/*
** 2000-05-29
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** Driver template for the LEMON parser generator.
**
** Synced with upstream:
** https://www.sqlite.org/src/artifact/468a155e8729cfbccfe1d85bf60d064f1dab76167a51149ec5c7928a2de63953
**
** The "lemon" program processes an LALR(1) input grammar file, then uses
** this template to construct a parser.  The "lemon" program inserts text
** at each "%%" line.  Also, any "P-a-r-s-e" identifier prefix (without the
** interstitial "-" characters) contained in this template is changed into
** the value of the %name directive from the grammar.  Otherwise, the content
** of this template is copied straight through into the generate parser
** source file.
**
** The following is the concatenation of all %include directives from the
** input grammar file:
*/
/************ Begin %include sections from the grammar ************************/
%%
/**************** End of %include directives **********************************/
/* These constants specify the various numeric values for terminal symbols
** in a format understandable to "makeheaders".  This section is blank unless
** "lemon" is run with the "-m" command-line option.
***************** Begin makeheaders token definitions *************************/
%%
/**************** End makeheaders token definitions ***************************/

/* The next section is a series of control #defines.
** various aspects of the generated parser.
**    YYCODETYPE         is the data type used to store the integer codes
**                       that represent terminal and non-terminal symbols.
**                       "unsigned char" is used if there are fewer than
**                       256 symbols.  Larger types otherwise.
**    YYNOCODE           is a number of type YYCODETYPE that is not used for
**                       any terminal or nonterminal symbol.
**    YYFALLBACK         If defined, this indicates that one or more tokens
**                       (also known as: "terminal symbols") have fall-back
**                       values which should be used if the original symbol
**                       would not parse.  This permits keywords to sometimes
**                       be used as identifiers, for example.
**    YYACTIONTYPE       is the data type used for "action codes" - numbers
**                       that indicate what to do in response to the next
**                       token.
**    ParseTOKENTYPE     is the data type used for minor type for terminal
**                       symbols.  Background: A "minor type" is a semantic
**                       value associated with a terminal or non-terminal
**                       symbols.  For example, for an "ID" terminal symbol,
**                       the minor type might be the name of the identifier.
**                       Each non-terminal can have a different minor type.
**                       Terminal symbols all have the same minor type, though.
**                       This macros defines the minor type for terminal 
**                       symbols.
**    YYMINORTYPE        is the data type used for all minor types.
**                       This is typically a union of many types, one of
**                       which is ParseTOKENTYPE.  The entry in the union
**                       for terminal symbols is called "yy0".
**    YYSTACKDEPTH       is the maximum depth of the parser's stack.  If
**                       zero the stack is dynamically sized using realloc()
**    ParseARG_SDECL     A static variable declaration for the %extra_argument
**    ParseARG_PDECL     A parameter declaration for the %extra_argument
**    ParseARG_STORE     Code to store %extra_argument into yypParser
**    ParseARG_FETCH     Code to extract %extra_argument from yypParser
**    YYERRORSYMBOL      is the code number of the error symbol.  If not
**                       defined, then do no error processing.
**    YYNSTATE           the combined number of states.
**    YYNRULE            the number of rules in the grammar
**    YYNTOKEN           Number of terminal symbols
**    YY_MAX_SHIFT       Maximum value for shift actions
**    YY_MIN_SHIFTREDUCE Minimum value for shift-reduce actions
**    YY_MAX_SHIFTREDUCE Maximum value for shift-reduce actions
**    YY_ERROR_ACTION    The yy_action[] code for syntax error
**    YY_ACCEPT_ACTION   The yy_action[] code for accept
**    YY_NO_ACTION       The yy_action[] code for no-op
**    YY_MIN_REDUCE      Minimum value for reduce actions
**    YY_MAX_REDUCE      Maximum value for reduce actions
*/
#ifndef INTERFACE
# define INTERFACE 1
#endif
/************* Begin control #defines *****************************************/
%%
/************* End control #defines *******************************************/

/* Define the yytestcase() macro to be a no-op if is not already defined
** otherwise.
**
** Applications can choose to define yytestcase() in the %include section
** to a macro that can assist in verifying code coverage.  For production
** code the yytestcase() macro should be turned off.  But it is useful
** for testing.
*/
#ifndef yytestcase
# define yytestcase(X)
#endif


