mirror of
https://git.savannah.gnu.org/git/bison.git
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366eea36d3
printer_location are new members. (symbol_printer_set): New. * src/parse-gram.y (PERCENT_PRINTER): New token. Handle its associated rule. * src/scan-gram.l: Adjust. (handle_destructor_at, handle_destructor_dollar): Rename as... (handle_symbol_code_at, handle_symbol_code_dollar): these. * src/output.c (symbol_printers_output): New. (output_skeleton): Call it. * data/bison.simple (yysymprint): New. Cannot be named yyprint since there are already many grammar files with a user `yyprint'. Replace the calls to YYPRINT to calls to yysymprint. * tests/calc.at: Adjust. * tests/torture.at (AT_DATA_STACK_TORTURE): Remove YYPRINT: it was taking advantage of parser very internal details (stack size!).
473 lines
11 KiB
Plaintext
473 lines
11 KiB
Plaintext
# Checking the output filenames. -*- Autotest -*-
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# Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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AT_BANNER([[Simple Calculator.]])
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## ---------------------------------------------------- ##
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## Compile the grammar described in the documentation. ##
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## ---------------------------------------------------- ##
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# ------------------------- #
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# Helping Autotest macros. #
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# ------------------------- #
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# _AT_DATA_CALC_Y($1, $2, $3, [CPP-DIRECTIVES])
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# ---------------------------------------------
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# Produce `calc.y'. Don't call this macro directly, because it contains
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# some occurrences of `$1' etc. which will be interpreted by m4. So
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# you should call it with $1, $2, and $3 as arguments, which is what
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# AT_DATA_CALC_Y does.
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m4_define([_AT_DATA_CALC_Y],
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[m4_if([$1$2$3], $[1]$[2]$[3], [],
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[m4_fatal([$0: Invalid arguments: $@])])dnl
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AT_DATA([calc.y],
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[[/* Infix notation calculator--calc */
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%{
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#include <config.h>
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/* We don't need a perfect malloc for these tests. */
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#undef malloc
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#include <stdio.h>
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#if STDC_HEADERS
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# include <stdlib.h>
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# include <string.h>
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#else
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char *strcat(char *dest, const char *src);
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#endif
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#include <ctype.h>
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static int power (int base, int exponent);
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static void yyerror (const char *s);
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static int yylex (void);
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static int yygetc (void);
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static void yyungetc (int c);
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extern void perror (const char *s);
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/* Exercise pre-prologue dependency to %union. */
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typedef int value_t;
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%}
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/* Exercise M4 quoting: '@:>@@:>@', 0. */
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/* Also exercise %union. */
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%union
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{
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value_t ival; /* A comment to exercise an old bug. */
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};
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/* Exercise post-prologue dependency to %union. */
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%{
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static void id (YYSTYPE *lval);
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/* Exercise quotes in declarations. */
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char quote[] = "@:>@@:>@,";
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%}
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/* Bison Declarations */
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%token CALC_EOF 0 "end of file"
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%token <ival> NUM "number"
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%type <ival> exp
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/* Exercise quotes in strings. */
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%token FAKE "fake @>:@@>:@,"
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%nonassoc '=' /* comparison */
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%left '-' '+'
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%left '*' '/'
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%left NEG /* negation--unary minus */
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%right '^' /* exponentiation */
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]$4[
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/* Grammar follows */
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%%
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input:
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line
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| input line
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;
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line:
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'\n'
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| exp '\n'
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{
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/* Exercise quotes in braces. */
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char tmp[] = "@>:@@:>@,";
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}
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;
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/* Exercise M4 quoting: '@:>@@:>@', 1. */
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exp:
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NUM { $$ = $1; }
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| exp '=' exp
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{
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if ($1 != $3)
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fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
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$$ = $1 == $3;
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}
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| exp '+' exp { $$ = $1 + $3; }
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| exp '-' exp { $$ = $1 - $3; }
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| exp '*' exp { $$ = $1 * $3; }
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| exp '/' exp { $$ = $1 / $3; }
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| '-' exp %prec NEG { $$ = -$2; }
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| exp '^' exp { $$ = power ($1, $3); }
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| '(' exp ')' { $$ = $2; }
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| '(' error ')' { $$ = 0; }
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;
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%%
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/* The input. */
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FILE *yyin;
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/* Exercise M4 quoting: '@:>@@:>@', 2. */
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static void
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yyerror (const char *s)
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{
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#if YYLSP_NEEDED
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fprintf (stderr, "%d.%d-%d.%d: ",
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yylloc.first_line, yylloc.first_column,
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yylloc.last_line, yylloc.last_column);
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#endif
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fprintf (stderr, "%s\n", s);
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}
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#if YYLSP_NEEDED
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static YYLTYPE last_yylloc;
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#endif
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static int
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yygetc (void)
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{
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int res = getc (yyin);
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#if YYLSP_NEEDED
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last_yylloc = yylloc;
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if (res == '\n')
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{
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yylloc.last_line++;
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yylloc.last_column = 1;
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}
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else
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yylloc.last_column++;
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#endif
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return res;
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}
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static void
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yyungetc (int c)
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{
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#if YYLSP_NEEDED
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/* Wrong when C == `\n'. */
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yylloc = last_yylloc;
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#endif
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ungetc (c, yyin);
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}
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static int
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read_signed_integer (void)
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{
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int c = yygetc ();
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int sign = 1;
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int n = 0;
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if (c == '-')
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{
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c = yygetc ();
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sign = -1;
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}
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while (isdigit (c))
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{
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n = 10 * n + (c - '0');
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c = yygetc ();
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}
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yyungetc (c);
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return sign * n;
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}
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/*---------------------------------------------------------------.
