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|
# Checking diagnostics. -*- Autotest -*-
# Copyright (C) 2019-2022 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.
#
# 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 <https://www.gnu.org/licenses/>.
AT_BANNER([[Diagnostics.]])
# AT_TEST($1: TITLE, $2: GRAMMAR, $3: EXIT-STATUS, $4: OUTPUT-WITH-STYLE,
# $5: EXTRA_ENV, $6: SKIP-IF)
# -----------------------------------------------------------------------
# Run Bison on GRAMMAR with debugging style enabled, and expect
# OUTPUT-WITH-STYLE as diagnostics.
m4_pushdef([AT_TEST],
[
AT_SETUP([$1])
AT_KEYWORDS([diagnostics])
m4_if(m4_index([$1], [Counterexample]), [-1], [], [AT_KEYWORDS([cex])])
# We need UTF-8 support for correct screen-width computation of UTF-8
# characters. Skip the test if not available.
locale=`locale -a | $EGREP '^en_US\.(UTF-8|utf8)$' | sed 1q`
AT_SKIP_IF([[test x = x"$locale"]])
m4_ifval([$6],
[AT_SKIP_IF([$6])])
AT_BISON_OPTION_PUSHDEFS
AT_DATA_GRAMMAR([[input.y]], [$2])
AT_DATA([experr], [$4])
# For some reason, literal ^M in the input are removed and don't end
# in `input.y`. So use the two-character ^M represent it, and let
# Perl insert real CR characters.
if $EGREP ['\^M|\\[0-9][0-9][0-9]'] input.y experr >/dev/null; then
AT_PERL_REQUIRE([-pi -e 's{\^M}{\r}g;s{\\(\d{3}|.)}{$v = $[]1; $v =~ /\A\d+\z/ ? chr($v) : $v}ge' input.y experr])
fi
AT_CHECK(AT_SET_ENV [LC_ALL="$locale" $5 bison -fcaret --color=debug -Wall,cex input.y], [$3], [], [experr])
# When no style, same messages, but without style.
# Except for the second display of the counterexample,
# which is not displayed at all.
AT_PERL_REQUIRE([-pi -e '
s{(</?(-|\w)+>)}{ $[]1 eq "<tag>" ? $[]1 : "" }ge;
if (/Example/)
{
++$example;
$_ = "" if $example % 2 == 0;
}
' experr])
# Cannot use AT_BISON_CHECK easily as we need to change the
# environment.
# FIXME: Enhance AT_BISON_CHECK.
AT_CHECK(AT_SET_ENV [LC_ALL="$locale" $5 bison -fcaret -Wall,cex input.y], [$3], [], [experr])
AT_BISON_OPTION_POPDEFS
AT_CLEANUP
])
## ---------- ##
## Warnings. ##
## ---------- ##
AT_TEST([[Warnings]],
[[%token FOO FOO FOO
%token FOO FOO FOO
%%
exp: %empty;
]],
[0],
[[input.y:9.12-14: <warning>warning:</warning> symbol FOO redeclared [<warning>-Wother</warning>]
9 | %token FOO <warning>FOO</warning> FOO
| <warning>^~~</warning>
input.y:9.8-10: <note>note:</note> previous declaration
9 | %token <note>FOO</note> FOO FOO
| <note>^~~</note>
input.y:9.16-18: <warning>warning:</warning> symbol FOO redeclared [<warning>-Wother</warning>]
9 | %token FOO FOO <warning>FOO</warning>
| <warning>^~~</warning>
input.y:9.8-10: <note>note:</note> previous declaration
9 | %token <note>FOO</note> FOO FOO
| <note>^~~</note>
input.y:10.8-10: <warning>warning:</warning> symbol FOO redeclared [<warning>-Wother</warning>]
10 | %token <warning>FOO</warning> FOO FOO
| <warning>^~~</warning>
input.y:9.8-10: <note>note:</note> previous declaration
9 | %token <note>FOO</note> FOO FOO
| <note>^~~</note>
input.y:10.13-15: <warning>warning:</warning> symbol FOO redeclared [<warning>-Wother</warning>]
10 | %token FOO <warning>FOO</warning> FOO
| <warning>^~~</warning>
input.y:9.8-10: <note>note:</note> previous declaration
9 | %token <note>FOO</note> FOO FOO
| <note>^~~</note>
input.y:10.18-20: <warning>warning:</warning> symbol FOO redeclared [<warning>-Wother</warning>]
10 | %token FOO FOO <warning>FOO</warning>
| <warning>^~~</warning>
input.y:9.8-10: <note>note:</note> previous declaration
9 | %token <note>FOO</note> FOO FOO
| <note>^~~</note>
]])
