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cex: don't display twice unifying examples if there is no color

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It makes no sense, and is actually confusing, to display twice the
same example with no visible difference.

* src/complain.h, src/complain.c (is_styled): New.
* src/counterexample.c (print_counterexample): Display the unified
example a second time only if it makes a difference.
* tests/conflicts.at, tests/counterexample.at, tests/report.at: Adjust.
* tests/diagnostics.at: Make sure we do display the unifying examples
twice when colors are enabled.  And check those colors.
This commit is contained in:
Akim Demaille
2020-06-19 07:06:24 +02:00
parent 69e3b405d9
commit 0f120354b6
7 changed files with 78 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/complain.c
View File

@@ -104,6 +104,23 @@ flush (FILE *out)
fflush (out); fflush (out);
} }
bool
is_styled (FILE *out)
{
if (out != stderr)
return false;
if (color_debug)
return true;
#if HAVE_LIBTEXTSTYLE
return (color_mode == color_yes
|| color_mode == color_html
|| (color_mode == color_tty && isatty (STDERR_FILENO)));
#else
return false;
#endif
}
/*------------------------. /*------------------------.
| --warnings's handling. | | --warnings's handling. |
`------------------------*/ `------------------------*/
@@ -288,9 +305,7 @@ void
complain_init_color (void) complain_init_color (void)
{ {
#if HAVE_LIBTEXTSTYLE #if HAVE_LIBTEXTSTYLE
if (color_mode == color_yes if (is_styled (stderr))
|| color_mode == color_html
|| (color_mode == color_tty && isatty (STDERR_FILENO)))
{ {
style_file_prepare ("BISON_STYLE", "BISON_STYLEDIR", pkgdatadir (), style_file_prepare ("BISON_STYLE", "BISON_STYLEDIR", pkgdatadir (),
"bison-default.css"); "bison-default.css");

2
src/complain.h
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@@ -36,6 +36,8 @@ void end_use_class (const char *style, FILE *out);
/** Flush \a out. */ /** Flush \a out. */
void flush (FILE *out); void flush (FILE *out);
/** Whether there's styling on OUT. */
bool is_styled (FILE *out);
/*-------------. /*-------------.
| --warnings. | | --warnings. |

13
src/counterexample.c
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@@ -27,6 +27,7 @@
#include <gl_rbtreehash_list.h> #include <gl_rbtreehash_list.h>
#include <hash.h> #include <hash.h>
#include <stdlib.h> #include <stdlib.h>
#include <textstyle.h>
#include <time.h> #include <time.h>
#include "closure.h" #include "closure.h"
@@ -109,9 +110,15 @@ print_counterexample (counterexample *cex, FILE *out, const char *prefix)
prefix, _("First derivation")); prefix, _("First derivation"));
derivation_print (cex->d1, out, prefix); derivation_print (cex->d1, out, prefix);
fprintf (out, " %s%-20s ", // If we output to the terminal (via stderr) and we have color
prefix, cex->unifying ? _("Example") : _("Second example")); // support, display unifying examples a second time, as color allows
derivation_print_leaves (cex->d2, out, prefix); // to see the differences.
if (!cex->unifying || is_styled (stderr))
{
fprintf (out, " %s%-20s ",
prefix, cex->unifying ? _("Example") : _("Second example"));
derivation_print_leaves (cex->d2, out, prefix);
}
fprintf (out, " %s%-20s ", fprintf (out, " %s%-20s ",
prefix, _("Second derivation")); prefix, _("Second derivation"));
derivation_print (cex->d2, out, prefix); derivation_print (cex->d2, out, prefix);

