Mercurial > projects > ldc
view dmd2/aggregate.h @ 1317:4099548c80e0
Allocate objects on the stack if they (a) don't have a destructor, and
(b) don't override the delete operator (on top of the regular conditions for
stack allocation that also apply to arrays, structs, etc.).
The "no destructor" clause is not strictly necessary, but calling them at the
right time would be tricky to say the least; it would involve, among other
things, "manually" inserting a try-finally block around anything that might
throw exceptions not caught in the current function.
Note: objects with custom new operators are automatically ignored because they
don't use the regular allocation runtime call, so there's no need to pay special
attention to them.
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Sat, 09 May 2009 00:50:15 +0200 |
parents | 340acf1535d0 |
children | 638d16625da2 |
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// Compiler implementation of the D programming language // Copyright (c) 1999-2008 by Digital Mars // All Rights Reserved // written by Walter Bright // http://www.digitalmars.com // License for redistribution is by either the Artistic License // in artistic.txt, or the GNU General Public License in gnu.txt. // See the included readme.txt for details. #ifndef DMD_AGGREGATE_H #define DMD_AGGREGATE_H #ifdef __DMC__ #pragma once #endif /* __DMC__ */ #include "root.h" #include "dsymbol.h" #include <vector> #include <set> #include <map> struct Identifier; struct Type; struct TypeFunction; struct Expression; struct FuncDeclaration; struct CtorDeclaration; struct DtorDeclaration; struct InvariantDeclaration; struct NewDeclaration; struct DeleteDeclaration; struct InterfaceDeclaration; struct ClassInfoDeclaration; struct VarDeclaration; struct dt_t; namespace llvm { class Type; class Value; class Constant; class ConstantStruct; class GlobalVariable; } struct AggregateDeclaration : ScopeDsymbol { Type *type; unsigned storage_class; enum PROT protection; Type *handle; // 'this' type unsigned structsize; // size of struct unsigned alignsize; // size of struct for alignment purposes unsigned structalign; // struct member alignment in effect int hasUnions; // set if aggregate has overlapping fields Array fields; // VarDeclaration fields unsigned sizeok; // set when structsize contains valid data // 0: no size // 1: size is correct // 2: cannot determine size; fwd referenced int isdeprecated; // !=0 if deprecated Scope *scope; // !=NULL means context to use // Special member functions InvariantDeclaration *inv; // invariant NewDeclaration *aggNew; // allocator DeleteDeclaration *aggDelete; // deallocator #if DMDV2 CtorDeclaration *ctor; CtorDeclaration *defaultCtor; // default constructor #endif FuncDeclarations dtors; // Array of destructors FuncDeclaration *dtor; // aggregate destructor #ifdef IN_GCC Array methods; // flat list of all methods for debug information #endif AggregateDeclaration(Loc loc, Identifier *id); void semantic2(Scope *sc); void semantic3(Scope *sc); void inlineScan(); unsigned size(Loc loc); static void alignmember(unsigned salign, unsigned size, unsigned *poffset); Type *getType(); void addField(Scope *sc, VarDeclaration *v); int isDeprecated(); // is aggregate deprecated? FuncDeclaration *buildDtor(Scope *sc); void emitComment(Scope *sc); void toDocBuffer(OutBuffer *buf); // For access checking virtual PROT getAccess(Dsymbol *smember); // determine access to smember int isFriendOf(AggregateDeclaration *cd); int hasPrivateAccess(Dsymbol *smember); // does smember have private access to members of this class? void accessCheck(Loc loc, Scope *sc, Dsymbol *smember); enum PROT prot(); // Back end Symbol *stag; // tag symbol for debug data Symbol *sinit; Symbol *toInitializer(); AggregateDeclaration *isAggregateDeclaration() { return this; } }; struct AnonymousAggregateDeclaration : AggregateDeclaration { AnonymousAggregateDeclaration() : AggregateDeclaration(0, NULL) { } AnonymousAggregateDeclaration *isAnonymousAggregateDeclaration() { return this; } }; struct StructDeclaration : AggregateDeclaration { int zeroInit; // !=0 if initialize with 0 fill #if DMDV2 int hasIdentityAssign; // !