doc: fixes in the C++ part

[bison.git] / tests / types.at

# Value type.                                     -*- Autotest -*-

# Copyright (C) 2013-2015 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/>.

AT_BANNER([[Value type tests.]])


## ----------------------------------- ##
## %union vs. %define api.value.type.  ##
## ----------------------------------- ##

AT_SETUP([[%union vs. %define api.value.type]])

AT_DATA([[input.y]],
[[%union { int ival; }
%define api.value.type union-directive
%%
exp: %empty;
]])

AT_BISON_CHECK([[input.y]], [[1]], [[]],
[[input.y:2.9-22: error: '%union' and '%define api.value.type' cannot be used together
]])

AT_CLEANUP

## ---------------------------------------- ##
## %yacc vs. %define api.value.type union.  ##
## ---------------------------------------- ##

AT_SETUP([[%yacc vs. %define api.value.type union]])

AT_DATA([[input.y]],
[[%yacc
%define api.value.type union
%%
exp: %empty;
]])

AT_BISON_CHECK([[input.y]], [[1]], [[]],
[[input.y:2.9-22: error: '%yacc' and '%define api.value.type "union"' cannot be used together
]])

AT_CLEANUP


## ---------------- ##
## api.value.type.  ##
## ---------------- ##

# _AT_TEST($1: BISON-DIRECTIVES,
#          $2: MORE-BISON-DIRECTIVES,
#          $3: PARSER-ACTION,
#          $4: INPUT,
#          $5: SCANNER-ACTION,
#          $6: RESULT)
# --------------------------------------
# Compile the grammar and check the expected result.
# BISON-DIRECTIVES are passed to AT_SETUP, contrary to MORE-BISON-DIRECTIVES.
m4_pushdef([_AT_TEST],
[
AT_SETUP([$1])
AT_KEYWORDS([api.value.type])
AT_BISON_OPTION_PUSHDEFS([%debug $1 $2])
AT_DATA_GRAMMAR([test.y],
[[%debug

%code
{
# include <stdio.h>
# include <stdlib.h>
]AT_YYERROR_DECLARE[
]AT_YYLEX_DECLARE[
}

]$1[
]$2[

%%

start: $3;

%%
]AT_YYERROR_DEFINE[
]AT_YYLEX_DEFINE([$4], [$5])[
]AT_MAIN_DEFINE[
]])

AT_FULL_COMPILE([[test]])
AT_PARSER_CHECK([./test], 0, [$6
], [stderr])
AT_BISON_OPTION_POPDEFS
AT_CLEANUP
])

# AT_TEST($1: BISON-DIRECTIVES,
#         $2: MORE-BISON-DIRECTIVES,
#         $3: PARSER-ACTION,
#         $4: INPUT,
#         $5: SCANNER-ACTION,
#         $6: RESULT)
# --------------------------------------
# Check with and without %defines, to avoid regressions.  It turns out
# that in that case yacc.c calls the set-up of the %union twice,
# because YYSTYPE is defined once in the header, and once in the
# implementation file (eventually it'd be better to include the header
# file, but that's another story).  Unfortunately running these macros
# a second time doubled the side-effects and resulted in a double
# definition of the union members.
m4_pushdef([AT_TEST],
[_AT_TEST([$1],          [$2], [$3], [$4], [$5], [$6])
 _AT_TEST([$1 %defines], [$2], [$3], [$4], [$5], [$6])
])

m4_foreach([b4_skel], [[yacc.c], [glr.c], [lalr1.cc], [glr.cc]],
 [# A built-in type.
  AT_TEST([%skeleton "]b4_skel["
           %define api.value.type {double}],
          [],
          ['1' '2' { printf ("%2.1f\n", $1 + $2); }],
          ["12"],
          [AT_VAL = (res - '0') / 10.0],
          [0.3])

  # A typedef which looks like a Bison keyword, but it's using braces.
  AT_TEST([%skeleton "]b4_skel["
           %define api.value.type {variant}],
          [%code requires { typedef double variant; }],
          ['1' '2' { printf ("%2.1f\n", $1 + $2); }],
          ["12"],
          [AT_VAL = (res - '0') / 10.0],
          [0.3])

