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cex: label all the derivations by their initial action

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    input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
      Example: A b .
      First derivation
        a
        `-> A b .
      Second derivation
        a
        `-> A b
              `-> b .

to

    input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
      Example: A b .
      First reduce derivation
        a
        `-> A b .
      Second reduce derivation
        a
        `-> A b
              `-> b .

* src/counterexample.c (print_counterexample): here.
Compute the width of the labels to properly align the values.
* tests/conflicts.at, tests/counterexample.at, tests/diagnostics.at,
* tests/report.at: Adjust.
This commit is contained in:
Akim Demaille
2020-07-20 07:14:50 +02:00
parent b81229e1f9
commit b8c5e5609f
5 changed files with 163 additions and 134 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
src/counterexample.c
View File

@@ -26,6 +26,7 @@
#include <gl_linked_list.h> #include <gl_linked_list.h>
#include <gl_rbtreehash_list.h> #include <gl_rbtreehash_list.h>
#include <hash.h> #include <hash.h>
#include <mbswidth.h>
#include <stdlib.h> #include <stdlib.h>
#include <textstyle.h> #include <textstyle.h>
#include <time.h> #include <time.h>
@@ -112,15 +113,37 @@ free_counterexample (counterexample *cex)
free (cex); free (cex);
} }
static int max (int a, int b)
{
return a < b ? b : a;
}
static void static void
print_counterexample (const counterexample *cex, FILE *out, const char *prefix) print_counterexample (const counterexample *cex, FILE *out, const char *prefix)
{ {
const bool flat = getenv ("YYFLAT"); const bool flat = getenv ("YYFLAT");
fprintf (out, flat ? " %s%-20s " : " %s%s: ", const char *example1_label
prefix, cex->unifying ? _("Example") : _("First example")); = cex->unifying ? _("Example") : _("First example");
const char *example2_label
= cex->unifying ? _("Example") : _("Second example");
const char *deriv1_label
= cex->shift_reduce ? _("Shift derivation") : _("First reduce derivation");
const char *deriv2_label
= cex->shift_reduce ? _("Reduce derivation") : _("Second reduce derivation");
const int width =
max (max (mbswidth (example1_label, 0), mbswidth (example2_label, 0)),
max (mbswidth (deriv1_label, 0), mbswidth (deriv2_label, 0)));
if (flat)
fprintf (out, " %s%s%*s ", prefix,
example1_label, width - mbswidth (example1_label, 0), "");
else
fprintf (out, " %s%s: ", prefix, example1_label);
derivation_print_leaves (cex->d1, out); derivation_print_leaves (cex->d1, out);
fprintf (out, flat ? " %s%-20s " : " %s%s", if (flat)
prefix, cex->shift_reduce ? _("Shift derivation") : _("First derivation")); fprintf (out, " %s%s%*s ", prefix,
deriv1_label, width - mbswidth (deriv1_label, 0), "");
else
fprintf (out, " %s%s", prefix, deriv1_label);
derivation_print (cex->d1, out, prefix); derivation_print (cex->d1, out, prefix);
// If we output to the terminal (via stderr) and we have color // If we output to the terminal (via stderr) and we have color
@@ -128,12 +151,18 @@ print_counterexample (const counterexample *cex, FILE *out, const char *prefix)
// to see the differences. // to see the differences.
if (!cex->unifying || is_styled (stderr)) if (!cex->unifying || is_styled (stderr))
{ {
fprintf (out, flat ? " %s%-20s " : " %s%s: ", if (flat)
prefix, cex->unifying ? _("Example") : _("Second example")); fprintf (out, " %s%s%*s ", prefix,
example2_label, width - mbswidth (example2_label, 0), "");
else
fprintf (out, " %s%s: ", prefix, example2_label);
derivation_print_leaves (cex->d2, out); derivation_print_leaves (cex->d2, out);
} }
fprintf (out, flat ? " %s%-20s " : " %s%s", if (flat)
prefix, cex->shift_reduce ? _("Reduce derivation") : _("Second derivation")); fprintf (out, " %s%s%*s ", prefix,
deriv2_label, width - mbswidth (deriv2_label, 0), "");
else
fprintf (out, " %s%s", prefix, deriv2_label);
derivation_print (cex->d2, out, prefix); derivation_print (cex->d2, out, prefix);
if (out != stderr) if (out != stderr)

12
tests/conflicts.at
View File

@@ -1213,11 +1213,11 @@ State 1
3 num: '0' . 3 num: '0' .
