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view dmd2/aliasthis.h @ 1499:df11cdec45a2
Another shot at fixing the issues with (constant) struct literals and their addresses. See DMD2682, #218, #324.
The idea is to separate the notion of const from 'this variable can always be
replaced with its initializer' in the frontend. To do that, I introduced
Declaration::isSameAsInitializer, which is overridden in VarDeclaration to
return false for constants that have a struct literal initializer.
So
{{{
const S s = S(5);
void foo() { auto ps = &s; }
// is no longer replaced by
void foo() { auto ps = &(S(5)); }
}}}
To make taking the address of a struct constant with a struct-initializer
outside of function scope possible, I made sure that AddrExp::optimize doesn't
try to run the argument's optimization with WANTinterpret - that'd again
replace the constant with a struct literal temporary.
author | Christian Kamm <kamm incasoftware de> |
---|---|
date | Sun, 14 Jun 2009 19:49:58 +0200 |
parents | 638d16625da2 |
children |
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// Compiler implementation of the D programming language // Copyright (c) 2009-2009 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_ALIASTHIS_H #define DMD_ALIASTHIS_H #ifdef __DMC__ #pragma once #endif /* __DMC__ */ #include "mars.h" #include "dsymbol.h" /**************************************************************/ #if DMDV2 struct AliasThis : Dsymbol { // alias Identifier this; Identifier *ident; AliasThis(Loc loc, Identifier *ident); Dsymbol *syntaxCopy(Dsymbol *); void semantic(Scope *sc); const char *kind(); void toCBuffer(OutBuffer *buf, HdrGenState *hgs); AliasThis *isAliasThis() { return this; } }; #endif #endif