6
tests/conflicts.at
View File

@@ -763,7 +763,7 @@ AT_CLEANUP
AT_SETUP([Unresolved SR Conflicts]) AT_SETUP([Unresolved SR Conflicts])
AT_KEYWORDS([report]) AT_KEYWORDS([cex report])
AT_DATA([input.y], AT_DATA([input.y],
[[%token NUM OP [[%token NUM OP
@@ -866,7 +866,6 @@ State 5
1 exp: exp . OP exp 1 exp: exp . OP exp
Example exp OP exp . OP exp Example exp OP exp . OP exp
First derivation exp ::=[ exp ::=[ exp OP exp . ] OP exp ] First derivation exp ::=[ exp ::=[ exp OP exp . ] OP exp ]
Example exp OP exp . OP exp
Second derivation exp ::=[ exp OP exp ::=[ exp . OP exp ] ] Second derivation exp ::=[ exp OP exp ::=[ exp . OP exp ] ]
]]) ]])
@@ -1209,7 +1208,6 @@ State 1
4 id: '0' . 4 id: '0' .
Example '0' . Example '0' .
First derivation exp ::=[ num ::=[ '0' . ] ] First derivation exp ::=[ num ::=[ '0' . ] ]
Example '0' .
Second derivation exp ::=[ id ::=[ '0' . ] ] Second derivation exp ::=[ id ::=[ '0' . ] ]
@@ -1776,7 +1774,6 @@ State 5
9 reported_conflicts: 'a' . 9 reported_conflicts: 'a' .
Example 'a' . Example 'a' .
First derivation reported_conflicts ::=[ 'a' . ] First derivation reported_conflicts ::=[ 'a' . ]
Example 'a' .
Second derivation reported_conflicts ::=[ 'a' . ] Second derivation reported_conflicts ::=[ 'a' . ]
@@ -1961,7 +1958,6 @@ AT_CHECK([[cat input.output | sed -n '/^State 0$/,/^State 1$/p']], 0,
13 empty_c3: . %empty 13 empty_c3: . %empty
Example . 'c' Example . 'c'
First derivation start ::=[ empty_c2 ::=[ . ] 'c' ] First derivation start ::=[ empty_c2 ::=[ . ] 'c' ]
Example . 'c'
Second derivation start ::=[ empty_c3 ::=[ . ] 'c' ] Second derivation start ::=[ empty_c3 ::=[ . ] 'c' ]

