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PGActions.cpp
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#ifdef LRSTAR
#include "ComGlobal.h"
#include "PGGlobal.h"
#include "PGActions.h"
#include "PGParser.h"
#define WIDTH 80
static int head_sti;
static int nodename_sti;
static int n_declared;
static int endblock = 0;
static char* codeblockstart;
static int codeblockline;
static int prod_numb = 0;
#ifdef TOKEN_ACTIONS
char PGTokenAction::errormsg[256];
int PGTokenAction::head_column = 0;
int PGTokenAction::arrow_column = 0;
int PGTokenAction::arrow_length = 0;
/////////////////////////////////////////////////////////////////////////////////////////////////////
// //
int PGTokenAction::error (int t) // New version
{
if (token.end == token.start) token.end++;
return (t); // t = 0, usually (passed as argument)
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
// //
int PGTokenAction::eof (int t) // New version
{
if (codeblock)
{
prt_error ("Code block starts here with { or %%{ but has no matching end } or %%} before the end-of-file",
codeblockstart, 0, codeblockline);
PG::Terminate(0);
}
return (t); // t = 0, a = 0 usually (passed as argument)
}
///////////////////////////////////////////////////////////////////////////////
// //
// firstsym //
int PGTokenAction::firstsym (int t) // New version
{
int la, la_line;
if (codeblock) return 0; // Return <error>
if (line_pos == 1) // First symbol on this line?
{
if (goal_symbol == 0) // Goal not defined yet?
{
la = get_lookahead (la_line);
if (la == COLON || la == ARROW1)
{
goal_symbol = 1;
head_column = token.column;
return (GOALSYMBOL);
}
return t;
}
if (prev_token == SEMICOLON)
{
head_column = token.column;
return (HEADSYMBOL);
}
char *p;
int blankline = 0;
for (p = token.start; *p != '\n'; p--); // Find previous '\n'
if (p > input_start)
{
while (*--p == ' ' || *p == '\t'); // Bypass whitespace.
if (*p == '\n') blankline = 1; // Blank line?
}
la = get_lookahead (la_line);
if (la == COLON || la == ARROW1 || la == ARROW2 || la == ARROW3 || la == ARROW4)
{
if (la_line == token.line) // Arrow is on the same line?
{
if (token.column > arrow_column)
{
prt_error ("%s is too far right or 'tab' option is wrong", token.start, token.end, token.line);
PG::Terminate (0);
return (0);
}
head_column = token.column;
return (HEADSYMBOL);
}
else // '->' is on the next line!
{
if (token.column < arrow_column + arrow_length + 1) // If too far left?
{
if (blankline)
{
if (token.column <= head_column || token.column <= arrow_column) // Symbol looks like a head position?
{
head_column = token.column;
return (HEADSYMBOL);
}
}
if (token.column <= head_column) // Symbol looks like a head position?
{
head_column = token.column;
return (HEADSYMBOL);
}
prt_error ("%s has ambiguous position or 'tab' option is wrong. If tail: move right.\nIf head: move left, or preceed with ';', or follow with '->' on the same line",
token.start, token.end, token.line);
PG::Terminate (0);
return (0);
}
else // Tail symbol position!
{
if (blankline) // Preceeded by a blank line?
{
prt_error ("%s looks like a tail symbol continuing the previous rule, but is preceeded by a blank line",
token.start, token.end, token.line);
PG::Terminate (0);
return (0);
}
return t;
}
}
}
if (blankline) // Preceeded by a blank line?
{
prt_error ("%s looks like a tail symbol continuing the previous rule, but is preceeded by a blank line",
token.start, token.end, token.line);
PG::Terminate (0);
return (0);
}
if (token.column <= head_column)
{
prt_error ("%s looks like a tail symbol but is too far left or 'tab' option is wrong", token.start, token.end, token.line);
PG::Terminate (0);
return (0);
}
}
return t;
}
///////////////////////////////////////////////////////////////////////////////
// //
// arrow //
int PGTokenAction::arrow (int t) // New version
{
if (codeblock) return 0; // Return <error>
if (t == BAR) // '|' symbol
{
if (line_pos == 1)
{
arrow_length = 1;
arrow_column = token.column; // If parser did not do a lookahead, otherwise bug here.
