| |
| /* Compiler implementation of the D programming language |
| * Copyright (C) 1999-2019 by The D Language Foundation, All Rights Reserved |
| * written by Walter Bright |
| * http://www.digitalmars.com |
| * Distributed under the Boost Software License, Version 1.0. |
| * http://www.boost.org/LICENSE_1_0.txt |
| * https://github.com/D-Programming-Language/dmd/blob/master/src/class.c |
| */ |
| |
| #include "root/dsystem.h" // mem{cpy|set}() |
| #include "root/root.h" |
| #include "root/rmem.h" |
| |
| #include "errors.h" |
| #include "enum.h" |
| #include "init.h" |
| #include "attrib.h" |
| #include "declaration.h" |
| #include "aggregate.h" |
| #include "id.h" |
| #include "mtype.h" |
| #include "scope.h" |
| #include "module.h" |
| #include "expression.h" |
| #include "statement.h" |
| #include "template.h" |
| #include "target.h" |
| #include "objc.h" |
| |
| bool symbolIsVisible(Dsymbol *origin, Dsymbol *s); |
| Objc *objc(); |
| |
| |
| /********************************* ClassDeclaration ****************************/ |
| |
| ClassDeclaration *ClassDeclaration::object; |
| ClassDeclaration *ClassDeclaration::throwable; |
| ClassDeclaration *ClassDeclaration::exception; |
| ClassDeclaration *ClassDeclaration::errorException; |
| ClassDeclaration *ClassDeclaration::cpp_type_info_ptr; // Object.__cpp_type_info_ptr |
| |
| ClassDeclaration::ClassDeclaration(Loc loc, Identifier *id, BaseClasses *baseclasses, Dsymbols *members, bool inObject) |
| : AggregateDeclaration(loc, id ? id : Identifier::generateId("__anonclass")) |
| { |
| static const char msg[] = "only object.d can define this reserved class name"; |
| |
| if (baseclasses) |
| { |
| // Actually, this is a transfer |
| this->baseclasses = baseclasses; |
| } |
| else |
| this->baseclasses = new BaseClasses(); |
| |
| this->members = members; |
| |
| baseClass = NULL; |
| |
| interfaces.length = 0; |
| interfaces.ptr = NULL; |
| |
| vtblInterfaces = NULL; |
| |
| //printf("ClassDeclaration(%s), dim = %d\n", id->toChars(), this->baseclasses->dim); |
| |
| // For forward references |
| type = new TypeClass(this); |
| |
| staticCtor = NULL; |
| staticDtor = NULL; |
| |
| vtblsym = NULL; |
| vclassinfo = NULL; |
| |
| if (id) |
| { |
| // Look for special class names |
| |
| if (id == Id::__sizeof || id == Id::__xalignof || id == Id::_mangleof) |
| error("illegal class name"); |
| |
| // BUG: What if this is the wrong TypeInfo, i.e. it is nested? |
| if (id->toChars()[0] == 'T') |
| { |
| if (id == Id::TypeInfo) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::dtypeinfo = this; |
| } |
| |
| if (id == Id::TypeInfo_Class) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfoclass = this; |
| } |
| |
| if (id == Id::TypeInfo_Interface) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfointerface = this; |
| } |
| |
| if (id == Id::TypeInfo_Struct) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfostruct = this; |
| } |
| |
| if (id == Id::TypeInfo_Pointer) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfopointer = this; |
| } |
| |
| if (id == Id::TypeInfo_Array) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfoarray = this; |
| } |
| |
| if (id == Id::TypeInfo_StaticArray) |
| { |
| //if (!inObject) |
| // Type::typeinfostaticarray->error("%s", msg); |
| Type::typeinfostaticarray = this; |
| } |
| |
| if (id == Id::TypeInfo_AssociativeArray) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfoassociativearray = this; |
| } |
| |
| if (id == Id::TypeInfo_Enum) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfoenum = this; |
| } |
| |
| if (id == Id::TypeInfo_Function) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfofunction = this; |
| } |
| |
| if (id == Id::TypeInfo_Delegate) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfodelegate = this; |
| } |
| |
| if (id == Id::TypeInfo_Tuple) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfotypelist = this; |
| } |
| |
| if (id == Id::TypeInfo_Const) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfoconst = this; |
| } |
| |
| if (id == Id::TypeInfo_Invariant) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfoinvariant = this; |
| } |
| |
| if (id == Id::TypeInfo_Shared) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfoshared = this; |
| } |
| |
| if (id == Id::TypeInfo_Wild) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfowild = this; |
| } |
| |
| if (id == Id::TypeInfo_Vector) |
| { |
| if (!inObject) |
| error("%s", msg); |
| Type::typeinfovector = this; |
| } |
| } |
| |
| if (id == Id::Object) |
| { |
| if (!inObject) |
| error("%s", msg); |
| object = this; |
| } |
| |
| if (id == Id::Throwable) |
| { |
| if (!inObject) |
| error("%s", msg); |
| throwable = this; |
| } |
| |
| if (id == Id::Exception) |
| { |
| if (!inObject) |
| error("%s", msg); |
| exception = this; |
| } |
| |
| if (id == Id::Error) |
| { |
| if (!inObject) |
| error("%s", msg); |
| errorException = this; |
| } |
| |
| if (id == Id::cpp_type_info_ptr) |
| { |
| if (!inObject) |
| error("%s", msg); |
| cpp_type_info_ptr = this; |
| } |
| } |
| |
| com = false; |
| cpp = false; |
| isscope = false; |
| isabstract = ABSfwdref; |
| inuse = 0; |
| baseok = BASEOKnone; |
| isobjc = false; |
| cpp_type_info_ptr_sym = NULL; |
| } |
| |
| ClassDeclaration *ClassDeclaration::create(Loc loc, Identifier *id, BaseClasses *baseclasses, Dsymbols *members, bool inObject) |
| { |
| return new ClassDeclaration(loc, id, baseclasses, members, inObject); |
| } |
| |
| Dsymbol *ClassDeclaration::syntaxCopy(Dsymbol *s) |
| { |
| //printf("ClassDeclaration::syntaxCopy('%s')\n", toChars()); |
| ClassDeclaration *cd = |
| s ? (ClassDeclaration *)s |
| : new ClassDeclaration(loc, ident, NULL, NULL, false); |
| |
| cd->storage_class |= storage_class; |
| |
| cd->baseclasses->setDim(this->baseclasses->dim); |
| for (size_t i = 0; i < cd->baseclasses->dim; i++) |
| { |
| BaseClass *b = (*this->baseclasses)[i]; |
| BaseClass *b2 = new BaseClass(b->type->syntaxCopy()); |
| (*cd->baseclasses)[i] = b2; |
| } |
| |
| return ScopeDsymbol::syntaxCopy(cd); |
| } |
| |
| Scope *ClassDeclaration::newScope(Scope *sc) |
| { |
| Scope *sc2 = AggregateDeclaration::newScope(sc); |
| if (isCOMclass()) |
| { |
| if (global.params.isWindows) |
| sc2->linkage = LINKwindows; |
| else |
| { |
| /* This enables us to use COM objects under Linux and |
| * work with things like XPCOM |
| */ |