/* Next are the tables used to determine what action to take based on the
** current state and lookahead token.  These tables are used to implement
** functions that take a state number and lookahead value and return an
** action integer.  
**
** Suppose the action integer is N.  Then the action is determined as
** follows
**
**   0 <= N <= YY_MAX_SHIFT             Shift N.  That is, push the lookahead
**                                      token onto the stack and goto state N.
**
**   N between YY_MIN_SHIFTREDUCE       Shift to an arbitrary state then
**     and YY_MAX_SHIFTREDUCE           reduce by rule N-YY_MIN_SHIFTREDUCE.
**
**   N == YY_ERROR_ACTION               A syntax error has occurred.
**
**   N == YY_ACCEPT_ACTION              The parser accepts its input.
**
**   N == YY_NO_ACTION                  No such action.  Denotes unused
**                                      slots in the yy_action[] table.
**
**   N between YY_MIN_REDUCE            Reduce by rule N-YY_MIN_REDUCE
**     and YY_MAX_REDUCE
**
** The action table is constructed as a single large table named yy_action[].
** Given state S and lookahead X, the action is computed as either:
**
**    (A)   N = yy_action[ yy_shift_ofst[S] + X ]
**    (B)   N = yy_default[S]
**
** The (A) formula is preferred.  The B formula is used instead if
** yy_lookahead[yy_shift_ofst[S]+X] is not equal to X.
**
** The formulas above are for computing the action when the lookahead is
** a terminal symbol.  If the lookahead is a non-terminal (as occurs after
** a reduce action) then the yy_reduce_ofst[] array is used in place of
** the yy_shift_ofst[] array.
**
** The following are the tables generated in this section:
**
**  yy_action[]        A single table containing all actions.
**  yy_lookahead[]     A table containing the lookahead for each entry in
**                     yy_action.  Used to detect hash collisions.
**  yy_shift_ofst[]    For each state, the offset into yy_action for
**                     shifting terminals.
**  yy_reduce_ofst[]   For each state, the offset into yy_action for
**                     shifting non-terminals after a reduce.
**  yy_default[]       Default action for each state.
**
*********** Begin parsing tables **********************************************/
%%
/********** End of lemon-generated parsing tables *****************************/

/* The next table maps tokens (terminal symbols) into fallback tokens.  
** If a construct like the following:
** 
**      %fallback ID X Y Z.
**
** appears in the grammar, then ID becomes a fallback token for X, Y,
** and Z.  Whenever one of the tokens X, Y, or Z is input to the parser
** but it does not parse, the type of the token is changed to ID and
** the parse is retried before an error is thrown.
**
** This feature can be used, for example, to cause some keywords in a language
** to revert to identifiers if they keyword does not apply in the context where
** it appears.
*/
#ifdef YYFALLBACK
static const YYCODETYPE yyFallback[] = {
%%
};
#endif /* YYFALLBACK */

/* The following structure represents a single element of the
** parser's stack.  Information stored includes:
**
**   +  The state number for the parser at this level of the stack.
**
**   +  The value of the token stored at this level of the stack.
**      (In other words, the "major" token.)
**
**   +  The semantic value stored at this level of the stack.  This is
**      the information used by the action routines in the grammar.
**      It is sometimes called the "minor" token.
**
** After the "shift" half of a SHIFTREDUCE action, the stateno field
** actually contains the reduce action for the second half of the
** SHIFTREDUCE.
*/
struct yyStackEntry {
  yyStackEntry() {
    stateno = 0;
    major = 0;
  }
  yyStackEntry(YYACTIONTYPE stateno_, YYCODETYPE major_, ParseTOKENTYPE minor_) {
    stateno = stateno_;
    major = major_;
    minor.yy0 = minor_;
  }
  YYACTIONTYPE stateno;  /* The state-number, or reduce action in SHIFTREDUCE */
  YYCODETYPE major;      /* The major token value.  This is the code
                         ** number for the token at this stack level */
  YYMINORTYPE minor;     /* The user-supplied minor token value.  This
                         ** is the value of the token  */
};

static void ParseInit(yyParser *pParser);
static void ParseFinalize(yyParser *pParser);

/* The state of the parser is completely contained in an instance of
** the following structure */
struct yyParser {
#ifdef YYTRACKMAXSTACKDEPTH
  int yyhwm;                    /* High-water mark of the stack */
#endif
#ifndef YYNOERRORRECOVERY
  int yyerrcnt;                 /* Shifts left before out of the error */
#endif
  ParseARG_SDECL                /* A place to hold %extra_argument */
  vector<yyStackEntry> yystack; /* The parser's stack */
  yyParser() {
    ParseInit(this);
  }
  ~yyParser() {
    ParseFinalize(this);
  }
};
typedef struct yyParser yyParser;

