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cex: improve readability of the subsections

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Now that the derivation is no longer printed on one line, aligning the
example and the derivation is no longer useful.  It can actually be
harmful, as it makes the overall structure less clear.

* src/derivation.h, src/derivation.c (derivation_print_leaves): Remove
the `prefix` argument.
* src/counterexample.c (print_counterexample): Put the example next to
its label.
* tests/conflicts.at, tests/counterexample.at, tests/diagnostics.at,
* tests/report.at: Adjust.
This commit is contained in:
Akim Demaille
2020-07-20 07:03:39 +02:00
parent 815a76f558
commit b81229e1f9
7 changed files with 76 additions and 77 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/counterexample.c
View File

@@ -116,9 +116,9 @@ static void
print_counterexample (const counterexample *cex, FILE *out, const char *prefix)
{
const bool flat = getenv ("YYFLAT");
fprintf (out, " %s%-20s ",
fprintf (out, flat ? " %s%-20s " : " %s%s: ",
prefix, cex->unifying ? _("Example") : _("First example"));
derivation_print_leaves (cex->d1, out, prefix);
derivation_print_leaves (cex->d1, out);
fprintf (out, flat ? " %s%-20s " : " %s%s",
prefix, cex->shift_reduce ? _("Shift derivation") : _("First derivation"));
derivation_print (cex->d1, out, prefix);
@@ -128,9 +128,9 @@ print_counterexample (const counterexample *cex, FILE *out, const char *prefix)
// to see the differences.
if (!cex->unifying || is_styled (stderr))
{
fprintf (out, " %s%-20s ",
fprintf (out, flat ? " %s%-20s " : " %s%s: ",
prefix, cex->unifying ? _("Example") : _("Second example"));
derivation_print_leaves (cex->d2, out, prefix);
derivation_print_leaves (cex->d2, out);
}
fprintf (out, flat ? " %s%-20s " : " %s%s",
prefix, cex->shift_reduce ? _("Reduce derivation") : _("Second derivation"));

3
src/derivation.c
View File

@@ -428,10 +428,9 @@ derivation_print_flat (const derivation *deriv, FILE *out, const char *prefix)
}
void
derivation_print_leaves (const derivation *deriv, FILE *out, const char *prefix)
derivation_print_leaves (const derivation *deriv, FILE *out)
{
int counter = 0;
fputs (prefix, out);
derivation_print_flat_impl ((derivation *)deriv, out, true, &counter, "");
fputc ('\n', out);
}

2
src/derivation.h
View File

@@ -64,7 +64,7 @@ static inline derivation *derivation_new_leaf (symbol_number sym)
// Number of symbols.
size_t derivation_size (const derivation *deriv);
void derivation_print (const derivation *deriv, FILE *out, const char *prefix);
void derivation_print_leaves (const derivation *deriv, FILE *out, const char *prefix);
void derivation_print_leaves (const derivation *deriv, FILE *out);
void derivation_free (derivation *deriv);
void derivation_retain (derivation *deriv);

16
tests/conflicts.at
View File

@@ -864,7 +864,7 @@ State 5
shift/reduce conflict on token OP:
1 exp: exp OP exp .
1 exp: exp . OP exp
Example exp OP exp . OP exp
Example: exp OP exp . OP exp
Shift derivation
exp
`-> exp OP exp
@@ -1212,7 +1212,7 @@ State 1
reduce/reduce conflict on token $end:
3 num: '0' .
4 id: '0' .
Example '0' .
Example: '0' .
First derivation
exp
`-> num
@@ -1767,12 +1767,12 @@ State 4
shift/reduce conflict on token 'a':
10 reported_conflicts: . %empty
8 reported_conflicts: . 'a'
First example resolved_conflict . 'a' 'a'
First example: resolved_conflict . 'a' 'a'
Shift derivation
start
`-> resolved_conflict reported_conflicts 'a'
`-> . 'a'
Second example resolved_conflict . 'a'
Second example: resolved_conflict . 'a'
Reduce derivation
start
`-> resolved_conflict reported_conflicts 'a'
@@ -1781,12 +1781,12 @@ State 4
shift/reduce conflict on token 'a':
10 reported_conflicts: . %empty
9 reported_conflicts: . 'a'
First example resolved_conflict . 'a' 'a'
First example: resolved_conflict . 'a' 'a'
Shift derivation
start
`-> resolved_conflict reported_conflicts 'a'
`-> . 'a'
Second example resolved_conflict . 'a'
Second example: resolved_conflict . 'a'
Reduce derivation
start
`-> resolved_conflict reported_conflicts 'a'
@@ -1806,7 +1806,7 @@ State 5
reduce/reduce conflict on token 'a':
8 reported_conflicts: 'a' .
9 reported_conflicts: 'a' .
Example 'a' .
Example: 'a' .
First derivation
reported_conflicts
`-> 'a' .
@@ -1996,7 +1996,7 @@ AT_CHECK([[cat input.output | sed -n '/^State 0$/,/^State 1$/p']], 0,
reduce/reduce conflict on token 'c':
12 empty_c2: . %empty
13 empty_c3: . %empty
Example . 'c'
Example: . 'c'
First derivation
start
`-> empty_c2 'c'