| sc2->linkage = LINKc; |
| } |
| } |
| return sc2; |
| } |
| |
| /* Bugzilla 12078, 12143 and 15733: |
| * While resolving base classes and interfaces, a base may refer |
| * the member of this derived class. In that time, if all bases of |
| * this class can be determined, we can go forward the semantc process |
| * beyond the Lancestorsdone. To do the recursive semantic analysis, |
| * temporarily set and unset `_scope` around exp(). |
| */ |
| static Type *resolveBase(ClassDeclaration *cd, Scope *sc, Scope *&scx, Type *type) |
| { |
| if (!scx) |
| { |
| scx = sc->copy(); |
| scx->setNoFree(); |
| } |
| cd->_scope = scx; |
| Type *t = type->semantic(cd->loc, sc); |
| cd->_scope = NULL; |
| return t; |
| } |
| |
| static void resolveBase(ClassDeclaration *cd, Scope *sc, Scope *&scx, ClassDeclaration *sym) |
| { |
| if (!scx) |
| { |
| scx = sc->copy(); |
| scx->setNoFree(); |
| } |
| cd->_scope = scx; |
| sym->semantic(NULL); |
| cd->_scope = NULL; |
| } |
| |
| static void badObjectDotD(ClassDeclaration *cd) |
| { |
| cd->error("missing or corrupt object.d"); |
| fatal(); |
| } |
| |
| void ClassDeclaration::semantic(Scope *sc) |
| { |
| //printf("ClassDeclaration::semantic(%s), type = %p, sizeok = %d, this = %p\n", toChars(), type, sizeok, this); |
| //printf("\tparent = %p, '%s'\n", sc->parent, sc->parent ? sc->parent->toChars() : ""); |
| //printf("sc->stc = %x\n", sc->stc); |
| |
| //{ static int n; if (++n == 20) *(char*)0=0; } |
| |
| if (semanticRun >= PASSsemanticdone) |
| return; |
| unsigned errors = global.errors; |
| |
| //printf("+ClassDeclaration::semantic(%s), type = %p, sizeok = %d, this = %p\n", toChars(), type, sizeok, this); |
| |
| Scope *scx = NULL; |
| if (_scope) |
| { |
| sc = _scope; |
| scx = _scope; // save so we don't make redundant copies |
| _scope = NULL; |
| } |
| |
| if (!parent) |
| { |
| assert(sc->parent); |
| parent = sc->parent; |
| } |
| |
| if (this->errors) |
| type = Type::terror; |
| type = type->semantic(loc, sc); |
| |
| if (type->ty == Tclass && ((TypeClass *)type)->sym != this) |
| { |
| TemplateInstance *ti = ((TypeClass *)type)->sym->isInstantiated(); |
| if (ti && isError(ti)) |
| ((TypeClass *)type)->sym = this; |
| } |
| |
| // Ungag errors when not speculative |
| Ungag ungag = ungagSpeculative(); |
| |
| if (semanticRun == PASSinit) |
| { |
| protection = sc->protection; |
| |
| storage_class |= sc->stc; |
| if (storage_class & STCdeprecated) |
| isdeprecated = true; |
| if (storage_class & STCauto) |
| error("storage class 'auto' is invalid when declaring a class, did you mean to use 'scope'?"); |
| if (storage_class & STCscope) |
| isscope = true; |
| if (storage_class & STCabstract) |
| isabstract = ABSyes; |
| |
| userAttribDecl = sc->userAttribDecl; |
| |
| if (sc->linkage == LINKcpp) |
| cpp = true; |
| if (sc->linkage == LINKobjc) |
| objc()->setObjc(this); |
| } |
| else if (symtab && !scx) |
| { |
| return; |
| } |
| semanticRun = PASSsemantic; |
| |
| if (baseok < BASEOKdone) |
| { |
| baseok = BASEOKin; |
| |
| // Expand any tuples in baseclasses[] |
| for (size_t i = 0; i < baseclasses->dim; ) |
| { |
| BaseClass *b = (*baseclasses)[i]; |
| b->type = resolveBase(this, sc, scx, b->type); |
| |
| Type *tb = b->type->toBasetype(); |
| if (tb->ty == Ttuple) |
| { |
| TypeTuple *tup = (TypeTuple *)tb; |
| baseclasses->remove(i); |
| size_t dim = Parameter::dim(tup->arguments); |
| for (size_t j = 0; j < dim; j++) |
| { |
| Parameter *arg = Parameter::getNth(tup->arguments, j); |
| b = new BaseClass(arg->type); |
| baseclasses->insert(i + j, b); |
| } |
| } |
| else |
| i++; |
| } |
| |
| if (baseok >= BASEOKdone) |
| { |
| //printf("%s already semantic analyzed, semanticRun = %d\n", toChars(), semanticRun); |
| if (semanticRun >= PASSsemanticdone) |
| return; |
| goto Lancestorsdone; |
| } |
| |
| // See if there's a base class as first in baseclasses[] |
| if (baseclasses->dim) |
| { |
| BaseClass *b = (*baseclasses)[0]; |
| Type *tb = b->type->toBasetype(); |
| TypeClass *tc = (tb->ty == Tclass) ? (TypeClass *)tb : NULL; |
| if (!tc) |
| { |
| if (b->type != Type::terror) |
| error("base type must be class or interface, not %s", b->type->toChars()); |
| baseclasses->remove(0); |
| goto L7; |
| } |
| |
| if (tc->sym->isDeprecated()) |
| { |
| if (!isDeprecated()) |
| { |
| // Deriving from deprecated class makes this one deprecated too |
| isdeprecated = true; |
| |
| tc->checkDeprecated(loc, sc); |
| } |
| } |
| |
| if (tc->sym->isInterfaceDeclaration()) |
| goto L7; |
| |
| for (ClassDeclaration *cdb = tc->sym; cdb; cdb = cdb->baseClass) |
| { |
| if (cdb == this) |
| { |
| error("circular inheritance"); |
| baseclasses->remove(0); |
| goto L7; |
| } |
| } |
| |
| /* Bugzilla 11034: Essentially, class inheritance hierarchy |
| * and instance size of each classes are orthogonal information. |
| * Therefore, even if tc->sym->sizeof == SIZEOKnone, |
| * we need to set baseClass field for class covariance check. |
| */ |
| baseClass = tc->sym; |
| b->sym = baseClass; |
| |
| if (tc->sym->_scope && tc->sym->baseok < BASEOKdone) |
| resolveBase(this, sc, scx, tc->sym); // Try to resolve forward reference |
| if (tc->sym->baseok < BASEOKdone) |
| { |
| //printf("\ttry later, forward reference of base class %s\n", tc->sym->toChars()); |
| if (tc->sym->_scope) |
| tc->sym->_scope->_module->addDeferredSemantic(tc->sym); |
| baseok = BASEOKnone; |
| } |
| L7: ; |
| } |
| |
| // Treat the remaining entries in baseclasses as interfaces |
| // Check for errors, handle forward references |
| for (size_t i = (baseClass ? 1 : 0); i < baseclasses->dim; ) |
| { |
| BaseClass *b = (*baseclasses)[i]; |
| Type *tb = b->type->toBasetype(); |
| TypeClass *tc = (tb->ty == Tclass) ? (TypeClass *)tb : NULL; |
| if (!tc || !tc->sym->isInterfaceDeclaration()) |
| { |
| if (b->type != Type::terror) |
| error("base type must be interface, not %s", b->type->toChars()); |
| baseclasses->remove(i); |
| continue; |
| } |
| |
| // Check for duplicate interfaces |
| for (size_t j = (baseClass ? 1 : 0); j < i; j++) |
| { |
| BaseClass *b2 = (*baseclasses)[j]; |
| if (b2->sym == tc->sym) |
| { |
| error("inherits from duplicate interface %s", b2->sym->toChars()); |
| baseclasses->remove(i); |
| continue; |
| } |
| } |
| |
| if (tc->sym->isDeprecated()) |
| { |
| if (!isDeprecated()) |
| { |
| // Deriving from deprecated class makes this one deprecated too |
