4015 – forward reference in alias causes error

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Issue 4015 - forward reference in alias causes error

Summary: forward reference in alias causes error

Status:	RESOLVED FIXED
Alias:	None
Product:	D
Classification:	Unclassified
Component:	dmd (show other issues)
Version:	D2
Hardware:	Other Windows
Importance :	P2 normal
Assignee:	No Owner
URL:
Keywords:	patch, rejects-valid
Depends on:
Blocks:

See Also:
Reported:	2010年03月27日 05:32 UTC by Rainer Schuetze
Modified:	2014年02月15日 02:44 UTC (History)
CC List:	1 user (show)

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Description Rainer Schuetze 2010年03月27日 05:32:57 UTC

The code
alias A B;
const int A = 1;
causes error
test.d(1): Error: alias test.B forward reference of A
This is caused by dmd not trusting it's forward reference capabilities and issuing the error without even trying:
Index: declaration.c
===================================================================
--- declaration.c	(revision 421)
+++ declaration.c	(working copy)
@@ -500,7 +500,7 @@
 //printf("alias is a symbol %s %s\n", s->kind(), s->toChars());
 type = NULL;
 VarDeclaration *v = s->isVarDeclaration();
- if (v && v->linkage == LINKdefault)
+ if (0)
 {
 	error("forward reference of %s", v->toChars());
 	s = NULL;
(I thought this would be a duplicate, but the patch does not apply to any other bug i've tried).

Comment 1 Walter Bright 2010年05月10日 16:10:25 UTC

changelog 482