build: flex.m4: check for Flex.

[bison.git] / tests / named-refs.at

# Named references test.                           -*- Autotest -*-

# Copyright (C) 2009-2012 Free Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# FIXME: Duplication with calc.at.
AT_BANNER([[Named references tests.]])

AT_SETUP([Tutorial calculator])

AT_DATA_GRAMMAR([test.y],
[[
%{
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
typedef int semantic_value;
FILE *input;
static semantic_value global_result = 0;
static int global_count = 0;
static int power (int base, int exponent);
static void yyerror (const char *s);
int yylex (void);
%}

%union
{
  semantic_value ival;
};

%token CALC_EOF 0 "end of input"
%token <ival> NUM "number"
%type  <ival> exp

%nonassoc '='   /* comparison	       */
%left '-' '+'
%left '*' '/'
%left NEG /* negation--unary minus */
%right '^'      /* exponentiation        */

%%
input:
  line
| input line         {  }
;

line:
  '\n'
| exp '\n'           {  }
;

exp:
  NUM                { $$ = $NUM; }
| exp[l] '=' exp[r]
  {
    if ($l != $r)
      fprintf (stderr, "calc: error: %d != %d\n", $l, $r);
   $$ = $l;
  }
| exp[x] '+' { $<ival>$ = $x; } [l] exp[r]  { $$ = $<ival>l + $r;    }
| exp[l] '-' exp[r]        { $$ = $l - $r;        }
| exp[l] '*' exp[r]        { $$ = $l * $r;        }
| exp[l] '/' exp[r]  { $$ = $l / $r;        }
| '-' exp  %prec NEG { $$ = -$2;            }
| exp[l] '^' exp[r]        { $$ = power ($l, $r); }
| '(' exp[e] ')'        { $$ = $e;           }
| '(' error ')'      { $$ = 1111; yyerrok;  }
| '!'                { $$ = 0; YYERROR;     }
| '-' error          { $$ = 0; YYERROR;     }
;
%%

static void yyerror (const char *s)
{
  fprintf (stderr, "%s\n", s);
}

static int get_char (void)
{
  int res = getc (input);
  return res;
}

static void unget_char (int c)
{
  ungetc (c, input);
}

static int read_signed_integer (void)
{
  int c = get_char ();
  int sign = 1;
  int n = 0;
  if (c == '-')
    {
      c = get_char ();
      sign = -1;
    }
  while (isdigit (c))
    {
      n = 10 * n + (c - '0');
      c = get_char ();
    }
  unget_char ( c);
  return sign * n;
}

int yylex (void)
{
  int c;
  /* Skip white space.  */
  while ((c = get_char ()) == ' ' || c == '\t') {}

  /* process numbers   */
  if (c == '.' || isdigit (c))
    {
      unget_char ( c);
      (yylval).ival = read_signed_integer ();
      return NUM;
    }

  /* Return end-of-file.  */
  if (c == EOF)
    return CALC_EOF;

  /* Return single chars. */
  return c;
}

static int power (int base, int exponent)
{
  int res = 1;
  assert (0 <= exponent);
  for (/* Niente */; exponent; --exponent)
    res *= base;
  return res;
}

int main (int argc, const char **argv)
{
  semantic_value result = 0;
  int count = 0;
  int status;
  if (argc == 2)
    input = fopen (argv[1], "r");
  else
    input = stdin;
  if (!input)
    {
      perror (argv[1]);
      return 3;
    }
  status = yyparse ();
  fclose (input);
  if (global_result != result)
    abort ();
  if (global_count != count)
    abort ();
  return status;
}
]])

AT_DATA([input.txt],
[[
1 + 2 * 3 = 7
1 + 2 * -3 = -5
-1^2 = -1
(-1)^2 = 1
---1 = -1
1 - 2 - 3 = -4
1 - (2 - 3) = 2
2^2^3 = 256
(2^2)^3 = 64
]])

AT_BISON_CHECK([-o test.c test.y])
AT_COMPILE([[test]])
AT_PARSER_CHECK([./test input.txt], 0, [], [stderr])
AT_CLEANUP



#######################################################################


AT_SETUP([Undefined and ambiguous references])

AT_DATA_GRAMMAR([test.y],
[[
%{
static int power (int base, int exponent);
static void yyerror (const char *s);
int yylex (void);
%}

%union
{
  int ival;
};

%token CALC_EOF 0 "end of input"
%token <ival> NUM "number"
%type  <ival> exp

%nonassoc '='   /* comparison	       */
%left '-' '+'
%left '*' '/'
%left NEG /* negation--unary minus */
%right '^'      /* exponentiation        */