=0 if has identity opAssign FuncDeclaration *cpctor; // generated copy-constructor, if any FuncDeclarations postblits; // Array of postblit functions FuncDeclaration *postblit; // aggregate postblit #endif StructDeclaration(Loc loc, Identifier *id); Dsymbol *syntaxCopy(Dsymbol *s); void semantic(Scope *sc); void toCBuffer(OutBuffer *buf, HdrGenState *hgs); char *mangle(); const char *kind(); int needOpAssign(); FuncDeclaration *buildOpAssign(Scope *sc); FuncDeclaration *buildPostBlit(Scope *sc); FuncDeclaration *buildCpCtor(Scope *sc); void toDocBuffer(OutBuffer *buf); PROT getAccess(Dsymbol *smember); // determine access to smember void toObjFile(int multiobj); // compile to .obj file void toDt(dt_t **pdt); void toDebug(); // to symbolic debug info StructDeclaration *isStructDeclaration() { return this; } }; struct UnionDeclaration : StructDeclaration { UnionDeclaration(Loc loc, Identifier *id); Dsymbol *syntaxCopy(Dsymbol *s); const char *kind(); UnionDeclaration *isUnionDeclaration() { return this; } }; struct BaseClass { Type *type; // (before semantic processing) enum PROT protection; // protection for the base interface ClassDeclaration *base; int offset; // 'this' pointer offset Array vtbl; // for interfaces: Array of FuncDeclaration's // making up the vtbl[] int baseInterfaces_dim; BaseClass *baseInterfaces; // if BaseClass is an interface, these // are a copy of the InterfaceDeclaration::interfaces BaseClass(); BaseClass(Type *type, enum PROT protection); int fillVtbl(ClassDeclaration *cd, Array *vtbl, int newinstance); void copyBaseInterfaces(BaseClasses *); }; #if DMDV2 #define CLASSINFO_SIZE (0x3C+16) // value of ClassInfo.size #else #define CLASSINFO_SIZE (0x3C+12) // value of ClassInfo.size #endif struct ClassDeclaration : AggregateDeclaration { static ClassDeclaration *object; static ClassDeclaration *classinfo; ClassDeclaration *baseClass; // NULL only if this is Object FuncDeclaration *staticCtor; FuncDeclaration *staticDtor; Array vtbl; // Array of FuncDeclaration's making up the vtbl[] Array vtblFinal; // More FuncDeclaration's that aren't in vtbl[] BaseClasses baseclasses; // Array of BaseClass's; first is super, // rest are Interface's int interfaces_dim; BaseClass **interfaces; // interfaces[interfaces_dim] for this class // (does not include baseClass) BaseClasses *vtblInterfaces; // array of base interfaces that have // their own vtbl[] ClassInfoDeclaration *vclassinfo; // the ClassInfo object for this ClassDeclaration int com; // !=0 if this is a COM class (meaning // it derives from IUnknown) int isauto; // !=0 if this is an auto class int isabstract; // !=0 if abstract class int isnested; // !=0 if is nested VarDeclaration *vthis; // 'this' parameter if this class is nested int inuse; // to prevent recursive attempts ClassDeclaration(Loc loc, Identifier *id, BaseClasses *baseclasses); Dsymbol *syntaxCopy(Dsymbol *s); void semantic(Scope *sc); void toCBuffer(OutBuffer *buf, HdrGenState *hgs); int isBaseOf2(ClassDeclaration *cd); #define OFFSET_RUNTIME 0x76543210 virtual int isBaseOf(ClassDeclaration *cd, int *poffset); Dsymbol *search(Loc, Identifier *ident, int flags); #if DMDV2 int isFuncHidden(FuncDeclaration *fd); #endif FuncDeclaration *findFunc(Identifier *ident, TypeFunction *tf); void interfaceSemantic(Scope *sc); int isNested(); int isCOMclass(); virtual int isCOMinterface(); #if DMDV2 virtual int isCPPinterface(); #endif int isAbstract(); virtual int vtblOffset(); const char *kind(); char *mangle(); void toDocBuffer(OutBuffer *buf); PROT getAccess(Dsymbol *smember); // determine access to smember void addLocalClass(ClassDeclarations *); // Back end void toObjFile(int multiobj); // compile to .obj file void toDebug(); unsigned baseVtblOffset(BaseClass *bc); Symbol *toSymbol(); Symbol *toVtblSymbol(); void toDt(dt_t **pdt); void toDt2(dt_t **pdt, ClassDeclaration *cd); Symbol *vtblsym; ClassDeclaration *isClassDeclaration() { return (ClassDeclaration *)this; } }; struct InterfaceDeclaration : ClassDeclaration { #if DMDV2 int cpp; // !=0 if this is a C++ interface #endif InterfaceDeclaration(Loc loc, Identifier *id, BaseClasses *baseclasses); Dsymbol *syntaxCopy(Dsymbol *s); void semantic(Scope *sc); int isBaseOf(ClassDeclaration *cd, int *poffset); int isBaseOf(BaseClass *bc, int *poffset); const char *kind(); int vtblOffset(); #if DMDV2 int isCPPinterface(); #endif virtual int isCOMinterface(); void toObjFile(int multiobj); // compile to .obj file Symbol *toSymbol(); InterfaceDeclaration *isInterfaceDeclaration() { return this; } }; #endif /* DMD_AGGREGATE_H */