4 id: '0' . 4 id: '0' .
Example: '0' . Example: '0' .
First derivation First reduce derivation
exp exp
`-> num `-> num
`-> '0' . `-> '0' .
Second derivation Second reduce derivation
exp exp
`-> id `-> id
`-> '0' . `-> '0' .
@@ -1807,10 +1807,10 @@ State 5
8 reported_conflicts: 'a' . 8 reported_conflicts: 'a' .
9 reported_conflicts: 'a' . 9 reported_conflicts: 'a' .
Example: 'a' . Example: 'a' .
First derivation First reduce derivation
reported_conflicts reported_conflicts
`-> 'a' . `-> 'a' .
Second derivation Second reduce derivation
reported_conflicts reported_conflicts
`-> 'a' . `-> 'a' .
@@ -1997,11 +1997,11 @@ AT_CHECK([[cat input.output | sed -n '/^State 0$/,/^State 1$/p']], 0,
12 empty_c2: . %empty 12 empty_c2: . %empty
13 empty_c3: . %empty 13 empty_c3: . %empty
Example: . 'c' Example: . 'c'
First derivation First reduce derivation
start start
`-> empty_c2 'c' `-> empty_c2 'c'
`-> . `-> .
Second derivation Second reduce derivation
start start
`-> empty_c3 'c' `-> empty_c3 'c'
`-> . `-> .

228
tests/counterexample.at
View File

@@ -68,9 +68,9 @@ input.y:4.4: warning: rule useless in parser due to conflicts [-Wother]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token B [-Wcounterexamples] input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example A . B C Example A . B C
Shift derivation s -> [ y -> [ A . B ] c -> [ C ] ] Shift derivation s -> [ y -> [ A . B ] c -> [ C ] ]
Reduce derivation s -> [ a -> [ A . ] x -> [ B C ] ] Reduce derivation s -> [ a -> [ A . ] x -> [ B 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]
]]) ]])
@@ -125,13 +125,13 @@ input.y:6.4: warning: rule useless in parser due to conflicts [-Wother]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token B [-Wcounterexamples] input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example A . B C Example A . B C
Shift derivation s -> [ ac -> [ A ac -> [ b -> [ . B ] ] C ] ] Shift derivation s -> [ ac -> [ A ac -> [ b -> [ . B ] ] C ] ]
Reduce derivation s -> [ a -> [ A . ] bc -> [ B C ] ] Reduce derivation s -> [ a -> [ A . ] bc -> [ B C ] ]
input.y: warning: shift/reduce conflict on token B [-Wcounterexamples] input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example A A . B B C C Example A A . B B C C
Shift derivation s -> [ ac -> [ A ac -> [ A ac -> [ b -> [ . b -> [ B B ] ] ] C ] C ] ] Shift derivation s -> [ ac -> [ A ac -> [ A ac -> [ b -> [ . b -> [ B B ] ] ] C ] C ] ]
Reduce derivation s -> [ a -> [ A a -> [ A . ] ] bc -> [ B bc -> [ B C ] C ] ] Reduce derivation s -> [ a -> [ A a -> [ A . ] ] bc -> [ B bc -> [ B C ] 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]
]]) ]])
@@ -187,14 +187,14 @@ input.y:5.4-9: warning: rule useless in parser due to conflicts [-Wother]
]], ]],
[[input.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr] [[input.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token B [-Wcounterexamples] input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example A . B Example A . B
Shift derivation s -> [ A xby -> [ . B ] ] Shift derivation s -> [ A xby -> [ . B ] ]
Reduce derivation s -> [ ax -> [ A x -> [ . ] ] by -> [ B y -> [ ] ] ] Reduce derivation s -> [ ax -> [ A x -> [ . ] ] by -> [ B y -> [ ] ] ]
input.y: warning: shift/reduce conflict on token B [-Wcounterexamples] input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
First example A X . B Y $end First example A X . B Y $end
Shift derivation $accept -> [ s -> [ A xby -> [ X xby -> [ . B ] Y ] ] $end ] Shift derivation $accept -> [ s -> [ A xby -> [ X xby -> [ . B ] Y ] ] $end ]
