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gc: more specific error for statements at top level

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R=ken2, r, ken3
CC=golang-dev
https://golang.org/cl/1006041
This commit is contained in:
Russ Cox 2010-04-26 22:35:27 -07:00
parent 2a591bdf8a
commit d6e4e18c8c
2 changed files with 40 additions and 10 deletions
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28
src/cmd/gc/go.y
View File

@ -53,7 +53,7 @@
%type <node> compound_stmt dotname embed expr
%type <node> expr_or_type
%type <node> fndcl fnliteral
%type <node> for_body for_header for_stmt if_header if_stmt
%type <node> for_body for_header for_stmt if_header if_stmt non_dcl_stmt
%type <node> interfacedcl keyval labelname name
%type <node> name_or_type non_expr_type
%type <node> new_name dcl_name oexpr typedclname
@ -271,6 +271,11 @@ xdcl:
{
$$ = list1($1);
}
| non_dcl_stmt
{
yyerror("non-declaration statement outside function body");
$$ = nil;
}
| error
{
$$ = nil;
@ -1086,10 +1091,12 @@ fndcl:
$$->nname->ntype = n;
funchdr($$);
}
| '(' oarg_type_list_ocomma ')' new_name '(' oarg_type_list_ocomma ')' fnres
| '(' oarg_type_list_ocomma ')' sym '(' oarg_type_list_ocomma ')' fnres
{
Node *rcvr, *t;
Node *name;
name = newname($4);
$2 = checkarglist($2, 0);
$6 = checkarglist($6, 1);
$$ = N;
@ -1108,12 +1115,12 @@ fndcl:
}
$$ = nod(ODCLFUNC, N, N);
$$->nname = methodname1($4, rcvr->right);
$$->nname = methodname1(name, rcvr->right);
t = nod(OTFUNC, rcvr, N);
t->list = $6;
t->rlist = $8;
$$->nname->ntype = t;
$$->shortname = $4;
$$->shortname = name;
funchdr($$);
}
@ -1340,12 +1347,19 @@ stmt:
{
$$ = N;
}
| simple_stmt
| compound_stmt
| common_dcl
{
$$ = liststmt($1);
}
| non_dcl_stmt
| error
{
$$ = N;
}
non_dcl_stmt:
simple_stmt
| for_stmt
| switch_stmt
| select_stmt
@ -1360,10 +1374,6 @@ stmt:
$$ = $1;
$$->nelse = list1($3);
}
| error
{
$$ = N;
}
| labelname ':' stmt
{
NodeList *l;

20
test/syntax/topexpr.go Normal file
View File

@ -0,0 +1,20 @@
// errchk $G -e $D/$F.go
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
fmt.Printf("hello") // ERROR "non-declaration statement outside function body"
func main() {
}
x++ // ERROR "non-declaration statement outside function body"
func init() {
}
x,y := 1, 2 // ERROR "non-declaration statement outside function body"