## ------------------------ ##
## Single point locations. ##
## ------------------------ ##
# Single point locations (equal boundaries) are troublesome: it's easy
# to mess up the opening/closing of style. They come from the parser,
# rules with empty rhs. Their position is therefore debatable
# (between the previous token and the next one).
AT_TEST([[Single point locations]],
[[%%
exp: a b c d e
a: {}
b:{
};
c:
d
:
e:
]],
[0],
[[input.y:11.4-5: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
11 | a: <warning>{}</warning>
| <warning>^~</warning>
| <fixit-insert>%empty</fixit-insert>
input.y:12.3-13.1: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
12 | b:<warning>{</warning>
| <warning>^</warning>
| <fixit-insert>%empty</fixit-insert>
input.y:14.3: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
14 | c:
| <warning>^</warning>
| <fixit-insert>%empty</fixit-insert>
input.y:16.2: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
16 | :
| <warning>^</warning>
| <fixit-insert>%empty</fixit-insert>
input.y:17.3: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
17 | e:
| <warning>^</warning>
| <fixit-insert>%empty</fixit-insert>
input.y: <warning>warning:</warning> fix-its can be applied. Rerun with option '--update'. [<warning>-Wother</warning>]
]])
## ------------------------------------- ##
## Line is too short, and then you die. ##
## ------------------------------------- ##
# We trust the "#line", since that's what allows us to quote the
# actual source from which the grammar file was generated. But #line
# can also be wrong, and point to a line which is shorter that the bad
# one. In which case we can easily forget to close the styling.
#
# Be sure to have #line point to a line long enough to open the
# styling, but not enough to close it.
AT_TEST([[Line is too short, and then you die]],
[[// Beware that there are 9 lines inserted before (including this one).
#line 12
%token foo 123
%token foo 123123
%token foo 123
%%
exp:
]],
[1],
[[input.y:13.8-10: <warning>warning:</warning> symbol foo redeclared [<warning>-Wother</warning>]
13 | %token <warning>foo</warning> 123
| <warning>^~~</warning>
input.y:12.8-10: <note>note:</note> previous declaration
12 | %token <note>foo</note> 123123
| <note>^~~</note>
input.y:13.12-17: <error>error:</error> redefining code of token foo
13 | %token foo <error>123</error>
| <error>^~~~~~</error>
input.y:14.8-10: <warning>warning:</warning> symbol foo redeclared [<warning>-Wother</warning>]
14 | %%
| <warning>^~~</warning>
input.y:12.8-10: <note>note:</note> previous declaration
12 | %token <note>foo</note> 123123
| <note>^~~</note>
]])
## ----------------------- ##
## Zero-width characters. ##
## ----------------------- ##
# We used to open twice the styling for characters that have a
# zero-width on display (e.g., \005).
AT_TEST([[Zero-width characters]],
[[%%
exp: an\005error.
]],
[1],
[[input.y:10.8: <error>error:</error> invalid character: '\\005'
10 | exp: an<error>\005</error>error.
| <error>^</error>
]])
## -------------------------------------- ##
## Tabulations and multibyte characters. ##
## -------------------------------------- ##
# Make sure we treat tabulations as eight spaces, and that multibyte
# characters have correct width.
AT_TEST([[Tabulations and multibyte characters]],
[[%%
exp: a b c d e f g
a: { }
b: { }
c: {------------}
d: {éééééééééééé}
e: { 42 }
f: { "฿¥$€₦" }
g: { 🐃 }
]],
[0],
[[input.y:11.4-17: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
11 | a: <warning>{ }</warning>
| <warning>^~~~~~~~~~~~~~</warning>
| <fixit-insert>%empty</fixit-insert>
input.y:12.4-17: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
12 | b: <warning>{ }</warning>
| <warning>^~~~~~~~~~~~~~</warning>
| <fixit-insert>%empty</fixit-insert>
input.y:13.4-17: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
13 | c: <warning>{------------}</warning>
| <warning>^~~~~~~~~~~~~~</warning>
| <fixit-insert>%empty</fixit-insert>
input.y:14.4-17: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
14 | d: <warning>{éééééééééééé}</warning>
| <warning>^~~~~~~~~~~~~~</warning>
| <fixit-insert>%empty</fixit-insert>
input.y:15.4-17: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
15 | e: <warning>{ 42 }</warning>
| <warning>^~~~~~~~~~~~~~</warning>
| <fixit-insert>%empty</fixit-insert>
input.y:16.4-17: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
16 | f: <warning>{ "฿¥$€₦" }</warning>
| <warning>^~~~~~~~~~~~~~</warning>
| <fixit-insert>%empty</fixit-insert>
input.y:17.4-17: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
17 | g: <warning>{ 🐃 }</warning>
| <warning>^~~~~~~~~~~~~~</warning>
| <fixit-insert>%empty</fixit-insert>
input.y: <warning>warning:</warning> fix-its can be applied. Rerun with option '--update'. [<warning>-Wother</warning>]
]])
