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cex: display the rule numbers

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From

    Example: "if" expr "then" "if" expr "then" stmt • "else" stmt
    Shift derivation
      if_stmt
      ↳ "if" expr "then" stmt
                         ↳ if_stmt
                           ↳ "if" expr "then" stmt • "else" stmt
    Reduce derivation
      if_stmt
      ↳ "if" expr "then" stmt                        "else" stmt
                         ↳ if_stmt
                           ↳ "if" expr "then" stmt •

to

    Example: "if" expr "then" "if" expr "then" stmt • "else" stmt
    Shift derivation
      if_stmt
      ↳ 3: "if" expr "then" stmt
                            ↳ 2: if_stmt
                                 ↳ 4: "if" expr "then" stmt • "else" stmt
    Example: "if" expr "then" "if" expr "then" stmt • "else" stmt
    Reduce derivation
      if_stmt
      ↳ 4: "if" expr "then" stmt                              "else" stmt
                            ↳ 2: if_stmt
                                 ↳ 3: "if" expr "then" stmt •

* src/state-item.h, src/state-item.c (state_item_rule): New.
* src/derivation.h, src/derivation.c (struct derivation): Add a rule
member.
Adjust dependencies.
* src/counterexample.c, src/parse-simulation.c: Pass the rule to
derivation_new.
* src/derivation.c (fprintf_if): New.
(derivation_width, derivation_print_tree_impl): Take the rule number
into account.

* tests/conflicts.at, tests/counterexample.at, tests/diagnostics.at,
* tests/report.at: Adjust.

* doc/bison.texi: Adjust.
This commit is contained in:
Akim Demaille
2020-07-28 19:50:22 +02:00
parent 2becdace96
commit 3c36d871fa
13 changed files with 407 additions and 357 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
NEWS
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@@ -2,12 +2,10 @@ GNU Bison NEWS
* Noteworthy changes in release ?.? (????-??-??) [?] * Noteworthy changes in release ?.? (????-??-??) [?]
** Bug fixes
Push parsers use YYMALLOC/YYFREE instead of direct calls to malloc/free.
** Changes ** Changes
*** A C++ native GLR parser
A new version of the generated C++ GLR parser was added as "glr2.cc". It A new version of the generated C++ GLR parser was added as "glr2.cc". It
is forked from the existing glr.c/cc parser, with the objective of making is forked from the existing glr.c/cc parser, with the objective of making
it a more modern, truly C++ parser (instead of a C++ wrapper around a C it a more modern, truly C++ parser (instead of a C++ wrapper around a C
@@ -19,6 +17,21 @@ GNU Bison NEWS
%skeleton "glr2.cc" %skeleton "glr2.cc"
*** Counterexamples
Counterexamples now show the rule numbers:
exp
↳ 1: "if" exp "then" exp
↳ 2: "if" exp "then" exp • "else" exp
instead of
exp
↳ "if" exp "then" exp
↳ "if" exp "then" exp • "else" exp
* Noteworthy changes in release 3.7.1 (2020-08-02) [stable] * Noteworthy changes in release 3.7.1 (2020-08-02) [stable]
** Bug fixes ** Bug fixes