Second example A X . B y $end Second example A X . B y $end
Reduce derivation $accept -> [ s -> [ ax -> [ A x -> [ X x -> [ . ] ] ] by -> [ B y ] ] $end ] Reduce derivation $accept -> [ s -> [ ax -> [ A x -> [ X x -> [ . ] ] ] by -> [ B y ] ] $end ]
input.y:5.4-9: warning: rule useless in parser due to conflicts [-Wother] input.y:5.4-9: warning: rule useless in parser due to conflicts [-Wother]
]]) ]])
@@ -238,10 +238,10 @@ input.y:6.4: warning: rule useless in parser due to conflicts [-Wother]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token C [-Wcounterexamples] input.y: warning: shift/reduce conflict on token C [-Wcounterexamples]
First example B . C $end First example B . C $end
Shift derivation $accept -> [ g -> [ x -> [ bc -> [ B . C ] ] ] $end ] Shift derivation $accept -> [ g -> [ x -> [ bc -> [ B . C ] ] ] $end ]
Second example B . C D $end Second example B . C D $end
Reduce derivation $accept -> [ g -> [ x -> [ b -> [ B . ] cd -> [ C D ] ] ] $end ] Reduce derivation $accept -> [ g -> [ x -> [ b -> [ B . ] cd -> [ C D ] ] ] $end ]
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]
]]) ]])
@@ -283,10 +283,10 @@ input.y: warning: shift/reduce conflict on token A [-Wcounterexamples]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token A [-Wcounterexamples] input.y: warning: shift/reduce conflict on token A [-Wcounterexamples]
First example A . A B $end First example A . A B $end
Shift derivation $accept -> [ s -> [ t -> [ y -> [ A . A B ] ] ] $end ] Shift derivation $accept -> [ s -> [ t -> [ y -> [ A . A B ] ] ] $end ]
Second example A . A $end Second example A . A $end
Reduce derivation $accept -> [ s -> [ s -> [ t -> [ x -> [ A . ] ] ] t -> [ x -> [ A ] ] ] $end ] Reduce derivation $accept -> [ s -> [ s -> [ t -> [ x -> [ A . ] ] ] t -> [ x -> [ A ] ] ] $end ]
]]) ]])
AT_CLEANUP AT_CLEANUP
@@ -342,14 +342,14 @@ input.y:8.4: warning: rule useless in parser due to conflicts [-Wother]
]], ]],
[[input.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr] [[input.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token A [-Wcounterexamples] input.y: warning: shift/reduce conflict on token A [-Wcounterexamples]
Example b . A X X Y Example b . A X X Y
Shift derivation a -> [ s -> [ b . xx -> [ A X X ] y -> [ Y ] ] ] Shift derivation a -> [ s -> [ b . xx -> [ A X X ] y -> [ Y ] ] ]
Reduce derivation a -> [ r -> [ b . ] t -> [ A x -> [ X ] xy -> [ X Y ] ] ] Reduce derivation a -> [ r -> [ b . ] t -> [ A x -> [ X ] xy -> [ X Y ] ] ]
input.y: warning: shift/reduce conflict on token X [-Wcounterexamples] input.y: warning: shift/reduce conflict on token X [-Wcounterexamples]
First example A X . X First example A X . X
Shift derivation a -> [ t -> [ A xx -> [ X . X ] ] ] Shift derivation a -> [ t -> [ A xx -> [ X . X ] ] ]
Second example X . X xy Second example X . X xy
Reduce derivation a -> [ x -> [ X . ] t -> [ X xy ] ] Reduce derivation a -> [ x -> [ X . ] t -> [ X xy ] ]
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]
input.y:8.4: warning: rule useless in parser due to conflicts [-Wother] input.y:8.4: warning: rule useless in parser due to conflicts [-Wother]
]]) ]])
@@ -373,10 +373,10 @@ AT_BISON_CHECK_CEX(
[[input.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr] [[input.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr]
input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
Example: A b . Example: A b .