80
tests/counterexample.at
View File

@@ -55,7 +55,7 @@ y: A | A B;
AT_BISON_CHECK_CEX(
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example A . B C
Example: A . B C
Shift derivation
s
`-> y c
@@ -95,7 +95,7 @@ bc: B bc C | B C;
AT_BISON_CHECK_CEX(
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example A . B C
Example: A . B C
Shift derivation
s
`-> ac
@@ -107,7 +107,7 @@ input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
`-> a bc
`-> A . `-> B C
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
@@ -157,7 +157,7 @@ xby: B | X xby Y;
AT_BISON_CHECK_CEX(
[[input.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example A . B
Example: A . B
Shift derivation
s
`-> A xby
@@ -168,14 +168,14 @@ input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
`-> A x `-> B y
`-> . `-> %empty
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 $end
`-> A xby
`-> X xby Y
`-> . B
Second example A X . B y $end
Second example: A X . B y $end
Reduce derivation
$accept
`-> s $end
@@ -220,14 +220,14 @@ bc: B C;
AT_BISON_CHECK_CEX(
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token C [-Wcounterexamples]
First example B . C $end
First example: B . C $end
Shift derivation
$accept
`-> g $end
`-> x
`-> bc
`-> B . C
Second example B . C D $end
Second example: B . C D $end
Reduce derivation
$accept
`-> g $end
@@ -265,14 +265,14 @@ y: A A B;
AT_BISON_CHECK_CEX(
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
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 $end
`-> t
`-> y
`-> A . A B
Second example A . A $end
Second example: A . A $end
Reduce derivation
$accept
`-> s $end
@@ -314,7 +314,7 @@ y: Y;
AT_BISON_CHECK_CEX(
[[input.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr]
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
@@ -326,13 +326,13 @@ input.y: warning: shift/reduce conflict on token A [-Wcounterexamples]
`-> b . `-> A x xy
`-> X `-> X Y
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
Second example X . X xy
Second example: X . X xy
Reduce derivation
a
`-> x t
@@ -372,7 +372,7 @@ b : A | b;
AT_BISON_CHECK_CEX(
[[input.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr]
input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
Example A b .
Example: A b .
First derivation
a
`-> A b .
@@ -409,13 +409,13 @@ b: D;
AT_BISON_CHECK_CEX(
[[input.y: warning: 2 reduce/reduce conflicts [-Wconflicts-rr]
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 $end
`-> a A
`-> D .
Second example B D . A $end
Second example: B D . A $end
Second derivation
$accept
`-> s $end
@@ -452,13 +452,13 @@ AT_BISON_CHECK_CEX(
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token J [-Wcounterexamples]
time limit exceeded: XXX
First example H i . J K $end
First example: H i . J K $end
Shift derivation
$accept
`-> a $end
`-> H i
`-> i . J K
Second example H i . J $end
Second example: H i . J $end
Reduce derivation
$accept
`-> s $end
@@ -499,7 +499,7 @@ b: A B C | A B D;
AT_BISON_CHECK_CEX(
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example N A . B C
Example: N A . B C
Shift derivation
s
`-> n
@@ -511,7 +511,7 @@ input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
`-> N a B
`-> A .
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
@@ -562,7 +562,7 @@ C : A c A;
AT_BISON_CHECK_CEX(
[[input.y: warning: 4 reduce/reduce conflicts [-Wconflicts-rr]
input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples]
Example B . b c
Example: B . b c
First derivation
S
`-> B C
@@ -576,7 +576,7 @@ input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples]
`-> A b A
`-> . `-> %empty
input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples]
Example C . c b
Example: C . c b
First derivation
S
`-> C B
@@ -622,13 +622,13 @@ AT_BISON_CHECK_CEX(
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: 6 reduce/reduce conflicts [-Wconflicts-rr]
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 $end
`-> b d
`-> . `-> c A A
Second example . c A A $end
Second example: . c A A $end
Second derivation
$accept
`-> a $end
@@ -636,7 +636,7 @@ input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
`-> . `-> c A A
input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
time limit exceeded: XXX
First example b . c A A $end
First example: b . c A A $end
First derivation
$accept
`-> a $end
@@ -644,7 +644,7 @@ time limit exceeded: XXX
`-> a
`-> b d
`-> . `-> c A A
Second example b . A $end
Second example: b . A $end
Second derivation
$accept
`-> a $end
@@ -653,7 +653,7 @@ time limit exceeded: XXX
`-> .
input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
time limit exceeded: XXX
First example c . c A A $end
First example: c . c A A $end
First derivation
$accept
`-> a $end
@@ -661,7 +661,7 @@ time limit exceeded: XXX
`-> a
`-> b d
`-> . `-> c A A
Second example c . A $end
Second example: c . A $end
Second derivation
$accept
`-> a $end
@@ -670,12 +670,12 @@ time limit exceeded: XXX
`-> .
input.y: warning: shift/reduce conflict on token A [-Wcounterexamples]
time limit exceeded: XXX
First example b c . A
First example: b 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 $end
@@ -686,7 +686,7 @@ time limit exceeded: XXX
`-> b d
`-> . `-> c A A
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 $end
@@ -696,7 +696,7 @@ input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
`-> a
`-> b d
`-> . `-> c A A
Second example b c . A $end
Second example: b c . A $end
Second derivation
$accept
`-> a $end
@@ -706,12 +706,12 @@ input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
`-> c A
`-> .
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
Second example b c . A $end
Second example: b c . A $end
Reduce derivation
$accept
`-> a $end
@@ -721,7 +721,7 @@ input.y: warning: shift/reduce conflict on token A [-Wcounterexamples]
`-> c A
`-> .
input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
Example b d .
Example: b d .
First derivation
a
`-> b d .
@@ -730,7 +730,7 @@ input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
`-> b d
`-> d .
input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
Example c d .
Example: c d .
First derivation
a
`-> c d .
@@ -810,7 +810,7 @@ i: %empty | i J;
AT_BISON_CHECK_CEX(
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
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 J
@@ -854,7 +854,7 @@ d: D;
AT_BISON_CHECK_CEX(
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
input.y: warning: shift/reduce conflict on token D [-Wcounterexamples]
Example A a . D
Example: A a . D
Shift derivation
s
`-> A a d
@@ -896,13 +896,13 @@ d: D;
AT_BISON_CHECK_CEX(
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
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 $end
`-> A a d
`-> . D
Second example A a . D E $end
Second example: A a . D E $end
Reduce derivation
$accept
`-> s $end

