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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 e961851fb8be
children def7a1d494fd
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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_ENUM_H
#define DMD_ENUM_H

#ifdef __DMC__
#pragma once
#endif /* __DMC__ */

#include "root.h"
#include "dsymbol.h"

struct Identifier;
struct Type;
struct Expression;
#ifdef _DH
struct HdrGenState;
#endif


struct EnumDeclaration : ScopeDsymbol
{
    Type *type;			// the TypeEnum
    Type *memtype;		// type of the members

#if DMDV1
    dinteger_t maxval;
    dinteger_t minval;
    dinteger_t defaultval;	// default initializer
#else
    Expression *maxval;
    Expression *minval;
    Expression *defaultval;	// default initializer

    Scope *scope;		// !=NULL means context to use
#endif
    int isdeprecated;

    EnumDeclaration(Loc loc, Identifier *id, Type *memtype);
    Dsymbol *syntaxCopy(Dsymbol *s);
    void semantic(Scope *sc);
    int oneMember(Dsymbol **ps);
    void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
    Type *getType();
    const char *kind();
#if DMDV2
    Dsymbol *search(Loc, Identifier *ident, int flags);
#endif
    int isDeprecated();			// is Dsymbol deprecated?

    void emitComment(Scope *sc);
    void toDocBuffer(OutBuffer *buf);

    EnumDeclaration *isEnumDeclaration() { return this; }

#if IN_DMD
    void toObjFile(int multiobj);			// compile to .obj file
    void toDebug();
    int cvMember(unsigned char *p);

    Symbol *sinit;
    Symbol *toInitializer();
#endif

#if IN_LLVM
    void codegen(Ir*);
#endif
};


struct EnumMember : Dsymbol
{
    Expression *value;

    EnumMember(Loc loc, Identifier *id, Expression *value);
    Dsymbol *syntaxCopy(Dsymbol *s);
    void toCBuffer(OutBuffer *buf, HdrGenState *hgs);
    const char *kind();

    void emitComment(Scope *sc);
    void toDocBuffer(OutBuffer *buf);

    EnumMember *isEnumMember() { return this; }
};

#endif /* DMD_ENUM_H */