%{
/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
/*

This file must be translated to C and modified to build everywhere.

Run bison like this:

  bison --yacc --name-prefix=cmCommandArgument_yy --defines=cmCommandArgumentParserTokens.h -ocmCommandArgumentParser.cxx cmCommandArgumentParser.y

Modify cmCommandArgumentParser.cxx:
  - "#if 0" out yyerrorlab block in range ["goto yyerrlab1", "yyerrlab1:"]

*/

#include "cmConfigure.h" // IWYU pragma: keep

#include <string.h>

#define yyGetParser (cmCommandArgument_yyget_extra(yyscanner))

/* Make sure malloc and free are available on QNX.  */
#ifdef __QNX__
# include <malloc.h>
#endif

/* Make sure the parser uses standard memory allocation.  The default
   generated parser malloc/free declarations do not work on all
   platforms.  */
#include <stdlib.h>
#define YYMALLOC malloc
#define YYFREE free

/*-------------------------------------------------------------------------*/
#include "cmCommandArgumentParserHelper.h" /* Interface to parser object.  */
#include "cmCommandArgumentLexer.h"  /* Interface to lexer object.  */
#include "cmCommandArgumentParserTokens.h" /* Need YYSTYPE for YY_DECL.  */

/* Forward declare the lexer entry point.  */
YY_DECL;

/* Helper function to forward error callback from parser.  */
static void cmCommandArgument_yyerror(yyscan_t yyscanner, const char* message);

/* Configure the parser to support large input.  */
#define YYMAXDEPTH 100000
#define YYINITDEPTH 10000

/* Disable some warnings in the generated code.  */
#ifdef _MSC_VER
# pragma warning (disable: 4102) /* Unused goto label.  */
# pragma warning (disable: 4065) /* Switch statement contains default but no
                                    case. */
# pragma warning (disable: 4244) /* loss of precision */
# pragma warning (disable: 4702) /* unreachable code */
#endif
%}

/* Generate a reentrant parser object.  */
%define api.pure

/* Configure the parser to use a lexer object.  */
%lex-param   {yyscan_t yyscanner}
%parse-param {yyscan_t yyscanner}

%define parse.error verbose

/*
%union {
  char* string;
}
*/

/*-------------------------------------------------------------------------*/
/* Tokens */
%token cal_ENVCURLY
%token cal_NCURLY
%token cal_DCURLY
%token cal_DOLLAR "$"
%token cal_LCURLY "{"
%token cal_RCURLY "}"
%token cal_NAME
%token cal_BSLASH "\\"
%token cal_SYMBOL
%token cal_AT     "@"
%token cal_ERROR
%token cal_ATNAME

/*-------------------------------------------------------------------------*/
/* grammar */
%%


Start:
  GoalWithOptionalBackSlash {
    $<str>$ = 0;
    yyGetParser->SetResult($<str>1);
  }

GoalWithOptionalBackSlash:
  Goal {
    $<str>$ = $<str>1;
  }
| Goal cal_BSLASH {
    $<str>$ = yyGetParser->CombineUnions($<str>1, $<str>2);
  }

Goal:
  {
    $<str>$ = 0;
  }
| String Goal {
    $<str>$ = yyGetParser->CombineUnions($<str>1, $<str>2);
  }

String:
  OuterText {
    $<str>$ = $<str>1;
  }
| Variable {
    $<str>$ = $<str>1;
  }

OuterText:
  cal_NAME {
    $<str>$ = $<str>1;
  }
| cal_AT {
    $<str>$ = $<str>1;
  }
| cal_DOLLAR {
    $<str>$ = $<str>1;
  }
| cal_LCURLY {
    $<str>$ = $<str>1;
  }
| cal_RCURLY {
    $<str>$ = $<str>1;
  }
| cal_SYMBOL {
    $<str>$ = $<str>1;
  }

Variable:
  cal_ENVCURLY EnvVarName cal_RCURLY {
    $<str>$ = yyGetParser->ExpandSpecialVariable($<str>1, $<str>2);
  }
| cal_NCURLY MultipleIds cal_RCURLY {
    $<str>$ = yyGetParser->ExpandSpecialVariable($<str>1, $<str>2);
  }
| cal_DCURLY MultipleIds cal_RCURLY {
    $<str>$ = yyGetParser->ExpandVariable($<str>2);
  }
| cal_ATNAME {
    $<str>$ = yyGetParser->ExpandVariableForAt($<str>1);
  }

EnvVarName:
  MultipleIds {
    $<str>$ = $<str>1;
  }
| cal_SYMBOL EnvVarName {
    $<str>$ = $<str>1;
  }

MultipleIds:
  {
    $<str>$ = 0;
  }
| ID MultipleIds {
    $<str>$ = yyGetParser->CombineUnions($<str>1, $<str>2);
  }

ID:
  cal_NAME {
    $<str>$ = $<str>1;
  }
| Variable {
    $<str>$ = $<str>1;
  }
;

%%
/* End of grammar */

/*--------------------------------------------------------------------------*/
void cmCommandArgument_yyerror(yyscan_t yyscanner, const char* message)
{
  yyGetParser->Error(message);
}