12
tests/counterexample.at
View File

@@ -48,7 +48,6 @@ AT_BISON_CHECK_CEX([input.y], [], [],
Shift/reduce conflict on token B: Shift/reduce conflict on token B:
Example A . B C Example A . B C
First derivation s ::=[ a ::=[ A . ] x ::=[ B C ] ] First derivation s ::=[ a ::=[ A . ] x ::=[ B C ] ]
Example A . B C
Second derivation s ::=[ y ::=[ A . B ] c ::=[ C ] ] Second derivation s ::=[ y ::=[ A . B ] c ::=[ C ] ]
input.y:4.4: warning: rule useless in parser due to conflicts [-Wother] input.y:4.4: warning: rule useless in parser due to conflicts [-Wother]
@@ -78,7 +77,6 @@ AT_BISON_CHECK_CEX([input.y], [], [],
Shift/reduce conflict on token B: Shift/reduce conflict on token B:
Example A . B C Example A . B C
First derivation s ::=[ a ::=[ A . ] bc ::=[ B C ] ] First derivation s ::=[ a ::=[ A . ] bc ::=[ B C ] ]
Example A . B C
Second derivation s ::=[ ac ::=[ A ac ::=[ b ::=[ . B ] ] C ] ] Second derivation s ::=[ ac ::=[ A ac ::=[ b ::=[ . B ] ] C ] ]
input.y:6.4: warning: rule useless in parser due to conflicts [-Wother] input.y:6.4: warning: rule useless in parser due to conflicts [-Wother]
@@ -109,7 +107,6 @@ AT_BISON_CHECK_CEX([input.y], [], [],
Shift/reduce conflict on token B: Shift/reduce conflict on token B:
Example A . B Example A . B
First derivation s ::=[ ax ::=[ A x ::=[ . ] ] by ::=[ B y ::=[ ] ] ] First derivation s ::=[ ax ::=[ A x ::=[ . ] ] by ::=[ B y ::=[ ] ] ]
Example A . B
Second derivation s ::=[ A xby ::=[ . B ] ] Second derivation s ::=[ A xby ::=[ . B ] ]
Shift/reduce conflict on token B: Shift/reduce conflict on token B:
@@ -208,7 +205,6 @@ AT_BISON_CHECK_CEX([input.y], [], [],
Shift/reduce conflict on token A: Shift/reduce conflict on token A:
Example b . A X X Y Example b . A X X Y
First derivation a ::=[ r ::=[ b . ] t ::=[ A x ::=[ X ] xy ::=[ X Y ] ] ] First derivation a ::=[ r ::=[ b . ] t ::=[ A x ::=[ X ] xy ::=[ X Y ] ] ]
Example b . A X X Y
Second derivation a ::=[ s ::=[ b . xx ::=[ A X X ] y ::=[ Y ] ] ] Second derivation a ::=[ s ::=[ b . xx ::=[ A X X ] y ::=[ Y ] ] ]
Shift/reduce conflict on token X: Shift/reduce conflict on token X:
@@ -242,7 +238,6 @@ AT_BISON_CHECK_CEX([input.y], [], [],
Reduce/reduce conflict on token $end: Reduce/reduce conflict on token $end:
Example A b . Example A b .
First derivation a ::=[ A b . ] First derivation a ::=[ A b . ]
Example A b .
Second derivation a ::=[ A b ::=[ b . ] ] Second derivation a ::=[ A b ::=[ b . ] ]
input.y:4.9: warning: rule useless in parser due to conflicts [-Wother] input.y:4.9: warning: rule useless in parser due to conflicts [-Wother]
@@ -331,7 +326,6 @@ AT_BISON_CHECK_CEX([input.y], [], [],
Shift/reduce conflict on token B: Shift/reduce conflict on token B:
Example N A . B C Example N A . B C
First derivation s ::=[ n ::=[ N a ::=[ A . ] B ] C ] First derivation s ::=[ n ::=[ N a ::=[ A . ] B ] C ]
Example N A . B C