128
doc/bison.texi
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@@ -8329,29 +8329,29 @@ with two different parses:
Example: @yellow{"if" expr "then"} @blue{"if" expr "then" stmt} @red{•} @blue{"else" stmt} Example: @yellow{"if" expr "then"} @blue{"if" expr "then" stmt} @red{•} @blue{"else" stmt}
Shift derivation Shift derivation
@yellow{if_stmt} @yellow{if_stmt}
@yellow{↳ "if" expr "then"} @green{stmt} @yellow{↳ 3: "if" expr "then"} @green{stmt}
@green{↳} @blue{if_stmt} @green{↳ 2:} @blue{if_stmt}
@blue{↳ "if" expr "then" stmt} @red{•} @blue{"else" stmt} @blue{↳ 4: "if" expr "then" stmt} @red{•} @blue{"else" stmt}
Example: @yellow{"if" expr "then"} @blue{"if" expr "then" stmt} @red{•} @yellow{"else" stmt} Example: @yellow{"if" expr "then"} @blue{"if" expr "then" stmt} @red{•} @yellow{"else" stmt}
Reduce derivation Reduce derivation
@yellow{if_stmt} @yellow{if_stmt}
@yellow{↳ "if" expr "then"} @green{stmt} @yellow{"else" stmt} @yellow{↳ 4: "if" expr "then"} @green{stmt} @yellow{"else" stmt}
@green{↳} @blue{if_stmt} @green{↳ 2:} @blue{if_stmt}
@blue{↳ "if" expr "then" stmt} @red{•} @blue{↳ 3: "if" expr "then" stmt} @red{•}
@end ifnottex @end ifnottex
@iftex @iftex
Example: @yellow{"if" expr "then"} @blue{"if" expr "then" stmt} @red{•} @blue{"else" stmt} Example: @yellow{"if" expr "then"} @blue{"if" expr "then" stmt} @red{•} @blue{"else" stmt}
Shift derivation Shift derivation
@yellow{if_stmt} @yellow{if_stmt}
@yellow{@arrow{} "if" expr "then"} @green{stmt} @yellow{@arrow{} 3: "if" expr "then"} @green{stmt}
@green{@arrow{}} @blue{if_stmt} @green{@arrow{} 2:} @blue{if_stmt}
@blue{@arrow{} "if" expr "then" stmt} @red{•} @blue{"else" stmt} @blue{@arrow{} 4: "if" expr "then" stmt} @red{•} @blue{"else" stmt}
Example: @yellow{"if" expr "then"} @blue{"if" expr "then" stmt} @red{•} @yellow{"else" stmt} Example: @yellow{"if" expr "then"} @blue{"if" expr "then" stmt} @red{•} @yellow{"else" stmt}
Reduce derivation Reduce derivation
@yellow{if_stmt} @yellow{if_stmt}
@yellow{@arrow{} "if" expr "then"} @green{stmt} @yellow{"else" stmt} @yellow{@arrow{} 4: "if" expr "then"} @green{stmt} @yellow{"else" stmt}
@green{@arrow{}} @blue{if_stmt} @green{@arrow{} 2:} @blue{if_stmt}
@blue{@arrow{} "if" expr "then" stmt} @red{•} @blue{@arrow{} 3: "if" expr "then" stmt} @red{•}
@end iftex @end iftex
@end group @end group
@end macro @end macro
@@ -9957,11 +9957,11 @@ initially developed by Chinawat Isradisaikul and Andrew Myers
As a first example, see the grammar of @ref{Shift/Reduce}, which features As a first example, see the grammar of @ref{Shift/Reduce}, which features
one shift/reduce conflict: one shift/reduce conflict:
@c see doc/if-then-else.y @c see doc/else.y
@example @example
$ @kbd{bison if-then-else.y} $ @kbd{bison else.y}
if-then-else.y: @dwarning{warning}: 1 shift/reduce conflict [@dwarning{-Wconflicts-sr}] else.y: @dwarning{warning}: 1 shift/reduce conflict [@dwarning{-Wconflicts-sr}]
if-then-else.y: @dnotice{note}: rerun with option '-Wcounterexamples' to generate conflict counterexamples else.y: @dnotice{note}: rerun with option '-Wcounterexamples' to generate conflict counterexamples
@end example @end example
@noindent @noindent
@@ -9970,8 +9970,8 @@ Let's rerun @command{bison} with the option
output is actually in color)}: output is actually in color)}:
@example @example
if-then-else.y: @dwarning{warning}: 1 shift/reduce conflict [@dwarning{-Wconflicts-sr}] else.y: @dwarning{warning}: 1 shift/reduce conflict [@dwarning{-Wconflicts-sr}]
if-then-else.y: @dwarning{warning}: shift/reduce conflict on token "else" [@dwarning{-Wcounterexamples}] else.y: @dwarning{warning}: shift/reduce conflict on token "else" [@dwarning{-Wcounterexamples}]
@danglingElseCex @danglingElseCex
@end example @end example
@@ -10011,39 +10011,39 @@ sequence.y: @dwarning{warning}: shift/reduce conflict on token "word" [@dwarning
Example: @red{•} @green{"word"} Example: @red{•} @green{"word"}
Shift derivation Shift derivation
@yellow{sequence} @yellow{sequence}
@yellow{↳} @green{maybeword} @yellow{↳ 2:} @green{maybeword}
@green{↳} @red{•} @green{"word"} @green{↳ 5:} @red{•} @green{"word"}
Example: @red{•} @yellow{"word"} Example: @red{•} @yellow{"word"}
Reduce derivation Reduce derivation
@yellow{sequence} @yellow{sequence}
@yellow{↳} @green{sequence} @yellow{"word"} @yellow{↳ 3:} @green{sequence} @yellow{"word"}
@green{↳} @red{•} @green{↳ 1:} @red{•}
@end group @end group
@group @group
sequence.y: @dwarning{warning}: reduce/reduce conflict on tokens $end, "word" [@dwarning{-Wcounterexamples}] sequence.y: @dwarning{warning}: reduce/reduce conflict on tokens $end, "word" [@dwarning{-Wcounterexamples}]
Example: @red{•} Example: @red{•}
First reduce derivation First reduce derivation
@yellow{sequence} @yellow{sequence}
@yellow{↳} @red{•} @yellow{↳ 1:} @red{•}
Example: @red{•} Example: @red{•}
Second reduce derivation Second reduce derivation
@yellow{sequence} @yellow{sequence}
@yellow{↳} @green{maybeword} @yellow{↳ 2:} @green{maybeword}
@green{↳} @red{•} @green{↳ 4:} @red{•}
@end group @end group
@group @group
sequence.y: @dwarning{warning}: shift/reduce conflict on token "word" [@dwarning{-Wcounterexamples}] sequence.y: @dwarning{warning}: shift/reduce conflict on token "word" [@dwarning{-Wcounterexamples}]
Example: @red{•} @green{"word"} Example: @red{•} @green{"word"}
Shift derivation Shift derivation
@yellow{sequence} @yellow{sequence}
@yellow{↳} @green{maybeword} @yellow{↳ 2:} @green{maybeword}
@green{↳} @red{•} @green{"word"} @green{↳ 5:} @red{•} @green{"word"}
Example: @red{•} @yellow{"word"} Example: @red{•} @yellow{"word"}
Reduce derivation Reduce derivation
@yellow{sequence} @yellow{sequence}
@yellow{↳} @green{sequence} @yellow{"word"} @yellow{↳ 3:} @green{sequence} @yellow{"word"}
@green{↳} @blue{maybeword} @green{↳ 2:} @blue{maybeword}
@blue{↳} @red{•} @blue{↳ 4:} @red{•}
@end group @end group
@group @group
sequence.y:8.3-45: @dwarning{warning}: rule useless in parser due to conflicts [@dwarning{-Wother}] sequence.y:8.3-45: @dwarning{warning}: rule useless in parser due to conflicts [@dwarning{-Wother}]
