* doc/bison.texinfo (Debugging):

[bison.git] / tests / regression.at

diff --git a/tests/regression.at b/tests/regression.at
index 8981874542b14b9f01e6083b22038d0a683d7f2e..7617012476fc29c0dc7fcf41febf9e12529657e4 100644 (file)
--- a/tests/regression.at
+++ b/tests/regression.at
@@ -25,7 +25,7 @@ AT_BANNER([[Regression tests.]])
 
 AT_SETUP([Duplicate string])
 
 
 AT_SETUP([Duplicate string])
 

-AT_DATA([duplicate.y],
+AT_DATA([input.y],

 [[/* `Bison -v' used to dump core when two tokens are defined with the same
    string, as LE and GE below. */
 
 [[/* `Bison -v' used to dump core when two tokens are defined with the same
    string, as LE and GE below. */
 


@@ -38,77 +38,446 @@ exp: '(' exp ')' | NUM ;
 %%
 ]])
 
 %%
 ]])
 

-AT_CHECK([bison -v duplicate.y -o duplicate.c], 0, ignore, ignore)
+AT_CHECK([bison -v input.y -o input.c], 0, ignore, ignore)

 
 

-AT_CLEANUP([duplicate.*])
+AT_CLEANUP

 
 
 
 

+## ------------------------- ##
+## Unresolved SR Conflicts.  ##
+## ------------------------- ##
+
+AT_SETUP([Unresolved SR Conflicts])
+
+AT_DATA([input.y],
+[[%token NUM OP
+%%
+exp: exp OP exp | NUM;
+]])
+
+AT_CHECK([bison input.y -o input.c -v], 0, [],
+[input.y contains 1 shift/reduce conflict.
+])
+
+# Check the contents of the report.
+AT_CHECK([cat input.output], [],
+[[State 5 contains 1 shift/reduce conflict.
+
+
+Grammar
+
+  Number, Line, Rule
+    0   3 $axiom -> exp $
+    1   3 exp -> exp OP exp
+    2   3 exp -> NUM
+
+
+Terminals, with rules where they appear
+
+$ (0) 0
+error (256)
+NUM (257) 2
+OP (258) 1
+
+
+Nonterminals, with rules where they appear
+
+$axiom (5)
+    on left: 0
+exp (6)
+    on left: 1 2, on right: 0 1
+
+
+state 0
+
+    NUM        shift, and go to state 1
+
+    exp        go to state 2
+
+
+
+state 1
+
+    exp  ->  NUM .   (rule 2)
+
+    $default   reduce using rule 2 (exp)
+
+
+
+state 2
+
+    $axiom  ->  exp . $   (rule 0)
+    exp  ->  exp . OP exp   (rule 1)
+
+    $          shift, and go to state 3
+    OP         shift, and go to state 4
+
+
+
+state 3
+
+    $axiom  ->  exp $ .   (rule 0)
+
+    $default   accept
+
+
+state 4
+
+    exp  ->  exp OP . exp   (rule 1)
+
+    NUM        shift, and go to state 1
+
+    exp        go to state 5
+
+
+
+state 5
+
+    exp  ->  exp . OP exp   (rule 1)
+    exp  ->  exp OP exp .   (rule 1)
+
+    OP         shift, and go to state 4
+
+    OP         [reduce using rule 1 (exp)]
+    $default   reduce using rule 1 (exp)
+
+
+
+]])
+
+AT_CLEANUP
+
+
+## --------------------- ##
+## Solved SR Conflicts.  ##
+## --------------------- ##
+
+AT_SETUP([Solved SR Conflicts])
+
+AT_DATA([input.y],
+[[%token NUM OP
+%right OP
+%%
+exp: exp OP exp | NUM;
+]])
+
+AT_CHECK([bison input.y -o input.c -v], 0, [], [])
+
+# Check the contents of the report.
+AT_CHECK([cat input.output], [],
+[[Conflict in state 5 between rule 2 and token OP resolved as shift.
+
+
+Grammar
+
+  Number, Line, Rule
+    0   4 $axiom -> exp $
+    1   4 exp -> exp OP exp
+    2   4 exp -> NUM