}
return (t);
}
if (goal_symbol == 0)
{
prt_error ("Goal symbol is not defined yet", token.start, token.end, token.line);
PG::Terminate (0);
return 0;
}
arrow_length = strlen (term_symb[t]) - 2; // Subtract the single quotes.
arrow_column = token.column;
if (line_pos == 1)
{
return (t);
}
if (line_pos == 2)
{
if (prev_token == HEADSYMBOL || prev_token == GOALSYMBOL)
{
return (t);
}
}
prt_error ("'%s' must be the first symbol on a line or second (if preceeded by a head symbol)",
token.start, token.end, token.line);
PG::Terminate (0);
return 0;
}
#endif
#ifdef PARSE_ACTIONS
/////////////////////////////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::STI;
char PGParseAction::errormsg[256];
int PGParseAction::production_length;
/////////////////////////////////////////////////////////////////////////////////////////////////////
//
int PGParseAction::arrow_ (int prod)
{
int x = arg_numb [pact_arg[prod]] - 1; // Argument points at location x in parse stack.
PGTokenAction::arrow (-PS[x].sti); // sti = - terminal symbol number.
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::goalsymbol_ (int p) // LRSTAR goal symbol.
{
int sti;
goal_symbol = 1;
int x = arg_numb [pact_arg[p]] - 1;
sti = head_sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, TERMINAL|ARGUMENT|CONSTANT, PS[x].line);
if (symbol[sti].type & TERMINAL) // Already a terminal?
{
prt_error ("Symbol '%s' has already been defined as a terminal", PS[x].start, PS[x].end, PS[x].line);
}
else if (symbol[sti].type & CONSTANT) // Already a constant?
{
prt_error ("Symbol '%s' has already been defined as a constant", PS[x].start, PS[x].end, PS[x].line);
}
symbol[sti].type |= NONTERMINAL; // Make it a nonterminal.
symbol[sti].numb = N_heads;
symbol[sti].value = N_heads++; // Increment nonterminal counter.
return 0;
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
//
int PGParseAction::errordecl_ (int prod)
{
int x = arg_numb [pact_arg[prod]]; // <error>
char* start = term_symb[x];
char* end = term_symb[x] + strlen (term_symb[x]);
if (*start == '\'') { start++; end--; }
int sti = add_symbol (0, start, end, TERMINAL, 0);
symbol[sti].type = TERMINAL;
symbol[sti].numb = N_terms; // = 0 (should be zero)
symbol[sti].value = N_terms++; // Increment terminal counter.
return 0;
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
//
int PGParseAction::options_ (int prod)
{
char *p, *opt, c;
int OK, rc, x, sti;
rc = 0;
x = arg_numb [pact_arg[prod]] - 1;
if (x >= 0) // Options line found in grammar?
{
sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, OPTIONSYM, PS[x].line);
symbol[sti].type = OPTIONSYM;
symbol[sti].numb = 0;
p = symbol[sti].name;
// Find option ...
p++; // bypass "
Top: while (*p == ' ' || *p == '\t' || *p == ',') p++; // bypass spaces, tabs & commas.
opt = p;
while (*p != '\n' && *p != 26 && *p != '"' && *p != ',' && *p != ' ') p++;
c = *p;
*p = 0;
OK = SET_OPTN (opt, grmfid, PS[x].line);
*p++ = c;
if (!OK) rc = 1; // fatal error
if (c == ' ') goto Top;
if (c == ',') goto Top;
}
Done: if (rc > 0) return rc;
rc = CheckOptions();
if (rc == 0) return 1; // error
N_tails = 0;
N_prods = 0;
N_terms = 0;
N_heads = 0;
N_generated = 0;
N_nodes = 0;
N_tacts = 0;
N_pacts = 0;
N_nacts = 0;
N_args = 0;
N_ints = 0;
N_strings = 0;
n_declared = 0;
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::CheckOptions ()
{
if (optn[PG_QUIET]) optn[PG_VERBOSE] = 0;
if (optn[PG_REDUCEONLY]) optn[PG_CONFLICTS] = 1;
if (optn[PG_CONFLICTTRACE]) optn[PG_CONFLICTS] = 1;
if (optn[PG_ERRORCOUNT] == 0) optn[PG_ERRORCOUNT] = 1;
if (optn[PG_ERRORCOUNT] > 1000) optn[PG_ERRORCOUNT] = 1000;
if (optn[PG_TAB] < 2)
{
n_errors++;
printf ("%s(%04d) : Tab setting cannot be less than 2.\n", grmfid, 1);
return (0);
}
if (optn [PG_TAB] > 4)
{
n_errors++;
printf ("%s(%04d) : Tab setting cannot be greater than 4.\n", grmfid, 1);
return (0);
}
PGLexer::tab = optn[PG_TAB]; // Set tab value in lexer !!!