%%
input:
  line
| input line         {  }
;

line:
  '\n'
| exp '\n'           {  }
;

exp:
  NUM { $$ = $NUM; }
| exp[l] '=' exp[r]
  {
    if ($l != $r)
      fprintf (stderr, "calc: error: %d != %d\n", $l, $r);
   $$ = $l;
  }
| exp[x] '+' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>lo9 + $r; }
| exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
| exp[x] '*' { $<ival>$ = $x; } [l] exp[r] { $$ = $l * $r; }
| exp[l] '/' exp[r]  { $$ = $l / $r;        }
| '-' exp  %prec NEG { $$ = -$2;            }
| exp[l] '^' exp[r]        { $$ = power ($l, $r12); }
| '(' exp ')'        { $$ = $expo;           }
| '(' error ')'      { $$ = 1111; yyerrok;  }
| '!'                { $$ = 0; YYERROR;     }
| '-' error          { $$ = 0; YYERROR;     }
;
%%
]])

AT_BISON_CHECK([-o test.c test.y], 1, [],
[[test.y:50.51-60: invalid reference: '$<ival>lo9'
test.y:50.3-68:      symbol not found in production: lo9
test.y:51.51-60: warning: misleading reference: '$<ival>exp'
test.y:42.1-3:       warning: refers to: $exp at $$
test.y:51.7:         warning: possibly meant: $x, hiding $exp at $1
test.y:51.41:        warning: possibly meant: $r, hiding $exp at $4
test.y:52.51-52: $l of 'exp' has no declared type
test.y:55.46-49: invalid reference: '$r12'
test.y:55.3-53:      symbol not found in production: r12
test.y:56.29-33: invalid reference: '$expo'
test.y:56.3-46:      symbol not found in production: expo
]])
AT_CLEANUP

#######################################################################

AT_SETUP([Misleading references])
AT_DATA_GRAMMAR([test.y],
[[
%%
start: foo foo.bar { $foo.bar; }
foo: '1'
foo.bar: '2'
]])
AT_BISON_CHECK([-o test.c test.y], 0, [],
[[test.y:11.22-29: warning: misleading reference: '$foo.bar'
test.y:11.8-10:      warning: refers to: $foo at $1
test.y:11.12-18:     warning: possibly meant: $[foo.bar] at $2
]])
AT_CLEANUP