 
 

-## ---------------------- ##
-## %union and --defines.  ##
-## ---------------------- ##

 
 

+Terminals, with rules where they appear

 
 

-AT_SETUP([%union and --defines])
+$ (0) 0
+error (256)
+NUM (257) 2
+OP (258) 1
+
+
+Nonterminals, with rules where they appear
+
+$axiom (5)
+    on left: 0
+exp (6)
+    on left: 1 2, on right: 0 1
+
+
+state 0
+
+    NUM        shift, and go to state 1
+
+    exp        go to state 2
+
+
+
+state 1
+
+    exp  ->  NUM .   (rule 2)
+
+    $default   reduce using rule 2 (exp)
+
+
+
+state 2
+
+    $axiom  ->  exp . $   (rule 0)
+    exp  ->  exp . OP exp   (rule 1)
+
+    $          shift, and go to state 3
+    OP         shift, and go to state 4
+
+
+
+state 3
+
+    $axiom  ->  exp $ .   (rule 0)
+
+    $default   accept
+
+
+state 4
+
+    exp  ->  exp OP . exp   (rule 1)
+
+    NUM        shift, and go to state 1
+
+    exp        go to state 5
+
+
+
+state 5
+
+    exp  ->  exp . OP exp   (rule 1)
+    exp  ->  exp OP exp .   (rule 1)
+
+    OP         shift, and go to state 4
+
+    $default   reduce using rule 1 (exp)
+
+
+
+]])
+
+AT_CLEANUP
+
+
+
+
+## ------------------- ##
+## Rule Line Numbers.  ##
+## ------------------- ##
+
+AT_SETUP([Rule Line Numbers])
+
+AT_DATA([input.y],
+[[%%
+expr:
+'a'

 
 

-AT_DATA([union.y],
-[%union

 {
 {

-  int   integer;
-  char *string ;
+

 }
 }

-%%
-exp: {};
-])

 
 

-AT_CHECK([bison --defines union.y])
+'b'

 
 

-AT_CLEANUP([union.*])
+{

 
 

+}

 
 

-## --------------------------------------- ##
-## Duplicate '/' in C comments in %union   ##
-## --------------------------------------- ##
+|

 
 
 
 

-AT_SETUP([%union and C comments])
+{
+
+
+}
+
+'c'

 
 

-AT_DATA([union-comment.y],
-[%union

 {
 {

-  /* The int.  */      int   integer;
-  /* The string.  */   char *string ;
+

 }
 }

-%%
-exp: {};
-])
+]])
+
+AT_CHECK([bison input.y -o input.c -v], 0, [], [])
+
+# Check the contents of the report.
+AT_CHECK([cat input.output], [],
+[[Grammar
+
+  Number, Line, Rule
+    0   2 $axiom -> expr $
+    1   2 @1 -> /* empty */
+    2   2 expr -> 'a' @1 'b'
+    3  15 @2 -> /* empty */
+    4  15 expr -> @2 'c'
+
+
+Terminals, with rules where they appear
+
+$ (0) 0
+'a' (97) 2
+'b' (98) 2
+'c' (99) 4
+error (256)
+
+
+Nonterminals, with rules where they appear
+
+$axiom (6)
+    on left: 0
+expr (7)
+    on left: 2 4, on right: 0
+@1 (8)
+    on left: 1, on right: 2
+@2 (9)
+    on left: 3, on right: 4

 
 

-AT_CHECK([bison union-comment.y])
-AT_CHECK([fgrep '//*' union-comment.tab.c], [1], [])

 
 

