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80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
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// Compiler implementation of the D programming language
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// Copyright (c) 2009-2009 by Digital Mars
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// All Rights Reserved
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// written by Walter Bright
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// http://www.digitalmars.com
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// License for redistribution is by either the Artistic License
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// in artistic.txt, or the GNU General Public License in gnu.txt.
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// See the included readme.txt for details.
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#include <stdio.h>
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#include <assert.h>
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#include "mars.h"
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#include "identifier.h"
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#include "aliasthis.h"
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#include "scope.h"
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#include "aggregate.h"
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#include "dsymbol.h"
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#if DMDV2
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AliasThis::AliasThis(Loc loc, Identifier *ident)
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: Dsymbol(NULL) // it's anonymous (no identifier)
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{
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this->loc = loc;
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this->ident = ident;
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}
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Dsymbol *AliasThis::syntaxCopy(Dsymbol *s)
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{
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assert(!s);
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/* Since there is no semantic information stored here,
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* we don't need to copy it.
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*/
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return this;
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}
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void AliasThis::semantic(Scope *sc)
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{
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Dsymbol *parent = sc->parent;
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if (parent)
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parent = parent->pastMixin();
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AggregateDeclaration *ad = NULL;
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if (parent)
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ad = parent->isAggregateDeclaration();
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if (ad)
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{
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assert(ad->members);
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Dsymbol *s = ad->search(loc, ident, 0);
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if (!s)
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{ s = sc->search(loc, ident, 0);
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if (s)
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::error(loc, "%s is not a member of %s", s->toChars(), ad->toChars());
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else
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::error(loc, "undefined identifier %s", ident->toChars());
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}
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else if (ad->aliasthis && s != ad->aliasthis)
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error("there can be only one alias this");
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ad->aliasthis = s;
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}
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else
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error("alias this can only appear in struct or class declaration, not %s", parent ? parent->toChars() : "nowhere");
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}
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const char *AliasThis::kind()
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{
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return "alias this";
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}
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void AliasThis::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
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{
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buf->writestring("alias ");
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buf->writestring(ident->toChars());
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buf->writestring(" this;\n");
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}
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#endif
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