
| } |
| else |
| { |
| /* Generate: |
| * scope (failure) { this.fieldDtor(); } |
| * Hopefully we can use this version someday when scope(failure) catches |
| * Exception instead of Throwable. |
| */ |
| auto s = new ScopeGuardStatement(ctor.loc, TOK.onScopeFailure, ss); |
| ctor.fbody = new CompoundStatement(ctor.loc, s, ctor.fbody); |
| } |
| visit(cast(FuncDeclaration)ctor); |
| } |
| |
| |
| override void visit(Nspace ns) |
| { |
| if (ns.semanticRun >= PASS.semantic3) |
| return; |
| ns.semanticRun = PASS.semantic3; |
| static if (LOG) |
| { |
| printf("Nspace::semantic3('%s')\n", ns.toChars()); |
| } |
| if (!ns.members) |
| return; |
| |
| sc = sc.push(ns); |
| sc.linkage = LINK.cpp; |
| foreach (s; *ns.members) |
| { |
| s.semantic3(sc); |
| } |
| sc.pop(); |
| } |
| |
| override void visit(AttribDeclaration ad) |
| { |
| Dsymbols* d = ad.include(sc); |
| if (!d) |
| return; |
| |
| Scope* sc2 = ad.newScope(sc); |
| for (size_t i = 0; i < d.length; i++) |
| { |
| Dsymbol s = (*d)[i]; |
| s.semantic3(sc2); |
| } |
| if (sc2 != sc) |
| sc2.pop(); |
| } |
| |
| override void visit(AggregateDeclaration ad) |
| { |
| //printf("AggregateDeclaration::semantic3(sc=%p, %s) type = %s, errors = %d\n", sc, toChars(), type.toChars(), errors); |
| if (!ad.members) |
| return; |
| |
| StructDeclaration sd = ad.isStructDeclaration(); |
| if (!sc) // from runDeferredSemantic3 for TypeInfo generation |
| { |
| assert(sd); |
| sd.semanticTypeInfoMembers(); |
| return; |
| } |
| |
| auto sc2 = ad.newScope(sc); |
| |
| for (size_t i = 0; i < ad.members.length; i++) |
| { |
| Dsymbol s = (*ad.members)[i]; |
| s.semantic3(sc2); |
| } |
| |
| sc2.pop(); |
| |
| // Instantiate RTInfo!S to provide a pointer bitmap for the GC |
| // Don't do it in -betterC or on unused deprecated / error types |
| if (!ad.getRTInfo && global.params.useTypeInfo && Type.rtinfo && |
| (!ad.isDeprecated() || global.params.useDeprecated != DiagnosticReporting.error) && |
| (ad.type && ad.type.ty != Terror)) |
| { |
| // Evaluate: RTinfo!type |
| auto tiargs = new Objects(); |
| tiargs.push(ad.type); |
| auto ti = new TemplateInstance(ad.loc, Type.rtinfo, tiargs); |
| |
| Scope* sc3 = ti.tempdecl._scope.startCTFE(); |
| sc3.tinst = sc.tinst; |
| sc3.minst = sc.minst; |
| if (ad.isDeprecated()) |
| sc3.stc |= STC.deprecated_; |
| |
| ti.dsymbolSemantic(sc3); |
| ti.semantic2(sc3); |
| ti.semantic3(sc3); |
| auto e = symbolToExp(ti.toAlias(), Loc.initial, sc3, false); |
| |
| sc3.endCTFE(); |
| |
| e = e.ctfeInterpret(); |
| ad.getRTInfo = e; |
| } |
| if (sd) |
| sd.semanticTypeInfoMembers(); |
| ad.semanticRun = PASS.semantic3done; |
| } |
| } |
| |
| private struct FuncDeclSem3 |
| { |
| // The FuncDeclaration subject to Semantic analysis |
| FuncDeclaration funcdecl; |
| |
| // Scope of analysis |
| Scope* sc; |
| this(FuncDeclaration fd,Scope* s) scope |
| { |
| funcdecl = fd; |
| sc = s; |
| } |
| |
| /* Checks that the overriden functions (if any) have in contracts if |
| * funcdecl has an in contract. |
| */ |
| void checkInContractOverrides() |
| { |
| if (funcdecl.frequires) |
| { |
| for (size_t i = 0; i < funcdecl.foverrides.length; i++) |
| { |
| FuncDeclaration fdv = funcdecl.foverrides[i]; |
| if (fdv.fbody && !fdv.frequires) |
| { |
| funcdecl.error("cannot have an in contract when overridden function `%s` does not have an in contract", fdv.toPrettyChars()); |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| extern (C++) void semanticTypeInfoMembers(StructDeclaration sd) |
| { |
| if (sd.xeq && |
| sd.xeq._scope && |
| sd.xeq.semanticRun < PASS.semantic3done) |
| { |
| uint errors = global.startGagging(); |
| sd.xeq.semantic3(sd.xeq._scope); |
| if (global.endGagging(errors)) |
| sd.xeq = sd.xerreq; |
| } |
| |
| if (sd.xcmp && |
| sd.xcmp._scope && |
| sd.xcmp.semanticRun < PASS.semantic3done) |
| { |
| uint errors = global.startGagging(); |
| sd.xcmp.semantic3(sd.xcmp._scope); |
| if (global.endGagging(errors)) |
| sd.xcmp = sd.xerrcmp; |
| } |
| |
| FuncDeclaration ftostr = search_toString(sd); |
| if (ftostr && |
| ftostr._scope && |
| ftostr.semanticRun < PASS.semantic3done) |
| { |
| ftostr.semantic3(ftostr._scope); |
| } |
| |
| if (sd.xhash && |
| sd.xhash._scope && |
| sd.xhash.semanticRun < PASS.semantic3done) |
| { |
| sd.xhash.semantic3(sd.xhash._scope); |
| } |
| |
| if (sd.postblit && |
| sd.postblit._scope && |
| sd.postblit.semanticRun < PASS.semantic3done) |
| { |
| sd.postblit.semantic3(sd.postblit._scope); |
| } |
| |
| if (sd.dtor && |
| sd.dtor._scope && |
| sd.dtor.semanticRun < PASS.semantic3done) |
| { |
| sd.dtor.semantic3(sd.dtor._scope); |
| } |
| } |