20
tests/diagnostics.at
View File

@@ -536,45 +536,45 @@ exp
| "num"
]],
[1],
[[input.y: <error>error:</error> shift/reduce conflicts: 4 found, 0 expected
[[input.y: <error>error:</error> shift/reduce conflicts: 4 found, 0 expected
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>↳ <cex-leaf>exp</cex-leaf><cex-leaf> "+"</cex-leaf><cex-1><cex-step> exp</cex-step></cex-1></cex-step></cex-0>
<cex-0><cex-step>↳ <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> ↳ <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>↳ <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> ↳ <cex-leaf>exp</cex-leaf><cex-leaf> "+"</cex-leaf><cex-leaf> exp</cex-leaf><cex-dot> •</cex-dot></cex-step></cex-1>
<cex-1><cex-step> ↳ <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>↳ <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-0><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-1></cex-step></cex-0>
<cex-1><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-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>↳ <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> ↳ <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>
<cex-1><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-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>↳ <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-0><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-1></cex-step></cex-0>
<cex-1><cex-step> ↳ <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>↳ <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> ↳ <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>
<cex-1><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-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>↳ <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-0><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-1></cex-step></cex-0>
<cex-1><cex-step> ↳ <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
@@ -618,7 +618,7 @@ input.y:31.4: <warning>warning:</warning> empty rule without %empty [<warning>-W
31 | e2:
| <warning>^</warning>
| <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>]
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 derivation
@@ -628,7 +628,7 @@ input.y: <warning>warning:</warning> reduce/reduce conflict on token "X" [<warni
<cex-2><cex-step> ↳ <cex-3><cex-step>x3</cex-step></cex-3></cex-step></cex-2><cex-6><cex-step> ↳ <cex-7><cex-step>foo3</cex-step></cex-7></cex-step></cex-6><cex-13><cex-step> ↳ <cex-14><cex-step>x3</cex-step></cex-14></cex-step></cex-13>
<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-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>
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 derivation