#include "omassert.h"
#include "debuglog.h"

#if defined(YYCOVERAGE) || defined(XAPIAN_DEBUG_LOG)
/* For tracing shifts, the names of all terminals and nonterminals
** are required.  The following table supplies these names */
static const char *const yyTokenName[] = { 
%%
};

/* For tracing reduce actions, the names of all rules are required.
*/
static const char *const yyRuleName[] = {
%%
};

/*
** This function returns the symbolic name associated with a token
** value.
*/
static const char *ParseTokenName(int tokenType){
  if( tokenType>=0 && tokenType<(int)(sizeof(yyTokenName)/sizeof(yyTokenName[0])) ){
    return yyTokenName[tokenType];
  }
  return "Unknown";
}

/*
** This function returns the symbolic name associated with a rule
** value.
*/
static const char *ParseRuleName(int ruleNum){
  if( ruleNum>=0 && ruleNum<(int)(sizeof(yyRuleName)/sizeof(yyRuleName[0])) ){
    return yyRuleName[ruleNum];
  }
  return "Unknown";
}
#endif /* defined(YYCOVERAGE) || defined(XAPIAN_DEBUG_LOG) */

/* Datatype of the argument to the memory allocated passed as the
** second argument to ParseAlloc() below.  This can be changed by
** putting an appropriate #define in the %include section of the input
** grammar.
*/
#ifndef YYMALLOCARGTYPE
# define YYMALLOCARGTYPE size_t
#endif

/* Initialize a new parser that has already been allocated.
*/
static
void ParseInit(yyParser *pParser){
#ifdef YYTRACKMAXSTACKDEPTH
  pParser->yyhwm = 0;
#endif
#if 0
#if YYSTACKDEPTH<=0
  pParser->yytos = NULL;
  pParser->yystack = NULL;
  pParser->yystksz = 0;
  if( yyGrowStack(pParser) ){
    pParser->yystack = &pParser->yystk0;
    pParser->yystksz = 1;
  }
#endif
#endif
#ifndef YYNOERRORRECOVERY
  pParser->yyerrcnt = -1;
#endif
#if 0
  pParser->yytos = pParser->yystack;
  pParser->yystack[0].stateno = 0;
  pParser->yystack[0].major = 0;
#if YYSTACKDEPTH>0
  pParser->yystackEnd = &pParser->yystack[YYSTACKDEPTH-1];
#endif
#else
  pParser->yystack.push_back(yyStackEntry());
#endif
}

#ifndef Parse_ENGINEALWAYSONSTACK
/* 
** This function allocates a new parser.
**
** Inputs:
** None.
**
** Outputs:
** A pointer to a parser.  This pointer is used in subsequent calls
** to Parse and ParseFree.
*/
static yyParser *ParseAlloc(void){
  return new yyParser;
}
#endif /* Parse_ENGINEALWAYSONSTACK */


/* The following function deletes the "minor type" or semantic value
** associated with a symbol.  The symbol can be either a terminal
** or nonterminal. "yymajor" is the symbol code, and "yypminor" is
** a pointer to the value to be deleted.  The code used to do the 
** deletions is derived from the %destructor and/or %token_destructor
** directives of the input grammar.
*/
static void yy_destructor(
  yyParser *yypParser,    /* The parser */
  YYCODETYPE yymajor,     /* Type code for object to destroy */
  YYMINORTYPE *yypminor   /* The object to be destroyed */
){
  ParseARG_FETCH;
  switch( yymajor ){
    /* Here is inserted the actions which take place when a
    ** terminal or non-terminal is destroyed.  This can happen
    ** when the symbol is popped from the stack during a
    ** reduce or during error processing or when a parser is 
    ** being destroyed before it is finished parsing.
    **
    ** Note: during a reduce, the only symbols destroyed are those
    ** which appear on the RHS of the rule, but which are *not* used
    ** inside the C code.
    */
/********* Begin destructor definitions ***************************************/
%%
/********* End destructor definitions *****************************************/
    default:  break;   /* If no destructor action specified: do nothing */
  }
  ParseARG_STORE; /* Suppress warning about unused %extra_argument variable */
}