#######################################################################

AT_SETUP([Many kinds of errors])
AT_DATA_GRAMMAR([test.y],
[[
%token IDENT
%token NUMBER
%token ASSIGNOP
%token IF
%token IF1
%token THEN
%token ELSE
%token FI
%token WHILE
%token DO
%token OD
%start program
%%
if_stmt1: IF expr[cond] THEN stmt[then] ELSE stmt.list[else] FI
          { $if_stmt1 = new IfStmt($cond1, $then.f1, $else); };
if_stmt2: IF expr[cond] THEN stmt[then] FI
          { $if_stmt2 = new IfStmt($cond, $stmt.field, 0); };
if_stmt3: IF expr[cond] THEN stmt.list FI
          { $if_stmt3 = new IfStmt($cond, $stmt.list, 0); };
if_stmt4: IF expr[cond] THEN stmt[xyz] ELSE stmt[xyz] FI
          { $if_stmt4 = new IfStmt($cond, $xyz, $cond); };
if_stmt5: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
          { $if_stmt5 = new IfStmt($cond, $stmt.list, $else); };
if_stmt6: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
          { $if_stmt6 = new IfStmt($cond, $stmt.list.field, $else); };
if_stmt7: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
          { $if_stmt7 = new IfStmt($cond, $[stmt.list].field, $else); };
if_stmt8: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
          { $if_stmt8 = new IfStmt($cond, $then.1, $else); };
if_stmt9: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
          { $if_stmt9 = new IfStmt($cond, $then.1.field, $else); };
if_stmt10: IF expr[cond] THEN stmt[stmt.x] FI
          { $if_stmt10 = new IfStmt($cond, $stmt.x, 0); };
if-stmt-a: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
          { $if-stmt-a = new IfStmt($cond, $then, $else); };
if-stmt-b: IF expr[cond] THEN if-stmt-a[then-a] ELSE stmt.list[else] FI
          { $[if-stmt-b] = new IfStmt($cond, $then-a.f, $else); };
program: stmt.list;
stmt.list:  stmt ';' stmt.list { $3->insert($stmt); $$ = $3; }
        |   stmt ';' { SL = new StmtList();  SL->insert($1); $$ = SL; }
        ;
stmt:  assign_stmt { $$ = $1; }
    |  if_stmt { $$ = $1; }
    |  if_stmt1 { $$ = $1; }
    |  while_stmt { $$ = $1; }
    ;
assign_stmt: IDENT ASSIGNOP expr
       { $$ = new AssignStmt(string($1),$3); };
if_stmt: IF expr[cond] THEN stmt.list FI
       { $if_stmt = new IfStmt($cond, $[stmt.list], 0); };
while_stmt[res]: WHILE expr DO stmt.list OD
       { $res = new WhileStmt($[expr], $[stmt.list]); };
expr: expr '+' term   { $$ = new Plus($1,$3); }
    | expr '-' term   { $$ = new Minus($1,$3); }
    | term            { $$ = $1; }
    ;
term: term '*' factor   { $$ = new Times($1,$3); }
    | factor            { $$ = $1; }
    ;
factor:     '(' expr ')'  { $$ = $2; }
    |       NUMBER { $$ = new Number($1); }
    |       IDENT { $$ = new Ident(string($1)); }
    ;
]])
AT_BISON_CHECK([-o test.c test.y], 1, [],
[[test.y:24.36-41: invalid reference: '$cond1'
test.y:23.11-24.62:  symbol not found in production: cond1
test.y:26.43-53: invalid reference: '$stmt.field'
test.y:25.11-26.60:  symbol not found in production: stmt
test.y:25.35-38:     possibly meant: $then.field, hiding $stmt.field at $4
test.y:28.43-52: invalid reference: '$stmt.list'
test.y:27.11-28.59:  symbol not found in production: stmt
test.y:27.30-38:     possibly meant: $[stmt.list] at $4
test.y:30.43-46: ambiguous reference: '$xyz'
test.y:29.35-37:     refers to: $xyz at $4
test.y:29.50-52:     refers to: $xyz at $6
test.y:32.43-52: invalid reference: '$stmt.list'
test.y:31.11-32.63:  symbol not found in production: stmt
test.y:31.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
test.y:31.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
test.y:34.43-58: invalid reference: '$stmt.list.field'
test.y:33.11-34.69:  symbol not found in production: stmt
test.y:33.40-43:     possibly meant: $then.field, hiding $[stmt.list].field at $4
test.y:33.61-64:     possibly meant: $else.field, hiding $[stmt.list].field at $6
test.y:36.43-54: invalid reference: '$[stmt.list]'
test.y:35.11-36.71:  symbol not found in production: stmt.list
test.y:35.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
test.y:35.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
test.y:38.43-49: invalid reference: '$then.1'
test.y:37.11-38.60:  symbol not found in production: then
test.y:37.40-45:     possibly meant: $[then.1] at $4
test.y:40.43-55: invalid reference: '$then.1.field'
test.y:39.11-40.66:  symbol not found in production: then
test.y:39.40-45:     possibly meant: $[then.1].field at $4
test.y:42.44-50: invalid reference: '$stmt.x'
test.y:41.12-42.57:  symbol not found in production: stmt
test.y:41.36-41:     possibly meant: $[stmt.x].x, hiding $stmt.x at $4
test.y:41.36-41:     possibly meant: $[stmt.x] at $4
test.y:44.13-22: invalid reference: '$if-stmt-a'
test.y:43.12-44.59:  symbol not found in production: if
test.y:43.1-9:       possibly meant: $[if-stmt-a] at $$
test.y:46.46-54: invalid reference: '$then-a.f'
test.y:45.12-46.65:  symbol not found in production: then
test.y:45.41-46:     possibly meant: $[then-a].f at $4
]])
AT_CLEANUP

#######################################################################

AT_SETUP([Missing identifiers in brackets])
AT_DATA_GRAMMAR([test.y],
[[
%%
start: foo[] bar
  { s = $foo; }
]])
AT_BISON_CHECK([-o test.c test.y], 1, [],
[[test.y:11.12: an identifier expected
]])
AT_CLEANUP

#######################################################################

AT_SETUP([Redundant words in brackets])
AT_DATA_GRAMMAR([test.y],
[[
%%
start: foo[ a d ] bar
  { s = $foo; }
]])
AT_BISON_CHECK([-o test.c test.y], 1, [],
[[test.y:11.15: unexpected identifier in bracketed name: 'd'
]])
AT_CLEANUP

#######################################################################

AT_SETUP([Comments in brackets])
AT_DATA_GRAMMAR([test.y],
[[
%%
start: foo[/* comment */] bar
  { s = $foo; }
]])
AT_BISON_CHECK([-o test.c test.y], 1, [],
[[test.y:11.25: an identifier expected
]])
AT_CLEANUP

#######################################################################

AT_SETUP([Stray symbols in brackets])
AT_DATA_GRAMMAR([test.y],
[[
%%
start: foo[ /* aaa */ *&-.+ ] bar
  { s = $foo; }
]])
AT_BISON_CHECK([-o test.c test.y], 1, [],
[[test.y:11.23: invalid character in bracketed name: '*'
test.y:11.24: invalid character in bracketed name: '&'
test.y:11.25: invalid character in bracketed name: '-'
test.y:11.27: invalid character in bracketed name: '+'
]])
AT_CLEANUP