@@ -10057,39 +10057,39 @@ sequence.y: @dwarning{warning}: shift/reduce conflict on token "word" [@dwarning
Example: @red{•} @green{"word"} Example: @red{•} @green{"word"}
Shift derivation Shift derivation
@yellow{sequence} @yellow{sequence}
@yellow{@arrow{}} @green{maybeword} @yellow{@arrow{} 2:} @green{maybeword}
@green{@arrow{}} @red{•} @green{"word"} @green{@arrow{} 5:} @red{•} @green{"word"}
Example: @red{•} @yellow{"word"} Example: @red{•} @yellow{"word"}
Reduce derivation Reduce derivation
@yellow{sequence} @yellow{sequence}
@yellow{@arrow{}} @green{sequence} @yellow{"word"} @yellow{@arrow{} 3:} @green{sequence} @yellow{"word"}
@green{@arrow{}} @red{•} @green{@arrow{} 1:} @red{•}
@end group @end group
@group @group
sequence.y: @dwarning{warning}: reduce/reduce conflict on tokens $end, "word" [@dwarning{-Wcounterexamples}] sequence.y: @dwarning{warning}: reduce/reduce conflict on tokens $end, "word" [@dwarning{-Wcounterexamples}]
Example: @red{•} Example: @red{•}
First reduce derivation First reduce derivation
@yellow{sequence} @yellow{sequence}
@yellow{@arrow{}} @red{•} @yellow{@arrow{} 1:} @red{•}
Example: @red{•} Example: @red{•}
Second reduce derivation Second reduce derivation
@yellow{sequence} @yellow{sequence}
@yellow{@arrow{}} @green{maybeword} @yellow{@arrow{} 2:} @green{maybeword}
@green{@arrow{}} @red{•} @green{@arrow{}: 4} @red{•}
@end group @end group
@group @group
sequence.y: @dwarning{warning}: shift/reduce conflict on token "word" [@dwarning{-Wcounterexamples}] sequence.y: @dwarning{warning}: shift/reduce conflict on token "word" [@dwarning{-Wcounterexamples}]
Example: @red{•} @green{"word"} Example: @red{•} @green{"word"}
Shift derivation Shift derivation
@yellow{sequence} @yellow{sequence}
@yellow{@arrow{}} @green{maybeword} @yellow{@arrow{} 2:} @green{maybeword}
@green{@arrow{}} @red{•} @green{"word"} @green{@arrow{} 5:} @red{•} @green{"word"}
Example: @red{•} @yellow{"word"} Example: @red{•} @yellow{"word"}
Reduce derivation Reduce derivation
@yellow{sequence} @yellow{sequence}
@yellow{@arrow{}} @green{sequence} @yellow{"word"} @yellow{@arrow{} 3:} @green{sequence} @yellow{"word"}
@green{@arrow{}} @blue{maybeword} @green{@arrow{} 2:} @blue{maybeword}
@blue{@arrow{}} @red{•} @blue{@arrow{} 4:} @red{•}
@end group @end group
@group @group
sequence.y:8.3-45: @dwarning{warning}: rule useless in parser due to conflicts [@dwarning{-Wother}] sequence.y:8.3-45: @dwarning{warning}: rule useless in parser due to conflicts [@dwarning{-Wother}]
@@ -10130,16 +10130,16 @@ ids.y: @dwarning{warning}: shift/reduce conflict on token ID [@dwarning{-Wcounte
First example: @purple{expr} @red{•} @purple{ID ','} @green{ID} @yellow{$end} First example: @purple{expr} @red{•} @purple{ID ','} @green{ID} @yellow{$end}
Shift derivation Shift derivation
@yellow{$accept} @yellow{$accept}
@yellow{↳} @green{s} @yellow{$end} @yellow{↳ 0:} @green{s} @yellow{$end}
@green{↳} @blue{a} @green{ID} @green{↳ 1:} @blue{a} @green{ID}
@blue{↳} @purple{expr} @blue{↳ 2:} @purple{expr}
@purple{↳ expr} @red{•} @purple{ID ','} @purple{↳ 4: expr} @red{•} @purple{ID ','}
Second example: @blue{expr} @red{•} @green{ID} @yellow{$end} Second example: @blue{expr} @red{•} @green{ID} @yellow{$end}
Reduce derivation Reduce derivation
@yellow{$accept} @yellow{$accept}
@yellow{↳} @green{s} @yellow{$end} @yellow{↳ 0:} @green{s} @yellow{$end}
@green{↳} @blue{a} @green{ID} @green{↳ 1:} @blue{a} @green{ID}
@blue{↳ expr} @red{•} @blue{↳ 2: expr} @red{•}
@end group @end group
@group @group
ids.y:4.4-7: @dwarning{warning}: rule useless in parser due to conflicts [@dwarning{-Wother}] ids.y:4.4-7: @dwarning{warning}: rule useless in parser due to conflicts [@dwarning{-Wother}]
@@ -10152,16 +10152,16 @@ ids.y:4.4-7: @dwarning{warning}: rule useless in parser due to conflicts [@dwarn
First example: @purple{expr} @red{•} @purple{ID ','} @green{ID} @yellow{$end} First example: @purple{expr} @red{•} @purple{ID ','} @green{ID} @yellow{$end}
Shift derivation Shift derivation
@yellow{$accept} @yellow{$accept}
@yellow{@arrow{}} @green{s} @yellow{$end} @yellow{@arrow{} 0:} @green{s} @yellow{$end}
@green{@arrow{}} @blue{a} @green{ID} @green{@arrow{} 1:} @blue{a} @green{ID}
@blue{@arrow{}} @purple{expr} @blue{@arrow{} 2:} @purple{expr}
@purple{@arrow{} expr} @red{•} @purple{ID ','} @purple{@arrow{} 4: expr} @red{•} @purple{ID ','}
Second example: @blue{expr} @red{•} @green{ID} @yellow{$end} Second example: @blue{expr} @red{•} @green{ID} @yellow{$end}
Reduce derivation Reduce derivation
@yellow{$accept} @yellow{$accept}
@yellow{@arrow{}} @green{s} @yellow{$end} @yellow{@arrow{} 0:} @green{s} @yellow{$end}
@green{@arrow{}} @blue{a} @green{ID} @green{@arrow{} 1:} @blue{a} @green{ID}
@blue{@arrow{} expr} @red{•} @blue{@arrow{} 2: expr} @red{•}
@end group @end group
@group @group
ids.y:4.4-7: @dwarning{warning}: rule useless in parser due to conflicts [@dwarning{-Wother}] ids.y:4.4-7: @dwarning{warning}: rule useless in parser due to conflicts [@dwarning{-Wother}]
@@ -10570,13 +10570,13 @@ shift/reduce conflict on token '/':
Example: exp '+' exp • '/' exp Example: exp '+' exp • '/' exp
Shift derivation Shift derivation
exp exp
↳ exp '+' exp ↳ 1: exp '+' exp
↳ exp • '/' exp ↳ 4: exp • '/' exp
Example: exp '+' exp • '/' exp Example: exp '+' exp • '/' exp
Reduce derivation Reduce derivation
exp exp
↳ exp '/' exp ↳ 4: exp '/' exp
↳ exp '+' exp • ↳ 1: exp '+' exp •
@end group @end group
@end example @end example
@end ifnottex @end ifnottex
@@ -10589,13 +10589,13 @@ shift/reduce conflict on token '/':
Example: exp '+' exp • '/' exp Example: exp '+' exp • '/' exp
Shift derivation Shift derivation
exp exp
@arrow{} exp '+' exp @arrow{} 1: exp '+' exp
@arrow{} exp • '/' exp @arrow{} 4: exp • '/' exp
Example: exp '+' exp • '/' exp Example: exp '+' exp • '/' exp
Reduce derivation Reduce derivation
exp exp
@arrow{} exp '/' exp @arrow{} 4: exp '/' exp
@arrow{} exp '+' exp • @arrow{} 1: exp '+' exp •
@end group @end group
@end example @end example
@end iftex @end iftex