First derivation First reduce derivation
a a
`-> A b . `-> A b .
Second derivation Second reduce derivation
a a
`-> A b `-> A b
`-> b . `-> b .
@@ -384,9 +384,9 @@ input.y:4.9: warning: rule useless in parser due to conflicts [-Wother]
]], ]],
[[input.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr] [[input.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr]
input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
Example A b . Example A b .
First derivation a -> [ A b . ] First reduce derivation a -> [ A b . ]
Second derivation a -> [ A b -> [ b . ] ] Second reduce 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]
]]) ]])
@@ -410,13 +410,13 @@ AT_BISON_CHECK_CEX(
[[input.y: warning: 2 reduce/reduce conflicts [-Wconflicts-rr] [[input.y: warning: 2 reduce/reduce conflicts [-Wconflicts-rr]
input.y: warning: reduce/reduce conflict on tokens A, C [-Wcounterexamples] input.y: warning: reduce/reduce conflict on tokens A, C [-Wcounterexamples]
First example: D . A $end First example: D . A $end
First derivation First reduce derivation
$accept $accept
`-> s $end `-> s $end
`-> a A `-> a A
`-> D . `-> D .
Second example: B D . A $end Second example: B D . A $end
Second derivation Second reduce derivation
$accept $accept
`-> s $end `-> s $end
`-> B b A `-> B b A
@@ -425,10 +425,10 @@ input.y:5.4: warning: rule useless in parser due to conflicts [-Wother]
]], ]],
[[input.y: warning: 2 reduce/reduce conflicts [-Wconflicts-rr] [[input.y: warning: 2 reduce/reduce conflicts [-Wconflicts-rr]
input.y: warning: reduce/reduce conflict on tokens A, C [-Wcounterexamples] input.y: warning: reduce/reduce conflict on tokens A, C [-Wcounterexamples]
First example D . A $end First example D . A $end
First derivation $accept -> [ s -> [ a -> [ D . ] A ] $end ] First reduce derivation $accept -> [ s -> [ a -> [ D . ] A ] $end ]
Second example B D . A $end Second example B D . A $end
Second derivation $accept -> [ s -> [ B b -> [ D . ] A ] $end ] Second reduce derivation $accept -> [ s -> [ B b -> [ D . ] A ] $end ]
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]
]]) ]])
@@ -469,10 +469,10 @@ input.y:4.4-6: warning: rule useless in parser due to conflicts [-Wother]
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token J [-Wcounterexamples] input.y: warning: shift/reduce conflict on token J [-Wcounterexamples]
time limit exceeded: XXX time limit exceeded: XXX
First example H i . J K $end First example H i . J K $end
Shift derivation $accept -> [ a -> [ H i -> [ i . J K ] ] $end ] Shift derivation $accept -> [ a -> [ H i -> [ i . J K ] ] $end ]
Second example H i . J $end Second example H i . J $end
Reduce derivation $accept -> [ s -> [ a -> [ H i . ] J ] $end ] Reduce derivation $accept -> [ s -> [ a -> [ H i . ] J ] $end ]
input.y:4.4-6: warning: rule useless in parser due to conflicts [-Wother] input.y:4.4-6: warning: rule useless in parser due to conflicts [-Wother]
]]) ]])
@@ -528,13 +528,13 @@ input.y:5.4: warning: rule useless in parser due to conflicts [-Wother]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token B [-Wcounterexamples] input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example N A . B C Example N A . B C
Shift derivation s -> [ n -> [ N b -> [ A . B C ] ] ] Shift derivation s -> [ n -> [ N b -> [ A . B C ] ] ]
Reduce derivation s -> [ n -> [ N a -> [ A . ] B ] C ] Reduce derivation s -> [ n -> [ N a -> [ A . ] B ] C ]
input.y: warning: shift/reduce conflict on token B [-Wcounterexamples] input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example N N A . B D C Example N N A . B D C