/*
** Pop the parser's stack once.
**
** If there is a destructor routine associated with the token which
** is popped from the stack, then call it.
*/
static void yy_pop_parser_stack(yyParser *pParser){
  Assert( pParser->yystack.size() > 1 );
  yyStackEntry *yytos = &pParser->yystack.back();

  LOGLINE(QUERYPARSER, "Popping " << ParseTokenName(yytos->major));
  yy_destructor(pParser, yytos->major, &yytos->minor);
  pParser->yystack.pop_back();
}

/*
** Clear all secondary memory allocations from the parser
*/
static
void ParseFinalize(yyParser *pParser){
  while( pParser->yystack.size() > 1 ) yy_pop_parser_stack(pParser);
}

#ifndef Parse_ENGINEALWAYSONSTACK
/* 
** Deallocate and destroy a parser.  Destructors are called for
** all stack elements before shutting the parser down.
**
** If the YYPARSEFREENEVERNULL macro exists (for example because it
** is defined in a %include section of the input grammar) then it is
** assumed that the input pointer is never NULL.
*/
static
void ParseFree(
  yyParser *pParser           /* The parser to be deleted */
){
  delete pParser;
}
#endif /* Parse_ENGINEALWAYSONSTACK */

/*
** Return the peak depth of the stack for a parser.
*/
#ifdef YYTRACKMAXSTACKDEPTH
int ParseStackPeak(yyParser *pParser){
  return pParser->yyhwm;
}
#endif

/* This array of booleans keeps track of the parser statement
** coverage.  The element yycoverage[X][Y] is set when the parser
** is in state X and has a lookahead token Y.  In a well-tested
** systems, every element of this matrix should end up being set.
*/
#if defined(YYCOVERAGE)
static unsigned char yycoverage[YYNSTATE][YYNTOKEN];
#endif

/*
** Write into out a description of every state/lookahead combination that
**
**   (1)  has not been used by the parser, and
**   (2)  is not a syntax error.
**
** Return the number of missed state/lookahead combinations.
*/
#if defined(YYCOVERAGE)
int ParseCoverage(FILE *out){
  int stateno, iLookAhead, i;
  int nMissed = 0;
  for(stateno=0; stateno<YYNSTATE; stateno++){
    i = yy_shift_ofst[stateno];
    for(iLookAhead=0; iLookAhead<YYNTOKEN; iLookAhead++){
      if( yy_lookahead[i+iLookAhead]!=iLookAhead ) continue;
      if( yycoverage[stateno][iLookAhead]==0 ) nMissed++;
      if( out ){
        fprintf(out,"State %d lookahead %s %s\n", stateno,
                yyTokenName[iLookAhead],
                yycoverage[stateno][iLookAhead] ? "ok" : "missed");
      }
    }
  }
  return nMissed;
}
#endif

/*
** Find the appropriate action for a parser given the terminal
** look-ahead token iLookAhead.
*/
static unsigned int yy_find_shift_action(
  yyParser *pParser,        /* The parser */
  YYCODETYPE iLookAhead     /* The look-ahead token */
){
  int i;
  int stateno = pParser->yystack.back().stateno;
 
  if( stateno>YY_MAX_SHIFT ) return stateno;
  Assert( stateno <= YY_SHIFT_COUNT );
#if defined(YYCOVERAGE)
  yycoverage[stateno][iLookAhead] = 1;
#endif
  do{
    i = yy_shift_ofst[stateno];
    Assert( i>=0 );
    Assert( i+YYNTOKEN<=(int)(sizeof(yy_lookahead)/sizeof(yy_lookahead[0])) );
    Assert( iLookAhead!=YYNOCODE );
    Assert( iLookAhead < YYNTOKEN );
    i += iLookAhead;
    if( yy_lookahead[i]!=iLookAhead ){
#ifdef YYFALLBACK
      YYCODETYPE iFallback;            /* Fallback token */
      if( iLookAhead<sizeof(yyFallback)/sizeof(yyFallback[0])
             && (iFallback = yyFallback[iLookAhead])!=0 ){
        LOGLINE(QUERYPARSER,
                "FALLBACK " << ParseTokenName(iLookAhead) << " => " <<
                ParseTokenName(iFallback));
        Assert( yyFallback[iFallback]==0 ); /* Fallback loop must terminate */
        iLookAhead = iFallback;
        continue;
      }
#endif
#ifdef YYWILDCARD
      {
        int j = i - iLookAhead + YYWILDCARD;
        if( 
#if YY_SHIFT_MIN+YYWILDCARD<0
          j>=0 &&
#endif
#if YY_SHIFT_MAX+YYWILDCARD>=YY_ACTTAB_COUNT
          j<YY_ACTTAB_COUNT &&
#endif
          yy_lookahead[j]==YYWILDCARD && iLookAhead>0
        ){
          LOGLINE(QUERYPARSER,
                  "WILDCARD " << ParseTokenName(iLookAhead) << " => " <<
                  ParseTokenName(YYWILDCARD));
          return yy_action[j];
        }
      }
#endif /* YYWILDCARD */
      return yy_default[stateno];
    }else{
      return yy_action[i];
    }
  }while(1);
}