0
doc/if-then-else.y → doc/else.y
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5
src/counterexample.c
View File

@@ -288,7 +288,8 @@ expand_to_conflict (state_item_number start, symbol_number conflict_sym)
derivation_list_append (result, derivation_new_leaf (*i)); derivation_list_append (result, derivation_new_leaf (*i));
symbol_number lhs = symbol_number lhs =
rules[item_number_as_rule_number (*i)].lhs->number; rules[item_number_as_rule_number (*i)].lhs->number;
derivation *deriv = derivation_new (lhs, result); derivation *deriv = derivation_new (lhs, result,
state_item_rule (si));
result = derivation_list_new (); result = derivation_list_new ();
derivation_list_append (result, deriv); derivation_list_append (result, deriv);
} }
@@ -422,7 +423,7 @@ complete_diverging_example (symbol_number conflict_sym,
derivation_list_prepend (result, derivation_new_leaf (*i)); derivation_list_prepend (result, derivation_new_leaf (*i));
} }
// completing the derivation // completing the derivation
derivation *new_deriv = derivation_new (r->lhs->number, result); derivation *new_deriv = derivation_new (r->lhs->number, result, r);
result = derivation_list_new (); result = derivation_list_new ();
derivation_list_append (result, new_deriv); derivation_list_append (result, new_deriv);
} }

28
src/derivation.c
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@@ -25,6 +25,7 @@
#include <c-ctype.h> #include <c-ctype.h>
#include <gl_linked_list.h> #include <gl_linked_list.h>
#include <mbswidth.h> #include <mbswidth.h>
#include <vasnprintf.h>
#include "system.h" #include "system.h"
#include "complain.h" #include "complain.h"
@@ -34,13 +35,15 @@ struct derivation
symbol_number sym; symbol_number sym;
derivation_list children; derivation_list children;
int reference_count; int reference_count;
// The rule SYM -> CHILDREN.
const rule *rule;
// Color assigned for styling. Guarantees that the derivation is // Color assigned for styling. Guarantees that the derivation is
// always displayed with the same color, independently of the order // always displayed with the same color, independently of the order
// in which the derivations are traversed. // in which the derivations are traversed.
int color; int color;
}; };
static derivation d_dot = { -1, NULL, -1, -1 }; static derivation d_dot = { -1, NULL, -1, NULL, -1 };
derivation * derivation *
derivation_dot (void) derivation_dot (void)
@@ -74,12 +77,14 @@ void derivation_list_free (derivation_list dl)
} }
derivation * derivation *
derivation_new (symbol_number sym, derivation_list children) derivation_new (symbol_number sym, derivation_list children,
const rule *r)
{ {
derivation *res = xmalloc (sizeof *res); derivation *res = xmalloc (sizeof *res);
res->sym = sym; res->sym = sym;
res->children = children; res->children = children;
res->reference_count = 0; res->reference_count = 0;
res->rule = r;
res->color = -1; res->color = -1;
return res; return res;
} }
@@ -205,6 +210,23 @@ fputs_if (bool cond, FILE *out, int *padding, const char *s)
return res; return res;
} }
static int
fprintf_if (bool cond, FILE *out, int *padding, const char *fmt, ...)
{
char buf[256];
size_t len = sizeof (buf);
va_list args;
va_start (args, fmt);
char *cp = vasnprintf (buf, &len, fmt, args);
va_end (args);
if (!cp)
xalloc_die ();
int res = fputs_if (cond, out, padding, cp);
if (cp != buf)
free (cp);
return res;
}
// The width taken to report this derivation recursively down to its // The width taken to report this derivation recursively down to its
// leaves. // leaves.
static int static int
@@ -217,6 +239,7 @@ derivation_width (const derivation *deriv)
// Arrow and space. // Arrow and space.
int children_width = down_arrow_width; int children_width = down_arrow_width;
children_width += snprintf (NULL, 0, "%d: ", deriv->rule->number);
if (gl_list_size (deriv->children) == 0) if (gl_list_size (deriv->children) == 0)
// Empty rhs. // Empty rhs.
children_width += empty_width; children_width += empty_width;
@@ -281,6 +304,7 @@ derivation_print_tree_impl (const derivation *deriv, FILE *out,
else else
{ {
res += fputs_if (depth == 1, out, padding, down_arrow); res += fputs_if (depth == 1, out, padding, down_arrow);
res += fprintf_if (depth == 1, out, padding, "%d: ", deriv->rule->number);
if (gl_list_size (deriv->children) == 0) if (gl_list_size (deriv->children) == 0)
// Empty rhs. // Empty rhs.
res += fputs_if (depth == 1, out, padding, empty); res += fputs_if (depth == 1, out, padding, empty);

7
src/derivation.h
View File

@@ -54,11 +54,14 @@ void derivation_list_append (derivation_list dl, derivation *d);
void derivation_list_prepend (derivation_list dl, derivation *d); void derivation_list_prepend (derivation_list dl, derivation *d);
void derivation_list_free (derivation_list dl); void derivation_list_free (derivation_list dl);
derivation *derivation_new (symbol_number sym, derivation_list children); // rule_num is the number of the rule SYM -> CHILDREN.
derivation *
derivation_new (symbol_number sym, derivation_list children,
const rule *r);
static inline derivation *derivation_new_leaf (symbol_number sym) static inline derivation *derivation_new_leaf (symbol_number sym)
{ {
return derivation_new (sym, NULL); return derivation_new (sym, NULL, NULL);
} }
// Number of symbols. // Number of symbols.

6
src/parse-simulation.c
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@@ -421,7 +421,9 @@ nullable_closure (parse_state *ps, state_item *si, parse_state_list state_list)
state_item *nsi = &state_items[sin]; state_item *nsi = &state_items[sin];
current_ps = copy_parse_state (false, current_ps); current_ps = copy_parse_state (false, current_ps);
ps_si_append (current_ps, nsi); ps_si_append (current_ps, nsi);
ps_derivs_append (current_ps, derivation_new (sp, derivation_list_new ())); ps_derivs_append (current_ps,
derivation_new (sp, derivation_list_new (),
state_item_rule (nsi)));
parse_state_list_append (state_list, current_ps); parse_state_list_append (state_list, current_ps);
} }
} }
@@ -516,7 +518,7 @@ simulate_reduction (parse_state *ps, int rule_len, bitset symbol_set)
state_item *si = (state_item *) ps->state_items.tail_elt; state_item *si = (state_item *) ps->state_items.tail_elt;
const rule *r = item_rule (si->item); const rule *r = item_rule (si->item);
symbol_number lhs = r->lhs->number; symbol_number lhs = r->lhs->number;
derivation *deriv = derivation_new (lhs, popped_derivs); derivation *deriv = derivation_new (lhs, popped_derivs, state_item_rule (si));
--new_root->depth; --new_root->depth;
ps_derivs_append (new_root, deriv); ps_derivs_append (new_root, deriv);