Shift derivation s -> [ n -> [ N n -> [ N b -> [ A . B D ] ] C ] ] Shift derivation s -> [ n -> [ N n -> [ N b -> [ A . B D ] ] C ] ]
Reduce derivation s -> [ n -> [ N n -> [ N a -> [ A . ] B ] D ] C ] Reduce derivation s -> [ n -> [ N n -> [ N a -> [ A . ] B ] D ] 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]
]]) ]])
@@ -563,12 +563,12 @@ AT_BISON_CHECK_CEX(
[[input.y: warning: 4 reduce/reduce conflicts [-Wconflicts-rr] [[input.y: warning: 4 reduce/reduce conflicts [-Wconflicts-rr]
input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples] input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples]
Example: B . b c Example: B . b c
First derivation First reduce derivation
S S
`-> B C `-> B C
`-> A b A `-> A c A `-> A b A `-> A c A
`-> B . `-> %empty `-> %empty `-> %empty `-> B . `-> %empty `-> %empty `-> %empty
Second derivation Second reduce derivation
S S
`-> B C `-> B C
`-> A c A `-> A c A
@@ -577,12 +577,12 @@ input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples]
`-> . `-> %empty `-> . `-> %empty
input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples] input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples]
Example: C . c b Example: C . c b
First derivation First reduce derivation
S S
`-> C B `-> C B
`-> A c A `-> A b A `-> A c A `-> A b A
`-> C . `-> %empty `-> %empty `-> %empty `-> C . `-> %empty `-> %empty `-> %empty
Second derivation Second reduce derivation
S S
`-> C B `-> C B
`-> A b A `-> A b A
@@ -592,13 +592,13 @@ input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples]
]], ]],
[[input.y: warning: 4 reduce/reduce conflicts [-Wconflicts-rr] [[input.y: warning: 4 reduce/reduce conflicts [-Wconflicts-rr]
input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples] input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples]
Example B . b c Example B . b c
First derivation S -> [ B -> [ A -> [ B . ] b A -> [ ] ] C -> [ A -> [ ] c A -> [ ] ] ] First reduce derivation S -> [ B -> [ A -> [ B . ] b A -> [ ] ] C -> [ A -> [ ] c A -> [ ] ] ]
Second derivation S -> [ B C -> [ A -> [ B -> [ A -> [ . ] b A -> [ ] ] ] c A -> [ ] ] ] Second reduce derivation S -> [ B C -> [ A -> [ B -> [ A -> [ . ] b A -> [ ] ] ] c A -> [ ] ] ]
input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples] input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples]
Example C . c b Example C . c b
First derivation S -> [ C -> [ A -> [ C . ] c A -> [ ] ] B -> [ A -> [ ] b A -> [ ] ] ] First reduce derivation S -> [ C -> [ A -> [ C . ] c A -> [ ] ] B -> [ A -> [ ] b A -> [ ] ] ]
Second derivation S -> [ C B -> [ A -> [ C -> [ A -> [ . ] c A -> [ ] ] ] b A -> [ ] ] ] Second reduce derivation S -> [ C B -> [ A -> [ C -> [ A -> [ . ] c A -> [ ] ] ] b A -> [ ] ] ]
]]) ]])
AT_CLEANUP AT_CLEANUP
@@ -623,13 +623,13 @@ AT_BISON_CHECK_CEX(
input.y: warning: 6 reduce/reduce conflicts [-Wconflicts-rr] input.y: warning: 6 reduce/reduce conflicts [-Wconflicts-rr]
input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
First example: . c A A $end First example: . c A A $end
First derivation First reduce derivation
$accept $accept
`-> a $end `-> a $end
`-> b d `-> b d
`-> . `-> c A A `-> . `-> c A A
Second example: . c A A $end Second example: . c A A $end
Second derivation Second reduce derivation
$accept $accept
`-> a $end `-> a $end
`-> c d `-> c d
@@ -637,7 +637,7 @@ input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
time limit exceeded: XXX time limit exceeded: XXX
First example: b . c A A $end First example: b . c A A $end
First derivation First reduce derivation
$accept $accept
`-> a $end `-> a $end
`-> b d `-> b d
