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jscc
executable file
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jscc
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print = require("util").puts;
_print = function(str){console.log("__PRINT__\n"+str);};
_error = function(str){console.log("___ ERROR ___\n"+str);};
_warning = function(str){console.log("--- WARN ---\n"+str);};
alert = function(str){console.log("=== ALERT ===\n"+str);};
_quit = process.exit;
read_file = function(str){return require("fs").readFileSync(str).toString("utf-8");};
write_file = require("fs").writeFileSync;
process.on('uncaughtException', function (err) {
console.log("__ERROR__\n"+err.stack);
});
/* -HEADER----------------------------------------------------------------------
JS/CC: A LALR(1) Parser Generator written in JavaScript
Copyright (C) 2007, 2008 by J.M.K S.F. Software Technologies, Jan Max Meyer
http://www.jmksf.com ++ jscc<-AT->jmksf.com
File: global.js
Author: Jan Max Meyer
Usage: General variables, constants and defines
You may use, modify and distribute this software under the terms and conditions
of the Artistic License. Please see ARTISTIC for more information.
----------------------------------------------------------------------------- */
/*
Constants
*/
//Program version info
var JSCC_VERSION = "0.3.0";
//Symbol types
var SYM_NONTERM = 0;
var SYM_TERM = 1;
//Symbol special cases
var SPECIAL_NO_SPECIAL = 0;
var SPECIAL_EOF = 1;
var SPECIAL_WHITESPACE = 2;
//Symbol associativity
var ASSOC_NONE = 0;
var ASSOC_LEFT = 1;
var ASSOC_RIGHT = 2;
var ASSOC_NOASSOC = 3;
//Token-Definitions
var TOK_ERROR = 0;
var TOK_EOF = 1;
var TOK_ID = 2;
var TOK_TERM = 3;
var TOK_TERM_S = 4;
var TOK_COLON = 5;
var TOK_SEMICOLON = 6;
var TOK_DELIMITER = 7;
var TOK_SEMANTIC = 8;
var TOK_IGNORE = 9;
var TOK_PREFIX = 10;
//Miscelleanous constants
var DEF_PROD_CODE = "%% = %1;";
//Code generation/output modes
var MODE_GEN_TEXT = 0;
var MODE_GEN_JS = 1;
var MODE_GEN_HTML = 2;
//Executable environment
var EXEC_CONSOLE = 0;
var EXEC_WEB = 1;
//Lexer state construction
var MIN_CHAR = 0;
var MAX_CHAR = 255;
var EDGE_FREE = 0;
var EDGE_EPSILON = 1;
var EDGE_CHAR = 2;
//paker CODE
var PACKER_NONE = 0;
var PACKER_MINIMIZE = 1;
var PACKER_COMPRESS_BASE62 = 2;
var PACKER_COMPRESS_SHRINK = 3;
var PACKER_COMPRESS_BASE62_SHRINK = 4;
/*
Structs
*/
function SYMBOL()
{
var kind; //Symbol kind (SYM_TERM, SYM_NONTERM)
var label; //Symbol label/name
var prods; //Array of associated productions (SYM_NONTERM only)
var first; //Array of first symbols
var associativity; //Associativity mode (SYM_TERM only)
var level; //Association level (SYM_TERM only)
var code; //Code to be executed at token recognition (SYM_TERM only)
var special; //Special symbol
/* --- Flags --- */
var nullable; //Nullable-flag
var defined; //Defined flag
}
function PROD()
{
var lhs;
var rhs;
var level;
var code;
}
function ITEM()
{
var prod;
var dot_offset;
var lookahead;
}
function STATE()
{
var kernel;
var epsilon;
var done;
var closed;
var actionrow;
var gotorow;
}
function NFA()
{
var edge;
var ccl;
var follow;
var follow2;
var accept;
var weight;
}
function DFA()
{
var line;
var nfa_set;
var accept;
var done;
var group;
}
function PARAM()
{
var start;
var end;
}
function TOKEN()
{
var token;
var lexeme;
}
/*
Globals (will be initialized via reset_all()!)