| isdeprecated = true; |
| |
| tc->checkDeprecated(loc, sc); |
| } |
| } |
| |
| b->sym = tc->sym; |
| |
| if (tc->sym->_scope && tc->sym->baseok < BASEOKdone) |
| resolveBase(this, sc, scx, tc->sym); // Try to resolve forward reference |
| if (tc->sym->baseok < BASEOKdone) |
| { |
| //printf("\ttry later, forward reference of base %s\n", tc->sym->toChars()); |
| if (tc->sym->_scope) |
| tc->sym->_scope->_module->addDeferredSemantic(tc->sym); |
| baseok = BASEOKnone; |
| } |
| i++; |
| } |
| if (baseok == BASEOKnone) |
| { |
| // Forward referencee of one or more bases, try again later |
| _scope = scx ? scx : sc->copy(); |
| _scope->setNoFree(); |
| _scope->_module->addDeferredSemantic(this); |
| //printf("\tL%d semantic('%s') failed due to forward references\n", __LINE__, toChars()); |
| return; |
| } |
| baseok = BASEOKdone; |
| |
| // If no base class, and this is not an Object, use Object as base class |
| if (!baseClass && ident != Id::Object && !cpp) |
| { |
| if (!object || object->errors) |
| badObjectDotD(this); |
| |
| Type *t = object->type; |
| t = t->semantic(loc, sc)->toBasetype(); |
| if (t->ty == Terror) |
| badObjectDotD(this); |
| assert(t->ty == Tclass); |
| TypeClass *tc = (TypeClass *)t; |
| |
| BaseClass *b = new BaseClass(tc); |
| baseclasses->shift(b); |
| |
| baseClass = tc->sym; |
| assert(!baseClass->isInterfaceDeclaration()); |
| b->sym = baseClass; |
| } |
| if (baseClass) |
| { |
| if (baseClass->storage_class & STCfinal) |
| error("cannot inherit from final class %s", baseClass->toChars()); |
| |
| // Inherit properties from base class |
| if (baseClass->isCOMclass()) |
| com = true; |
| if (baseClass->isCPPclass()) |
| cpp = true; |
| if (baseClass->isscope) |
| isscope = true; |
| enclosing = baseClass->enclosing; |
| storage_class |= baseClass->storage_class & STC_TYPECTOR; |
| } |
| |
| interfaces.length = baseclasses->dim - (baseClass ? 1 : 0); |
| interfaces.ptr = baseclasses->tdata() + (baseClass ? 1 : 0); |
| |
| for (size_t i = 0; i < interfaces.length; i++) |
| { |
| BaseClass *b = interfaces.ptr[i]; |
| // If this is an interface, and it derives from a COM interface, |
| // then this is a COM interface too. |
| if (b->sym->isCOMinterface()) |
| com = true; |
| if (cpp && !b->sym->isCPPinterface()) |
| { |
| ::error(loc, "C++ class '%s' cannot implement D interface '%s'", |
| toPrettyChars(), b->sym->toPrettyChars()); |
| } |
| } |
| |
| interfaceSemantic(sc); |
| } |
| Lancestorsdone: |
| //printf("\tClassDeclaration::semantic(%s) baseok = %d\n", toChars(), baseok); |
| |
| if (!members) // if opaque declaration |
| { |
| semanticRun = PASSsemanticdone; |
| return; |
| } |
| if (!symtab) |
| { |
| symtab = new DsymbolTable(); |
| |
| /* Bugzilla 12152: The semantic analysis of base classes should be finished |
| * before the members semantic analysis of this class, in order to determine |
| * vtbl in this class. However if a base class refers the member of this class, |
| * it can be resolved as a normal forward reference. |
| * Call addMember() and setScope() to make this class members visible from the base classes. |
| */ |
| for (size_t i = 0; i < members->dim; i++) |
| { |
| Dsymbol *s = (*members)[i]; |
| s->addMember(sc, this); |
| } |
| |
| Scope *sc2 = newScope(sc); |
| |
| /* Set scope so if there are forward references, we still might be able to |
| * resolve individual members like enums. |
| */ |
| for (size_t i = 0; i < members->dim; i++) |
| { |
| Dsymbol *s = (*members)[i]; |
| //printf("[%d] setScope %s %s, sc2 = %p\n", i, s->kind(), s->toChars(), sc2); |
| s->setScope(sc2); |
| } |
| |
| sc2->pop(); |
| } |
| |
| for (size_t i = 0; i < baseclasses->dim; i++) |
| { |
| BaseClass *b = (*baseclasses)[i]; |
| Type *tb = b->type->toBasetype(); |
| assert(tb->ty == Tclass); |
| TypeClass *tc = (TypeClass *)tb; |
| |
| if (tc->sym->semanticRun < PASSsemanticdone) |
| { |
| // Forward referencee of one or more bases, try again later |
| _scope = scx ? scx : sc->copy(); |
| _scope->setNoFree(); |
| if (tc->sym->_scope) |
| tc->sym->_scope->_module->addDeferredSemantic(tc->sym); |
| _scope->_module->addDeferredSemantic(this); |
| //printf("\tL%d semantic('%s') failed due to forward references\n", __LINE__, toChars()); |
| return; |
| } |
| } |
| |
| if (baseok == BASEOKdone) |
| { |
| baseok = BASEOKsemanticdone; |
| |
| // initialize vtbl |
| if (baseClass) |
| { |
| if (cpp && baseClass->vtbl.dim == 0) |
| { |
| error("C++ base class %s needs at least one virtual function", baseClass->toChars()); |
| } |
| |
| // Copy vtbl[] from base class |
| vtbl.setDim(baseClass->vtbl.dim); |
| memcpy(vtbl.tdata(), baseClass->vtbl.tdata(), sizeof(void *) * vtbl.dim); |
| |
| vthis = baseClass->vthis; |
| } |
| else |
| { |
| // No base class, so this is the root of the class hierarchy |
| vtbl.setDim(0); |
| if (vtblOffset()) |
| vtbl.push(this); // leave room for classinfo as first member |
| } |
| |
| /* If this is a nested class, add the hidden 'this' |
| * member which is a pointer to the enclosing scope. |
| */ |
| if (vthis) // if inheriting from nested class |
| { |
| // Use the base class's 'this' member |
| if (storage_class & STCstatic) |
| error("static class cannot inherit from nested class %s", baseClass->toChars()); |
| if (toParent2() != baseClass->toParent2() && |
| (!toParent2() || |
| !baseClass->toParent2()->getType() || |
| !baseClass->toParent2()->getType()->isBaseOf(toParent2()->getType(), NULL))) |
| { |
| if (toParent2()) |
| { |
| error("is nested within %s, but super class %s is nested within %s", |
| toParent2()->toChars(), |
| baseClass->toChars(), |
| baseClass->toParent2()->toChars()); |
| } |
| else |
| { |
| error("is not nested, but super class %s is nested within %s", |
| baseClass->toChars(), |
| baseClass->toParent2()->toChars()); |
| } |
| enclosing = NULL; |
| } |
| } |
| else |
| makeNested(); |
| } |
| |
| Scope *sc2 = newScope(sc); |
| |
| for (size_t i = 0; i < members->dim; i++) |
| { |
| Dsymbol *s = (*members)[i]; |
| s->importAll(sc2); |
| } |
| |
| // Note that members.dim can grow due to tuple expansion during semantic() |
| for (size_t i = 0; i < members->dim; i++) |
| { |
| Dsymbol *s = (*members)[i]; |
| s->semantic(sc2); |
| } |
| |
| if (!determineFields()) |
| { |
| assert(type == Type::terror); |
| sc2->pop(); |
| return; |
| } |
| |
| /* Following special member functions creation needs semantic analysis |