6
src/state-item.c
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@@ -482,6 +482,12 @@ state_item_print (const state_item *si, FILE *out, const char *prefix)
putc ('\n', out); putc ('\n', out);
} }
const rule*
state_item_rule (const state_item *si)
{
return item_rule (si->item);
}
/** /**
* Report the state_item graph * Report the state_item graph
*/ */

1
src/state-item.h
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@@ -93,6 +93,7 @@ void state_items_init (void);
void state_items_free (void); void state_items_free (void);
void state_item_print (const state_item *si, FILE *out, const char *prefix); void state_item_print (const state_item *si, FILE *out, const char *prefix);
const rule *state_item_rule (const state_item *si);
bool production_allowed (const state_item *si, const state_item *next); bool production_allowed (const state_item *si, const state_item *next);

44
tests/conflicts.at
View File

@@ -867,12 +867,12 @@ State 5
Example: exp OP exp . OP exp Example: exp OP exp . OP exp
Shift derivation Shift derivation
exp exp
`-> exp OP exp `-> 1: exp OP exp
`-> exp . OP exp `-> 1: exp . OP exp
Reduce derivation Reduce derivation
exp exp
`-> exp OP exp `-> 1: exp OP exp
`-> exp OP exp . `-> 1: exp OP exp .
]]) ]])
@@ -1215,12 +1215,12 @@ State 1
Example: '0' . Example: '0' .
First reduce derivation First reduce derivation
exp exp
`-> num `-> 1: num
`-> '0' . `-> 3: '0' .
Second reduce derivation Second reduce derivation
exp exp
`-> id `-> 2: id
`-> '0' . `-> 4: '0' .
@@ -1770,13 +1770,13 @@ State 4
First example: resolved_conflict . 'a' 'a' First example: resolved_conflict . 'a' 'a'
Shift derivation Shift derivation
start start
`-> resolved_conflict reported_conflicts 'a' `-> 1: resolved_conflict reported_conflicts 'a'
`-> . 'a' `-> 8: . 'a'
Second example: resolved_conflict . 'a' Second example: resolved_conflict . 'a'
Reduce derivation Reduce derivation
start start
`-> resolved_conflict reported_conflicts 'a' `-> 1: resolved_conflict reported_conflicts 'a'
`-> . `-> 10: .
shift/reduce conflict on token 'a': shift/reduce conflict on token 'a':
10 reported_conflicts: . %empty 10 reported_conflicts: . %empty
@@ -1784,13 +1784,13 @@ State 4
First example: resolved_conflict . 'a' 'a' First example: resolved_conflict . 'a' 'a'
Shift derivation Shift derivation
start start
`-> resolved_conflict reported_conflicts 'a' `-> 1: resolved_conflict reported_conflicts 'a'
`-> . 'a' `-> 9: . 'a'
Second example: resolved_conflict . 'a' Second example: resolved_conflict . 'a'
Reduce derivation Reduce derivation
start start
`-> resolved_conflict reported_conflicts 'a' `-> 1: resolved_conflict reported_conflicts 'a'
`-> . `-> 10: .
@@ -1809,10 +1809,10 @@ State 5
Example: 'a' . Example: 'a' .
First reduce derivation First reduce derivation
reported_conflicts reported_conflicts
`-> 'a' . `-> 8: 'a' .
Second reduce derivation Second reduce derivation
reported_conflicts reported_conflicts
`-> 'a' . `-> 9: 'a' .
@@ -1999,12 +1999,12 @@ AT_CHECK([[cat input.output | sed -n '/^State 0$/,/^State 1$/p']], 0,
Example: . 'c' Example: . 'c'
First reduce derivation First reduce derivation
start start
`-> empty_c2 'c' `-> 7: empty_c2 'c'
`-> . `-> 12: .
Second reduce derivation Second reduce derivation
start start
`-> empty_c3 'c' `-> 8: empty_c3 'c'
`-> . `-> 13: .