  # A user defined struct.
  AT_TEST([%skeleton "]b4_skel["
           %define api.value.type {struct foo}],
          [%code requires { struct foo { float fval; int ival; }; }],
          ['1' '2'
             { printf ("%d %2.1f\n", $1.ival + $2.ival, $1.fval + $2.fval); }],
          ["12"],
          [AT_VAL.ival = (res - '0') * 10;
           AT_VAL.fval = (res - '0') / 10.f],
          [30 0.3])

  # A user defined struct that uses pointers.
  AT_TEST([%skeleton "]b4_skel["
           %define api.value.type {struct bar}],
          [%code requires
           {
             struct u
             {
               int ival;
             };
             struct bar
             {
               struct u *up;
             };
           }
           %token <up->ival> '1' '2'
           %printer { ]AT_SKEL_CC_IF([[yyoutput << $$]],
                                     [[fprintf (yyo, "%d", $$)]])[; } <up->ival>
           ],
          ['1' '2'
           {
             printf ("%d %d\n", $1, $<up->ival>2);
             free ($<up>1);
             free ($<up>2);
           }],
          ["12"],
          [AT_VAL.up = (struct u *) malloc (sizeof *AT_VAL.up);
           assert (AT_VAL.up);
           AT_VAL.up->ival = res - '0';],
          [1 2])

  # A user defined union.
  AT_TEST([%skeleton "]b4_skel["
           %define api.value.type {union foo}],
          [%code requires { union foo { float fval; int ival; }; }],
          ['1' '2' { printf ("%d %2.1f\n", $1.ival, $2.fval); }],
          ["12"],
          [if (res == '1')
             AT_VAL.ival = 10;
           else
             AT_VAL.fval = .2f],
          [10 0.2])

  # A %union and a named %union.  In C++ named %union is an error.
  m4_foreach([b4_union],
             [m4_bmatch(b4_skel, [\.cc$],
                       [[%union]],
                        [[%union], [%union foo],
                         [%define api.value.union.name foo; %union]])],
   [AT_TEST([%skeleton "]b4_skel["
             ]b4_union[ { float fval; int ival; };],
            [%token <ival> '1';
             %token <fval> '2';],
            ['1' '2' { printf ("%d %2.1f\n", $1, $2); }],
            ["12"],
            [if (res == '1')
               AT_VAL.ival = 10;
             else
               AT_VAL.fval = 0.2f],
            [10 0.2])])

  # A Bison-defined union.
  # The tokens names are not available directly in C++, we use their
  # user number to keep it simple between C and C++.
  AT_TEST([%skeleton "]b4_skel["
           %define api.value.type union],
          [%token <int> ONE 101;
           %token <float> TWO 102 THREE 103;
           %printer { ]AT_SKEL_CC_IF([[yyoutput << $$]],
                                     [[fprintf (yyo, "%d", $$)]])[; } <int>
           %printer { ]AT_SKEL_CC_IF([[yyoutput << $$]],
                                     [[fprintf (yyo, "%f", $$)]])[; } <float>
          ],
          [ONE TWO THREE { printf ("%d %2.1f %2.1f\n", $1, $2, $3); }],
          [{ 101, 102, 103, EOF }],
          [if (res == 101)
             AT_VAL.ONE = 10;
           else if (res == 102)
             AT_VAL.TWO = .2f;
           else if (res == 103)
             AT_VAL.THREE = 3.3f],
          [10 0.2 3.3])

  # A Bison-defined variant, for lalr1.cc only.
  m4_if(b4_skel, [lalr1.cc], [
  AT_TEST([%skeleton "]b4_skel["
           %define api.value.type variant],
          [%token <int> '1';
           %token <std::string> '2';],
          ['1' '2' { std::cout << $1 << ", " << $2 << std::endl; }],
          ["12"],
          [if (res == '1')
             AT_VAL.build(10);
           else
             AT_VAL.build<std::string>("two");],
          [10, two])])
])

m4_popdef([AT_TEST])
m4_popdef([_AT_TEST])


## ------------------- ##
## C++: Named %union.  ##
## ------------------- ##

m4_foreach([b4_skel], [[lalr1.cc], [glr.cc]],
[AT_SETUP([b4_skel: Named %union])
AT_DATA([input.y],
[%skeleton "]b4_skel["
%union foo { float fval; int ival; };
%%
exp: %empty;
])
AT_BISON_CHECK([input.y], 1, [],
[[input.y:2.8-10: error: named %union is invalid in C++
]])
AT_CLEANUP
])