| * completion of sub-structs in each field types. |
| */ |
| for (size_t i = 0; i < fields.dim; i++) |
| { |
| VarDeclaration *v = fields[i]; |
| Type *tb = v->type->baseElemOf(); |
| if (tb->ty != Tstruct) |
| continue; |
| StructDeclaration *sd = ((TypeStruct *)tb)->sym; |
| if (sd->semanticRun >= PASSsemanticdone) |
| continue; |
| |
| sc2->pop(); |
| |
| _scope = scx ? scx : sc->copy(); |
| _scope->setNoFree(); |
| _scope->_module->addDeferredSemantic(this); |
| //printf("\tdeferring %s\n", toChars()); |
| return; |
| } |
| |
| /* Look for special member functions. |
| * They must be in this class, not in a base class. |
| */ |
| |
| // Can be in base class |
| aggNew = (NewDeclaration *)search(Loc(), Id::classNew); |
| aggDelete = (DeleteDeclaration *)search(Loc(), Id::classDelete); |
| |
| // Look for the constructor |
| ctor = searchCtor(); |
| |
| if (!ctor && noDefaultCtor) |
| { |
| // A class object is always created by constructor, so this check is legitimate. |
| for (size_t i = 0; i < fields.dim; i++) |
| { |
| VarDeclaration *v = fields[i]; |
| if (v->storage_class & STCnodefaultctor) |
| ::error(v->loc, "field %s must be initialized in constructor", v->toChars()); |
| } |
| } |
| |
| // If this class has no constructor, but base class has a default |
| // ctor, create a constructor: |
| // this() { } |
| if (!ctor && baseClass && baseClass->ctor) |
| { |
| FuncDeclaration *fd = resolveFuncCall(loc, sc2, baseClass->ctor, NULL, type, NULL, 1); |
| if (!fd) // try shared base ctor instead |
| fd = resolveFuncCall(loc, sc2, baseClass->ctor, NULL, type->sharedOf(), NULL, 1); |
| if (fd && !fd->errors) |
| { |
| //printf("Creating default this(){} for class %s\n", toChars()); |
| TypeFunction *btf = fd->type->toTypeFunction(); |
| TypeFunction *tf = new TypeFunction(NULL, NULL, 0, LINKd, fd->storage_class); |
| tf->mod = btf->mod; |
| tf->purity = btf->purity; |
| tf->isnothrow = btf->isnothrow; |
| tf->isnogc = btf->isnogc; |
| tf->trust = btf->trust; |
| |
| CtorDeclaration *ctor = new CtorDeclaration(loc, Loc(), 0, tf); |
| ctor->fbody = new CompoundStatement(Loc(), new Statements()); |
| |
| members->push(ctor); |
| ctor->addMember(sc, this); |
| ctor->semantic(sc2); |
| |
| this->ctor = ctor; |
| defaultCtor = ctor; |
| } |
| else |
| { |
| error("cannot implicitly generate a default ctor when base class %s is missing a default ctor", |
| baseClass->toPrettyChars()); |
| } |
| } |
| |
| dtor = buildDtor(this, sc2); |
| |
| if (FuncDeclaration *f = hasIdentityOpAssign(this, sc2)) |
| { |
| if (!(f->storage_class & STCdisable)) |
| error(f->loc, "identity assignment operator overload is illegal"); |
| } |
| |
| inv = buildInv(this, sc2); |
| |
| Module::dprogress++; |
| semanticRun = PASSsemanticdone; |
| //printf("-ClassDeclaration.semantic(%s), type = %p\n", toChars(), type); |
| //members.print(); |
| |
| sc2->pop(); |
| |
| if (type->ty == Tclass && ((TypeClass *)type)->sym != this) |
| { |
| // https://issues.dlang.org/show_bug.cgi?id=17492 |
| ClassDeclaration *cd = ((TypeClass *)type)->sym; |
| error("already exists at %s. Perhaps in another function with the same name?", cd->loc.toChars()); |
| } |
| |
| if (global.errors != errors) |
| { |
| // The type is no good. |
| type = Type::terror; |
| this->errors = true; |
| if (deferred) |
| deferred->errors = true; |
| } |
| |
| // Verify fields of a synchronized class are not public |
| if (storage_class & STCsynchronized) |
| { |
| for (size_t i = 0; i < fields.dim; i++) |
| { |
| VarDeclaration *vd = fields[i]; |
| if (!vd->isThisDeclaration() && |
| !vd->prot().isMoreRestrictiveThan(Prot(PROTpublic))) |
| { |
| vd->error("Field members of a synchronized class cannot be %s", |
| protectionToChars(vd->prot().kind)); |
| } |
| } |
| } |
| |
| if (deferred && !global.gag) |
| { |
| deferred->semantic2(sc); |
| deferred->semantic3(sc); |
| } |
| //printf("-ClassDeclaration::semantic(%s), type = %p, sizeok = %d, this = %p\n", toChars(), type, sizeok, this); |
| } |
| |
| /********************************************* |
| * Determine if 'this' is a base class of cd. |
| * This is used to detect circular inheritance only. |
| */ |
| |
| bool ClassDeclaration::isBaseOf2(ClassDeclaration *cd) |
| { |
| if (!cd) |
| return false; |
| //printf("ClassDeclaration::isBaseOf2(this = '%s', cd = '%s')\n", toChars(), cd->toChars()); |
| for (size_t i = 0; i < cd->baseclasses->dim; i++) |
| { |
| BaseClass *b = (*cd->baseclasses)[i]; |
| if (b->sym == this || isBaseOf2(b->sym)) |
| return true; |
| } |
| return false; |
| } |
| |
| /******************************************* |
| * Determine if 'this' is a base class of cd. |
| */ |
| |
| bool ClassDeclaration::isBaseOf(ClassDeclaration *cd, int *poffset) |
| { |
| //printf("ClassDeclaration::isBaseOf(this = '%s', cd = '%s')\n", toChars(), cd->toChars()); |
| if (poffset) |
| *poffset = 0; |
| while (cd) |
| { |
| /* cd->baseClass might not be set if cd is forward referenced. |
| */ |
| if (!cd->baseClass && cd->_scope && !cd->isInterfaceDeclaration()) |
| { |
| cd->semantic(NULL); |
| if (!cd->baseClass && cd->_scope) |
| cd->error("base class is forward referenced by %s", toChars()); |
| } |
| |
| if (this == cd->baseClass) |
| return true; |
| |
| cd = cd->baseClass; |
| } |
| return false; |
| } |
| |
| /********************************************* |
| * Determine if 'this' has complete base class information. |
| * This is used to detect forward references in covariant overloads. |
| */ |
| |
| bool ClassDeclaration::isBaseInfoComplete() |
| { |
| return baseok >= BASEOKdone; |
| } |
| |
| Dsymbol *ClassDeclaration::search(const Loc &loc, Identifier *ident, int flags) |
| { |
| //printf("%s.ClassDeclaration::search('%s', flags=x%x)\n", toChars(), ident->toChars(), flags); |
| |
| //if (_scope) printf("%s baseok = %d\n", toChars(), baseok); |
| if (_scope && baseok < BASEOKdone) |
| { |
| if (!inuse) |
| { |
| // must semantic on base class/interfaces |
| ++inuse; |
| semantic(NULL); |
| --inuse; |
| } |
| } |
| |
| if (!members || !symtab) // opaque or addMember is not yet done |
| { |
| error("is forward referenced when looking for '%s'", ident->toChars()); |
| //*(char*)0=0; |
| return NULL; |
| } |
| |
| Dsymbol *s = ScopeDsymbol::search(loc, ident, flags); |
| |
| // don't search imports of base classes |
| if (flags & SearchImportsOnly) |
| return s; |
| |
| if (!s) |
| { |