*/
function reset_all(){
assoc_level = 1;
exec_mode = 0;
symbols = new Array();
productions = new Array();
states = new Array();
nfa_states = new Array();
dfa_states = new Array();
lex = new Array();
}
var symbols;
var productions;
var states;
var lex;
var nfa_states;
var dfa_states;
var whitespace_token;
var code_head;
var code_foot;
var errors;
var show_errors;
var warnings;
var show_warnings;
var shifts;
var reduces;
var gotos;
var exec_mode;
var assoc_level;
var regex_weight;
/* -MODULE----------------------------------------------------------------------
JS/CC: A LALR(1) Parser Generator written in JavaScript
Copyright (C) 2007, 2008 by J.M.K S.F. Software Technologies, Jan Max Meyer
http://www.jmksf.com ++ jscc<-AT->jmksf.com
File: debug.js
Author: Jan Max Meyer
Usage: Debug-Functions / Detail progress output
These functions had been designed to both output plain text as well
as HTML-formatted output.
You may use, modify and distribute this software under the terms and conditions
of the Artistic License. Please see ARTISTIC for more information.
----------------------------------------------------------------------------- */
function print_symbols( mode )
{
if( mode == MODE_GEN_HTML )
{
_print( "<table class=\"debug\" cellpadding=\"0\" cellspacing=\"0\">" );
_print( "<tr>" );
_print( "<td class=\"tabtitle\" colspan=\"3\">Symbols Overview</td>" );
_print( "</tr>" );
_print( "<tr>" );
_print( "<td class=\"coltitle\">Symbol</td>" );
_print( "<td class=\"coltitle\">Type</td>" );
_print( "</tr>" );
}
else if( mode == MODE_GEN_TEXT )
_print( "--- Symbol Dump ---" );
for( var i = 0; i < symbols.length; i++ )
{
if( mode == MODE_GEN_HTML )
{
_print( "<tr>" );
_print( "<td>" );
_print( symbols[i].label );
_print( "</td>" );
_print( "<td>" );
_print( ( ( symbols[i].kind == SYM_NONTERM ) ? "Non-terminal" : "Terminal" ) );
_print( "</td>" );
}
else if( mode == MODE_GEN_TEXT )
{
var output = new String();
output = symbols[i].label;
for( var j = output.length; j < 20; j++ )
output += " ";
output += ( ( symbols[i].kind == SYM_NONTERM ) ? "Non-terminal" : "Terminal" );
if( symbols[i].kind == SYM_TERM )
{
for( var j = output.length; j < 40; j++ )
output += " ";
output += symbols[i].level + "/";
switch( symbols[i].assoc )
{
case ASSOC_NONE:
output += "^";
break;
case ASSOC_LEFT:
output += "<";
break;
case ASSOC_RIGHT:
output += ">";
break;
}
}
_print( output );
}
}
if( mode == MODE_GEN_HTML )
_print( "</table>" );
else if( mode == MODE_GEN_TEXT )
_print( "" );
}
function print_grammar( mode )
{
if( mode == MODE_GEN_HTML )
{
_print( "<table class=\"debug\" cellpadding=\"0\" cellspacing=\"0\">" );
_print( "<tr>" );
_print( "<td class=\"tabtitle\" colspan=\"3\">Grammar Overview</td>" );
_print( "</tr>" );
_print( "<tr>" );
_print( "<td class=\"coltitle\">Left-hand side</td>" );
_print( "<td class=\"coltitle\">FIRST-set</td>" );
_print( "<td class=\"coltitle\">Right-hand side</td>" );
_print( "</tr>" );
for( var i = 0; i < symbols.length; i++ )
{
_print( "<tr>" );
alert( "symbols " + i + " = " + symbols[i].label + "(" + symbols[i].kind + ")" );
if( symbols[i].kind == SYM_NONTERM )
{
_print( "<td>" );
_print( symbols[i].label );
_print( "</td>" );
_print( "<td>" );
for( var j = 0; j < symbols[i].first.length; j++ )
{
_print( " <b>" + symbols[symbols[i].first[j]].label + "</b> " );
}
_print( "</td>" );
_print( "<td>" );
for( var j = 0; j < symbols[i].prods.length; j++ )
{
for( var k = 0; k < productions[symbols[i].prods[j]].rhs.length; k++ )
{
if( symbols[productions[symbols[i].prods[j]].rhs[k]].kind == SYM_TERM )
_print( " <b>" + symbols[productions[symbols[i].prods[j]].rhs[k]].label + "</b> " );
else
_print( " " + symbols[productions[symbols[i].prods[j]].rhs[k]].label + " " );
}
_print( "<br />" );
}
_print( "</td>" );
}
_print( "</tr>" );