if (optn[PG_CLR_PARSER])
{
optn[PG_LR_PARSER] = 0;
optn[PG_LALR_PARSER] = 0;
optn[PG_SHIFTREDUCE] = 0;
optn[PG_DEFAULTRED] = 0;
optn[PG_BOOLMATRIX] = 1;
if (optn[PG_NONDETER])
{
n_errors++;
printf ("%s(%04d) : 'nd' option not available with 'clr' option.\n", grmfid, 1);
PG::Terminate(0);
}
}
else if (optn[PG_LALR_PARSER])
{
optn[PG_LR_PARSER] = 0;
}
max_errors = optn[PG_ERRORCOUNT];
option_grammar = optn[PG_GRAMMAR];
option_warnings = optn[PG_WARNINGS];
return (1);
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::constant_ (int p)
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, CONSTANT|ARGUMENT|TERMINAL, PS[x].line);
if (symbol[sti].numb >= 0) // Already defined?
{
if (symbol[sti].type & CONSTANT)
prt_error ("Constant symbol '%s' has already been defined", PS[x].start, PS[x].end, PS[x].line);
else if (symbol[sti].type & TERMINAL)
prt_error ("Symbol '%s' has already been defined as a terminal", PS[x].start, PS[x].end, PS[x].line);
}
else
{
symbol[sti].type |= CONSTANT;
symbol[sti].numb = n_constants++; // Increment terminal counter.
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::value_ (int p)
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, INTEGER, PS[x].line);
if (n_declared > 0)
{
prt_error ("Value '%s' must be assigned in the defined constants section above the declarations section",
PS[x].start, PS[x].end, PS[x].line);
}
if (symbol[sti].numb < 0)
{
symbol[sti].type = INTEGER;
symbol[sti].numb = N_ints++;
symbol[sti].value = atoi (symbol[sti].name); // define the value.
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::terminal_ (int p)
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, TERMINAL|ARGUMENT|CONSTANT, PS[x].line);
if (symbol[sti].numb >= 0) // Already a declared or defined?
{
if (symbol[sti].type & CONSTANT)
{
prt_error ("'%s' has been defined as a constant and cannot be assigned to a constant", PS[x].start, PS[x].end, PS[x].line);
}
else if (symbol[sti].numb == 0) // <error> symbol?
{
if (symbol[sti].line == 0) // First declaration of <error>?
{
// n_declared++; // Don't count <error> among the declared, it ruins list_rest_of_terminals().
symbol[sti].line = PS[x].line; // Give it the line number.
}
else goto Err;
}
else
{
Err: prt_error ("'%s' has already been declared", PS[x].start, PS[x].end, PS[x].line);
}
}
else
{
symbol[sti].type |= TERMINAL; // Arguments could come here, have to use |=.
symbol[sti].numb = N_terms;
symbol[sti].value = N_terms++; // Increment terminal counter.
n_declared++;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::terminalres_ (int p) // Newer version 20130518
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, TERMINAL|ARGUMENT|CONSTANT, PS[x].line);
if (symbol[sti].numb >= 0) // Already declared or defined?
{
if (symbol[sti].type & CONSTANT)
prt_error ("'%s' has been defined as a constant, cannot be defined as a reserved keyword", PS[x].start, PS[x].end, PS[x].line);
else
prt_error ("'%s' has already been declared", PS[x].start, PS[x].end, PS[x].line);
}
else
{
symbol[sti].type |= TERMINAL | RESERVED; // Arguments could come here, have to use |=.
symbol[sti].numb = N_terms;
symbol[sti].value = N_terms++; // Increment terminal counter.
n_declared++;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::oper_ (int p)
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, TERMINAL|ARGUMENT|CONSTANT, PS[x].line);
if (symbol[sti].numb < 0) // New terminal or old argument
{
symbol[sti].type |= TERMINAL|OPERATOR;
symbol[sti].numb = N_terms;
symbol[sti].value = N_terms++; // Increment terminal counter.
}
else if (symbol[sti].type & CONSTANT)
{
prt_error ("Constant symbol '%s' cannot used as an operator and given a precedence", PS[x].start, PS[x].end, PS[x].line);
}
else if (symbol[sti].type & OPERATOR)
{
prt_error ("Symbol '%s' has already been defined as an operator", PS[x].start, PS[x].end, PS[x].line);
}
else // ARGUMENT or TERMINAL.
{
symbol[sti].type |= TERMINAL|OPERATOR;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::headsymbol_ (int p)
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = head_sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, TERMINAL|TAIL|NONTERMINAL|ARGUMENT|CONSTANT, PS[x].line);
// printf ("-> headsymbol_ %s\n", symname(sti));
if (symbol[sti].type & NONTERMINAL) // Already a nonterminal?