| // Search bases classes in depth-first, left to right order |
| |
| for (size_t i = 0; i < baseclasses->dim; i++) |
| { |
| BaseClass *b = (*baseclasses)[i]; |
| |
| if (b->sym) |
| { |
| if (!b->sym->symtab) |
| error("base %s is forward referenced", b->sym->ident->toChars()); |
| else |
| { |
| s = b->sym->search(loc, ident, flags); |
| if (!s) |
| continue; |
| else if (s == this) // happens if s is nested in this and derives from this |
| s = NULL; |
| else if (!(flags & IgnoreSymbolVisibility) && !(s->prot().kind == PROTprotected) && !symbolIsVisible(this, s)) |
| s = NULL; |
| else |
| break; |
| } |
| } |
| } |
| } |
| return s; |
| } |
| |
| /************************************ |
| * Search base classes in depth-first, left-to-right order for |
| * a class or interface named 'ident'. |
| * Stops at first found. Does not look for additional matches. |
| * Params: |
| * ident = identifier to search for |
| * Returns: |
| * ClassDeclaration if found, null if not |
| */ |
| ClassDeclaration *ClassDeclaration::searchBase(Identifier *ident) |
| { |
| for (size_t i = 0; i < baseclasses->dim; i++) |
| { |
| BaseClass *b = (*baseclasses)[i]; |
| ClassDeclaration *cdb = b->type->isClassHandle(); |
| if (!cdb) // Bugzilla 10616 |
| return NULL; |
| if (cdb->ident->equals(ident)) |
| return cdb; |
| cdb = cdb->searchBase(ident); |
| if (cdb) |
| return cdb; |
| } |
| return NULL; |
| } |
| |
| /**** |
| * Runs through the inheritance graph to set the BaseClass.offset fields. |
| * Recursive in order to account for the size of the interface classes, if they are |
| * more than just interfaces. |
| * Params: |
| * cd = interface to look at |
| * baseOffset = offset of where cd will be placed |
| * Returns: |
| * subset of instantiated size used by cd for interfaces |
| */ |
| static unsigned membersPlace(BaseClasses *vtblInterfaces, size_t &bi, ClassDeclaration *cd, unsigned baseOffset) |
| { |
| //printf(" membersPlace(%s, %d)\n", cd->toChars(), baseOffset); |
| unsigned offset = baseOffset; |
| |
| for (size_t i = 0; i < cd->interfaces.length; i++) |
| { |
| BaseClass *b = cd->interfaces.ptr[i]; |
| if (b->sym->sizeok != SIZEOKdone) |
| b->sym->finalizeSize(); |
| assert(b->sym->sizeok == SIZEOKdone); |
| |
| if (!b->sym->alignsize) |
| b->sym->alignsize = Target::ptrsize; |
| cd->alignmember(b->sym->alignsize, b->sym->alignsize, &offset); |
| assert(bi < vtblInterfaces->dim); |
| BaseClass *bv = (*vtblInterfaces)[bi]; |
| if (b->sym->interfaces.length == 0) |
| { |
| //printf("\tvtblInterfaces[%d] b=%p b->sym = %s, offset = %d\n", bi, bv, bv->sym->toChars(), offset); |
| bv->offset = offset; |
| ++bi; |
| // All the base interfaces down the left side share the same offset |
| for (BaseClass *b2 = bv; b2->baseInterfaces.length; ) |
| { |
| b2 = &b2->baseInterfaces.ptr[0]; |
| b2->offset = offset; |
| //printf("\tvtblInterfaces[%d] b=%p sym = %s, offset = %d\n", bi, b2, b2->sym->toChars(), b2->offset); |
| } |
| } |
| membersPlace(vtblInterfaces, bi, b->sym, offset); |
| //printf(" %s size = %d\n", b->sym->toChars(), b->sym->structsize); |
| offset += b->sym->structsize; |
| if (cd->alignsize < b->sym->alignsize) |
| cd->alignsize = b->sym->alignsize; |
| } |
| return offset - baseOffset; |
| } |
| |
| void ClassDeclaration::finalizeSize() |
| { |
| assert(sizeok != SIZEOKdone); |
| |
| // Set the offsets of the fields and determine the size of the class |
| if (baseClass) |
| { |
| assert(baseClass->sizeok == SIZEOKdone); |
| |
| alignsize = baseClass->alignsize; |
| structsize = baseClass->structsize; |
| if (cpp && global.params.isWindows) |
| structsize = (structsize + alignsize - 1) & ~(alignsize - 1); |
| } |
| else if (isInterfaceDeclaration()) |
| { |
| if (interfaces.length == 0) |
| { |
| alignsize = Target::ptrsize; |
| structsize = Target::ptrsize; // allow room for __vptr |
| } |
| } |
| else |
| { |
| alignsize = Target::ptrsize; |
| structsize = Target::ptrsize; // allow room for __vptr |
| if (!cpp) |
| structsize += Target::ptrsize; // allow room for __monitor |
| } |
| |
| //printf("finalizeSize() %s, sizeok = %d\n", toChars(), sizeok); |
| size_t bi = 0; // index into vtblInterfaces[] |
| |
| // Add vptr's for any interfaces implemented by this class |
| structsize += membersPlace(vtblInterfaces, bi, this, structsize); |
| |
| if (isInterfaceDeclaration()) |
| { |
| sizeok = SIZEOKdone; |
| return; |
| } |
| |
| // FIXME: Currently setFieldOffset functions need to increase fields |
| // to calculate each variable offsets. It can be improved later. |
| fields.setDim(0); |
| |
| unsigned offset = structsize; |
| for (size_t i = 0; i < members->dim; i++) |
| { |
| Dsymbol *s = (*members)[i]; |
| s->setFieldOffset(this, &offset, false); |
| } |
| |
| sizeok = SIZEOKdone; |
| |
| // Calculate fields[i]->overlapped |
| checkOverlappedFields(); |
| } |
| |
| /********************************************************** |
| * fd is in the vtbl[] for this class. |
| * Return 1 if function is hidden (not findable through search). |
| */ |
| |
| int isf(void *param, Dsymbol *s) |
| { |
| FuncDeclaration *fd = s->isFuncDeclaration(); |
| if (!fd) |
| return 0; |
| //printf("param = %p, fd = %p %s\n", param, fd, fd->toChars()); |
| return (RootObject *)param == fd; |
| } |
| |
| bool ClassDeclaration::isFuncHidden(FuncDeclaration *fd) |
| { |
| //printf("ClassDeclaration::isFuncHidden(class = %s, fd = %s)\n", toChars(), fd->toPrettyChars()); |
| Dsymbol *s = search(Loc(), fd->ident, IgnoreAmbiguous | IgnoreErrors); |
| if (!s) |
| { |
| //printf("not found\n"); |
| /* Because, due to a hack, if there are multiple definitions |
| * of fd->ident, NULL is returned. |
| */ |
| return false; |
| } |
| s = s->toAlias(); |
| OverloadSet *os = s->isOverloadSet(); |
| if (os) |
| { |
| for (size_t i = 0; i < os->a.dim; i++) |
| { |
| Dsymbol *s2 = os->a[i]; |
| FuncDeclaration *f2 = s2->isFuncDeclaration(); |
| if (f2 && overloadApply(f2, (void *)fd, &isf)) |
| return false; |
| } |
| return true; |
| } |
| else |
| { |
| FuncDeclaration *fdstart = s->isFuncDeclaration(); |
| //printf("%s fdstart = %p\n", s->kind(), fdstart); |
| if (overloadApply(fdstart, (void *)fd, &isf)) |
| return false; |
| |
| return !fd->parent->isTemplateMixin(); |
| } |
| } |
| |
| /**************** |
| * Find virtual function matching identifier and type. |
| * Used to build virtual function tables for interface implementations. |