-AT_CLEANUP([union-comment.*])
+state 0
+
+    'a'        shift, and go to state 1
+
+    $default   reduce using rule 3 (@2)
+
+    expr       go to state 2
+    @2         go to state 3
+
+
+
+state 1
+
+    expr  ->  'a' . @1 'b'   (rule 2)
+
+    $default   reduce using rule 1 (@1)
+
+    @1         go to state 4
+
+
+
+state 2
+
+    $axiom  ->  expr . $   (rule 0)
+
+    $          shift, and go to state 5
+
+
+
+state 3
+
+    expr  ->  @2 . 'c'   (rule 4)
+
+    'c'        shift, and go to state 6
+
+
+
+state 4
+
+    expr  ->  'a' @1 . 'b'   (rule 2)
+
+    'b'        shift, and go to state 7
+
+
+
+state 5
+
+    $axiom  ->  expr $ .   (rule 0)
+
+    $default   accept
+
+
+state 6
+
+    expr  ->  @2 'c' .   (rule 4)
+
+    $default   reduce using rule 4 (expr)
+
+
+
+state 7
+
+    expr  ->  'a' @1 'b' .   (rule 2)
+
+    $default   reduce using rule 2 (expr)
+
+
+
+]])
+
+AT_CLEANUP
+
+
+
+## -------------------- ##
+## %expect not enough.  ##
+## -------------------- ##
+
+AT_SETUP([%expect not enough])
+
+AT_DATA([input.y],
+[[%token NUM OP
+%expect 0
+%%
+exp: exp OP exp | NUM;
+]])
+
+AT_CHECK([bison input.y -o input.c], 1, [],
+[input.y contains 1 shift/reduce conflict.
+expected 0 shift/reduce conflicts
+])
+AT_CLEANUP

 
 
 ## --------------- ##
 
 
 ## --------------- ##

-## invalid input.  ##
+## %expect right.  ##

 ## --------------- ##
 
 ## --------------- ##
 

+AT_SETUP([%expect right])

 
 

-AT_SETUP([Invalid input])
+AT_DATA([input.y],
+[[%token NUM OP
+%expect 1
+%%
+exp: exp OP exp | NUM;
+]])
+
+AT_CHECK([bison input.y -o input.c], 0)
+AT_CLEANUP
+
+
+## ------------------ ##
+## %expect too much.  ##
+## ------------------ ##
+
+AT_SETUP([%expect too much])

 
 AT_DATA([input.y],
 
 AT_DATA([input.y],

-[[%%
-?
+[[%token NUM OP
+%expect 2
+%%
+exp: exp OP exp | NUM;

 ]])
 
 ]])
 

-AT_CHECK([bison input.y], [1], [],
-[input.y:2: invalid input: `?'
-input.y:3: fatal error: no rules in the input grammar
+AT_CHECK([bison input.y -o input.c], 1, [],
+[input.y contains 1 shift/reduce conflict.
+expected 2 shift/reduce conflicts

 ])
 ])

+AT_CLEANUP
+
+
+## ---------------------- ##
+## Mixing %token styles.  ##
+## ---------------------- ##
+
+
+AT_SETUP([Mixing %token styles])
+
+# Taken from the documentation.
+AT_DATA([input.y],
+[[%token  <operator>  OR      "||"
+%token  <operator>  LE 134  "<="
+%left  OR  "<="
+%%
+exp: ;
+%%
+]])
+
+AT_CHECK([bison -v input.y -o input.c], 0, ignore, ignore)

 
 AT_CLEANUP
 
 
 
 AT_CLEANUP
 
 

+

 ## ----------------- ##
 ## Invalid input 1.  ##
 ## ----------------- ##
 ## ----------------- ##
 ## Invalid input 1.  ##
 ## ----------------- ##


@@ -122,9 +491,9 @@ AT_DATA([input.y],
 ]])
 
 AT_CHECK([bison input.y], [1], [],
 ]])
 
 AT_CHECK([bison input.y], [1], [],

-[input.y:2: invalid input: `?'
+[[input.y:2: invalid input: `?'

 input.y:3: fatal error: no rules in the input grammar
 input.y:3: fatal error: no rules in the input grammar

-])
+]])

 
 AT_CLEANUP
 
 
 AT_CLEANUP
 


@@ -142,29 +511,265 @@ default: 'a' }
 ]])
 
 AT_CHECK([bison input.y], [1], [],
 ]])
 
 AT_CHECK([bison input.y], [1], [],

-[input.y:2: invalid input: `}'
-])
+[[input.y:2: invalid input: `}'
+]])

 
 AT_CLEANUP
 
 
 
 AT_CLEANUP
 
 