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| Lexical analyzer returns an integer on the stack and the token |
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| NUM, or the ASCII character read if not a number. Skips all |
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| blanks and tabs, returns 0 for EOF. |
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`---------------------------------------------------------------*/
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static int
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yylex (void)
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{
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int c;
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#if YYLSP_NEEDED
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yylloc.first_column = yylloc.last_column;
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yylloc.first_line = yylloc.last_line;
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#endif
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/* Skip white space. */
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while ((c = yygetc ()) == ' ' || c == '\t')
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{
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#if YYLSP_NEEDED
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yylloc.first_column = yylloc.last_column;
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yylloc.first_line = yylloc.last_line;
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#endif
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}
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/* process numbers */
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if (c == '.' || isdigit (c))
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{
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yyungetc (c);
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yylval.ival = read_signed_integer ();
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return NUM;
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}
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/* Return end-of-file. */
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if (c == EOF)
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return CALC_EOF;
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/* Return single chars. */
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return c;
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}
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static int
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power (int base, int exponent)
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{
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int res = 1;
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if (exponent < 0)
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exit (1);
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for (/* Niente */; exponent; --exponent)
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res *= base;
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return res;
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}
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void
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id (YYSTYPE* lval)
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{
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}
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int
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main (int argc, const char **argv)
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{
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yyin = NULL;
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if (argc == 2)
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yyin = fopen (argv[1], "r");
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else
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yyin = stdin;
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if (!yyin)
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{
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perror (argv[1]);
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exit (1);
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}
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#if YYDEBUG
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yydebug = 1;
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#endif
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#if YYLSP_NEEDED
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yylloc.last_column = 1;
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yylloc.last_line = 1;
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#endif
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yyparse ();
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return 0;
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}
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]])
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])# _AT_DATA_CALC_Y
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# AT_DATA_CALC_Y([BISON-OPTIONS])
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# -------------------------------
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# Produce `calc.y'.
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m4_define([AT_DATA_CALC_Y],
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[_AT_DATA_CALC_Y($[1], $[2], $[3],
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[m4_bmatch([$1], [--yyerror-verbose],
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[[%error-verbose]])])])
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# _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES = 0])
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# ------------------------------------------------------------
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# Run `calc' on INPUT and expect no STDOUT nor STDERR.
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#
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# If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
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# of expected lines on stderr.
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m4_define([_AT_CHECK_CALC],
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[AT_DATA([[input]],
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[[$2
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]])
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AT_CHECK([./calc input], 0, [], [stderr])dnl
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AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0,
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[m4_bmatch([$1], [--debug],
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[$3], [0])
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])
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])
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# _AT_CHECK_CALC_ERROR(BISON-OPTIONS, INPUT, [NUM-DEBUG-LINES],
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# [ERROR-LOCATION], [IF-YYERROR-VERBOSE])
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# ------------------------------------------------------------
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# Run `calc' on INPUT, and expect a `parse error' message.
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#
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# If INPUT starts with a slash, it is used as absolute input file name,
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# otherwise as contents.
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#
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# If BISON-OPTIONS contains `--location', then make sure the ERROR-LOCATION
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# is correctly output on stderr.
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#
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# If BISON-OPTIONS contains `--yyerror-verbose', then make sure the
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# IF-YYERROR-VERBOSE message is properly output after `parse error, '
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# on STDERR.
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#
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# If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
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# of expected lines on stderr.
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m4_define([_AT_CHECK_CALC_ERROR],
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[m4_bmatch([$2], [^/],
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[AT_CHECK([./calc $2], 0, [], [stderr])],
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[AT_DATA([[input]],
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[[$2
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]])
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AT_CHECK([./calc input], 0, [], [stderr])])
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m4_bmatch([$1], [--debug],
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[AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0, [$3
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])])
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# Normalize the observed and expected error messages, depending upon the
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# options.