| */ |
| |
| FuncDeclaration *ClassDeclaration::findFunc(Identifier *ident, TypeFunction *tf) |
| { |
| //printf("ClassDeclaration::findFunc(%s, %s) %s\n", ident->toChars(), tf->toChars(), toChars()); |
| FuncDeclaration *fdmatch = NULL; |
| FuncDeclaration *fdambig = NULL; |
| |
| ClassDeclaration *cd = this; |
| Dsymbols *vtbl = &cd->vtbl; |
| while (1) |
| { |
| for (size_t i = 0; i < vtbl->dim; i++) |
| { |
| FuncDeclaration *fd = (*vtbl)[i]->isFuncDeclaration(); |
| if (!fd) |
| continue; // the first entry might be a ClassInfo |
| |
| //printf("\t[%d] = %s\n", i, fd->toChars()); |
| if (ident == fd->ident && |
| fd->type->covariant(tf) == 1) |
| { |
| //printf("fd->parent->isClassDeclaration() = %p\n", fd->parent->isClassDeclaration()); |
| if (!fdmatch) |
| goto Lfd; |
| if (fd == fdmatch) |
| goto Lfdmatch; |
| |
| { |
| // Function type matcing: exact > covariant |
| MATCH m1 = tf->equals(fd ->type) ? MATCHexact : MATCHnomatch; |
| MATCH m2 = tf->equals(fdmatch->type) ? MATCHexact : MATCHnomatch; |
| if (m1 > m2) |
| goto Lfd; |
| else if (m1 < m2) |
| goto Lfdmatch; |
| } |
| |
| { |
| MATCH m1 = (tf->mod == fd ->type->mod) ? MATCHexact : MATCHnomatch; |
| MATCH m2 = (tf->mod == fdmatch->type->mod) ? MATCHexact : MATCHnomatch; |
| if (m1 > m2) |
| goto Lfd; |
| else if (m1 < m2) |
| goto Lfdmatch; |
| } |
| |
| { |
| // The way of definition: non-mixin > mixin |
| MATCH m1 = fd ->parent->isClassDeclaration() ? MATCHexact : MATCHnomatch; |
| MATCH m2 = fdmatch->parent->isClassDeclaration() ? MATCHexact : MATCHnomatch; |
| if (m1 > m2) |
| goto Lfd; |
| else if (m1 < m2) |
| goto Lfdmatch; |
| } |
| |
| fdambig = fd; |
| //printf("Lambig fdambig = %s %s [%s]\n", fdambig->toChars(), fdambig->type->toChars(), fdambig->loc.toChars()); |
| continue; |
| |
| Lfd: |
| fdmatch = fd; |
| fdambig = NULL; |
| //printf("Lfd fdmatch = %s %s [%s]\n", fdmatch->toChars(), fdmatch->type->toChars(), fdmatch->loc.toChars()); |
| continue; |
| |
| Lfdmatch: |
| continue; |
| } |
| //else printf("\t\t%d\n", fd->type->covariant(tf)); |
| } |
| if (!cd) |
| break; |
| vtbl = &cd->vtblFinal; |
| cd = cd->baseClass; |
| } |
| |
| if (fdambig) |
| error("ambiguous virtual function %s", fdambig->toChars()); |
| return fdmatch; |
| } |
| |
| void ClassDeclaration::interfaceSemantic(Scope *) |
| { |
| vtblInterfaces = new BaseClasses(); |
| vtblInterfaces->reserve(interfaces.length); |
| |
| for (size_t i = 0; i < interfaces.length; i++) |
| { |
| BaseClass *b = interfaces.ptr[i]; |
| vtblInterfaces->push(b); |
| b->copyBaseInterfaces(vtblInterfaces); |
| } |
| } |
| |
| /**************************************** |
| */ |
| |
| bool ClassDeclaration::isCOMclass() const |
| { |
| return com; |
| } |
| |
| bool ClassDeclaration::isCOMinterface() const |
| { |
| return false; |
| } |
| |
| bool ClassDeclaration::isCPPclass() const |
| { |
| return cpp; |
| } |
| |
| bool ClassDeclaration::isCPPinterface() const |
| { |
| return false; |
| } |
| |
| |
| /**************************************** |
| */ |
| |
| bool ClassDeclaration::isAbstract() |
| { |
| if (isabstract != ABSfwdref) |
| return isabstract == ABSyes; |
| |
| /* Bugzilla 11169: Resolve forward references to all class member functions, |
| * and determine whether this class is abstract. |
| */ |
| struct SearchAbstract |
| { |
| static int fp(Dsymbol *s, void *) |
| { |
| FuncDeclaration *fd = s->isFuncDeclaration(); |
| if (!fd) |
| return 0; |
| if (fd->storage_class & STCstatic) |
| return 0; |
| |
| if (fd->_scope) |
| fd->semantic(NULL); |
| |
| if (fd->isAbstract()) |
| return 1; |
| return 0; |
| } |
| }; |
| |
| for (size_t i = 0; i < members->dim; i++) |
| { |
| Dsymbol *s = (*members)[i]; |
| if (s->apply(&SearchAbstract::fp, this)) |
| { |
| isabstract = ABSyes; |
| return true; |
| } |
| } |
| |
| /* Iterate inherited member functions and check their abstract attribute. |
| */ |
| for (size_t i = 1; i < vtbl.dim; i++) |
| { |
| FuncDeclaration *fd = vtbl[i]->isFuncDeclaration(); |
| //if (fd) printf("\tvtbl[%d] = [%s] %s\n", i, fd->loc.toChars(), fd->toChars()); |
| if (!fd || fd->isAbstract()) |
| { |
| isabstract = ABSyes; |
| return true; |
| } |
| } |
| |
| isabstract = ABSno; |
| return false; |
| } |
| |
| |
| /**************************************** |
| * Determine if slot 0 of the vtbl[] is reserved for something else. |
| * For class objects, yes, this is where the classinfo ptr goes. |
| * For COM interfaces, no. |
| * For non-COM interfaces, yes, this is where the Interface ptr goes. |
| * Returns: |
| * 0 vtbl[0] is first virtual function pointer |
| * 1 vtbl[0] is classinfo/interfaceinfo pointer |
| */ |
| |
| int ClassDeclaration::vtblOffset() const |
| { |
| return cpp ? 0 : 1; |
| } |
| |
| /**************************************** |
| */ |
| |
| const char *ClassDeclaration::kind() const |
| { |
| return "class"; |
| } |
| |
| /**************************************** |
| */ |
| |
| void ClassDeclaration::addLocalClass(ClassDeclarations *aclasses) |
| { |
| aclasses->push(this); |
| } |
| |
| /********************************* InterfaceDeclaration ****************************/ |
| |
| InterfaceDeclaration::InterfaceDeclaration(Loc loc, Identifier *id, BaseClasses *baseclasses) |
| : ClassDeclaration(loc, id, baseclasses, NULL, false) |
| { |
| if (id == Id::IUnknown) // IUnknown is the root of all COM interfaces |
| { |
| com = true; |
| cpp = true; // IUnknown is also a C++ interface |
| } |
| } |
| |
| Dsymbol *InterfaceDeclaration::syntaxCopy(Dsymbol *s) |
| { |
| InterfaceDeclaration *id = |
| s ? (InterfaceDeclaration *)s |
| : new InterfaceDeclaration(loc, ident, NULL); |
| return ClassDeclaration::syntaxCopy(id); |
| } |
| |
| Scope *InterfaceDeclaration::newScope(Scope *sc) |
| { |
| Scope *sc2 = ClassDeclaration::newScope(sc); |
| if (com) |
| sc2->linkage = LINKwindows; |
| else if (cpp) |
| sc2->linkage = LINKcpp; |
| else if (isobjc) |
| sc2->linkage = LINKobjc; |
| return sc2; |
| } |
| |
| void InterfaceDeclaration::semantic(Scope *sc) |
| { |
| //printf("InterfaceDeclaration::semantic(%s), type = %p\n", toChars(), type); |
| if (semanticRun >= PASSsemanticdone) |
| return; |
| unsigned errors = global.errors; |
| |
| //printf("+InterfaceDeclaration.semantic(%s), type = %p\n", toChars(), type); |
| |
| Scope *scx = NULL; |
| if (_scope) |
| { |
| sc = _scope; |