# Likewise, but currently not portable to AIX and Cygwin.
# https://lists.gnu.org/r/bug-bison/2020-05/msg00050.html
# https://lists.gnu.org/r/bug-bison/2020-05/msg00003.html.
AT_TEST([[Tabulations and multibyte characters]],
[[%%
e: {∇⃗×𝐸⃗ = -∂𝐵⃗/∂t}
]],
[0],
[[input.y:10.4-17: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
10 | e: <warning>{∇⃗×𝐸⃗ = -∂𝐵⃗/∂t}</warning>
| <warning>^~~~~~~~~~~~~~</warning>
| <fixit-insert>%empty</fixit-insert>
input.y: <warning>warning:</warning> fix-its can be applied. Rerun with option '--update'. [<warning>-Wother</warning>]
]], [], [uname -a | $EGREP -i 'aix|cygwin'])
## --------------- ##
## Special files. ##
## --------------- ##
# Don't try to quote special files.
# https://lists.gnu.org/r/bug-bison/2019-04/msg00000.html
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90034
AT_TEST([[Special files]],
[[%%
exp: a b
a: {}
#line 1 "/dev/stdout"
b: {}
]],
[0],
[[input.y:11.4-5: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
11 | a: <warning>{}</warning>
| <warning>^~</warning>
| <fixit-insert>%empty</fixit-insert>
/dev/stdout:1.4-5: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
| <fixit-insert>%empty</fixit-insert>
input.y: <warning>warning:</warning> fix-its can be applied. Rerun with option '--update'. [<warning>-Wother</warning>]
]])
## -------------------- ##
## Complaints from M4. ##
## -------------------- ##
# Complaints issued m4 need complete locations (byte and column) for
# diagnostics.
AT_TEST([[Complaints from M4]],
[[%define error1 {e}
%define error2 {é}
%%
exp: %empty;
]],
[1],
[[input.y:9.1-27: <error>error:</error> %define variable 'error1' is not used
9 | <error>%define error1 {e}</error>
| <error>^~~~~~~~~~~~~~~~~~~~~~~~~~~</error>
input.y:10.1-27: <error>error:</error> %define variable 'error2' is not used
10 | <error>%define error2 {é}</error>
| <error>^~~~~~~~~~~~~~~~~~~~~~~~~~~</error>
]])
## ----------------- ##
## Carriage return. ##
## ----------------- ##
# Carriage-return used to count as a newline in the scanner, and not
# in diagnostics. Resulting in all kinds of nice bugs.
AT_TEST([[Carriage return]],
[[^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M
%token "
%%
]],
[1],
[[input.y:10.8-11.0: <error>error:</error> missing '"' at end of line
10 | %token <error>"</error>
| <error>^</error>
input.y:10.8-11.0: <error>error:</error> expected <expected>character literal</expected> or <expected>identifier</expected> or <expected><tag></expected> before <unexpected>string</unexpected>
10 | %token <error>"</error>
| <error>^</error>
]])
## ------- ##
## CR NL. ##
## ------- ##
# Check Windows EOLs.
AT_TEST([[CR NL]],
[[^M
%token ^M FOO^M
%token ^M FOO^M
%%^M
exp:^M
]],
[0],
[[input.y:11.9-11: <warning>warning:</warning> symbol FOO redeclared [<warning>-Wother</warning>]
11 | %token
<warning>FOO</warning>
| <warning>^~~</warning>
input.y:10.9-11: <note>note:</note> previous declaration
10 | %token
<note>FOO</note>
| <note>^~~</note>
input.y:13.5: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
13 | exp:
| <warning>^</warning>
| <fixit-insert>%empty</fixit-insert>
input.y: <warning>warning:</warning> fix-its can be applied. Rerun with option '--update'. [<warning>-Wother</warning>]
]])
## -------------- ##
## Screen width. ##
## -------------- ##
AT_TEST([[Screen width: 200 columns]],
[[%token ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ
%error-verbose
%%
exp: ABCDEFGHIJKLMNOPQRSTUVWXYZ
]],
[0],
[[input.y:9.36-61: <warning>warning:</warning> symbol ABCDEFGHIJKLMNOPQRSTUVWXYZ redeclared [<warning>-Wother</warning>]
9 | %token ABCDEFGHIJKLMNOPQRSTUVWXYZ <warning>ABCDEFGHIJKLMNOPQRSTUVWXYZ</warning> ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ
| <warning>^~~~~~~~~~~~~~~~~~~~~~~~~~</warning>
input.y:9.8-33: <note>note:</note> previous declaration
9 | %token <note>ABCDEFGHIJKLMNOPQRSTUVWXYZ</note> ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ
| <note>^~~~~~~~~~~~~~~~~~~~~~~~~~</note>
input.y:9.64-89: <warning>warning:</warning> symbol ABCDEFGHIJKLMNOPQRSTUVWXYZ redeclared [<warning>-Wother</warning>]