}
_print( "</table>" );
}
else if( mode == MODE_GEN_TEXT )
{
var output = new String();
for( var i = 0; i < symbols.length; i++ )
{
if( symbols[i].kind == SYM_NONTERM )
{
output += symbols[i].label + " {";
for( var j = 0; j < symbols[i].first.length; j++ )
output += " " + symbols[symbols[i].first[j]].label + " ";
output += "}\n";
for( var j = 0; j < symbols[i].prods.length; j++ )
{
output += "\t";
for( var k = 0; k < productions[symbols[i].prods[j]].rhs.length; k++ )
{
if( symbols[productions[symbols[i].prods[j]].rhs[k]].kind == SYM_TERM )
output += "#" + symbols[productions[symbols[i].prods[j]].rhs[k]].label + " ";
else
output += symbols[productions[symbols[i].prods[j]].rhs[k]].label + " ";
}
output += "\n";
}
}
}
_print( output );
}
}
function print_item_set( mode, label, item_set )
{
var i, j;
if( item_set.length == 0 )
return;
if( mode == MODE_GEN_HTML )
{
_print( "<table class=\"debug\" cellpadding=\"0\" cellspacing=\"0\">" );
_print( "<tr>" );
_print( "<td class=\"tabtitle\" colspan=\"2\">" + label + "</td>" );
_print( "</tr>" );
_print( "<tr>" );
_print( "<td class=\"coltitle\" width=\"35%\">Lookahead</td>" );
_print( "<td class=\"coltitle\" width=\"65%\">Production</td>" );
_print( "</tr>" );
}
else if( mode == MODE_GEN_TEXT )
_print( "--- " + label + " ---" );
for( i = 0; i < item_set.length; i++ )
{
if( mode == MODE_GEN_HTML )
{
_print( "<tr>" );
//alert( "symbols " + i + " = " + symbols[i].label + "(" + symbols[i].kind + ")" );
_print( "<td>" );
for( j = 0; j < item_set[i].lookahead.length; j++ )
{
_print( " <b>" + symbols[item_set[i].lookahead[j]].label + "</b> " );
}
_print( "</td>" );
_print( "<td>" );
_print( symbols[productions[item_set[i].prod].lhs].label + " -> " );
for( j = 0; j < productions[item_set[i].prod].rhs.length; j++ )
{
if( j == item_set[i].dot_offset )
_print( "." );
if( symbols[productions[item_set[i].prod].rhs[j]].kind == SYM_TERM )
_print( " <b>" + symbols[productions[item_set[i].prod].rhs[j]].label + "</b> " );
else
_print( " " + symbols[productions[item_set[i].prod].rhs[j]].label + " " );
}
if( j == item_set[i].dot_offset )
_print( "." );
_print( "</td>" );
_print( "</tr>" );
}
else if( mode == MODE_GEN_TEXT )
{
var out = new String();
out += symbols[productions[item_set[i].prod].lhs].label;
for( j = out.length; j < 20; j++ )
out += " ";
out += " -> ";
for( j = 0; j < productions[item_set[i].prod].rhs.length; j++ )
{
if( j == item_set[i].dot_offset )
out += ".";
if( symbols[productions[item_set[i].prod].rhs[j]].kind == SYM_TERM )
out += " #" + symbols[productions[item_set[i].prod].rhs[j]].label + " ";
else
out += " " + symbols[productions[item_set[i].prod].rhs[j]].label + " ";
}
if( j == item_set[i].dot_offset )
out += ".";
for( j = out.length; j < 60; j++ )
out += " ";
out += "{ ";
for( j = 0; j < item_set[i].lookahead.length; j++ )
out += "#" + symbols[item_set[i].lookahead[j]].label + " ";
out += "}";
_print( out );
}
}
if( mode == MODE_GEN_HTML )
_print( "</table>" );
}
/* -MODULE----------------------------------------------------------------------
JS/CC: A LALR(1) Parser Generator written in JavaScript
Copyright (C) 2007, 2008 by J.M.K S.F. Software Technologies, Jan Max Meyer
http://www.jmksf.com ++ jscc<-AT->jmksf.com
File: first.js
Author: Jan Max Meyer
Usage: FIRST-set calculation
You may use, modify and distribute this software under the terms and conditions
of the Artistic License. Please see ARTISTIC for more information.
----------------------------------------------------------------------------- */
/* -FUNCTION--------------------------------------------------------------------
Function: first()
Author: Jan Max Meyer
Usage: Computes the FIRST-sets for all non-terminals of the
grammar. Must be called right after the parse and before
the table generation methods are performed.