#######################################################################

AT_SETUP([Redundant words in LHS brackets])
AT_DATA_GRAMMAR([test.y],
[[
%%
start[a s]: foo;
]])
AT_BISON_CHECK([-o test.c test.y], 1, [],
[[test.y:11.9: unexpected identifier in bracketed name: 's'
]])
AT_CLEANUP

#######################################################################

# Bison used to free twice the named ref for "a", since a single copy
# was used in two rules.
AT_SETUP([Factored LHS])
AT_DATA_GRAMMAR([test.y],
[[
%%
start[a]: "foo" | "bar";
]])
AT_BISON_CHECK([-o test.c test.y])
AT_CLEANUP

#######################################################################

AT_SETUP([Unresolved references])
AT_DATA_GRAMMAR([test.y],
[[
%%
stat:
  sym_a sym_b { func($sym.field); }
| sym_a sym_b { func($<aa>sym.field); }
| sym_a sym_b { func($[sym.field]); }
| sym_a sym_b { func($<aa>[sym.field]); }
| sym_a sym_b { func($sym); }
| sym_a sym_b { func($<aa>sym); }
| sym_a sym_b { func($[sym]); } sym_a sym_b { func($<aa>[sym]); }
;

stat1:
  sym_a sym_b { func($sym-field); }
| sym_a sym_b { func($<aa>sym-field); }
| sym_a sym_b { func($[sym-field]); }
| sym_a sym_b { func($<aa>[sym-field]); }
| sym_a sym_b { func($sym); }
| sym_a sym_b { func($<aa>sym); }
| sym_a sym_b { func($[sym]); } sym_a sym_b { func($<aa>[sym]); }
;

sym_a: 'a';
sym_b: 'b';
]])
AT_BISON_CHECK([-o test.c test.y], 1, [],
[[test.y:12.22-31: invalid reference: '$sym.field'
test.y:12.3-35:      symbol not found in production: sym
test.y:13.22-35: invalid reference: '$<aa>sym.field'
test.y:13.3-39:      symbol not found in production: sym
test.y:14.22-33: invalid reference: '$[sym.field]'
test.y:14.3-37:      symbol not found in production: sym.field
test.y:15.22-37: invalid reference: '$<aa>[sym.field]'
test.y:15.3-41:      symbol not found in production: sym.field
test.y:16.22-25: invalid reference: '$sym'
test.y:16.3-29:      symbol not found in production: sym
test.y:17.22-29: invalid reference: '$<aa>sym'
test.y:17.3-33:      symbol not found in production: sym
test.y:18.22-27: invalid reference: '$[sym]'
test.y:18.3-65:      symbol not found in production before $3: sym
test.y:18.52-61: invalid reference: '$<aa>[sym]'
test.y:18.3-65:      symbol not found in production: sym
test.y:22.22-31: invalid reference: '$sym-field'
test.y:22.3-35:      symbol not found in production: sym
test.y:23.22-35: invalid reference: '$<aa>sym-field'
test.y:23.3-39:      symbol not found in production: sym
test.y:24.22-33: invalid reference: '$[sym-field]'
test.y:24.3-37:      symbol not found in production: sym-field
test.y:25.22-37: invalid reference: '$<aa>[sym-field]'
test.y:25.3-41:      symbol not found in production: sym-field
test.y:26.22-25: invalid reference: '$sym'
test.y:26.3-29:      symbol not found in production: sym
test.y:27.22-29: invalid reference: '$<aa>sym'
test.y:27.3-33:      symbol not found in production: sym
test.y:28.22-27: invalid reference: '$[sym]'
test.y:28.3-65:      symbol not found in production before $3: sym
test.y:28.52-61: invalid reference: '$<aa>[sym]'
test.y:28.3-65:      symbol not found in production: sym
]])
AT_CLEANUP

#######################################################################

AT_SETUP([[$ or @ followed by . or -]])
AT_DATA([[test.y]],
[[
%%
start:
  .field { $.field; }
| 'a'    { @.field; }
;
.field: ;
]])
AT_BISON_CHECK([[test.y]], [[1]], [],
[[test.y:4.12-18: invalid reference: '$.field'
test.y:4.13:        syntax error after '$', expecting integer, letter, '_', '@<:@', or '$'
test.y:4.3-8:       possibly meant: $[.field] at $1
test.y:5.12-18: invalid reference: '@.field'
test.y:5.13:        syntax error after '@', expecting integer, letter, '_', '@<:@', or '$'
]])
AT_DATA([[test.y]],
[[
%%
start:
  'a' { $-field; }
| 'b' { @-field; }
;
]])
AT_BISON_CHECK([[test.y]], [[0]], [],
[[test.y:4.9: warning: stray '$'
test.y:5.9: warning: stray '@'
]])
AT_CLEANUP