-## --------------------- ##
-## Invalid CPP headers.  ##
-## --------------------- ##

 
 

-AT_SETUP([Invalid CPP headers])
+## -------------------- ##
+## Invalid %directive.  ##
+## -------------------- ##

 
 

-mkdir input

 
 

-AT_DATA([input/input.y],
-[%%
-dummy:
-])
+AT_SETUP([Invalid %directive])
+
+AT_DATA([input.y],
+[[%invalid
+]])
+
+AT_CHECK([bison input.y], [1], [],
+[[input.y:1: unrecognized: %invalid
+input.y:1:    Skipping to next %
+input.y:2: fatal error: no input grammar
+]])
+
+AT_CLEANUP
+
+
+
+## -------------- ##
+## Web2c Report.  ##
+## -------------- ##
+
+# The generation of the reduction was once wrong in Bison, and made it
+# miss some reductions.  In the following test case, the reduction on
+# `undef_id_tok' in state 1 was missing.  This is stripped down from
+# the actual web2c.y.
+
+AT_SETUP([Web2c Report])
+
+AT_DATA([input.y],
+[[%token       undef_id_tok const_id_tok
+
+%start CONST_DEC_PART
+\f
+%%
+CONST_DEC_PART:
+         CONST_DEC_LIST
+        ;
+
+CONST_DEC_LIST:
+         CONST_DEC
+        | CONST_DEC_LIST CONST_DEC
+        ;
+
+CONST_DEC:
+         { } undef_id_tok '=' const_id_tok ';'
+        ;
+%%
+
+]])
+
+AT_CHECK([bison -v input.y])
+
+AT_CHECK([sed -n 's/  *$//;/^$/!p' input.output], 0,
+[[Grammar
+  Number, Line, Rule
+    0   6 $axiom -> CONST_DEC_PART $
+    1   6 CONST_DEC_PART -> CONST_DEC_LIST
+    2  10 CONST_DEC_LIST -> CONST_DEC
+    3  12 CONST_DEC_LIST -> CONST_DEC_LIST CONST_DEC
+    4  15 @1 -> /* empty */
+    5  15 CONST_DEC -> @1 undef_id_tok '=' const_id_tok ';'
+Terminals, with rules where they appear
+$ (0) 0
+';' (59) 5
+'=' (61) 5
+error (256)
+undef_id_tok (257) 5
+const_id_tok (258) 5
+Nonterminals, with rules where they appear
+$axiom (7)
+    on left: 0
+CONST_DEC_PART (8)
+    on left: 1, on right: 0
+CONST_DEC_LIST (9)
+    on left: 2 3, on right: 1 3
+CONST_DEC (10)
+    on left: 5, on right: 2 3
+@1 (11)
+    on left: 4, on right: 5
+state 0
+    $default   reduce using rule 4 (@1)
+    CONST_DEC_PART     go to state 1
+    CONST_DEC_LIST     go to state 2
+    CONST_DEC  go to state 3
+    @1         go to state 4
+state 1
+    $axiom  ->  CONST_DEC_PART . $   (rule 0)
+    $          shift, and go to state 5
+state 2
+    CONST_DEC_PART  ->  CONST_DEC_LIST .   (rule 1)
+    CONST_DEC_LIST  ->  CONST_DEC_LIST . CONST_DEC   (rule 3)
+    undef_id_tok       reduce using rule 4 (@1)
+    $default   reduce using rule 1 (CONST_DEC_PART)
+    CONST_DEC  go to state 6
+    @1         go to state 4
+state 3
+    CONST_DEC_LIST  ->  CONST_DEC .   (rule 2)
+    $default   reduce using rule 2 (CONST_DEC_LIST)
+state 4
+    CONST_DEC  ->  @1 . undef_id_tok '=' const_id_tok ';'   (rule 5)
+    undef_id_tok       shift, and go to state 7
+state 5
+    $axiom  ->  CONST_DEC_PART $ .   (rule 0)
+    $default   accept
+state 6
+    CONST_DEC_LIST  ->  CONST_DEC_LIST CONST_DEC .   (rule 3)
+    $default   reduce using rule 3 (CONST_DEC_LIST)
+state 7
+    CONST_DEC  ->  @1 undef_id_tok . '=' const_id_tok ';'   (rule 5)
+    '='        shift, and go to state 8
+state 8
+    CONST_DEC  ->  @1 undef_id_tok '=' . const_id_tok ';'   (rule 5)
+    const_id_tok       shift, and go to state 9
+state 9
+    CONST_DEC  ->  @1 undef_id_tok '=' const_id_tok . ';'   (rule 5)
+    ';'        shift, and go to state 10
+state 10
+    CONST_DEC  ->  @1 undef_id_tok '=' const_id_tok ';' .   (rule 5)
+    $default   reduce using rule 5 (CONST_DEC)
+]])
+
+AT_CLEANUP
+
+
+## --------------- ##
+## Web2c Actions.  ##
+## --------------- ##