@@ -645,7 +645,7 @@ time limit exceeded: XXX
`-> b d `-> b d
`-> . `-> c A A `-> . `-> c A A
Second example: b . A $end Second example: b . A $end
Second derivation Second reduce derivation
$accept $accept
`-> a $end `-> a $end
`-> b d `-> b d
@@ -654,7 +654,7 @@ time limit exceeded: XXX
input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
time limit exceeded: XXX time limit exceeded: XXX
First example: c . c A A $end First example: c . c A A $end
First derivation First reduce derivation
$accept $accept
`-> a $end `-> a $end
`-> c d `-> c d
@@ -662,7 +662,7 @@ time limit exceeded: XXX
`-> b d `-> b d
`-> . `-> c A A `-> . `-> c A A
Second example: c . A $end Second example: c . A $end
Second derivation Second reduce derivation
$accept $accept
`-> a $end `-> a $end
`-> c d `-> c d
@@ -687,7 +687,7 @@ time limit exceeded: XXX
`-> . `-> c A A `-> . `-> c A A
input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
First example: b c . c A A $end First example: b c . c A A $end
First derivation First reduce derivation
$accept $accept
`-> a $end `-> a $end
`-> b d `-> b d
@@ -697,7 +697,7 @@ input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
`-> b d `-> b d
`-> . `-> c A A `-> . `-> c A A
Second example: b c . A $end Second example: b c . A $end
Second derivation Second reduce derivation
$accept $accept
`-> a $end `-> a $end
`-> b d `-> b d
@@ -722,19 +722,19 @@ input.y: warning: shift/reduce conflict on token A [-Wcounterexamples]
`-> . `-> .
input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
Example: b d . Example: b d .
First derivation First reduce derivation
a a
`-> b d . `-> b d .
Second derivation Second reduce derivation
a a
`-> b d `-> b d
`-> d . `-> d .
input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
Example: c d . Example: c d .
First derivation First reduce derivation
a a
`-> c d . `-> c d .
Second derivation Second reduce derivation
a a
`-> c d `-> c d
`-> d . `-> d .
@@ -744,46 +744,46 @@ input.y:6.15: warning: rule useless in parser due to conflicts [-Wother]
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: 6 reduce/reduce conflicts [-Wconflicts-rr] input.y: warning: 6 reduce/reduce conflicts [-Wconflicts-rr]
input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
First example . c A A $end First example . c A A $end
First derivation $accept -> [ a -> [ b -> [ . ] d -> [ c A A ] ] $end ] First reduce derivation $accept -> [ a -> [ b -> [ . ] d -> [ c A A ] ] $end ]
Second example . c A A $end Second example . c A A $end
Second derivation $accept -> [ a -> [ c -> [ . ] d -> [ c A A ] ] $end ] Second reduce derivation $accept -> [ a -> [ c -> [ . ] d -> [ c A A ] ] $end ]
input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
time limit exceeded: XXX time limit exceeded: XXX
First example b . c A A $end First example b . c A A $end
First derivation $accept -> [ a -> [ b d -> [ a -> [ b -> [ . ] d -> [ c A A ] ] ] ] $end ] First reduce derivation $accept -> [ a -> [ b d -> [ a -> [ b -> [ . ] d -> [ c A A ] ] ] ] $end ]
Second example b . A $end Second example b . A $end
Second derivation $accept -> [ a -> [ b d -> [ c -> [ . ] A ] ] $end ] Second reduce derivation $accept -> [ a -> [ b d -> [ c -> [ . ] A ] ] $end ]
input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
time limit exceeded: XXX time limit exceeded: XXX
First example c . c A A $end First example c . c A A $end
First derivation $accept -> [ a -> [ c d -> [ a -> [ b -> [ . ] d -> [ c A A ] ] ] ] $end ] First reduce derivation $accept -> [ a -> [ c d -> [ a -> [ b -> [ . ] d -> [ c A A ] ] ] ] $end ]
Second example c . A $end Second example c . A $end