370
tests/counterexample.at
View File

@@ -58,12 +58,12 @@ input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example: A . B C Example: A . B C
Shift derivation Shift derivation
s s
`-> y c `-> 2: y c
`-> A . B `-> C `-> 8: A . B `-> 4: C
Reduce derivation Reduce derivation
s s
`-> a x `-> 1: a x
`-> A . `-> B C `-> 3: A . `-> 6: 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]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
@@ -98,29 +98,29 @@ input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example: A . B C Example: A . B C
Shift derivation Shift derivation
s s
`-> ac `-> 1: ac
`-> A ac C `-> 3: A ac C
`-> b `-> 4: b
`-> . B `-> 5: . B
Reduce derivation Reduce derivation
s s
`-> a bc `-> 2: a bc
`-> A . `-> B C `-> 7: A . `-> 10: 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 Shift derivation
s s
`-> ac `-> 1: ac
`-> A ac C `-> 3: A ac C
`-> A ac C `-> 3: A ac C
`-> b `-> 4: b
`-> . b `-> 6: . b
`-> B B `-> 5: B B
Reduce derivation Reduce derivation
s s
`-> a bc `-> 2: a bc
`-> A a `-> B bc C `-> 8: A a `-> 9: B bc C
`-> A . `-> B C `-> 7: A . `-> 10: 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]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
@@ -160,29 +160,29 @@ input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example: A . B Example: A . B
Shift derivation Shift derivation
s s
`-> A xby `-> 2: A xby
`-> . B `-> 9: . B
Reduce derivation Reduce derivation
s s
`-> ax by `-> 1: ax by
`-> A x `-> B y `-> 3: A x `-> 6: B y
`-> . `-> %empty `-> 4: . `-> 6: %empty
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 Shift derivation
$accept $accept
`-> s $end `-> 0: s $end
`-> A xby `-> 2: A xby
`-> X xby Y `-> 10: X xby Y
`-> . B `-> 9: . B
Second example: A X . B y $end Second example: A X . B y $end
Reduce derivation Reduce derivation
$accept $accept
`-> s $end `-> 0: s $end
`-> ax by `-> 1: ax by
`-> A x `-> B y `-> 3: A x `-> 6: B y
`-> X x `-> 5: X x
`-> . `-> 4: .
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]
]], ]],
[[input.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr] [[input.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr]
@@ -223,17 +223,17 @@ input.y: warning: shift/reduce conflict on token C [-Wcounterexamples]
First example: B . C $end First example: B . C $end
Shift derivation Shift derivation
$accept $accept
`-> g $end `-> 0: g $end
`-> x `-> 2: x
`-> bc `-> 6: bc
`-> B . C `-> 9: B . C
Second example: B . C D $end Second example: B . C D $end
Reduce derivation Reduce derivation
$accept $accept
`-> g $end `-> 0: g $end
`-> x `-> 2: x
`-> b cd `-> 5: b cd
`-> B . `-> C D `-> 7: B . `-> 8: C D
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]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
@@ -268,18 +268,18 @@ input.y: warning: shift/reduce conflict on token A [-Wcounterexamples]
First example: A . A B $end First example: A . A B $end
Shift derivation Shift derivation
$accept $accept
`-> s $end `-> 0: s $end
`-> t `-> 1: t
`-> y `-> 4: y
`-> A . A B `-> 6: A . A B
Second example: A . A $end Second example: A . A $end
Reduce derivation Reduce derivation
$accept $accept
`-> s $end `-> 0: s $end
`-> s t `-> 2: s t
`-> t `-> x `-> 1: t `-> 3: x
`-> x `-> A `-> 3: x `-> 5: A
`-> A . `-> 5: A .
]], ]],
[[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]
@@ -317,26 +317,26 @@ input.y: warning: shift/reduce conflict on token A [-Wcounterexamples]
Example: b . A X X Y Example: b . A X X Y
Shift derivation Shift derivation
a a
`-> s `-> 2: s
`-> b . xx y `-> 7: b . xx y
`-> A X X `-> Y `-> 9: A X X `-> 11: Y
Reduce derivation Reduce derivation
a a
`-> r t `-> 1: r t
`-> b . `-> A x xy `-> 3: b . `-> 6: A x xy
`-> X `-> X Y `-> 8: X `-> 10: 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 Shift derivation
a a
`-> t `-> 1: t
`-> A xx `-> 5: A xx
`-> X . X `-> 9: X . X
Second example: X . X xy Second example: X . X xy
Reduce derivation Reduce derivation
a a
`-> x t `-> 1: x t
`-> X . `-> X xy `-> 8: X . `-> 6: 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]
]], ]],
@@ -375,11 +375,11 @@ input.y: warning: reduce/reduce conflict on token $end [-Wcounterexamples]
Example: A b . Example: A b .
First reduce derivation First reduce derivation
a a
`-> A b . `-> 1: A b .
Second reduce derivation Second reduce derivation
a a
`-> A b `-> 1: A b
`-> b . `-> 3: 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]
]], ]],
[[input.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr] [[input.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr]
@@ -412,15 +412,15 @@ input.y: warning: reduce/reduce conflict on tokens A, C [-Wcounterexamples]
First example: D . A $end First example: D . A $end
First reduce derivation First reduce derivation
$accept $accept
`-> s $end `-> 0: s $end
`-> a A `-> 1: a A
`-> D . `-> 5: D .
Second example: B D . A $end Second example: B D . A $end
Second reduce derivation Second reduce derivation
$accept $accept
`-> s $end `-> 0: s $end
`-> B b A `-> 4: B b A
`-> D . `-> 6: 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: warning: 2 reduce/reduce conflicts [-Wconflicts-rr] [[input.y: warning: 2 reduce/reduce conflicts [-Wconflicts-rr]
@@ -455,15 +455,15 @@ time limit exceeded: XXX
First example: H i . J K $end First example: H i . J K $end
Shift derivation Shift derivation
$accept $accept
`-> a $end `-> 0: a $end
`-> H i `-> 2: H i
`-> i . J K `-> 4: i . J K
Second example: H i . J $end Second example: H i . J $end
Reduce derivation Reduce derivation
$accept $accept
`-> s $end `-> 0: s $end
`-> a J `-> 1: a J
`-> H i . `-> 2: H i .
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]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
@@ -502,28 +502,28 @@ input.y: warning: shift/reduce conflict on token B [-Wcounterexamples]
Example: N A . B C Example: N A . B C
Shift derivation Shift derivation
s s
`-> n `-> 1: n
`-> N b `-> 6: N b
`-> A . B C `-> 8: A . B C
Reduce derivation Reduce derivation
s s
`-> n C `-> 2: n C
`-> N a B `-> 5: N a B
`-> A . `-> 7: A .
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 Shift derivation
s s
`-> n `-> 1: n
`-> N n C `-> 4: N n C
`-> N b `-> 6: N b
`-> A . B D `-> 9: A . B D
Reduce derivation Reduce derivation
s s
`-> n C `-> 2: n C
`-> N n D `-> 3: N n D
`-> N a B `-> 5: N a B
`-> A . `-> 7: A .
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: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
@@ -565,30 +565,30 @@ input.y: warning: reduce/reduce conflict on tokens b, c [-Wcounterexamples]
Example: B . b c Example: B . b c
First reduce derivation First reduce derivation
S S
`-> B C `-> 1: B C
`-> A b A `-> A c A `-> 6: A b A `-> 7: A c A
`-> B . `-> %empty `-> %empty `-> %empty `-> 3: B . `-> 6: %empty `-> 7: %empty `-> 7: %empty
Second reduce derivation Second reduce derivation
S S
`-> B C `-> 1: B C
`-> A c A `-> 7: A c A
`-> B `-> %empty `-> 3: B `-> 7: %empty
`-> A b A `-> 6: A b A
`-> . `-> %empty `-> 5: . `-> 6: %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 reduce derivation First reduce derivation
S S
`-> C B `-> 2: C B
`-> A c A `-> A b A `-> 7: A c A `-> 6: A b A
`-> C . `-> %empty `-> %empty `-> %empty `-> 4: C . `-> 7: %empty `-> 6: %empty `-> 6: %empty
Second reduce derivation Second reduce derivation
S S
`-> C B `-> 2: C B
`-> A b A `-> 6: A b A
`-> C `-> %empty `-> 4: C `-> 6: %empty
`-> A c A `-> 7: A c A
`-> . `-> %empty `-> 5: . `-> 7: %empty
]], ]],
[[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]
@@ -625,119 +625,119 @@ input.y: warning: reduce/reduce conflict on token A [-Wcounterexamples]
First example: . c A A $end First example: . c A A $end
First reduce derivation First reduce derivation
$accept $accept
`-> a $end `-> 0: a $end
`-> b d `-> 1: b d
`-> . `-> c A A `-> 3: . `-> 6: c A A
Second example: . c A A $end Second example: . c A A $end
Second reduce derivation Second reduce derivation
$accept $accept
`-> a $end `-> 0: a $end
`-> c d `-> 2: c d
`-> . `-> c A A `-> 4: . `-> 6: c A A
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 reduce derivation First reduce derivation
$accept $accept
`-> a $end `-> 0: a $end
`-> b d `-> 1: b d
`-> a `-> 5: a
`-> b d `-> 1: b d
`-> . `-> c A A `-> 3: . `-> 6: c A A
Second example: b . A $end Second example: b . A $end
Second reduce derivation Second reduce derivation
$accept $accept
`-> a $end `-> 0: a $end
`-> b d `-> 1: b d
`-> c A `-> 6: c A
`-> . `-> 4: .
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 reduce derivation First reduce derivation
$accept $accept
`-> a $end `-> 0: a $end
`-> c d `-> 2: c d
`-> a `-> 5: a
`-> b d `-> 1: b d
`-> . `-> c A A `-> 3: . `-> 6: c A A
Second example: c . A $end Second example: c . A $end
Second reduce derivation Second reduce derivation
$accept $accept
`-> a $end `-> 0: a $end
`-> c d `-> 2: c d
`-> c A `-> 6: c A
`-> . `-> 4: .
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 Shift derivation
a a
`-> b d `-> 1: b d
`-> c . A `-> 6: c . A
Second example: b c . c A A $end Second example: b c . c A A $end
Reduce derivation Reduce derivation
$accept $accept
`-> a $end `-> 0: a $end
`-> b d `-> 1: b d
`-> a `-> 5: a
`-> c d `-> 2: c d
`-> a `-> 5: a
`-> b d `-> 1: b d
`-> . `-> c A A `-> 3: . `-> 6: 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 reduce derivation First reduce derivation
$accept $accept
`-> a $end `-> 0: a $end
`-> b d `-> 1: b d
`-> a `-> 5: a
`-> c d `-> 2: c d
`-> a `-> 5: a
`-> b d `-> 1: b d
`-> . `-> c A A `-> 3: . `-> 6: c A A
Second example: b c . A $end Second example: b c . A $end
Second reduce derivation Second reduce derivation
$accept $accept
`-> a $end `-> 0: a $end
`-> b d `-> 1: b d
`-> a `-> 5: a
`-> c d `-> 2: c d
`-> c A `-> 6: c A
`-> . `-> 4: .
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 Shift derivation
a a
`-> b d `-> 1: b d
`-> c . A `-> 6: c . A
Second example: b c . A $end Second example: b c . A $end
Reduce derivation Reduce derivation
$accept $accept
`-> a $end `-> 0: a $end
`-> b d `-> 1: b d
`-> a `-> 5: a
`-> c d `-> 2: c d
`-> c A `-> 6: c A
`-> . `-> 4: .
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 reduce derivation First reduce derivation
a a
`-> b d . `-> 1: b d .
Second reduce derivation Second reduce derivation
a a
`-> b d `-> 1: b d
`-> d . `-> 7: 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 reduce derivation First reduce derivation
a a
`-> c d . `-> 2: c d .
Second reduce derivation Second reduce derivation
a a
`-> c d `-> 2: c d
`-> d . `-> 7: 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]
]], ]],
@@ -813,13 +813,13 @@ input.y: warning: shift/reduce conflict on token J [-Wcounterexamples]
Example: H i J . J J Example: H i J . J J
Shift derivation Shift derivation
s s
`-> a J `-> 2: a J
`-> H i J . J `-> 3: H i J . J
Reduce derivation Reduce derivation
s s
`-> a `-> 1: a
`-> H i J J `-> 3: H i J J
`-> i J . `-> 5: i 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]
]], ]],
[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] [[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
@@ -857,14 +857,14 @@ input.y: warning: shift/reduce conflict on token D [-Wcounterexamples]
Example: A a . D Example: A a . D
Shift derivation Shift derivation
s s
`-> A a d `-> 1: A a d
`-> . D `-> 6: . D
Reduce derivation Reduce derivation
s s
`-> A a a d `-> 2: A a a d
`-> b `-> D `-> 3: b `-> 6: D
`-> c `-> 4: c
`-> . `-> 5: .
]], ]],
[[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]
@@ -899,17 +899,17 @@ input.y: warning: shift/reduce conflict on token D [-Wcounterexamples]
First example: A a . D $end First example: A a . D $end
Shift derivation Shift derivation
$accept $accept
`-> s $end `-> 0: s $end
`-> A a d `-> 1: A a d
`-> . D `-> 6: . D
Second example: A a . D E $end Second example: A a . D E $end
Reduce derivation Reduce derivation
$accept $accept
`-> s $end `-> 0: s $end
`-> A a a d E `-> 2: A a a d E
`-> b `-> D `-> 3: b `-> 6: D
`-> c `-> 4: c
`-> . `-> 5: .
]], ]],
[[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]