| scx = _scope; // save so we don't make redundant copies |
| _scope = NULL; |
| } |
| |
| if (!parent) |
| { |
| assert(sc->parent && sc->func); |
| parent = sc->parent; |
| } |
| assert(parent && !isAnonymous()); |
| |
| if (this->errors) |
| type = Type::terror; |
| type = type->semantic(loc, sc); |
| |
| if (type->ty == Tclass && ((TypeClass *)type)->sym != this) |
| { |
| TemplateInstance *ti = ((TypeClass *)type)->sym->isInstantiated(); |
| if (ti && isError(ti)) |
| ((TypeClass *)type)->sym = this; |
| } |
| |
| // Ungag errors when not speculative |
| Ungag ungag = ungagSpeculative(); |
| |
| if (semanticRun == PASSinit) |
| { |
| protection = sc->protection; |
| |
| storage_class |= sc->stc; |
| if (storage_class & STCdeprecated) |
| isdeprecated = true; |
| |
| userAttribDecl = sc->userAttribDecl; |
| } |
| else if (symtab) |
| { |
| if (sizeok == SIZEOKdone || !scx) |
| { |
| semanticRun = PASSsemanticdone; |
| return; |
| } |
| } |
| semanticRun = PASSsemantic; |
| |
| if (baseok < BASEOKdone) |
| { |
| baseok = BASEOKin; |
| |
| // Expand any tuples in baseclasses[] |
| for (size_t i = 0; i < baseclasses->dim; ) |
| { |
| BaseClass *b = (*baseclasses)[i]; |
| b->type = resolveBase(this, sc, scx, b->type); |
| |
| Type *tb = b->type->toBasetype(); |
| if (tb->ty == Ttuple) |
| { |
| TypeTuple *tup = (TypeTuple *)tb; |
| baseclasses->remove(i); |
| size_t dim = Parameter::dim(tup->arguments); |
| for (size_t j = 0; j < dim; j++) |
| { |
| Parameter *arg = Parameter::getNth(tup->arguments, j); |
| b = new BaseClass(arg->type); |
| baseclasses->insert(i + j, b); |
| } |
| } |
| else |
| i++; |
| } |
| |
| if (baseok >= BASEOKdone) |
| { |
| //printf("%s already semantic analyzed, semanticRun = %d\n", toChars(), semanticRun); |
| if (semanticRun >= PASSsemanticdone) |
| return; |
| goto Lancestorsdone; |
| } |
| |
| if (!baseclasses->dim && sc->linkage == LINKcpp) |
| cpp = true; |
| if (sc->linkage == LINKobjc) |
| objc()->setObjc(this); |
| |
| // Check for errors, handle forward references |
| for (size_t i = 0; i < baseclasses->dim; ) |
| { |
| BaseClass *b = (*baseclasses)[i]; |
| Type *tb = b->type->toBasetype(); |
| TypeClass *tc = (tb->ty == Tclass) ? (TypeClass *)tb : NULL; |
| if (!tc || !tc->sym->isInterfaceDeclaration()) |
| { |
| if (b->type != Type::terror) |
| error("base type must be interface, not %s", b->type->toChars()); |
| baseclasses->remove(i); |
| continue; |
| } |
| |
| // Check for duplicate interfaces |
| for (size_t j = 0; j < i; j++) |
| { |
| BaseClass *b2 = (*baseclasses)[j]; |
| if (b2->sym == tc->sym) |
| { |
| error("inherits from duplicate interface %s", b2->sym->toChars()); |
| baseclasses->remove(i); |
| continue; |
| } |
| } |
| |
| if (tc->sym == this || isBaseOf2(tc->sym)) |
| { |
| error("circular inheritance of interface"); |
| baseclasses->remove(i); |
| continue; |
| } |
| |
| if (tc->sym->isDeprecated()) |
| { |
| if (!isDeprecated()) |
| { |
| // Deriving from deprecated class makes this one deprecated too |
| isdeprecated = true; |
| |
| tc->checkDeprecated(loc, sc); |
| } |
| } |
| |
| b->sym = tc->sym; |
| |
| if (tc->sym->_scope && tc->sym->baseok < BASEOKdone) |
| resolveBase(this, sc, scx, tc->sym); // Try to resolve forward reference |
| if (tc->sym->baseok < BASEOKdone) |
| { |
| //printf("\ttry later, forward reference of base %s\n", tc->sym->toChars()); |
| if (tc->sym->_scope) |
| tc->sym->_scope->_module->addDeferredSemantic(tc->sym); |
| baseok = BASEOKnone; |
| } |
| i++; |
| } |
| if (baseok == BASEOKnone) |
| { |
| // Forward referencee of one or more bases, try again later |
| _scope = scx ? scx : sc->copy(); |
| _scope->setNoFree(); |
| _scope->_module->addDeferredSemantic(this); |
| return; |
| } |
| baseok = BASEOKdone; |
| |
| interfaces.length = baseclasses->dim; |
| interfaces.ptr = baseclasses->tdata(); |
| |
| for (size_t i = 0; i < interfaces.length; i++) |
| { |
| BaseClass *b = interfaces.ptr[i]; |
| // If this is an interface, and it derives from a COM interface, |
| // then this is a COM interface too. |
| if (b->sym->isCOMinterface()) |
| com = true; |
| if (b->sym->isCPPinterface()) |
| cpp = true; |
| } |
| |
| interfaceSemantic(sc); |
| } |
| Lancestorsdone: |
| |
| if (!members) // if opaque declaration |
| { |
| semanticRun = PASSsemanticdone; |
| return; |
| } |
| if (!symtab) |
| symtab = new DsymbolTable(); |
| |
| for (size_t i = 0; i < baseclasses->dim; i++) |
| { |
| BaseClass *b = (*baseclasses)[i]; |
| Type *tb = b->type->toBasetype(); |
| assert(tb->ty == Tclass); |
| TypeClass *tc = (TypeClass *)tb; |
| |
| if (tc->sym->semanticRun < PASSsemanticdone) |
| { |
| // Forward referencee of one or more bases, try again later |
| _scope = scx ? scx : sc->copy(); |
| _scope->setNoFree(); |
| if (tc->sym->_scope) |
| tc->sym->_scope->_module->addDeferredSemantic(tc->sym); |
| _scope->_module->addDeferredSemantic(this); |
| return; |
| } |
| } |
| |
| if (baseok == BASEOKdone) |
| { |
| baseok = BASEOKsemanticdone; |
| |
| // initialize vtbl |
| if (vtblOffset()) |
| vtbl.push(this); // leave room at vtbl[0] for classinfo |
| |
| // Cat together the vtbl[]'s from base interfaces |
| for (size_t i = 0; i < interfaces.length; i++) |
| { |
| BaseClass *b = interfaces.ptr[i]; |
| |
| // Skip if b has already appeared |
| for (size_t k = 0; k < i; k++) |
| { |
| if (b == interfaces.ptr[k]) |
| goto Lcontinue; |
| } |
| |
| // Copy vtbl[] from base class |
| if (b->sym->vtblOffset()) |
| { |
| size_t d = b->sym->vtbl.dim; |
| if (d > 1) |
| { |
| vtbl.reserve(d - 1); |
| for (size_t j = 1; j < d; j++) |
| vtbl.push(b->sym->vtbl[j]); |
| } |
| } |
| else |
| { |
| vtbl.append(&b->sym->vtbl); |
| } |
| |
| Lcontinue: |
| ; |
| } |
| } |
| |
| for (size_t i = 0; i < members->dim; i++) |
| { |
| Dsymbol *s = (*members)[i]; |
| s->addMember(sc, this); |
| } |
| |
| Scope *sc2 = newScope(sc); |
| |
| /* Set scope so if there are forward references, we still might be able to |
| * resolve individual members like enums. |
| */ |
| for (size_t i = 0; i < members->dim; i++) |
| { |
| Dsymbol *s = (*members)[i]; |
| //printf("setScope %s %s\n", s->kind(), s->toChars()); |
| s->setScope(sc2); |
| } |
| |
| for (size_t i = 0; i < members->dim; i++) |
| { |
| Dsymbol *s = (*members)[i]; |
| s->importAll(sc2); |
| } |
| |
| for (size_t i = 0; i < members->dim; i++) |
| { |
| Dsymbol *s = (*members)[i]; |
| s->semantic(sc2); |
| } |
| |
