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bison/tests/regression.at
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Akim Demaille b365aa0589 * tests/regression.at (Unresolved SR Conflicts): 
(Solved SR Conflicts, Rule Line Numbers): Adjust to the changes
below.
* src/LR0.c (new_state): Recognize the final state by the fact it
is reached by eoftoken.
(insert_start_shifting_state, insert_eof_shifting_state)
(insert_accepting_state, augment_automaton): Remove, since now
these states are automatically computed from the initial state.
(generate_states): Adjust.
* src/print.c: When reporting a rule number to the user, substract
1, so that the axiom rule is rule 0, and the first user rule is 1.
* src/reduce.c: Likewise.
* src/print_graph.c (print_core): For the time being, just as for
the report, depend upon --trace-flags to dump the full set of
items.
* src/reader.c (readgram): Once the grammar read, insert the rule
0: `$axiom: START-SYMBOL $'.
* tests/set.at: Adjust: rule 0 is now displayed, and since the
number of the states has changed (the final state is no longer
necessarily the last), catch up.
* tests/regression.at: Partly catch up.
2001-12-27 18:13:59 +00:00

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# Bison Regressions. -*- Autotest -*-
# Copyright 2001 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 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
AT_BANNER([[Regression tests.]])
## ------------------ ##
## Duplicate string. ##
## ------------------ ##
AT_SETUP([Duplicate string])
AT_DATA([input.y],
[[/* `Bison -v' used to dump core when two tokens are defined with the same
string, as LE and GE below. */
%token NUM
%token LE "<="
%token GE "<="
%%
exp: '(' exp ')' | NUM ;
%%
]])
AT_CHECK([bison -v input.y -o input.c], 0, ignore, ignore)
AT_CLEANUP
## ------------------------- ##
## Unresolved SR Conflicts. ##
## ------------------------- ##
AT_SETUP([Unresolved SR Conflicts])
AT_DATA([input.y],
[[%token NUM OP
%%
exp: exp OP exp | NUM;
]])
AT_CHECK([bison input.y -o input.c -v], 0, [],
[input.y contains 1 shift/reduce conflict.
])
# Check the contents of the report.
AT_CHECK([cat input.output], [],
[[State 5 contains 1 shift/reduce conflict.
Grammar
Number, Line, Rule
0 4 $axiom -> exp $
1 3 exp -> exp OP exp
2 3 exp -> NUM
Terminals, with rules where they appear
$ (0) 0
error (256)
NUM (257) 2
OP (258) 1
Nonterminals, with rules where they appear
$axiom (5)
on left: 0
exp (6)
on left: 1 2, on right: 0 1
state 0
NUM shift, and go to state 1
exp go to state 2
state 1
exp -> NUM . (rule 2)
$default reduce using rule 2 (exp)
state 2
$axiom -> exp . $ (rule 0)
exp -> exp . OP exp (rule 1)
$ shift, and go to state 3
OP shift, and go to state 4
state 3
$axiom -> exp $ . (rule 0)
$default accept
state 4
exp -> exp OP . exp (rule 1)
NUM shift, and go to state 1
exp go to state 5
state 5
exp -> exp . OP exp (rule 1)
exp -> exp OP exp . (rule 1)
OP shift, and go to state 4
OP [reduce using rule 1 (exp)]
$default reduce using rule 1 (exp)
]])
AT_CLEANUP
## --------------------- ##
## Solved SR Conflicts. ##
## --------------------- ##
AT_SETUP([Solved SR Conflicts])
AT_DATA([input.y],
[[%token NUM OP
%right OP
%%
exp: exp OP exp | NUM;
]])
AT_CHECK([bison input.y -o input.c -v], 0, [], [])
# Check the contents of the report.
AT_CHECK([cat input.output], [],
[[Conflict in state 5 between rule 2 and token OP resolved as shift.