9 | %token ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ <warning>ABCDEFGHIJKLMNOPQRSTUVWXYZ</warning> ABCDEFGHIJKLMNOPQRSTUVWXYZ
| <warning>^~~~~~~~~~~~~~~~~~~~~~~~~~</warning>
input.y:9.8-33: <note>note:</note> previous declaration
9 | %token <note>ABCDEFGHIJKLMNOPQRSTUVWXYZ</note> ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ
| <note>^~~~~~~~~~~~~~~~~~~~~~~~~~</note>
input.y:9.92-117: <warning>warning:</warning> symbol ABCDEFGHIJKLMNOPQRSTUVWXYZ redeclared [<warning>-Wother</warning>]
9 | %token ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ <warning>ABCDEFGHIJKLMNOPQRSTUVWXYZ</warning>
| <warning>^~~~~~~~~~~~~~~~~~~~~~~~~~</warning>
input.y:9.8-33: <note>note:</note> previous declaration
9 | %token <note>ABCDEFGHIJKLMNOPQRSTUVWXYZ</note> ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ
| <note>^~~~~~~~~~~~~~~~~~~~~~~~~~</note>
input.y:10.56-69: <warning>warning:</warning> deprecated directive: '%error-verbose', use '%define parse.error verbose' [<warning>-Wdeprecated</warning>]
10 | <warning>%error-verbose</warning>
| <warning>^~~~~~~~~~~~~~</warning>
| <fixit-insert>%define parse.error verbose</fixit-insert>
input.y: <warning>warning:</warning> fix-its can be applied. Rerun with option '--update'. [<warning>-Wother</warning>]
]],
[[COLUMNS=200]])
AT_TEST([[Screen width: 80 columns]],
[[%token ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ
%error-verbose
%%
exp: ABCDEFGHIJKLMNOPQRSTUVWXYZ
]],
[0],
[[input.y:9.36-61: <warning>warning:</warning> symbol ABCDEFGHIJKLMNOPQRSTUVWXYZ redeclared [<warning>-Wother</warning>]
9 | %token ABCDEFGHIJKLMNOPQRSTUVWXYZ <warning>ABCDEFGHIJKLMNOPQRSTUVWXYZ</warning> ABCDEF...
| <warning>^~~~~~~~~~~~~~~~~~~~~~~~~~</warning>
input.y:9.8-33: <note>note:</note> previous declaration
9 | %token <note>ABCDEFGHIJKLMNOPQRSTUVWXYZ</note> ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEF...
| <note>^~~~~~~~~~~~~~~~~~~~~~~~~~</note>
input.y:9.64-89: <warning>warning:</warning> symbol ABCDEFGHIJKLMNOPQRSTUVWXYZ redeclared [<warning>-Wother</warning>]
9 | %token ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ <warning>ABCDEF</warning>...
| <warning>^~~~~~</warning>
input.y:9.8-33: <note>note:</note> previous declaration
9 | %token <note>ABCDEFGHIJKLMNOPQRSTUVWXYZ</note> ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEF...
| <note>^~~~~~~~~~~~~~~~~~~~~~~~~~</note>
input.y:9.92-117: <warning>warning:</warning> symbol ABCDEFGHIJKLMNOPQRSTUVWXYZ redeclared [<warning>-Wother</warning>]
9 | ...TUVWXYZ <warning>ABCDEFGHIJKLMNOPQRSTUVWXYZ</warning>
| <warning>^~~~~~~~~~~~~~~~~~~~~~~~~~</warning>
input.y:9.8-33: <note>note:</note> previous declaration
9 | %token <note>ABCDEFGHIJKLMNOPQRSTUVWXYZ</note> ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEF...
| <note>^~~~~~~~~~~~~~~~~~~~~~~~~~</note>
input.y:10.56-69: <warning>warning:</warning> deprecated directive: '%error-verbose', use '%define parse.error verbose' [<warning>-Wdeprecated</warning>]
10 | <warning>%error-verbose</warning>
| <warning>^~~~~~~~~~~~~~</warning>
| <fixit-insert>%define parse.error verbose</fixit-insert>
input.y: <warning>warning:</warning> fix-its can be applied. Rerun with option '--update'. [<warning>-Wother</warning>]
]],
[[COLUMNS=80]])
AT_TEST([[Screen width: 60 columns]],
[[%token ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ ABCDEFGHIJKLMNOPQRSTUVWXYZ
%error-verbose
%%
exp: ABCDEFGHIJKLMNOPQRSTUVWXYZ
]],
[0],
[[input.y:9.36-61: <warning>warning:</warning> symbol ABCDEFGHIJKLMNOPQRSTUVWXYZ redeclared [<warning>-Wother</warning>]
9 | %token ABCDEFGHIJKLMNOPQRSTUVWXYZ <warning>ABCDEFGHIJKLMN</warning>...
| <warning>^~~~~~~~~~~~~~</warning>
input.y:9.8-33: <note>note:</note> previous declaration
9 | %token <note>ABCDEFGHIJKLMNOPQRSTUVWXYZ</note> ABCDEFGHIJKLMN...
| <note>^~~~~~~~~~~~~~~~~~~~~~~~~~</note>
input.y:9.64-89: <warning>warning:</warning> symbol ABCDEFGHIJKLMNOPQRSTUVWXYZ redeclared [<warning>-Wother</warning>]
9 | ...TUVWXYZ <warning>ABCDEFGHIJKLMNOPQRSTUVWXYZ</warning> ABCDEFGHI...
| <warning>^~~~~~~~~~~~~~~~~~~~~~~~~~</warning>
input.y:9.8-33: <note>note:</note> previous declaration
9 | %token <note>ABCDEFGHIJKLMNOPQRSTUVWXYZ</note> ABCDEFGHIJKLMN...