| Module::dprogress++; |
| semanticRun = PASSsemanticdone; |
| //printf("-InterfaceDeclaration.semantic(%s), type = %p\n", toChars(), type); |
| //members->print(); |
| |
| sc2->pop(); |
| |
| if (global.errors != errors) |
| { |
| // The type is no good. |
| type = Type::terror; |
| } |
| |
| assert(type->ty != Tclass || ((TypeClass *)type)->sym == this); |
| } |
| |
| /******************************************* |
| * Determine if 'this' is a base class of cd. |
| * (Actually, if it is an interface supported by cd) |
| * Output: |
| * *poffset offset to start of class |
| * OFFSET_RUNTIME must determine offset at runtime |
| * Returns: |
| * false not a base |
| * true is a base |
| */ |
| |
| bool InterfaceDeclaration::isBaseOf(ClassDeclaration *cd, int *poffset) |
| { |
| //printf("%s.InterfaceDeclaration::isBaseOf(cd = '%s')\n", toChars(), cd->toChars()); |
| assert(!baseClass); |
| for (size_t j = 0; j < cd->interfaces.length; j++) |
| { |
| BaseClass *b = cd->interfaces.ptr[j]; |
| |
| //printf("\tX base %s\n", b->sym->toChars()); |
| if (this == b->sym) |
| { |
| //printf("\tfound at offset %d\n", b->offset); |
| if (poffset) |
| { |
| // don't return incorrect offsets https://issues.dlang.org/show_bug.cgi?id=16980 |
| *poffset = cd->sizeok == SIZEOKdone ? b->offset : OFFSET_FWDREF; |
| } |
| //printf("\tfound at offset %d\n", b->offset); |
| return true; |
| } |
| if (isBaseOf(b, poffset)) |
| return true; |
| } |
| |
| if (cd->baseClass && isBaseOf(cd->baseClass, poffset)) |
| return true; |
| |
| if (poffset) |
| *poffset = 0; |
| return false; |
| } |
| |
| bool InterfaceDeclaration::isBaseOf(BaseClass *bc, int *poffset) |
| { |
| //printf("%s.InterfaceDeclaration::isBaseOf(bc = '%s')\n", toChars(), bc->sym->toChars()); |
| for (size_t j = 0; j < bc->baseInterfaces.length; j++) |
| { |
| BaseClass *b = &bc->baseInterfaces.ptr[j]; |
| |
| //printf("\tY base %s\n", b->sym->toChars()); |
| if (this == b->sym) |
| { |
| //printf("\tfound at offset %d\n", b->offset); |
| if (poffset) |
| { |
| *poffset = b->offset; |
| } |
| return true; |
| } |
| if (isBaseOf(b, poffset)) |
| { |
| return true; |
| } |
| } |
| if (poffset) |
| *poffset = 0; |
| return false; |
| } |
| |
| /**************************************** |
| * Determine if slot 0 of the vtbl[] is reserved for something else. |
| * For class objects, yes, this is where the ClassInfo ptr goes. |
| * For COM interfaces, no. |
| * For non-COM interfaces, yes, this is where the Interface ptr goes. |
| */ |
| |
| int InterfaceDeclaration::vtblOffset() const |
| { |
| if (isCOMinterface() || isCPPinterface()) |
| return 0; |
| return 1; |
| } |
| |
| bool InterfaceDeclaration::isCOMinterface() const |
| { |
| return com; |
| } |
| |
| bool InterfaceDeclaration::isCPPinterface() const |
| { |
| return cpp; |
| } |
| |
| /******************************************* |
| */ |
| |
| const char *InterfaceDeclaration::kind() const |
| { |
| return "interface"; |
| } |
| |
| |
| /******************************** BaseClass *****************************/ |
| |
| BaseClass::BaseClass() |
| { |
| this->type = NULL; |
| this->sym = NULL; |
| this->offset = 0; |
| |
| this->baseInterfaces.length = 0; |
| this->baseInterfaces.ptr = NULL; |
| } |
| |
| BaseClass::BaseClass(Type *type) |
| { |
| //printf("BaseClass(this = %p, '%s')\n", this, type->toChars()); |
| this->type = type; |
| this->sym = NULL; |
| this->offset = 0; |
| |
| this->baseInterfaces.length = 0; |
| this->baseInterfaces.ptr = NULL; |
| } |
| |
| /**************************************** |
| * Fill in vtbl[] for base class based on member functions of class cd. |
| * Input: |
| * vtbl if !=NULL, fill it in |
| * newinstance !=0 means all entries must be filled in by members |
| * of cd, not members of any base classes of cd. |
| * Returns: |
| * true if any entries were filled in by members of cd (not exclusively |
| * by base classes) |
| */ |
| |
| bool BaseClass::fillVtbl(ClassDeclaration *cd, FuncDeclarations *vtbl, int newinstance) |
| { |
| bool result = false; |
| |
| //printf("BaseClass::fillVtbl(this='%s', cd='%s')\n", sym->toChars(), cd->toChars()); |
| if (vtbl) |
| vtbl->setDim(sym->vtbl.dim); |
| |
| // first entry is ClassInfo reference |
| for (size_t j = sym->vtblOffset(); j < sym->vtbl.dim; j++) |
| { |
| FuncDeclaration *ifd = sym->vtbl[j]->isFuncDeclaration(); |
| FuncDeclaration *fd; |
| TypeFunction *tf; |
| |
| //printf(" vtbl[%d] is '%s'\n", j, ifd ? ifd->toChars() : "null"); |
| |
| assert(ifd); |
| // Find corresponding function in this class |
| tf = ifd->type->toTypeFunction(); |
| fd = cd->findFunc(ifd->ident, tf); |
| if (fd && !fd->isAbstract()) |
| { |
| //printf(" found\n"); |
| // Check that calling conventions match |
| if (fd->linkage != ifd->linkage) |
| fd->error("linkage doesn't match interface function"); |
| |
| // Check that it is current |
| //printf("newinstance = %d fd->toParent() = %s ifd->toParent() = %s\n", |
| //newinstance, fd->toParent()->toChars(), ifd->toParent()->toChars()); |
| if (newinstance && fd->toParent() != cd && ifd->toParent() == sym) |
| cd->error("interface function '%s' is not implemented", ifd->toFullSignature()); |
| |
| if (fd->toParent() == cd) |
| result = true; |
| } |
| else |
| { |
| //printf(" not found %p\n", fd); |
| // BUG: should mark this class as abstract? |
| if (!cd->isAbstract()) |
| cd->error("interface function '%s' is not implemented", ifd->toFullSignature()); |
| |
| fd = NULL; |
| } |
| if (vtbl) |
| (*vtbl)[j] = fd; |
| } |
| |
| return result; |
| } |
| |
| void BaseClass::copyBaseInterfaces(BaseClasses *vtblInterfaces) |
| { |
| //printf("+copyBaseInterfaces(), %s\n", sym->toChars()); |
| // if (baseInterfaces.length) |
| // return; |
| |
| baseInterfaces.length = sym->interfaces.length; |
| baseInterfaces.ptr = (BaseClass *)mem.xcalloc(baseInterfaces.length, sizeof(BaseClass)); |
| |
| //printf("%s.copyBaseInterfaces()\n", sym->toChars()); |
| for (size_t i = 0; i < baseInterfaces.length; i++) |
| { |
| void *pb = &baseInterfaces.ptr[i]; |
| BaseClass *b2 = sym->interfaces.ptr[i]; |
| |
| assert(b2->vtbl.dim == 0); // should not be filled yet |
| BaseClass *b = (BaseClass *)memcpy(pb, b2, sizeof(BaseClass)); |
| |
| if (i) // single inheritance is i==0 |
| vtblInterfaces->push(b); // only need for M.I. |
| b->copyBaseInterfaces(vtblInterfaces); |
| } |
| //printf("-copyBaseInterfaces\n"); |
| } |