Second derivation $accept -> [ a -> [ c d -> [ c -> [ . ] A ] ] $end ] Second reduce derivation $accept -> [ a -> [ c d -> [ c -> [ . ] A ] ] $end ]
input.y: warning: shift/reduce conflict on token A [-Wcounterexamples] input.y: warning: shift/reduce conflict on token A [-Wcounterexamples]
time limit exceeded: XXX time limit exceeded: XXX
First example b c . A First example b c . A
Shift derivation a -> [ b d -> [ c . A ] ] Shift derivation a -> [ b d -> [ c . A ] ]
Second example b c . c A A $end Second example b c . c A A $end
Reduce derivation $accept -> [ a -> [ b d -> [ a -> [ c d -> [ a -> [ b -> [ . ] d -> [ c A A ] ] ] ] ] ] $end ] Reduce derivation $accept -> [ a -> [ b d -> [ a -> [ c d -> [ a -> [ b -> [ . ] d -> [ c A A ] ] ] ] ] ] $end ]
input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
First example b c . c A A $end First example b c . c A A $end
First derivation $accept -> [ a -> [ b d -> [ a -> [ c d -> [ a -> [ b -> [ . ] d -> [ c A A ] ] ] ] ] ] $end ] First reduce derivation $accept -> [ a -> [ b d -> [ a -> [ c d -> [ a -> [ b -> [ . ] d -> [ c A A ] ] ] ] ] ] $end ]
Second example b c . A $end Second example b c . A $end
Second derivation $accept -> [ a -> [ b d -> [ a -> [ c d -> [ c -> [ . ] A ] ] ] ] $end ] Second reduce derivation $accept -> [ a -> [ b d -> [ a -> [ c d -> [ c -> [ . ] A ] ] ] ] $end ]
input.y: warning: shift/reduce conflict on token A [-Wcounterexamples] input.y: warning: shift/reduce conflict on token A [-Wcounterexamples]
First example b c . A First example b c . A
Shift derivation a -> [ b d -> [ c . A ] ] Shift derivation a -> [ b d -> [ c . A ] ]
Second example b c . A $end Second example b c . A $end
Reduce derivation $accept -> [ a -> [ b d -> [ a -> [ c d -> [ c -> [ . ] A ] ] ] ] $end ] Reduce derivation $accept -> [ a -> [ b d -> [ a -> [ c d -> [ c -> [ . ] A ] ] ] ] $end ]
input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
Example b d . Example b d .
First derivation a -> [ b d . ] First reduce derivation a -> [ b d . ]
Second derivation a -> [ b d -> [ d . ] ] Second reduce derivation a -> [ b d -> [ d . ] ]
input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples] input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
Example c d . Example c d .
First derivation a -> [ c d . ] First reduce derivation a -> [ c d . ]
Second derivation a -> [ c d -> [ d . ] ] Second reduce 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]
input.y:6.15: warning: rule useless in parser due to conflicts [-Wother] input.y:6.15: warning: rule useless in parser due to conflicts [-Wother]
]]) ]])
@@ -824,9 +824,9 @@ input.y:5.13-15: warning: rule useless in parser due to conflicts [-Wother]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token J [-Wcounterexamples] input.y: warning: shift/reduce conflict on token J [-Wcounterexamples]
Example H i J . J J Example H i J . J J
Shift derivation s -> [ a -> [ H i J . J ] J ] Shift derivation s -> [ a -> [ H i J . J ] J ]
Reduce derivation s -> [ a -> [ H i -> [ i J . ] J J ] ] Reduce derivation s -> [ a -> [ H i -> [ 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]
]]) ]])
@@ -868,9 +868,9 @@ input.y: warning: shift/reduce conflict on token D [-Wcounterexamples]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token D [-Wcounterexamples] input.y: warning: shift/reduce conflict on token D [-Wcounterexamples]
Example A a . D Example A a . D
Shift derivation s -> [ A a d -> [ . D ] ] Shift derivation s -> [ A a d -> [ . D ] ]
Reduce derivation s -> [ A a a -> [ b -> [ c -> [ . ] ] ] d -> [ D ] ] Reduce derivation s -> [ A a a -> [ b -> [ c -> [ . ] ] ] d -> [ D ] ]