Second derivation s ::=[ n ::=[ N b ::=[ A . B C ] ] ] Second derivation s ::=[ n ::=[ N b ::=[ A . B C ] ] ]
input.y:5.4: warning: rule useless in parser due to conflicts [-Wother] input.y:5.4: warning: rule useless in parser due to conflicts [-Wother]
@@ -364,13 +358,11 @@ AT_BISON_CHECK_CEX([input.y], [], [],
Reduce/reduce conflict on tokens b, c: Reduce/reduce conflict on tokens b, c:
Example B . b c Example B . b c
First derivation S ::=[ B ::=[ A ::=[ B . ] b A ::=[ ] ] C ::=[ A ::=[ ] c A ::=[ ] ] ] First derivation S ::=[ B ::=[ A ::=[ B . ] b A ::=[ ] ] C ::=[ A ::=[ ] c A ::=[ ] ] ]
Example B . b c
Second derivation S ::=[ B C ::=[ A ::=[ B ::=[ A ::=[ . ] b A ::=[ ] ] ] c A ::=[ ] ] ] Second derivation S ::=[ B C ::=[ A ::=[ B ::=[ A ::=[ . ] b A ::=[ ] ] ] c A ::=[ ] ] ]
Reduce/reduce conflict on tokens b, c: Reduce/reduce conflict on tokens b, c:
Example C . c b Example C . c b
First derivation S ::=[ C ::=[ A ::=[ C . ] c A ::=[ ] ] B ::=[ A ::=[ ] b A ::=[ ] ] ] First derivation S ::=[ C ::=[ A ::=[ C . ] c A ::=[ ] ] B ::=[ A ::=[ ] b A ::=[ ] ] ]
Example C . c b
Second derivation S ::=[ C B ::=[ A ::=[ C ::=[ A ::=[ . ] c A ::=[ ] ] ] b A ::=[ ] ] ] Second derivation S ::=[ C B ::=[ A ::=[ C ::=[ A ::=[ . ] c A ::=[ ] ] ] b A ::=[ ] ] ]
]]) ]])
@@ -438,13 +430,11 @@ Shift/reduce conflict on token A:
Reduce/reduce conflict on token $end: Reduce/reduce conflict on token $end:
Example b d . Example b d .
First derivation a ::=[ b d . ] First derivation a ::=[ b d . ]
Example b d .
Second derivation a ::=[ b d ::=[ d . ] ] Second derivation a ::=[ b d ::=[ d . ] ]
Reduce/reduce conflict on token $end: Reduce/reduce conflict on token $end:
Example c d . Example c d .
First derivation a ::=[ c d . ] First derivation a ::=[ c d . ]
Example c d .
Second derivation a ::=[ c d ::=[ d . ] ] Second derivation a ::=[ c d ::=[ d . ] ]
input.y:5.4: warning: rule useless in parser due to conflicts [-Wother] input.y:5.4: warning: rule useless in parser due to conflicts [-Wother]
@@ -476,7 +466,6 @@ AT_BISON_CHECK_CEX([input.y], [], [],
Shift/reduce conflict on token J: Shift/reduce conflict on token J:
Example H i J . J J Example H i J . J J
First derivation s ::=[ a ::=[ H i ::=[ i J . ] J J ] ] First derivation s ::=[ a ::=[ H i ::=[ i J . ] J J ] ]
Example H i J . J J
Second derivation s ::=[ a ::=[ H i J . J ] J ] Second derivation s ::=[ a ::=[ H i J . J ] J ]
input.y:5.13-15: warning: rule useless in parser due to conflicts [-Wother] input.y:5.13-15: warning: rule useless in parser due to conflicts [-Wother]
@@ -509,7 +498,6 @@ AT_BISON_CHECK_CEX([input.y], [], [],
Shift/reduce conflict on token D: Shift/reduce conflict on token D:
Example A a . D Example A a . D
First derivation s ::=[ A a a ::=[ b ::=[ c ::=[ . ] ] ] d ::=[ D ] ] First derivation s ::=[ A a a ::=[ b ::=[ c ::=[ . ] ] ] d ::=[ D ] ]
Example A a . D
Second derivation s ::=[ A a d ::=[ . D ] ] Second derivation s ::=[ A a d ::=[ . D ] ]
]]) ]])