Grammar
Number, Line, Rule
0 5 $axiom -> exp $
1 4 exp -> exp OP exp
2 4 exp -> NUM
Terminals, with rules where they appear
$ (0) 0
error (256)
NUM (257) 2
OP (258) 1
Nonterminals, with rules where they appear
$axiom (5)
on left: 0
exp (6)
on left: 1 2, on right: 0 1
state 0
NUM shift, and go to state 1
exp go to state 2
state 1
exp -> NUM . (rule 2)
$default reduce using rule 2 (exp)
state 2
$axiom -> exp . $ (rule 0)
exp -> exp . OP exp (rule 1)
$ shift, and go to state 3
OP shift, and go to state 4
state 3
$axiom -> exp $ . (rule 0)
$default accept
state 4
exp -> exp OP . exp (rule 1)
NUM shift, and go to state 1
exp go to state 5
state 5
exp -> exp . OP exp (rule 1)
exp -> exp OP exp . (rule 1)
OP shift, and go to state 4
$default reduce using rule 1 (exp)
]])
AT_CLEANUP
## ------------------- ##
## Rule Line Numbers. ##
## ------------------- ##
AT_SETUP([Rule Line Numbers])
AT_DATA([input.y],
[[%%
expr:
'a'
{
}
'b'
{
}
|
{
}
'c'
{
}
]])
AT_CHECK([bison input.y -o input.c -v], 0, [], [])
# Check the contents of the report.
AT_CHECK([cat input.output], [],
[[Grammar
Number, Line, Rule
0 28 $axiom -> expr $
1 2 @1 -> /* empty */
2 2 expr -> 'a' @1 'b'
3 15 @2 -> /* empty */
4 15 expr -> @2 'c'
Terminals, with rules where they appear
$ (0) 0
'a' (97) 2
'b' (98) 2
'c' (99) 4
error (256)
Nonterminals, with rules where they appear
$axiom (6)
on left: 0
expr (7)
on left: 2 4, on right: 0
@1 (8)
on left: 1, on right: 2
@2 (9)
on left: 3, on right: 4
state 0
'a' shift, and go to state 1
expr go to state 2
@2 go to state 3
state 1
expr -> 'a' . @1 'b' (rule 2)
$default reduce using rule 1 (@1)
@1 go to state 4
state 2
$axiom -> expr . $ (rule 0)
$ shift, and go to state 5
state 3
expr -> @2 . 'c' (rule 4)
'c' shift, and go to state 6
state 4
expr -> 'a' @1 . 'b' (rule 2)
'b' shift, and go to state 7
state 5
$axiom -> expr $ . (rule 0)
$default accept
state 6
expr -> @2 'c' . (rule 4)
$default reduce using rule 4 (expr)
state 7
expr -> 'a' @1 'b' . (rule 2)
$default reduce using rule 2 (expr)
]])
AT_CLEANUP
## -------------------- ##
## %expect not enough. ##
## -------------------- ##
AT_SETUP([%expect not enough])
AT_DATA([input.y],
[[%token NUM OP
%expect 0
%%
exp: exp OP exp | NUM;
]])
AT_CHECK([bison input.y -o input.c], 1, [],
[input.y contains 1 shift/reduce conflict.
expected 0 shift/reduce conflicts
])
AT_CLEANUP
## --------------- ##
## %expect right. ##
## --------------- ##
AT_SETUP([%expect right])
AT_DATA([input.y],
[[%token NUM OP
%expect 1
%%
exp: exp OP exp | NUM;
]])
AT_CHECK([bison input.y -o input.c], 0)
AT_CLEANUP
## ------------------ ##
## %expect too much. ##
## ------------------ ##
AT_SETUP([%expect too much])
AT_DATA([input.y],
[[%token NUM OP
%expect 2
%%
exp: exp OP exp | NUM;
]])
AT_CHECK([bison input.y -o input.c], 1, [],
[input.y contains 1 shift/reduce conflict.
expected 2 shift/reduce conflicts
])
AT_CLEANUP
## ---------------------- ##
## Mixing %token styles. ##
## ---------------------- ##
AT_SETUP([Mixing %token styles])