60
tests/diagnostics.at
View File

@@ -539,46 +539,46 @@ input.y: <warning>warning:</warning> shift/reduce conflict on token "+" [<warnin
[[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>] 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> 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 Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0> <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-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> <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> 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 Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0> <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-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> <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>] 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> 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 Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0> <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-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> <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> 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 Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0> <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-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> <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>] 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> 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 Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0> <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-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> <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> 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 Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0> <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-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> <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>] 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> 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 Shift derivation
<cex-0><cex-step>exp</cex-step></cex-0> <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-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> <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> 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 Reduce derivation
<cex-0><cex-step>exp</cex-step></cex-0> <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-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> <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>
]]) ]])
@@ -621,23 +621,23 @@ input.y: <warning>warning:</warning> reduce/reduce conflict on token "X" [<warni
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>
<cex-0><cex-step>↳ <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-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> ↳ <cex-2><cex-step>x2</cex-step></cex-2></cex-step></cex-1><cex-4><cex-step> ↳ ε</cex-step></cex-4><cex-5><cex-step> ↳ <cex-6><cex-step>foo2</cex-step></cex-6></cex-step></cex-5><cex-12><cex-step> ↳ <cex-13><cex-step>x2</cex-step></cex-13></cex-step></cex-12> <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> ↳ <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-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> ↳ <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> ↳ 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> ↳ <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> ↳ 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-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> <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> 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>
<cex-0><cex-step>↳ <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-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> ↳ <cex-2><cex-step>y2</cex-step></cex-2></cex-step></cex-1><cex-4><cex-step> ↳ ε</cex-step></cex-4><cex-5><cex-step> ↳ <cex-6><cex-step>bar2</cex-step></cex-6></cex-step></cex-5><cex-12><cex-step> ↳ <cex-13><cex-step>y2</cex-step></cex-13></cex-step></cex-12> <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> ↳ <cex-3><cex-step>y3</cex-step></cex-3></cex-step></cex-2><cex-6><cex-step> ↳ <cex-7><cex-step>bar3</cex-step></cex-7></cex-step></cex-6><cex-13><cex-step> ↳ <cex-14><cex-step>y3</cex-step></cex-14></cex-step></cex-13> <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> ↳ <cex-leaf>"X"</cex-leaf><cex-dot> •</cex-dot></cex-step></cex-3><cex-7><cex-step> ↳ <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> ↳ <cex-leaf>"X"</cex-leaf></cex-step></cex-14> <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> ↳ <cex-9><cex-step>y2</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> ↳ 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-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> <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>] input.y: <warning>warning:</warning> fix-its can be applied. Rerun with option '--update'. [<warning>-Wother</warning>]