/*
** Find the appropriate action for a parser given the non-terminal
** look-ahead token iLookAhead.
*/
static int yy_find_reduce_action(
  int stateno,              /* Current state number */
  YYCODETYPE iLookAhead     /* The look-ahead token */
){
  int i;
#ifdef YYERRORSYMBOL
  if( stateno>YY_REDUCE_COUNT ){
    return yy_default[stateno];
  }
#else
  Assert( stateno<=YY_REDUCE_COUNT );
#endif
  i = yy_reduce_ofst[stateno];
  Assert( iLookAhead!=YYNOCODE );
  i += iLookAhead;
#ifdef YYERRORSYMBOL
  if( i<0 || i>=YY_ACTTAB_COUNT || yy_lookahead[i]!=iLookAhead ){
    return yy_default[stateno];
  }
#else
  Assert( i>=0 && i<YY_ACTTAB_COUNT );
  Assert( yy_lookahead[i]==iLookAhead );
#endif
  return yy_action[i];
}

/*
** The following routine is called if the stack overflows.
** In Xapian this can never happen as we use std::vector to provide a stack
** of indefinite size.
*/
#if 0
static void yyStackOverflow(yyParser *yypParser){
   ParseARG_FETCH;
   yypParser->yyidx--;
#ifndef NDEBUG
   if( yyTraceFILE ){
     fprintf(yyTraceFILE,"%sStack Overflow!\n",yyTracePrompt);
   }
#endif
   while( yypParser->yytos>yypParser->yystack ) yy_pop_parser_stack(yypParser);
   /* Here code is inserted which will execute if the parser
   ** stack ever overflows */
/******** Begin %stack_overflow code ******************************************/
%%
/******** End %stack_overflow code ********************************************/
   ParseARG_STORE; /* Suppress warning about unused %extra_argument var */
}
#endif

/*
** Print tracing information for a SHIFT action
*/
#ifdef XAPIAN_DEBUG_LOG
static void yyTraceShift(yyParser *yypParser, int yyNewState, const char *zTag){
  if( yyNewState<YYNSTATE ){
    LOGLINE(QUERYPARSER, zTag << " '" <<
                         yyTokenName[yypParser->yystack.back().major] <<
                         "', go to state " << yyNewState);
  }else{
    LOGLINE(QUERYPARSER, zTag << " '" <<
                         yyTokenName[yypParser->yystack.back().major] <<
                         "', pending reduce " << yyNewState - YY_MIN_REDUCE);
  }
}
#else
# define yyTraceShift(X,Y,Z)
#endif

/*
** Perform a shift action.
*/
static void yy_shift(
  yyParser *yypParser,          /* The parser to be shifted */
  int yyNewState,               /* The new state to shift in */
  int yyMajor,                  /* The major token to shift in */
  ParseTOKENTYPE yyMinor        /* The minor token to shift in */
){
  if( yyNewState > YY_MAX_SHIFT ){
    yyNewState += YY_MIN_REDUCE - YY_MIN_SHIFTREDUCE;
  }
  yypParser->yystack.push_back(yyStackEntry(yyNewState, yyMajor, yyMinor));
#ifdef YYTRACKMAXSTACKDEPTH
  if( (int)(yypParser->yystack.size()>yypParser->yyhwm ){
    yypParser->yyhwm++;
    Assert( yypParser->yyhwm == (int)(yypParser->yystack.size() );
  }
#endif
  yyTraceShift(yypParser, yyNewState, "Shift");
}

