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cmd/gc: better error messages for C-style if statements.

Browse Source 
Given
        if (i == 0)
                x++
The old message was
        x.go:6: syntax error: unexpected semicolon or newline before {
Now we see
        x.go:6: syntax error: missing { after if clause

Fixes #5687

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/12822045
This commit is contained in:
Rob Pike 2013-08-19 11:49:59 +10:00
parent bc6bb3efb4
commit d00bd1d1f4
4 changed files with 662 additions and 1266 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/cmd/gc/go.errors
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@ -21,16 +21,16 @@ static struct {
"missing import path; require quoted string",
% loadsys package imports LFUNC LNAME '(' ')' '{' LIF if_header ';'
"unexpected semicolon or newline before {",
"missing { after if clause",
% loadsys package imports LFUNC LNAME '(' ')' '{' LSWITCH if_header ';'
"unexpected semicolon or newline before {",
"missing { after switch clause",
% loadsys package imports LFUNC LNAME '(' ')' '{' LFOR for_header ';'
"unexpected semicolon or newline before {",
"missing { after for clause",
% loadsys package imports LFUNC LNAME '(' ')' '{' LFOR ';' LBODY
"unexpected semicolon or newline before {",
"missing { after for clause",
% loadsys package imports LFUNC LNAME '(' ')' ';' '{'
"unexpected semicolon or newline before {",

1866
src/cmd/gc/y.tab.c
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File diff suppressed because it is too large Load Diff

46
src/cmd/gc/y.tab.h
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@ -1,21 +1,24 @@
/* A Bison parser, made by GNU Bison 2.5. */
/* A Bison parser, made by GNU Bison 2.3. */
/* Bison interface for Yacc-like parsers in C
Copyright (C) 1984, 1989-1990, 2000-2011 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
/* Skeleton interface for Bison's Yacc-like parsers in C
Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
/* As a special exception, you may create a larger work that contains
part or all of the Bison parser skeleton and distribute that work
@ -26,11 +29,10 @@
special exception, which will cause the skeleton and the resulting
Bison output files to be licensed under the GNU General Public
License without this special exception.
This special exception was added by the Free Software Foundation in
version 2.2 of Bison. */
/* Tokens. */
#ifndef YYTOKENTYPE
# define YYTOKENTYPE
@ -144,28 +146,22 @@
#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
typedef union YYSTYPE
{
/* Line 2068 of yacc.c */
#line 30 "go.y"
{
Node* node;
NodeList* list;
Type* type;
Sym* sym;
struct Val val;
int i;
/* Line 2068 of yacc.c */
#line 163 "y.tab.h"
} YYSTYPE;
# define YYSTYPE_IS_TRIVIAL 1
}
/* Line 1529 of yacc.c. */
#line 160 "y.tab.h"
YYSTYPE;
# define yystype YYSTYPE /* obsolescent; will be withdrawn */
# define YYSTYPE_IS_DECLARED 1
# define YYSTYPE_IS_TRIVIAL 1
#endif
extern YYSTYPE yylval;

8
src/cmd/gc/yerr.h
View File

@ -21,16 +21,16 @@ static struct {
"missing import path; require quoted string",
377, ';',
"unexpected semicolon or newline before {",
"missing { after if clause",
398, ';',
"unexpected semicolon or newline before {",
"missing { after switch clause",
237, ';',
"unexpected semicolon or newline before {",
"missing { after for clause",
475, LBODY,
"unexpected semicolon or newline before {",
"missing { after for clause",
22, '{',
"unexpected semicolon or newline before {",