]]) ]])
AT_CLEANUP AT_CLEANUP
@@ -913,10 +913,10 @@ input.y: warning: shift/reduce conflict on token D [-Wcounterexamples]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token D [-Wcounterexamples] input.y: warning: shift/reduce conflict on token D [-Wcounterexamples]
First example A a . D $end First example A a . D $end
Shift derivation $accept -> [ s -> [ A a d -> [ . D ] ] $end ] Shift derivation $accept -> [ s -> [ A a d -> [ . D ] ] $end ]
Second example A a . D E $end Second example A a . D E $end
Reduce derivation $accept -> [ s -> [ A a a -> [ b -> [ c -> [ . ] ] ] d -> [ D ] E ] $end ] Reduce derivation $accept -> [ s -> [ A a a -> [ b -> [ c -> [ . ] ] ] d -> [ D ] E ] $end ]
]]) ]])
AT_CLEANUP AT_CLEANUP

4
tests/diagnostics.at
View File

@@ -619,7 +619,7 @@ input.y:31.4: <warning>warning:</warning> empty rule without %empty [<warning>-W
| <warning>^</warning> | <warning>^</warning>
| <fixit-insert>%empty</fixit-insert> | <fixit-insert>%empty</fixit-insert>
input.y: <error>error:</error> reduce/reduce conflicts: 1 found, 0 expected 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>] 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> 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 First reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0> <cex-0><cex-step>exp</cex-step></cex-0>
@@ -629,7 +629,7 @@ input.y: <warning>warning:</warning> reduce/reduce conflict on token "X" [<warni
<cex-3><cex-step> ↳ <cex-leaf>"X"</cex-leaf><cex-dot> •</cex-dot></cex-step></cex-3><cex-7><cex-step> ↳ <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> ↳ <cex-leaf>"X"</cex-leaf></cex-step></cex-14> <cex-3><cex-step> ↳ <cex-leaf>"X"</cex-leaf><cex-dot> •</cex-dot></cex-step></cex-3><cex-7><cex-step> ↳ <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> ↳ <cex-leaf>"X"</cex-leaf></cex-step></cex-14>
<cex-8><cex-step> ↳ <cex-9><cex-step>x2</cex-step></cex-9></cex-step></cex-8><cex-11><cex-step> ↳ <cex-leaf>"quuux"</cex-leaf></cex-step></cex-11> <cex-8><cex-step> ↳ <cex-9><cex-step>x2</cex-step></cex-9></cex-step></cex-8><cex-11><cex-step> ↳ <cex-leaf>"quuux"</cex-leaf></cex-step></cex-11>
<cex-9><cex-step> ↳ <cex-10><cex-step>x3</cex-step></cex-10></cex-step></cex-9> <cex-9><cex-step> ↳ <cex-10><cex-step>x3</cex-step></cex-10></cex-step></cex-9>
<cex-10><cex-step> ↳ <cex-leaf>"X"</cex-leaf></cex-step></cex-10> <cex-10><cex-step> ↳ <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> 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 Second reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0> <cex-0><cex-step>exp</cex-step></cex-0>

8
tests/report.at
View File

@@ -1549,10 +1549,10 @@ input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
↳ exp "+" exp • ↳ exp "+" exp •
input.y: warning: reduce/reduce conflict on tokens $end, "+", "⊕" [-Wcounterexamples] input.y: warning: reduce/reduce conflict on tokens $end, "+", "⊕" [-Wcounterexamples]
Example: exp "+" exp • Example: exp "+" exp •
First derivation First reduce derivation
exp exp
↳ exp "+" exp • ↳ exp "+" exp •
Second derivation Second reduce derivation
exp exp
↳ exp "+" exp • ↳ exp "+" exp •
input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples] input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
@@ -1756,10 +1756,10 @@ State 7
2 exp: exp "+" exp • 2 exp: exp "+" exp •
3 exp: exp "+" exp • 3 exp: exp "+" exp •
Example: exp "+" exp • Example: exp "+" exp •
First derivation First reduce derivation
exp exp
↳ exp "+" exp • ↳ exp "+" exp •
Second derivation Second reduce derivation
exp exp
↳ exp "+" exp • ↳ exp "+" exp •