{
prt_error ("Nonterminal symbol '%s' has already been defined", PS[x].start, PS[x].end, PS[x].line);
}
else if (symbol[sti].type & TERMINAL) // Already a terminal?
{
prt_error ("Symbol '%s' has already been defined as a terminal", PS[x].start, PS[x].end, PS[x].line);
}
else if (symbol[sti].type & CONSTANT) // Already a constant?
{
prt_error ("Symbol '%s' has already been defined as a constant", PS[x].start, PS[x].end, PS[x].line);
}
else
{
symbol[sti].type |= NONTERMINAL; // Make it a nonterminal.
symbol[sti].numb = N_heads;
symbol[sti].value = N_heads++; // Increment nonterminal counter.
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::tailkw_ (int p)
{
tail_(p);
keyword_sym = PS[arg_numb [pact_arg[p]]-1].sti;
symbol[keyword_sym].type |= NONTERMINAL;
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::prod_ (int p)
{
production_length = 0;
nodename_sti = 0;
return 0;
}
#ifdef YACC // For yacc grammars (not fully implemented yet).
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::init_code_start_ (int prod)
{
char* p = token.end;
codeblock = 1;
codeblockstart = p;
codeblockline = line_numb;
Scan: while (*p != 26 && *p != '\n') p++;
if (*p == '\n')
{
p++;
line_numb++;
if (*p == '%')
{
p++;
if (*p == '}')
{
p++;
token.end = p;
codeblock = 0;
return 0;
}
}
goto Scan;
}
if (*p == 26) // End of file?
{
token.end = p;
return 0;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::code_start_ (int prod)
{
int level = 1;
char* p = token.end;
codeblock = 1;
codeblockstart = p;
codeblockline = line_numb;
Scan: while (*p != '{' && *p != '}' && *p != '\n' && *p != 26 && *p != '/' && *p != '\'' && *p != '"') p++;
switch (*p)
{
case '{':
{
p++;
level++;
goto Scan;
}
case '}':
{
p++;
if (--level) goto Scan;
token.end = p;
codeblock = 0;
return 0;
}
case '\n':
{
p++;
line_numb++;
goto Scan;
}
case 26:
{
token.end = p;
return 0;
}
case '/':
{
p++;
if (*p == '/')
{
p++;
while (*p != '\n') p++;
p++;
line_numb++;
goto Scan;
}
if (*p == '*')
{
p++;
Scan2: while (*p != '\n' && *p != 26 && *p != '*') p++;
switch (*p)
{
case '\n':
{
p++;
line_numb++;
goto Scan2;
}
case 26:
{
token.end = p;
return 0;
}
case '*':
{
p++;
if (*p == '/')
{
p++;
goto Scan;
}
goto Scan2;
}
}
}
goto Scan;
}
case '\'':
{
p++;
Scan3: while (*p != '\n' && *p != 26 && *p != '\\' && *p != '\'') p++;
switch (*p)
{
case '\n':
{
token.end = p;
return 0;
}
case 26:
{
token.end = p;
return 0;
}
case '\\':
{
p += 2;
goto Scan3;
}
case '\'':
{
p++;
goto Scan;
}
}
}
case '"':
{
p++;
Scan4: while (*p != '\n' && *p != 26 && *p != '\\' && *p != '"') p++;
switch (*p)
{
case '\n':
{
token.end = p;
return 0;
}
case 26:
{
token.end = p;
return 0;
}
case '\\':
{
p += 2;
goto Scan4;
}
case '"':
{
p++;
goto Scan;
}
}
}
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::end_code_start_ (int prod)
{
char* p = token.end;
while (*p != 26) p++;
token.end = p;
return 0;
}
#endif
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::tailposition_ (int p)
{
production_length++;
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::prec_ (int p)
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = add_symbol (0, PS[x].start, PS[x].end, TERMINAL|NONTERMINAL|TAIL|CONSTANT|ARGUMENT, PS[x].line);
if (symbol[sti].type & NONTERMINAL) // NT symbol?
{
prt_error ("Nonterminal symbol '%s' cannot be used as a precedence symbol", PS[x].start, PS[x].end, PS[x].line);
}
symbol[sti].type |= TAIL;
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::tail_ (int p)
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, TERMINAL|NONTERMINAL|TAIL|CONSTANT|ARGUMENT, PS[x].line);
if (symbol[sti].numb == 0 && symbol[sti].type & NONTERMINAL) // Goal symbol?