/* The following table contains information about every rule that
** is used during the reduce.
*/
static const struct {
  YYCODETYPE lhs;       /* Symbol on the left-hand side of the rule */
  signed char nrhs;     /* Negative of the number of RHS symbols in the rule */
} yyRuleInfo[] = {
%%
};

static void yy_accept(yyParser*);  /* Forward Declaration */

/*
** Perform a reduce action and the shift that must immediately
** follow the reduce.
**
** The yyLookahead and yyLookaheadToken parameters provide reduce actions
** access to the lookahead token (if any).  The yyLookahead will be YYNOCODE
** if the lookahead token has already been consumed.  As this procedure is
** only called from one place, optimizing compilers will in-line it, which
** means that the extra parameters have no performance impact.
*/
static void yy_reduce(
  yyParser *yypParser,         /* The parser */
  unsigned int yyruleno,       /* Number of the rule by which to reduce */
  int yyLookahead,             /* Lookahead token, or YYNOCODE if none */
  ParseTOKENTYPE yyLookaheadToken  /* Value of the lookahead token */
){
  int yygoto;                     /* The next state */
  int yyact;                      /* The next action */
  yyStackEntry *yymsp;            /* The top of the parser's stack */
  int yysize;                     /* Amount to pop the stack */
  ParseARG_FETCH;
  (void)yyLookahead;
  (void)yyLookaheadToken;
  yymsp = &yypParser->yystack.back();
#ifdef XAPIAN_DEBUG_LOG
  if( yyruleno<(int)(sizeof(yyRuleName)/sizeof(yyRuleName[0])) ){
    yysize = yyRuleInfo[yyruleno].nrhs;
    if( yysize ){
      LOGLINE(QUERYPARSER, "Reduce " << yyruleno << " [" <<
                           ParseRuleName(yyruleno) << "], go to state " <<
                           yymsp[yysize].stateno);
    } else {
      LOGLINE(QUERYPARSER, "Reduce " << yyruleno << " [" <<
                           ParseRuleName(yyruleno) << "].");
    }
  }
#endif /* XAPIAN_DEBUG_LOG */
  /*  yygotominor = yyzerominor; */

  /* Check that the stack is large enough to grow by a single entry
  ** if the RHS of the rule is empty.  This ensures that there is room
  ** enough on the stack to push the LHS value without invalidating
  ** pointers into the stack. */
  if( yyRuleInfo[yyruleno].nrhs==0 ){
#if 1
    yypParser->yystack.resize(yypParser->yystack.size() + 1);
    yymsp = &(yypParser->yystack.back()) - 1;
#else
#ifdef YYTRACKMAXSTACKDEPTH
    if( (int)(yypParser->yytos - yypParser->yystack)>yypParser->yyhwm ){
      yypParser->yyhwm++;
      Assert( yypParser->yyhwm == (int)(yypParser->yytos - yypParser->yystack));
    }
#endif
#if YYSTACKDEPTH>0 
    if( yypParser->yytos>=yypParser->yystackEnd ){
      yyStackOverflow(yypParser);
      return;
    }
#else
    if( yypParser->yytos>=&yypParser->yystack[yypParser->yystksz-1] ){
      if( yyGrowStack(yypParser) ){
        yyStackOverflow(yypParser);
        return;
      }
      yymsp = yypParser->yytos;
    }
#endif
#endif
  }

  switch( yyruleno ){
  /* Beginning here are the reduction cases.  A typical example
  ** follows:
  **   case 0:
  **  #line <lineno> <grammarfile>
  **     { ... }           // User supplied code
  **  #line <lineno> <thisfile>
  **     break;
  */
/********** Begin reduce actions **********************************************/
%%
/********** End reduce actions ************************************************/
  }
  Assert( yyruleno<sizeof(yyRuleInfo)/sizeof(yyRuleInfo[0]) );
  yygoto = yyRuleInfo[yyruleno].lhs;
  yysize = yyRuleInfo[yyruleno].nrhs;
  yyact = yy_find_reduce_action(yymsp[yysize].stateno,static_cast<YYCODETYPE>(yygoto));

  /* There are no SHIFTREDUCE actions on nonterminals because the table
  ** generator has simplified them to pure REDUCE actions. */
  Assert( !(yyact>YY_MAX_SHIFT && yyact<=YY_MAX_SHIFTREDUCE) );

  /* It is not possible for a REDUCE to be followed by an error */
  Assert( yyact!=YY_ERROR_ACTION );

  yymsp += yysize+1;
  if (yysize) {
    yypParser->yystack.resize(yypParser->yystack.size() + yysize+1);
  }
  yymsp->stateno = static_cast<YYACTIONTYPE>(yyact);
  yymsp->major = static_cast<YYCODETYPE>(yygoto);
  yyTraceShift(yypParser, yyact, "... then shift");
}