24
tests/report.at
View File

@@ -1538,7 +1538,7 @@ AT_CHECK([LC_ALL="$locale" bison -fno-caret -o input.cc -rall -Wcex --graph=inpu
[[input.y: warning: 3 shift/reduce conflicts [-Wconflicts-sr]
input.y: warning: 3 reduce/reduce conflicts [-Wconflicts-rr]
input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
Example exp "+" exp • "⊕" exp
Example: exp "+" exp • "⊕" exp
Shift derivation
exp
↳ exp "+" exp
@@ -1548,7 +1548,7 @@ input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
↳ exp "⊕" exp
↳ exp "+" exp •
input.y: warning: reduce/reduce conflict on tokens $end, "+", "⊕" [-Wcounterexamples]
Example exp "+" exp •
Example: exp "+" exp •
First derivation
exp
↳ exp "+" exp •
@@ -1556,7 +1556,7 @@ input.y: warning: reduce/reduce conflict on tokens $end, "+", "⊕" [-Wcounterex
exp
↳ exp "+" exp •
input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
Example exp "+" exp • "⊕" exp
Example: exp "+" exp • "⊕" exp
Shift derivation
exp
↳ exp "+" exp
@@ -1566,7 +1566,7 @@ input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
↳ exp "⊕" exp
↳ exp "+" exp •
input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
Example exp "⊕" exp • "⊕" exp
Example: exp "⊕" exp • "⊕" exp
Shift derivation
exp
↳ exp "⊕" exp
@@ -1576,7 +1576,7 @@ input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
↳ exp "⊕" exp
↳ exp "⊕" exp •
input.y: warning: shift/reduce conflict on token "+" [-Wcounterexamples]
Example exp "⊕" exp • "+" exp
Example: exp "⊕" exp • "+" exp
Shift derivation
exp
↳ exp "⊕" exp
@@ -1586,7 +1586,7 @@ input.y: warning: shift/reduce conflict on token "+" [-Wcounterexamples]
↳ exp "+" exp
↳ exp "⊕" exp •
input.y: warning: shift/reduce conflict on token "+" [-Wcounterexamples]
Example exp "⊕" exp • "+" exp
Example: exp "⊕" exp • "+" exp
Shift derivation
exp
↳ exp "⊕" exp
@@ -1742,7 +1742,7 @@ State 7
shift/reduce conflict on token "⊕":
2 exp: exp "+" exp •
1 exp: exp • "⊕" exp
Example exp "+" exp • "⊕" exp
Example: exp "+" exp • "⊕" exp
Shift derivation
exp
↳ exp "+" exp
@@ -1755,7 +1755,7 @@ State 7
reduce/reduce conflict on tokens $end, "+", "⊕":
2 exp: exp "+" exp •
3 exp: exp "+" exp •
Example exp "+" exp •
Example: exp "+" exp •
First derivation
exp
↳ exp "+" exp •
@@ -1766,7 +1766,7 @@ State 7
shift/reduce conflict on token "⊕":
3 exp: exp "+" exp •
1 exp: exp • "⊕" exp
Example exp "+" exp • "⊕" exp
Example: exp "+" exp • "⊕" exp
Shift derivation
exp
↳ exp "+" exp
@@ -1795,7 +1795,7 @@ State 8
shift/reduce conflict on token "⊕":
1 exp: exp "⊕" exp •
1 exp: exp • "⊕" exp
Example exp "⊕" exp • "⊕" exp
Example: exp "⊕" exp • "⊕" exp
Shift derivation
exp
↳ exp "⊕" exp
@@ -1808,7 +1808,7 @@ State 8
shift/reduce conflict on token "+":
1 exp: exp "⊕" exp •
2 exp: exp • "+" exp
Example exp "⊕" exp • "+" exp
Example: exp "⊕" exp • "+" exp
Shift derivation
exp
↳ exp "⊕" exp
@@ -1821,7 +1821,7 @@ State 8
shift/reduce conflict on token "+":
1 exp: exp "⊕" exp •
3 exp: exp • "+" exp
Example exp "⊕" exp • "+" exp
Example: exp "⊕" exp • "+" exp
Shift derivation
exp
↳ exp "⊕" exp