From 7cd173a4f893c3e86d34c95f78aa5d3758b14c89 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Wed, 15 Oct 2008 17:09:42 -0700
Subject: [PATCH] error about & at top level until it is safe

R=ken
OCL=17241
CL=17241
---
 src/cmd/gc/go.h | 2 ++
 src/cmd/gc/go.y | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/src/cmd/gc/go.h b/src/cmd/gc/go.h
index eb8806779e..92dc1260c9 100644
--- a/src/cmd/gc/go.h
+++ b/src/cmd/gc/go.h
@@ -468,6 +468,8 @@ EXTERN	int32	thunk;
 
 EXTERN	int	exporting;
 
+EXTERN	int	func;
+
 /*
  *	y.tab.c
  */
diff --git a/src/cmd/gc/go.y b/src/cmd/gc/go.y
index f08421b5d4..d36b74621c 100644
--- a/src/cmd/gc/go.y
+++ b/src/cmd/gc/go.y
@@ -754,6 +754,8 @@ uexpr:
 	}
 |	'&' uexpr
 	{
+		if($2->op == OCONV && !func)
+			yyerror("& of composite literal at top level");
 		$$ = nod(OADDR, $2, N);
 	}
 |	'+' uexpr
@@ -1179,11 +1181,13 @@ xfndcl:
 	{
 		maxarg = 0;
 		stksize = 0;
+		func++;
 	} fndcl fnbody
 	{
 		$$ = $3;
 		$$->nbody = $4;
 		funcbody($$);
+		func--;
 	}
 
 fndcl:
-- 
2.50.0