# Taken from the documentation.
AT_DATA([input.y],
[[%token <operator> OR "||"
%token <operator> LE 134 "<="
%left OR "<="
%%
exp: ;
%%
]])
AT_CHECK([bison -v input.y -o input.c], 0, ignore, ignore)
AT_CLEANUP
## ---------------------- ##
## %union and --defines. ##
## ---------------------- ##
AT_SETUP([%union and --defines])
AT_DATA([input.y],
[%union
{
int integer;
char *string ;
}
%%
exp: {};
])
AT_CHECK([bison --defines input.y])
AT_CLEANUP
## --------------------------------------- ##
## Duplicate '/' in C comments in %union ##
## --------------------------------------- ##
AT_SETUP([%union and C comments])
AT_DATA([input.y],
[%union
{
/* The int. */ int integer;
/* The string. */ char *string ;
}
%%
exp: {};
])
AT_CHECK([bison input.y -o input.c])
AT_CHECK([fgrep '//*' input.c], [1], [])
AT_CLEANUP
## ----------------- ##
## Invalid input 1. ##
## ----------------- ##
AT_SETUP([Invalid input: 1])
AT_DATA([input.y],
[[%%
?
]])
AT_CHECK([bison input.y], [1], [],
[[input.y:2: invalid input: `?'
input.y:3: fatal error: no rules in the input grammar
]])
AT_CLEANUP
## ----------------- ##
## Invalid input 2. ##
## ----------------- ##
AT_SETUP([Invalid input: 2])
AT_DATA([input.y],
[[%%
default: 'a' }
]])
AT_CHECK([bison input.y], [1], [],
[[input.y:2: invalid input: `}'
]])
AT_CLEANUP
## -------------------- ##
## Invalid %directive. ##
## -------------------- ##
AT_SETUP([Invalid %directive])
AT_DATA([input.y],
[[%invalid
]])
AT_CHECK([bison input.y], [1], [],
[[input.y:1: unrecognized: %invalid
input.y:1: Skipping to next %
input.y:2: fatal error: no input grammar
]])
AT_CLEANUP
## --------------------- ##
## Invalid CPP headers. ##
## --------------------- ##
# AT_TEST_CPP_GUARD_H([INPUT-FILE-BASE)
# -------------------------------------
m4_define([AT_TEST_CPP_GUARD_H],
[AT_SETUP([Invalid CPP guards: $1])
# Possibly create inner directories.
dirname=`AS_DIRNAME([$1])`
AS_MKDIR_P([$dirname])
AT_DATA([$1.y],
[%%
dummy:
])
AT_CHECK([bison --defines=$1.h $1.y])
# CPP should be happy with it.
AT_CHECK([$CC -E $1.h], 0, [ignore])
AT_CLEANUP
])
AT_TEST_CPP_GUARD_H([input/input])
AT_TEST_CPP_GUARD_H([9foo])
## -------------- ##
## Web2c Report. ##
## -------------- ##
# The generation of the reduction was once wrong in Bison, and made it
# miss some reductions. In the following test case, the reduction on
# `undef_id_tok' in state 1 was missing. This is stripped down from
# the actual web2c.y.
AT_SETUP([Web2c Report])
AT_DATA([input.y],
[[%token undef_id_tok const_id_tok
%start CONST_DEC_PART
%%
CONST_DEC_PART:
CONST_DEC_LIST
;
CONST_DEC_LIST:
CONST_DEC
| CONST_DEC_LIST CONST_DEC
;
CONST_DEC:
{ } undef_id_tok '=' const_id_tok ';'
;
%%
]])
AT_CHECK([bison -v input.y])
AT_CHECK([sed -n 's/ *$//;/^$/!p' input.output], 0,
[[Grammar
Number, Line, Rule
1 6 CONST_DEC_PART -> CONST_DEC_LIST
2 10 CONST_DEC_LIST -> CONST_DEC
3 12 CONST_DEC_LIST -> CONST_DEC_LIST CONST_DEC
4 15 @1 -> /* empty */
5 15 CONST_DEC -> @1 undef_id_tok '=' const_id_tok ';'
Terminals, with rules where they appear
$ (0)
';' (59) 5
'=' (61) 5
error (256)
undef_id_tok (257) 5
const_id_tok (258) 5
Nonterminals, with rules where they appear
CONST_DEC_PART (7)
on left: 1
CONST_DEC_LIST (8)
on left: 2 3, on right: 1 3
CONST_DEC (9)
on left: 5, on right: 2 3
@1 (10)