{
prt_error ("Goal symbol '%s' cannot be used in grammar rules", PS[x].start, PS[x].end, PS[x].line);
}
else if (symbol[sti].type & CONSTANT)
{
prt_error ("Constant symbol '%s' cannot be used in grammar rules", PS[x].start, PS[x].end, PS[x].line);
}
symbol[sti].type |= TAIL;
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::sep_ (int p)
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, TERMINAL|NONTERMINAL|TAIL|ARGUMENT|CONSTANT, PS[x].line);
if (symbol[sti].numb == 0 && symbol[sti].type & NONTERMINAL) // Goal symbol?
{
prt_error ("Goal symbol '%s' cannot be used in grammar rules", PS[x].start, PS[x].end, PS[x].line);
}
else if (symbol[sti].type & CONSTANT) // Already a constant?
{
prt_error ("Symbol '%s' has been defined as a constant, cannot be used in grammar rules", PS[x].start, PS[x].end, PS[x].line);
}
symbol[sti].type |= TAIL;
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::token_action_spec_ (int p)
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, TACTION, PS[x].line);
if (symbol[sti].numb < 0)
{
symbol[sti].type = TACTION;
symbol[sti].numb = N_tacts++;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::parse_action_spec_ (int p)
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, PACTION, PS[x].line);
if (symbol[sti].numb < 0)
{
symbol[sti].type = PACTION;
symbol[sti].numb = N_pacts++;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::blank_parse_action_ (int p)
{
int x, sti;
x = arg_numb [pact_arg[p]] - 1;
sti = add_symbol (0, symbol[nodename_sti].name, symbol[nodename_sti].name + symbol[nodename_sti].length, PACTION, PS[x].line);
PS[x].sti = sti;
PS[x].start = symbol[sti].name;
PS[x].end = symbol[sti].name + symbol[sti].length;
if (symbol[sti].numb < 0)
{
symbol[sti].type = PACTION;
symbol[sti].numb = N_pacts++;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::parse_action_make_node_ (int p)
{
if (optn[PG_ASTCONST] == 0)
{
return 0;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::make_node_ (int p)
{
if (optn[PG_ASTCONST] == 0)
{
return -1; // Don't make node.
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::parse_action_make_node_wa_ (int p)
{
if (optn[PG_ASTCONST] == 0)
{
return 0;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::make_node_wa_ (int p)
{
if (optn[PG_ASTCONST] == 0)
{
if (nodename_sti == 0) return 0;
return -1; // Don't make node.
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::blank_node_action_ (int p)
{
if (optn[PG_ASTCONST] == 0) return -1; // Don't make node.
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::node_action_name_ (int p)
{
if (optn[PG_ASTCONST] == 0) return -1; // Don't make node.
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::node_name_ (int p) // +> or *> operator
{
if (optn[PG_ASTCONST] == 0)
{
nodename_sti = -1; // Ignore node name, ingnore args.
return -1; // Don't make a node for this node name.
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::pa_node_name_ (int p) // =+> or =*> operator
{
if (optn[PG_ASTCONST] == 0)
{
nodename_sti = 0; // Node name is not used anymore.
return 0; // Make a node for this node name.
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::parse_action_name_ (int p)
{
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::token_action_name_ (int p)
{
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::pa_node_spec_ (int p)
{
if (nodename_sti == -1)
{
return -1;
}
else
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = nodename_sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, NODENAME, PS[x].line);
if (symbol[sti].numb < 0)
{
symbol[sti].type = NODENAME;
symbol[sti].numb = N_nodes++;
}
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::node_spec_ (int p)
{
if (nodename_sti == -1)
{
return -1;
}
else
{
int x = arg_numb [pact_arg[p]] - 1;
int sti = nodename_sti = PS[x].sti = add_symbol (0, PS[x].start, PS[x].end, NODENAME, PS[x].line);
if (symbol[sti].numb < 0)
{
symbol[sti].type = NODENAME;
symbol[sti].numb = N_nodes++;
}
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// //
int PGParseAction::blank_node_name_ (int p)
{
if (optn[PG_ASTCONST] == 0)
{
nodename_sti = -1; // Disable this.
return -1; // Don't make node.
}
int sti = nodename_sti = add_symbol (0, symbol[head_sti].start, symbol[head_sti].start + symbol[head_sti].length, NODENAME, 0);
PS[0].sti = sti;
PS[0].start = symbol[sti].name;
PS[0].end = symbol[sti].name + symbol[sti].length;