50
tests/diagnostics.at
View File

@@ -49,15 +49,24 @@ 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) : $v}ge' input.y experr]) AT_PERL_REQUIRE([-pi -e 's{\^M}{\r}g;s{\\(\d{3}|.)}{$v = $[]1; $v =~ /\A\d+\z/ ? chr($v) : $v}ge' input.y experr])
fi fi
AT_CHECK([LC_ALL="$locale" $5 bison -fcaret --color=debug -Wall input.y], [$3], [], [experr]) AT_CHECK([LC_ALL="$locale" $5 bison -fcaret --color=debug -Wall,cex input.y], [$3], [], [experr])
# When no style, same messages, but without style. # When no style, same messages, but without style.
AT_PERL_REQUIRE([-pi -e 's{(</?(-|\w)+>)}{ $[]1 eq "<tag>" ? $[]1 : "" }ge' experr]) # 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 $example % 2 == 0;
}
' experr])
# Cannot use AT_BISON_CHECK easily as we need to change the # Cannot use AT_BISON_CHECK easily as we need to change the
# environment. # environment.
# FIXME: Enhance AT_BISON_CHECK. # FIXME: Enhance AT_BISON_CHECK.
AT_CHECK([LC_ALL="$locale" $5 bison -fcaret -Wall input.y], [$3], [], [experr]) AT_CHECK([LC_ALL="$locale" $5 bison -fcaret -Wall,cex input.y], [$3], [], [experr])
AT_BISON_OPTION_POPDEFS AT_BISON_OPTION_POPDEFS
@@ -509,6 +518,41 @@ input.y:11.6-9: <error>error:</error> symbol 'QUUX' is used, but is not defined
11 | bar: <error>QUUX</error> 11 | bar: <error>QUUX</error>
| <error>^~~~</error> | <error>^~~~</error>
]]) ]])
## ----------------- ##
## Counterexamples. ##
## ----------------- ##
AT_TEST([[Counterexamples]],
[[%expect 0
%%
exp
: "if" exp "then" exp
| "if" exp "then" exp "else" exp
| exp "+" exp
| "num"
]],
[1],
[[input.y: <error>error:</error> shift/reduce conflicts: 4 found, 0 expected
Shift/reduce conflict on token "+":
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>
First derivation <cex-0><cex-step>exp ::=[ </cex-step><cex-1><cex-step>exp ::=[ </cex-step><cex-leaf>exp</cex-leaf> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot><cex-step> ]</cex-step></cex-1> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf><cex-step> ]</cex-step></cex-0>
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>
Second derivation <cex-0><cex-step>exp ::=[ </cex-step><cex-leaf>exp</cex-leaf> <cex-leaf>"+"</cex-leaf><cex-1> <cex-step>exp ::=[ </cex-step><cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf><cex-step> ]</cex-step></cex-1><cex-step> ]</cex-step></cex-0>
Shift/reduce conflict on token "else":
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>
First derivation <cex-0><cex-step>exp ::=[ </cex-step><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf><cex-1> <cex-step>exp ::=[ </cex-step><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-step></cex-1> <cex-leaf>"else"</cex-leaf> <cex-leaf>exp</cex-leaf><cex-step> ]</cex-step></cex-0>
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>
Second derivation <cex-0><cex-step>exp ::=[ </cex-step><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf><cex-1> <cex-step>exp ::=[ </cex-step><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-step></cex-1><cex-step> ]</cex-step></cex-0>
Shift/reduce conflict on token "+":
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>
First derivation <cex-0><cex-step>exp ::=[ </cex-step><cex-1><cex-step>exp ::=[ </cex-step><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-step></cex-1> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf><cex-step> ]</cex-step></cex-0>
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>
Second derivation <cex-0><cex-step>exp ::=[ </cex-step><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-leaf>exp</cex-leaf> <cex-dot>•</cex-dot> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf><cex-step> ]</cex-step></cex-1><cex-step> ]</cex-step></cex-0>
]]) ]])