| <note>^~~~~~~~~~~~~~~~~~~~~~~~~~</note>
input.y:9.92-117: <warning>warning:</warning> symbol ABCDEFGHIJKLMNOPQRSTUVWXYZ redeclared [<warning>-Wother</warning>]
9 | ...TUVWXYZ <warning>ABCDEFGHIJKLMNOPQRSTUVWXYZ</warning>
| <warning>^~~~~~~~~~~~~~~~~~~~~~~~~~</warning>
input.y:9.8-33: <note>note:</note> previous declaration
9 | %token <note>ABCDEFGHIJKLMNOPQRSTUVWXYZ</note> ABCDEFGHIJKLMN...
| <note>^~~~~~~~~~~~~~~~~~~~~~~~~~</note>
input.y:10.56-69: <warning>warning:</warning> deprecated directive: '%error-verbose', use '%define parse.error verbose' [<warning>-Wdeprecated</warning>]
10 | ... <warning>%error-verbose</warning>
| <warning>^~~~~~~~~~~~~~</warning>
| <fixit-insert>%define parse.error verbose</fixit-insert>
input.y: <warning>warning:</warning> fix-its can be applied. Rerun with option '--update'. [<warning>-Wother</warning>]
]],
[[COLUMNS=60]])
## ------------- ##
## Suggestions. ##
## ------------- ##
# Don't suggest to fix QUX with QUUX and QUUX with QUX...
AT_TEST([[Suggestions]],
[[%%
res: QUX baz
bar: QUUX
]],
[1],
[[input.y:10.6-8: <error>error:</error> symbol 'QUX' is used, but is not defined as a token and has no rules
10 | res: <error>QUX</error> baz
| <error>^~~</error>
input.y:10.10-12: <error>error:</error> symbol 'baz' is used, but is not defined as a token and has no rules; did you mean 'bar'?
10 | res: QUX <error>baz</error>
| <error>^~~</error>
| <fixit-insert>bar</fixit-insert>
input.y:11.6-9: <error>error:</error> symbol 'QUUX' is used, but is not defined as a token and has no rules
11 | bar: <error>QUUX</error>
| <error>^~~~</error>
]])
## ----------------- ##
## Counterexamples. ##
## ----------------- ##
AT_TEST([[Counterexamples]],
[[%expect 0
%%
exp
: "if" exp "then" exp
| "if" exp "then" exp "else" exp
| exp "+" exp
| "num"
| empty "a"
| "a" empty
empty
: %empty
]],
[1],
[[input.y: <error>error:</error> shift/reduce conflicts: 9 found, 0 expected
input.y: <warning>warning:</warning> shift/reduce conflict on token "a" [<warning>-Wcounterexamples</warning>]
Example: <cex-0><cex-dot>•</cex-dot> <cex-leaf>"a"</cex-leaf><cex-1></cex-1></cex-0>
Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 6: <cex-dot>•</cex-dot><cex-leaf> "a"</cex-leaf><cex-1><cex-step> empty</cex-step></cex-1></cex-step></cex-0>
<cex-1><cex-step> ↳ 6: ε</cex-step></cex-1>
Example: <cex-0><cex-1><cex-dot>•</cex-dot></cex-1> <cex-leaf>"a"</cex-leaf></cex-0>
Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 5: <cex-1><cex-step>empty</cex-step></cex-1><cex-leaf> "a"</cex-leaf></cex-step></cex-0>
<cex-1><cex-step> ↳ 7: ε<cex-dot> •</cex-dot></cex-step></cex-1>
input.y: <warning>warning:</warning> shift/reduce conflict on token "a" [<warning>-Wcounterexamples</warning>]
Example: <cex-0><cex-dot>•</cex-dot> <cex-leaf>"a"</cex-leaf><cex-1></cex-1></cex-0>
Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 6: <cex-dot>•</cex-dot><cex-leaf> "a"</cex-leaf><cex-1><cex-step> empty</cex-step></cex-1></cex-step></cex-0>
<cex-1><cex-step> ↳ 6: ε</cex-step></cex-1>
Example: <cex-0><cex-1><cex-dot>•</cex-dot></cex-1> <cex-leaf>"a"</cex-leaf></cex-0>
Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 5: <cex-1><cex-step>empty</cex-step></cex-1><cex-leaf> "a"</cex-leaf></cex-step></cex-0>
<cex-1><cex-step> ↳ 7: ε<cex-dot> •</cex-dot></cex-step></cex-1>
input.y: <warning>warning:</warning> shift/reduce conflict on token "a" [<warning>-Wcounterexamples</warning>]
Example: <cex-0><cex-dot>•</cex-dot> <cex-leaf>"a"</cex-leaf><cex-1></cex-1></cex-0>
Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 6: <cex-dot>•</cex-dot><cex-leaf> "a"</cex-leaf><cex-1><cex-step> empty</cex-step></cex-1></cex-step></cex-0>
<cex-1><cex-step> ↳ 6: ε</cex-step></cex-1>
Example: <cex-0><cex-1><cex-dot>•</cex-dot></cex-1> <cex-leaf>"a"</cex-leaf></cex-0>
Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 5: <cex-1><cex-step>empty</cex-step></cex-1><cex-leaf> "a"</cex-leaf></cex-step></cex-0>
<cex-1><cex-step> ↳ 7: ε<cex-dot> •</cex-dot></cex-step></cex-1>
input.y: <warning>warning:</warning> shift/reduce conflict on token "a" [<warning>-Wcounterexamples</warning>]
Example: <cex-0><cex-dot>•</cex-dot> <cex-leaf>"a"</cex-leaf><cex-1></cex-1></cex-0>
Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 6: <cex-dot>•</cex-dot><cex-leaf> "a"</cex-leaf><cex-1><cex-step> empty</cex-step></cex-1></cex-step></cex-0>
<cex-1><cex-step> ↳ 6: ε</cex-step></cex-1>
Example: <cex-0><cex-1><cex-dot>•</cex-dot></cex-1> <cex-leaf>"a"</cex-leaf></cex-0>
Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 5: <cex-1><cex-step>empty</cex-step></cex-1><cex-leaf> "a"</cex-leaf></cex-step></cex-0>
<cex-1><cex-step> ↳ 7: ε<cex-dot> •</cex-dot></cex-step></cex-1>
input.y: <warning>warning:</warning> shift/reduce conflict on token "+" [<warning>-Wcounterexamples</warning>]
Example: <cex-0><cex-leaf>exp</cex-leaf> <cex-leaf>"+"</cex-leaf><cex-1> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-1></cex-0>
Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 3: <cex-leaf>exp</cex-leaf><cex-leaf> "+"</cex-leaf><cex-1><cex-step> exp</cex-step></cex-1></cex-step></cex-0>
<cex-1><cex-step> ↳ 3: <cex-leaf>exp</cex-leaf><cex-dot> •</cex-dot><cex-leaf> "+"</cex-leaf><cex-leaf> exp</cex-leaf></cex-step></cex-1>
Example: <cex-0><cex-1><cex-leaf>exp</cex-leaf> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot></cex-1> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-0>
Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 3: <cex-1><cex-step>exp</cex-step></cex-1><cex-leaf> "+"</cex-leaf><cex-leaf> exp</cex-leaf></cex-step></cex-0>
<cex-1><cex-step> ↳ 3: <cex-leaf>exp</cex-leaf><cex-leaf> "+"</cex-leaf><cex-leaf> exp</cex-leaf><cex-dot> •</cex-dot></cex-step></cex-1>
input.y: <warning>warning:</warning> shift/reduce conflict on token "else" [<warning>-Wcounterexamples</warning>]
Example: <cex-0><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf><cex-1> <cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot> <cex-leaf>"else"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-1></cex-0>
Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 1: <cex-leaf>"if"</cex-leaf><cex-leaf> exp</cex-leaf><cex-leaf> "then"</cex-leaf><cex-1><cex-step> exp</cex-step></cex-1></cex-step></cex-0>
<cex-1><cex-step> ↳ 2: <cex-leaf>"if"</cex-leaf><cex-leaf> exp</cex-leaf><cex-leaf> "then"</cex-leaf><cex-leaf> exp</cex-leaf><cex-dot> •</cex-dot><cex-leaf> "else"</cex-leaf><cex-leaf> exp</cex-leaf></cex-step></cex-1>
Example: <cex-0><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf><cex-1> <cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot></cex-1> <cex-leaf>"else"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-0>
Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 2: <cex-leaf>"if"</cex-leaf><cex-leaf> exp</cex-leaf><cex-leaf> "then"</cex-leaf><cex-1><cex-step> exp</cex-step></cex-1><cex-leaf> "else"</cex-leaf><cex-leaf> exp</cex-leaf></cex-step></cex-0>
<cex-1><cex-step> ↳ 1: <cex-leaf>"if"</cex-leaf><cex-leaf> exp</cex-leaf><cex-leaf> "then"</cex-leaf><cex-leaf> exp</cex-leaf><cex-dot> •</cex-dot></cex-step></cex-1>
input.y: <warning>warning:</warning> shift/reduce conflict on token "+" [<warning>-Wcounterexamples</warning>]
Example: <cex-0><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf><cex-1> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-1></cex-0>
Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 1: <cex-leaf>"if"</cex-leaf><cex-leaf> exp</cex-leaf><cex-leaf> "then"</cex-leaf><cex-1><cex-step> exp</cex-step></cex-1></cex-step></cex-0>
