reject struct to interface conversion for now

R=ken OCL=21007 CL=21007

reject struct to interface conversion for now
R=ken OCL=21007 CL=21007
73653841 · Russ Cox · 9ba97ca3 · 73653841
Commit 73653841 authored Dec 11, 2008 by Russ Cox
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walk.c src/cmd/gc/walk.c +6 -1

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--- a/src/cmd/gc/walk.c
+++ b/src/cmd/gc/walk.c
@@ -2733,7 +2733,12 @@ isandss(Type *lt, Node *r)
 				return I2I;
 			return Inone;
 		}
-		if(isnilinter(lt) || ismethod(rt) != T)
+		if(isnilinter(lt)) {
+			if(!issimple[rt->etype] && !isptr[rt->etype])
+				yyerror("using %T as interface is unimplemented", rt);
+			return T2I;
+		}
+		if(ismethod(rt) != T)
 			return T2I;
 		return Inone;
 	}