/*
** The following code executes when the parse fails
*/
#ifndef YYNOERRORRECOVERY
static void yy_parse_failed(
  yyParser *yypParser           /* The parser */
){
  ParseARG_FETCH;
  LOGLINE(QUERYPARSER, "Fail!");
  while( yypParser->yystack.size() > 1 ) yy_pop_parser_stack(yypParser);
  /* Here code is inserted which will be executed whenever the
  ** parser fails */
/************ Begin %parse_failure code ***************************************/
%%
/************ End %parse_failure code *****************************************/
  ParseARG_STORE; /* Suppress warning about unused %extra_argument variable */
}
#endif /* YYNOERRORRECOVERY */

/*
** The following code executes when a syntax error first occurs.
*/
static void yy_syntax_error(
  yyParser *yypParser,           /* The parser */
  int yymajor,                   /* The major type of the error token */
  ParseTOKENTYPE yyminor         /* The minor type of the error token */
){
  ParseARG_FETCH;
  (void)yymajor;
  (void)yyminor;
#define TOKEN yyminor
/************ Begin %syntax_error code ****************************************/
%%
/************ End %syntax_error code ******************************************/
  ParseARG_STORE; /* Suppress warning about unused %extra_argument variable */
}

/*
** The following is executed when the parser accepts
*/
static void yy_accept(
  yyParser *yypParser           /* The parser */
){
  ParseARG_FETCH;
  LOGLINE(QUERYPARSER, "Accept!");
#ifndef YYNOERRORRECOVERY
  yypParser->yyerrcnt = -1;
#endif
  AssertEq( yypParser->yystack.size(), 1 );
  /* Here code is inserted which will be executed whenever the
  ** parser accepts */
/*********** Begin %parse_accept code *****************************************/
%%
/*********** End %parse_accept code *******************************************/
  ParseARG_STORE; /* Suppress warning about unused %extra_argument variable */
}

/* The main parser program.
** The first argument is a pointer to a structure obtained from
** "ParseAlloc" which describes the current state of the parser.
** The second argument is the major token number.  The third is
** the minor token.  The fourth optional argument is whatever the
** user wants (and specified in the grammar) and is available for
** use by the action routines.
**
** Inputs:
** <ul>
** <li> A pointer to the parser (an opaque structure.)
** <li> The major token number.
** <li> The minor token number.
** <li> An option argument of a grammar-specified type.
** </ul>
**
** Outputs:
** None.
*/
static
void Parse(
  yyParser *yypParser,         /* The parser */
  int yymajor,                 /* The major token code number */
  ParseTOKENTYPE yyminor       /* The value for the token */
  ParseARG_PDECL               /* Optional %extra_argument parameter */
){
  YYMINORTYPE yyminorunion;
  unsigned int yyact;   /* The parser action. */
#if !defined(YYERRORSYMBOL) && !defined(YYNOERRORRECOVERY)
  int yyendofinput;     /* True if we are at the end of input */
#endif
#ifdef YYERRORSYMBOL
  int yyerrorhit = 0;   /* True if yymajor has invoked an error */
#endif

#if !defined(YYERRORSYMBOL) && !defined(YYNOERRORRECOVERY)
  yyendofinput = (yymajor==0);
#endif
  ParseARG_STORE;

#ifdef XAPIAN_DEBUG_LOG
  {
    int stateno = yypParser->yystack.back().stateno;
    if( stateno < YY_MIN_REDUCE ){
      LOGLINE(QUERYPARSER, "Input '" << ParseTokenName(yymajor) <<
                           "'," << (yyminor ? yyminor->name : "<<null>>") <<
                           "in state " << stateno);
    }else{
      LOGLINE(QUERYPARSER, "Input '" << ParseTokenName(yymajor) <<
                           "'," << (yyminor ? yyminor->name : "<<null>>") <<
                           "with pending reduce " << stateno-YY_MIN_REDUCE);
    }
  }
#endif