<cex-1><cex-step> ↳ 3: <cex-leaf>exp</cex-leaf><cex-dot> •</cex-dot><cex-leaf> "+"</cex-leaf><cex-leaf> exp</cex-leaf></cex-step></cex-1>
Example: <cex-0><cex-1><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot></cex-1> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-0>
Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 3: <cex-1><cex-step>exp</cex-step></cex-1><cex-leaf> "+"</cex-leaf><cex-leaf> exp</cex-leaf></cex-step></cex-0>
<cex-1><cex-step> ↳ 1: <cex-leaf>"if"</cex-leaf><cex-leaf> exp</cex-leaf><cex-leaf> "then"</cex-leaf><cex-leaf> exp</cex-leaf><cex-dot> •</cex-dot></cex-step></cex-1>
input.y: <warning>warning:</warning> shift/reduce conflict on token "a" [<warning>-Wcounterexamples</warning>]
Example: <cex-0><cex-dot>•</cex-dot> <cex-leaf>"a"</cex-leaf><cex-1></cex-1></cex-0>
Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 6: <cex-dot>•</cex-dot><cex-leaf> "a"</cex-leaf><cex-1><cex-step> empty</cex-step></cex-1></cex-step></cex-0>
<cex-1><cex-step> ↳ 6: ε</cex-step></cex-1>
Example: <cex-0><cex-1><cex-dot>•</cex-dot></cex-1> <cex-leaf>"a"</cex-leaf></cex-0>
Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 5: <cex-1><cex-step>empty</cex-step></cex-1><cex-leaf> "a"</cex-leaf></cex-step></cex-0>
<cex-1><cex-step> ↳ 7: ε<cex-dot> •</cex-dot></cex-step></cex-1>
input.y: <warning>warning:</warning> shift/reduce conflict on token "+" [<warning>-Wcounterexamples</warning>]
Example: <cex-0><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"else"</cex-leaf><cex-1> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-1></cex-0>
Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 2: <cex-leaf>"if"</cex-leaf><cex-leaf> exp</cex-leaf><cex-leaf> "then"</cex-leaf><cex-leaf> exp</cex-leaf><cex-leaf> "else"</cex-leaf><cex-1><cex-step> exp</cex-step></cex-1></cex-step></cex-0>
<cex-1><cex-step> ↳ 3: <cex-leaf>exp</cex-leaf><cex-dot> •</cex-dot><cex-leaf> "+"</cex-leaf><cex-leaf> exp</cex-leaf></cex-step></cex-1>
Example: <cex-0><cex-1><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"else"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot></cex-1> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-0>
Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 3: <cex-1><cex-step>exp</cex-step></cex-1><cex-leaf> "+"</cex-leaf><cex-leaf> exp</cex-leaf></cex-step></cex-0>
<cex-1><cex-step> ↳ 2: <cex-leaf>"if"</cex-leaf><cex-leaf> exp</cex-leaf><cex-leaf> "then"</cex-leaf><cex-leaf> exp</cex-leaf><cex-leaf> "else"</cex-leaf><cex-leaf> exp</cex-leaf><cex-dot> •</cex-dot></cex-step></cex-1>
]])
AT_TEST([[Deep Counterexamples]],
[[%expect 0
%%
exp: x1 e1 foo1 x1 | y1 e2 bar1 y1
foo1: foo2
foo2: foo3
foo3: x1 foo4
foo4: "quuux"
bar1: bar2
bar2: bar3
bar3: y1 bar4
bar4: "quuux"
x1: x2
x2: x3
x3: "X"
y1: y2
y2: y3
y3: "X"
e1:
e2:
]],
[1],
[[input.y:30.4: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
30 | e1:
| <warning>^</warning>
| <fixit-insert>%empty</fixit-insert>
input.y:31.4: <warning>warning:</warning> empty rule without %empty [<warning>-Wempty-rule</warning>]
31 | e2:
| <warning>^</warning>
| <fixit-insert>%empty</fixit-insert>
input.y: <error>error:</error> reduce/reduce conflicts: 1 found, 0 expected
input.y: <warning>warning:</warning> reduce/reduce conflict on token "X" [<warning>-Wcounterexamples</warning>]
Example: <cex-0><cex-1><cex-2><cex-3><cex-leaf>"X"</cex-leaf> <cex-dot>•</cex-dot></cex-3></cex-2></cex-1><cex-4></cex-4><cex-5><cex-6><cex-7><cex-8><cex-9><cex-10> <cex-leaf>"X"</cex-leaf></cex-10></cex-9></cex-8><cex-11> <cex-leaf>"quuux"</cex-leaf></cex-11></cex-7></cex-6></cex-5><cex-12><cex-13><cex-14> <cex-leaf>"X"</cex-leaf></cex-14></cex-13></cex-12></cex-0>
First reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 1: <cex-1><cex-step>x1</cex-step></cex-1><cex-4><cex-step> e1</cex-step></cex-4><cex-5><cex-step> foo1</cex-step></cex-5><cex-12><cex-step> x1</cex-step></cex-12></cex-step></cex-0>