on left: 4, on right: 5
state 0
$default reduce using rule 4 (@1)
CONST_DEC_PART go to state 9
CONST_DEC_LIST go to state 1
CONST_DEC go to state 2
@1 go to state 3
state 1
CONST_DEC_PART -> CONST_DEC_LIST . (rule 1)
CONST_DEC_LIST -> CONST_DEC_LIST . CONST_DEC (rule 3)
undef_id_tok reduce using rule 4 (@1)
$default reduce using rule 1 (CONST_DEC_PART)
CONST_DEC go to state 4
@1 go to state 3
state 2
CONST_DEC_LIST -> CONST_DEC . (rule 2)
$default reduce using rule 2 (CONST_DEC_LIST)
state 3
CONST_DEC -> @1 . undef_id_tok '=' const_id_tok ';' (rule 5)
undef_id_tok shift, and go to state 5
state 4
CONST_DEC_LIST -> CONST_DEC_LIST CONST_DEC . (rule 3)
$default reduce using rule 3 (CONST_DEC_LIST)
state 5
CONST_DEC -> @1 undef_id_tok . '=' const_id_tok ';' (rule 5)
'=' shift, and go to state 6
state 6
CONST_DEC -> @1 undef_id_tok '=' . const_id_tok ';' (rule 5)
const_id_tok shift, and go to state 7
state 7
CONST_DEC -> @1 undef_id_tok '=' const_id_tok . ';' (rule 5)
';' shift, and go to state 8
state 8
CONST_DEC -> @1 undef_id_tok '=' const_id_tok ';' . (rule 5)
$default reduce using rule 5 (CONST_DEC)
state 9
$ shift, and go to state 10
state 10
$default accept
]])
AT_CLEANUP
## --------------- ##
## Web2c Actions. ##
## --------------- ##
# The generation of the mapping `state -> action' was once wrong in
# extremely specific situations. web2c.y exhibits this situation.
# Below is a stripped version of the grammar. It looks like one can
# simplify it further, but just don't: it is tuned to exhibit a bug,
# which disapears when applying sane grammar transformations.
#
# It used to be wrong on yydefact only:
#
# static const short yydefact[] =
# {
# - 2, 0, 1, 0, 0, 2, 3, 2, 5, 4,
# + 2, 0, 1, 0, 0, 0, 3, 2, 5, 4,
# 0, 0
# };
#
# but let's check all the tables.
AT_SETUP([Web2c Actions])
AT_DATA([input.y],
[[%%
statement: struct_stat;
struct_stat: /* empty. */ | if else;
if: "if" "const" "then" statement;
else: "else" statement;
%%
]])
AT_CHECK([bison -v input.y -o input.c])
# Check only the tables. We don't use --no-parser, because it is
# still to be implemented in the experimental branch of Bison.
AT_CHECK([[sed -n 's/ *$//;/^static const.*\[\] =/,/^}/p' input.c]], 0,
[[static const char yytranslate[] =
{
0, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 1, 3, 4, 5,
6
};
static const short yyprhs[] =
{
0, 0, 2, 3, 6, 11
};
static const short yyrhs[] =
{
8, 0, 0, 9, 10, 0, 3, 4, 5, 7,
0, 6, 7, 0
};
static const short yyrline[] =
{
0, 2, 3, 3, 4, 5
};
static const char *const yytname[] =
{
"$", "error", "$undefined.", "\"if\"", "\"const\"", "\"then\"",
"\"else\"", "statement", "struct_stat", "if", "else", NULL
};
static const short yytoknum[] =
{
0, 256, 2, 257, 258, 259, 260, -1
};
static const short yyr1[] =
{
0, 7, 8, 8, 9, 10
};
static const short yyr2[] =
{
0, 1, 0, 2, 4, 2
};
static const short yydefact[] =
{
2, 0, 1, 0, 0, 2, 3, 2, 5, 4,
0, 0
};
static const short yydefgoto[] =
{
8, 2, 3, 6
};
static const short yypact[] =
{
-2, -1,-32768, -4, 1, -2,-32768, -2,-32768,-32768,
4,-32768
};
static const short yypgoto[] =
{
0,-32768,-32768,-32768
};
static const short yytable[] =
{
10, 1, 5, 4, 11, 0, 7, 9
};
static const short yycheck[] =
{
0, 3, 6, 4, 0, -1, 5, 7
};
]])
AT_CLEANUP
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