  do{
    yyact = yy_find_shift_action(yypParser,static_cast<YYCODETYPE>(yymajor));
    if( yyact >= YY_MIN_REDUCE ){
      yy_reduce(yypParser,yyact-YY_MIN_REDUCE,yymajor,yyminor);
    }else if( yyact <= YY_MAX_SHIFTREDUCE ){
      yy_shift(yypParser,yyact,yymajor,yyminor);
#ifndef YYNOERRORRECOVERY
      yypParser->yyerrcnt--;
#endif
      yymajor = YYNOCODE;
    }else if( yyact==YY_ACCEPT_ACTION ){
      yypParser->yystack.pop_back();
      yy_accept(yypParser);
      return;
    }else{
      Assert( yyact == YY_ERROR_ACTION );
      yyminorunion.yy0 = yyminor;
#ifdef YYERRORSYMBOL
      int yymx;
#endif
      LOGLINE(QUERYPARSER, "Syntax Error!");
#ifdef YYERRORSYMBOL
      /* A syntax error has occurred.
      ** The response to an error depends upon whether or not the
      ** grammar defines an error token "ERROR".  
      **
      ** This is what we do if the grammar does define ERROR:
      **
      **  * Call the %syntax_error function.
      **
      **  * Begin popping the stack until we enter a state where
      **    it is legal to shift the error symbol, then shift
      **    the error symbol.
      **
      **  * Set the error count to three.
      **
      **  * Begin accepting and shifting new tokens.  No new error
      **    processing will occur until three tokens have been
      **    shifted successfully.
      **
      */
      if( yypParser->yyerrcnt<0 ){
        yy_syntax_error(yypParser,yymajor,yyminor);
      }
      yymx = yypParser->yystack.back().major;
      if( yymx==YYERRORSYMBOL || yyerrorhit ){
        LOGLINE(QUERYPARSER, "Discard input token " << ParseTokenName(yymajor));
        yy_destructor(yypParser, static_cast<YYCODETYPE>(yymajor), &yyminorunion);
        yymajor = YYNOCODE;
      }else{
        while( !yypParser->yystack.empty()
            && yymx != YYERRORSYMBOL
            && (yyact = yy_find_reduce_action(
                        yypParser->yystack.back().stateno,
                        YYERRORSYMBOL)) >= YY_MIN_REDUCE
        ){
          yy_pop_parser_stack(yypParser);
        }
        if( yypParser->yystack.empty() || yymajor==0 ){
          yy_destructor(yypParser,static_cast<YYCODETYPE>(yymajor),&yyminorunion);
          yy_parse_failed(yypParser);
#ifndef YYNOERRORRECOVERY
          yypParser->yyerrcnt = -1;
#endif
          yymajor = YYNOCODE;
        }else if( yymx!=YYERRORSYMBOL ){
          yy_shift(yypParser,yyact,YYERRORSYMBOL,yyminor);
        }
      }
      yypParser->yyerrcnt = 3;
      yyerrorhit = 1;
#elif defined(YYNOERRORRECOVERY)
      /* If the YYNOERRORRECOVERY macro is defined, then do not attempt to
      ** do any kind of error recovery.  Instead, simply invoke the syntax
      ** error routine and continue going as if nothing had happened.
      **
      ** Applications can set this macro (for example inside %include) if
      ** they intend to abandon the parse upon the first syntax error seen.
      */
      yy_syntax_error(yypParser,yymajor, yyminor);
      yy_destructor(yypParser,static_cast<YYCODETYPE>(yymajor),&yyminorunion);
      yymajor = YYNOCODE;
      
#else  /* YYERRORSYMBOL is not defined */
      /* This is what we do if the grammar does not define ERROR:
      **
      **  * Report an error message, and throw away the input token.
      **
      **  * If the input token is $, then fail the parse.
      **
      ** As before, subsequent error messages are suppressed until
      ** three input tokens have been successfully shifted.
      */
      if( yypParser->yyerrcnt<=0 ){
        yy_syntax_error(yypParser,yymajor, yyminor);
      }
      yypParser->yyerrcnt = 3;
      yy_destructor(yypParser,static_cast<YYCODETYPE>(yymajor),&yyminorunion);
      if( yyendofinput ){
        yy_parse_failed(yypParser);
#ifndef YYNOERRORRECOVERY
        yypParser->yyerrcnt = -1;
#endif
      }
      yymajor = YYNOCODE;
#endif
    }
  }while( yymajor!=YYNOCODE && yypParser->yystack.size() > 1 );
#ifdef XAPIAN_DEBUG_LOG
  {
    int i;
    LOGLINE(QUERYPARSER, "Return. Stack=");
    for(i=1; i<=(int)yypParser->yystack.size(); i++)
      LOGLINE(QUERYPARSER, yyTokenName[yypParser->yystack[i].major]);
  }
#endif
  return;
}

// Select C++ syntax highlighting in vim editor: vim: syntax=cpp