<cex-1><cex-step> ↳ 11: <cex-2><cex-step>x2</cex-step></cex-2></cex-step></cex-1><cex-4><cex-step> ↳ 1: ε</cex-step></cex-4><cex-5><cex-step> ↳ 3: <cex-6><cex-step>foo2</cex-step></cex-6></cex-step></cex-5><cex-12><cex-step> ↳ 11: <cex-13><cex-step>x2</cex-step></cex-13></cex-step></cex-12>
<cex-2><cex-step> ↳ 12: <cex-3><cex-step>x3</cex-step></cex-3></cex-step></cex-2><cex-6><cex-step> ↳ 4: <cex-7><cex-step>foo3</cex-step></cex-7></cex-step></cex-6><cex-13><cex-step> ↳ 12: <cex-14><cex-step>x3</cex-step></cex-14></cex-step></cex-13>
<cex-3><cex-step> ↳ 13: <cex-leaf>"X"</cex-leaf><cex-dot> •</cex-dot></cex-step></cex-3><cex-7><cex-step> ↳ 5: <cex-8><cex-step>x1</cex-step></cex-8><cex-11><cex-step> foo4</cex-step></cex-11></cex-step></cex-7><cex-14><cex-step> ↳ 13: <cex-leaf>"X"</cex-leaf></cex-step></cex-14>
<cex-8><cex-step> ↳ 11: <cex-9><cex-step>x2</cex-step></cex-9></cex-step></cex-8><cex-11><cex-step> ↳ 6: <cex-leaf>"quuux"</cex-leaf></cex-step></cex-11>
<cex-9><cex-step> ↳ 12: <cex-10><cex-step>x3</cex-step></cex-10></cex-step></cex-9>
<cex-10><cex-step> ↳ 13: <cex-leaf>"X"</cex-leaf></cex-step></cex-10>
Example: <cex-0><cex-1><cex-2><cex-3><cex-leaf>"X"</cex-leaf> <cex-dot>•</cex-dot></cex-3></cex-2></cex-1><cex-4></cex-4><cex-5><cex-6><cex-7><cex-8><cex-9><cex-10> <cex-leaf>"X"</cex-leaf></cex-10></cex-9></cex-8><cex-11> <cex-leaf>"quuux"</cex-leaf></cex-11></cex-7></cex-6></cex-5><cex-12><cex-13><cex-14> <cex-leaf>"X"</cex-leaf></cex-14></cex-13></cex-12></cex-0>
Second reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0>
<cex-0><cex-step>↳ 2: <cex-1><cex-step>y1</cex-step></cex-1><cex-4><cex-step> e2</cex-step></cex-4><cex-5><cex-step> bar1</cex-step></cex-5><cex-12><cex-step> y1</cex-step></cex-12></cex-step></cex-0>
<cex-1><cex-step> ↳ 14: <cex-2><cex-step>y2</cex-step></cex-2></cex-step></cex-1><cex-4><cex-step> ↳ 2: ε</cex-step></cex-4><cex-5><cex-step> ↳ 7: <cex-6><cex-step>bar2</cex-step></cex-6></cex-step></cex-5><cex-12><cex-step> ↳ 14: <cex-13><cex-step>y2</cex-step></cex-13></cex-step></cex-12>
<cex-2><cex-step> ↳ 15: <cex-3><cex-step>y3</cex-step></cex-3></cex-step></cex-2><cex-6><cex-step> ↳ 8: <cex-7><cex-step>bar3</cex-step></cex-7></cex-step></cex-6><cex-13><cex-step> ↳ 15: <cex-14><cex-step>y3</cex-step></cex-14></cex-step></cex-13>
<cex-3><cex-step> ↳ 16: <cex-leaf>"X"</cex-leaf><cex-dot> •</cex-dot></cex-step></cex-3><cex-7><cex-step> ↳ 9: <cex-8><cex-step>y1</cex-step></cex-8><cex-11><cex-step> bar4</cex-step></cex-11></cex-step></cex-7><cex-14><cex-step> ↳ 16: <cex-leaf>"X"</cex-leaf></cex-step></cex-14>
<cex-8><cex-step> ↳ 14: <cex-9><cex-step>y2</cex-step></cex-9></cex-step></cex-8><cex-11><cex-step> ↳ 10: <cex-leaf>"quuux"</cex-leaf></cex-step></cex-11>
<cex-9><cex-step> ↳ 15: <cex-10><cex-step>y3</cex-step></cex-10></cex-step></cex-9>
<cex-10><cex-step> ↳ 16: <cex-leaf>"X"</cex-leaf></cex-step></cex-10>
input.y: <warning>warning:</warning> fix-its can be applied. Rerun with option '--update'. [<warning>-Wother</warning>]
]])
m4_popdef([AT_TEST])
## -------------------------------------- ##
## Indentation with message suppression. ##
## -------------------------------------- ##
AT_SETUP([[Indentation with message suppression]])
# https://lists.gnu.org/r/bug-bison/2019-08/msg00002.html
AT_DATA([[input.y]],
[[%define api.pure
%pure-parser
%error-verbose
%%
exp : '0'
]])
AT_BISON_CHECK([[-fcaret -Wno-other input.y]], [0], [],
[[input.y:2.1-12: warning: deprecated directive: '%pure-parser', use '%define api.pure' [-Wdeprecated]
2 | %pure-parser
| ^~~~~~~~~~~~
| %define api.pure
input.y:3.1-14: warning: deprecated directive: '%error-verbose', use '%define parse.error verbose' [-Wdeprecated]
3 | %error-verbose
| ^~~~~~~~~~~~~~
| %define parse.error verbose
]])
AT_CLEANUP
|