8
tests/report.at
View File

@@ -1173,25 +1173,21 @@ input.y: warning: 3 reduce/reduce conflicts [-Wconflicts-rr]
Shift/reduce conflict on token "⊕": Shift/reduce conflict on token "⊕":
Example exp "+" exp • "⊕" exp Example exp "+" exp • "⊕" exp
First derivation exp ::=[ exp ::=[ exp "+" exp • ] "⊕" exp ] First derivation exp ::=[ exp ::=[ exp "+" exp • ] "⊕" exp ]
Example exp "+" exp • "⊕" exp
Second derivation exp ::=[ exp "+" exp ::=[ exp • "⊕" exp ] ] Second derivation exp ::=[ exp "+" exp ::=[ exp • "⊕" exp ] ]
Reduce/reduce conflict on tokens $end, "+", "⊕": Reduce/reduce conflict on tokens $end, "+", "⊕":
Example exp "+" exp • Example exp "+" exp •
First derivation exp ::=[ exp "+" exp • ] First derivation exp ::=[ exp "+" exp • ]
Example exp "+" exp •
Second derivation exp ::=[ exp "+" exp • ] Second derivation exp ::=[ exp "+" exp • ]
Shift/reduce conflict on token "⊕": Shift/reduce conflict on token "⊕":
Example exp "+" exp • "⊕" exp Example exp "+" exp • "⊕" exp
First derivation exp ::=[ exp ::=[ exp "+" exp • ] "⊕" exp ] First derivation exp ::=[ exp ::=[ exp "+" exp • ] "⊕" exp ]
Example exp "+" exp • "⊕" exp
Second derivation exp ::=[ exp "+" exp ::=[ exp • "⊕" exp ] ] Second derivation exp ::=[ exp "+" exp ::=[ exp • "⊕" exp ] ]
Shift/reduce conflict on token "⊕": Shift/reduce conflict on token "⊕":
Example exp "⊕" exp • "⊕" exp Example exp "⊕" exp • "⊕" exp
First derivation exp ::=[ exp ::=[ exp "⊕" exp • ] "⊕" exp ] First derivation exp ::=[ exp ::=[ exp "⊕" exp • ] "⊕" exp ]
Example exp "⊕" exp • "⊕" exp
Second derivation exp ::=[ exp "⊕" exp ::=[ exp • "⊕" exp ] ] Second derivation exp ::=[ exp "⊕" exp ::=[ exp • "⊕" exp ] ]
input.y:6.3-13: warning: rule useless in parser due to conflicts [-Wother] input.y:6.3-13: warning: rule useless in parser due to conflicts [-Wother]
@@ -1342,7 +1338,6 @@ State 7
1 exp: exp • "⊕" exp 1 exp: exp • "⊕" exp
Example exp "+" exp • "⊕" exp Example exp "+" exp • "⊕" exp
First derivation exp ::=[ exp ::=[ exp "+" exp • ] "⊕" exp ] First derivation exp ::=[ exp ::=[ exp "+" exp • ] "⊕" exp ]
Example exp "+" exp • "⊕" exp
Second derivation exp ::=[ exp "+" exp ::=[ exp • "⊕" exp ] ] Second derivation exp ::=[ exp "+" exp ::=[ exp • "⊕" exp ] ]
Reduce/reduce conflict on tokens $end, "+", "⊕": Reduce/reduce conflict on tokens $end, "+", "⊕":
@@ -1350,7 +1345,6 @@ State 7
3 exp: exp "+" exp • 3 exp: exp "+" exp •
Example exp "+" exp • Example exp "+" exp •
First derivation exp ::=[ exp "+" exp • ] First derivation exp ::=[ exp "+" exp • ]
Example exp "+" exp •
Second derivation exp ::=[ exp "+" exp • ] Second derivation exp ::=[ exp "+" exp • ]
Shift/reduce conflict on token "⊕": Shift/reduce conflict on token "⊕":
@@ -1358,7 +1352,6 @@ State 7
1 exp: exp • "⊕" exp 1 exp: exp • "⊕" exp
Example exp "+" exp • "⊕" exp Example exp "+" exp • "⊕" exp
First derivation exp ::=[ exp ::=[ exp "+" exp • ] "⊕" exp ] First derivation exp ::=[ exp ::=[ exp "+" exp • ] "⊕" exp ]
Example exp "+" exp • "⊕" exp
Second derivation exp ::=[ exp "+" exp ::=[ exp • "⊕" exp ] ] Second derivation exp ::=[ exp "+" exp ::=[ exp • "⊕" exp ] ]
@@ -1382,7 +1375,6 @@ State 8
1 exp: exp • "⊕" exp 1 exp: exp • "⊕" exp
Example exp "⊕" exp • "⊕" exp Example exp "⊕" exp • "⊕" exp
First derivation exp ::=[ exp ::=[ exp "⊕" exp • ] "⊕" exp ] First derivation exp ::=[ exp ::=[ exp "⊕" exp • ] "⊕" exp ]
Example exp "⊕" exp • "⊕" exp
Second derivation exp ::=[ exp "⊕" exp ::=[ exp • "⊕" exp ] ] Second derivation exp ::=[ exp "⊕" exp ::=[ exp • "⊕" exp ] ]
]]) ]])