88
tests/report.at
View File

@@ -1541,60 +1541,60 @@ input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
Example: exp "+" exp • "⊕" exp Example: exp "+" exp • "⊕" exp
Shift derivation Shift derivation
exp exp
↳ exp "+" exp ↳ 2: exp "+" exp
↳ exp • "⊕" exp ↳ 1: exp • "⊕" exp
Reduce derivation Reduce derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp "+" exp • ↳ 2: 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 reduce derivation First reduce derivation
exp exp
↳ exp "+" exp • ↳ 2: exp "+" exp •
Second reduce derivation Second reduce derivation
exp exp
↳ exp "+" exp • ↳ 3: exp "+" exp •
input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples] input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
Example: exp "+" exp • "⊕" exp Example: exp "+" exp • "⊕" exp
Shift derivation Shift derivation
exp exp
↳ exp "+" exp ↳ 2: exp "+" exp
↳ exp • "⊕" exp ↳ 1: exp • "⊕" exp
Reduce derivation Reduce derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp "+" exp • ↳ 3: exp "+" exp •
input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples] input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
Example: exp "⊕" exp • "⊕" exp Example: exp "⊕" exp • "⊕" exp
Shift derivation Shift derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp • "⊕" exp ↳ 1: exp • "⊕" exp
Reduce derivation Reduce derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp "⊕" exp • ↳ 1: exp "⊕" exp •
input.y: warning: shift/reduce conflict on token "+" [-Wcounterexamples] input.y: warning: shift/reduce conflict on token "+" [-Wcounterexamples]
Example: exp "⊕" exp • "+" exp Example: exp "⊕" exp • "+" exp
Shift derivation Shift derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp • "+" exp ↳ 2: exp • "+" exp
Reduce derivation Reduce derivation
exp exp
↳ exp "+" exp ↳ 2: exp "+" exp
↳ exp "⊕" exp • ↳ 1: exp "⊕" exp •
input.y: warning: shift/reduce conflict on token "+" [-Wcounterexamples] input.y: warning: shift/reduce conflict on token "+" [-Wcounterexamples]
Example: exp "⊕" exp • "+" exp Example: exp "⊕" exp • "+" exp
Shift derivation Shift derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp • "+" exp ↳ 3: exp • "+" exp
Reduce derivation Reduce derivation
exp exp
↳ exp "+" exp ↳ 2: exp "+" exp
↳ exp "⊕" exp • ↳ 1: 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]
]]) ]])
@@ -1745,12 +1745,12 @@ State 7
Example: exp "+" exp • "⊕" exp Example: exp "+" exp • "⊕" exp
Shift derivation Shift derivation
exp exp
↳ exp "+" exp ↳ 2: exp "+" exp
↳ exp • "⊕" exp ↳ 1: exp • "⊕" exp
Reduce derivation Reduce derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp "+" exp • ↳ 2: exp "+" exp •
reduce/reduce conflict on tokens $end, "+", "⊕": reduce/reduce conflict on tokens $end, "+", "⊕":
2 exp: exp "+" exp • 2 exp: exp "+" exp •
@@ -1758,10 +1758,10 @@ State 7
Example: exp "+" exp • Example: exp "+" exp •
First reduce derivation First reduce derivation
exp exp
↳ exp "+" exp • ↳ 2: exp "+" exp •
Second reduce derivation Second reduce derivation
exp exp
↳ exp "+" exp • ↳ 3: exp "+" exp •
shift/reduce conflict on token "⊕": shift/reduce conflict on token "⊕":
3 exp: exp "+" exp • 3 exp: exp "+" exp •
@@ -1769,12 +1769,12 @@ State 7
Example: exp "+" exp • "⊕" exp Example: exp "+" exp • "⊕" exp
Shift derivation Shift derivation
exp exp
↳ exp "+" exp ↳ 2: exp "+" exp
↳ exp • "⊕" exp ↳ 1: exp • "⊕" exp
Reduce derivation Reduce derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp "+" exp • ↳ 3: exp "+" exp •
@@ -1798,12 +1798,12 @@ State 8
Example: exp "⊕" exp • "⊕" exp Example: exp "⊕" exp • "⊕" exp
Shift derivation Shift derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp • "⊕" exp ↳ 1: exp • "⊕" exp
Reduce derivation Reduce derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp "⊕" exp • ↳ 1: exp "⊕" exp •
shift/reduce conflict on token "+": shift/reduce conflict on token "+":
1 exp: exp "⊕" exp • 1 exp: exp "⊕" exp •
@@ -1811,12 +1811,12 @@ State 8
Example: exp "⊕" exp • "+" exp Example: exp "⊕" exp • "+" exp
Shift derivation Shift derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp • "+" exp ↳ 2: exp • "+" exp
Reduce derivation Reduce derivation
exp exp
↳ exp "+" exp ↳ 2: exp "+" exp
↳ exp "⊕" exp • ↳ 1: exp "⊕" exp •
shift/reduce conflict on token "+": shift/reduce conflict on token "+":
1 exp: exp "⊕" exp • 1 exp: exp "⊕" exp •
@@ -1824,12 +1824,12 @@ State 8
Example: exp "⊕" exp • "+" exp Example: exp "⊕" exp • "+" exp
Shift derivation Shift derivation
exp exp
↳ exp "⊕" exp ↳ 1: exp "⊕" exp
↳ exp • "+" exp ↳ 3: exp • "+" exp
Reduce derivation Reduce derivation
exp exp
↳ exp "+" exp ↳ 2: exp "+" exp
↳ exp "⊕" exp • ↳ 1: exp "⊕" exp •
]]) ]])