 
 

-AT_CHECK([bison --defines input/input.y])
+# The generation of the mapping `state -> action' was once wrong in
+# extremely specific situations.  web2c.y exhibits this situation.
+# Below is a stripped version of the grammar.  It looks like one can
+# simplify it further, but just don't: it is tuned to exhibit a bug,
+# which disapears when applying sane grammar transformations.
+#
+# It used to be wrong on yydefact only:
+#
+# static const short yydefact[] =
+#  {
+# -       2,     0,     1,     0,     0,     2,     3,     2,     5,     4,
+# +       2,     0,     1,     0,     0,     0,     3,     2,     5,     4,
+#         0,     0
+#  };
+#
+# but let's check all the tables.
+
+
+AT_SETUP([Web2c Actions])

 
 

-AT_CHECK([sed 1q input/input.tab.h], 0,
-[[#ifndef INPUT_INPUT_TAB_H
+AT_DATA([input.y],
+[[%%
+statement:  struct_stat;
+struct_stat:  /* empty. */ | if else;
+if: "if" "const" "then" statement;
+else: "else" statement;
+%%

 ]])
 
 ]])
 

-AT_CLEANUP(input)
+AT_CHECK([bison -v input.y -o input.c])
+
+# Check only the tables.  We don't use --no-parser, because it is
+# still to be implemented in the experimental branch of Bison.
+AT_CHECK([[sed -n 's/  *$//;/^static const.*\[\] =/,/^}/p' input.c]], 0,
+[[static const char yytranslate[] =
+{
+       0,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     1,     3,     4,     5,
+       6
+};
+static const short yyprhs[] =
+{
+       0,     0,     3,     5,     6,     9,    14
+};
+static const short yyrhs[] =
+{
+       8,     0,    -1,     9,    -1,    -1,    10,    11,    -1,     3,
+       4,     5,     8,    -1,     6,     8,    -1
+};
+static const short yyrline[] =
+{
+       0,     2,     2,     3,     3,     4,     5
+};
+static const char *const yytname[] =
+{
+  "$", "error", "$undefined.", "\"if\"", "\"const\"", "\"then\"",
+  "\"else\"", "$axiom", "statement", "struct_stat", "if", "else", NULL
+};
+static const short yytoknum[] =
+{
+       0,   256,     2,   257,   258,   259,   260,    -1
+};
+static const short yyr1[] =
+{
+       0,     7,     8,     9,     9,    10,    11
+};
+static const short yyr2[] =
+{
+       0,     2,     1,     0,     2,     4,     2
+};
+static const short yydefact[] =
+{
+       3,     0,     0,     2,     0,     0,     0,     3,     4,     3,
+       6,     5
+};
+static const short yydefgoto[] =
+{
+      -1,     2,     3,     4,     8
+};
+static const short yypact[] =
+{
+      -2,    -1,     4,-32768,     0,     2,-32768,    -2,-32768,    -2,
+  -32768,-32768
+};
+static const short yypgoto[] =
+{
+  -32768,    -7,-32768,-32768,-32768
+};
+static const short yytable[] =
+{
+      10,     1,    11,     5,     6,     0,     7,     9
+};
+static const short yycheck[] =
+{
+       7,     3,     9,     4,     0,    -1,     6,     5
+};
+]])
+
+AT_CLEANUP