--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dmd2/aliasthis.c	Sat May 30 17:23:32 2009 +0100
@@ -0,0 +1,72 @@
+
+// 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.
+
+#include <stdio.h>
+#include <assert.h>
+
+#include "mars.h"
+#include "identifier.h"
+#include "aliasthis.h"
+#include "scope.h"
+#include "aggregate.h"
+#include "dsymbol.h"
+
+#if DMDV2
+
+
+AliasThis::AliasThis(Loc loc, Identifier *ident)
+    : Dsymbol(NULL)		// it's anonymous (no identifier)
+{
+    this->loc = loc;
+    this->ident = ident;
+}
+
+Dsymbol *AliasThis::syntaxCopy(Dsymbol *s)
+{
+    assert(!s);
+    /* Since there is no semantic information stored here,
+     * we don't need to copy it.
+     */
+    return this;
+}
+
+void AliasThis::semantic(Scope *sc)
+{
+    Dsymbol *parent = sc->parent;
+    if (parent)
+	parent = parent->pastMixin();
+    AggregateDeclaration *ad = NULL;
+    if (parent)
+	ad = parent->isAggregateDeclaration();
+    if (ad)
+    {
+	if (ad->aliasthis)
+	    error("there can be only one alias this");
+	assert(ad->members);
+	Dsymbol *s = ad->search(loc, ident, 0);
+	ad->aliasthis = s;
+    }
+    else
+	error("alias this can only appear in struct or class declaration, not %s", parent ? parent->toChars() : "nowhere");
+}
+
+const char *AliasThis::kind()
+{
+    return "alias this";
+}
+
+void AliasThis::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
+{
+    buf->writestring("alias ");
+    buf->writestring(ident->toChars());
+    buf->writestring(" this;\n");
+}
+
+#endif