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# 1. Remove the traces from observed.
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sed '/^Starting/d
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/^Entering/d
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/^Reading/d
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/^Reducing/d
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/^Shifting/d
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/^state/d
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/^Error:/d
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/^Next/d
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/^Discarding/d
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/^yydestructor:/d' stderr >at-stderr
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mv at-stderr stderr
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# 2. Create the reference error message.
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AT_DATA([[expout]],
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[$4
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])
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# 3. If locations are not used, remove them.
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m4_bmatch([$1], [--location], [],
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[[sed 's/^[-0-9.]*: //' expout >at-expout
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mv at-expout expout]])
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# 4. If error-verbose is not used, strip the`, unexpected....' part.
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m4_bmatch([$1], [--yyerror-verbose], [],
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[[sed 's/parse error, .*$/parse error/' expout >at-expout
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mv at-expout expout]])
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# 5. Check
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AT_CHECK([cat stderr], 0, [expout])
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])
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# AT_CHECK_CALC([BISON-OPTIONS], [PARSER-EXPECTED-STDERR])
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# --------------------------------------------------------
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# Start a testing chunk which compiles `calc' grammar with
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# BISON-OPTIONS, and performs several tests over the parser.
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m4_define([AT_CHECK_CALC],
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[# We use integers to avoid dependencies upon the precision of doubles.
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AT_SETUP([Calculator $1])
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AT_DATA_CALC_Y([$1])
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# Specify the output files to avoid problems on different file systems.
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AT_CHECK([bison calc.y -o calc.c m4_bpatsubst([$1], [--yyerror-verbose])],
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[0], [], [])
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AT_CHECK([$CC $CFLAGS $CPPFLAGS calc.c -o calc], 0, [], [ignore])
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# Test the priorities.
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_AT_CHECK_CALC([$1],
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[1 + 2 * 3 = 7
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1 + 2 * -3 = -5
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-1^2 = -1
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(-1)^2 = 1
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---1 = -1
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1 - 2 - 3 = -4
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1 - (2 - 3) = 2
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2^2^3 = 256
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(2^2)^3 = 64], [486])
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# Some parse errors.
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_AT_CHECK_CALC_ERROR([$1], [0 0], [11],
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[1.3-1.4: parse error, unexpected "number"])
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_AT_CHECK_CALC_ERROR([$1], [1//2], [15],
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[1.3-1.4: parse error, unexpected '/', expecting "number" or '-' or '('])
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_AT_CHECK_CALC_ERROR([$1], [error], [4],
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[1.1-1.2: parse error, unexpected $undefined., expecting "number" or '-' or '\n' or '('])
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_AT_CHECK_CALC_ERROR([$1], [1 = 2 = 3], [22],
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[1.7-1.8: parse error, unexpected '='])
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_AT_CHECK_CALC_ERROR([$1],
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[
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+1],
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[14],
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[2.1-2.2: parse error, unexpected '+'])
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# Exercise error messages with EOF: work on an empty file.
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_AT_CHECK_CALC_ERROR([$1], [/dev/null], [4],
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[1.1-1.2: parse error, unexpected "end of file", expecting "number" or '-' or '\n' or '('])
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# Exercise the error token: without it, we die at the first error,
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# hence be sure i. to have several errors, ii. to test the action
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# associated to `error'.
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_AT_CHECK_CALC_ERROR([$1], [(1 ++ 2) + (0 0) = 1], [82],
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[1.5-1.6: parse error, unexpected '+', expecting "number" or '-' or '('
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1.15-1.16: parse error, unexpected "number"
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calc: error: 0 != 1])
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# Add a studid example demonstrating that Bison can further improve the
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# error message. FIXME: Fix this ridiculous message.
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_AT_CHECK_CALC_ERROR([$1], [()], [21],
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[1.2-1.3: parse error, unexpected ')', expecting error or "number" or '-' or '('])
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AT_CLEANUP
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])# AT_CHECK_CALC
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# ------------------ #
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# Test the parsers. #
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# ------------------ #
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AT_CHECK_CALC()
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AT_CHECK_CALC([--defines])
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AT_CHECK_CALC([--locations])
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AT_CHECK_CALC([--name-prefix=calc])
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AT_CHECK_CALC([--verbose])
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AT_CHECK_CALC([--yacc])
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AT_CHECK_CALC([--yyerror-verbose])
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AT_CHECK_CALC([--locations --yyerror-verbose])
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AT_CHECK_CALC([--defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])
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AT_CHECK_CALC([--debug])
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AT_CHECK_CALC([--debug --defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])
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