Parameters: void
Returns: void
~~~ CHANGES & NOTES ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Date: Author: Note:
25.08.2008 Jan Max Meyer Here was a bad bug that sometimes came up when
nonterminals are nullable. An example is the
grammar
"A" "B";
##
x: y "B";
y: y "A" | ;
Now it works... embarrassing bug... ;(
----------------------------------------------------------------------------- */
function first()
{
var cnt = 0,
old_cnt = 0;
var nullable;
do
{
old_cnt = cnt;
cnt = 0;
for( var i = 0; i < symbols.length; i++ )
{
if( symbols[i].kind == SYM_NONTERM )
{
for( var j = 0; j < symbols[i].prods.length; j++ )
{
nullable = false;
for( var k = 0; k < productions[symbols[i].prods[j]].rhs.length; k++ )
{
symbols[i].first = union( symbols[i].first, symbols[productions[symbols[i].prods[j]].rhs[k]].first );
nullable = symbols[productions[symbols[i].prods[j]].rhs[k]].nullable;
if( !nullable )
break;
}
cnt += symbols[i].first.length;
if( k == productions[symbols[i].prods[j]].rhs.length )
nullable = true;
symbols[i].nullable |= nullable;
}
}
}
//_print( "first: cnt = " + cnt + " old_cnt = " + old_cnt + "<br />" );
}
while( cnt != old_cnt );
}
/* -FUNCTION--------------------------------------------------------------------
Function: rhs_first()
Author: Jan Max Meyer
Usage: Returns all terminals that are possible from a given position
of a production's right-hand side.
Parameters: item Item to which the lookaheads are added to.
p The production where the computation should
be done on.
begin The offset of the symbol where rhs_first()
begins its calculation from.
Returns: true If the whole rest of the right-hand side can
be null (epsilon),
false else.
~~~ CHANGES & NOTES ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Date: Author: Note:
----------------------------------------------------------------------------- */
function rhs_first( item, p, begin )
{
var f, i, nullable = true;
for( i = begin; i < p.rhs.length; i++ )
{
item.lookahead = union( item.lookahead, symbols[p.rhs[i]].first );
if( !symbols[p.rhs[i]].nullable )
nullable = false;
if( !nullable )
break;
}
return nullable;
}
/* -MODULE----------------------------------------------------------------------
JS/CC: A LALR(1) Parser Generator written in JavaScript
Copyright (C) 2007, 2008 by J.M.K S.F. Software Technologies, Jan Max Meyer
http://www.jmksf.com ++ jscc<-AT->jmksf.com
File: printtab.js
Author: Jan Max Meyer
Usage: Functions for printing the parse tables and related functions.
You may use, modify and distribute this software under the terms and conditions
of the Artistic License. Please see ARTISTIC for more information.
----------------------------------------------------------------------------- */
/* -FUNCTION--------------------------------------------------------------------
Function: print_parse_tables()
Author: Jan Max Meyer
Usage: Prints the parse tables in a desired format.
Parameters: mode The output mode. This can be either
MODE_GEN_JS to create JavaScript/
JScript code as output or MODE_GEN_HTML
to create HTML-tables as output
(the HTML-tables are formatted to
look nice with the JS/CC Web
Environment).
Returns: code The code to be printed to a file or
web-site.
~~~ CHANGES & NOTES ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Date: Author: Note:
----------------------------------------------------------------------------- */
function print_parse_tables( mode )
{
var code = new String();
var i, j, deepest = 0, val;
/* Printing the pop table */
if( mode == MODE_GEN_HTML )
{
code += "<table class=\"print\" cellpadding=\"0\" cellspacing=\"0\">";
code += "<tr>";
code += "<td class=\"tabtitle\" colspan=\"2\">Pop-Table</td>";
code += "</tr>";
code += "<td class=\"coltitle\" width=\"1%\" style=\"border-right: 1px solid lightgray;\">Left-hand side</td>";
code += "<td class=\"coltitle\">Number of symbols to pop</td>";
code += "</tr>";
}
else if( mode == MODE_GEN_JS )
{
code += "/* Pop-Table */\n";
code += "var pop_tab = new Array(\n";
}
for( i = 0; i < productions.length; i++ )
{
if( mode == MODE_GEN_HTML )
{
code += "<tr>";
code += "<td style=\"border-right: 1px solid lightgray;\">" + productions[i].lhs + "</td>";
code += "<td>" + productions[i].rhs.length + "</td>";
code += "</tr>";
}
else if( mode == MODE_GEN_JS )
{
code += "\tnew Array( " + productions[i].lhs + "/* " + symbols[productions[i].lhs].label + " */, "
+ productions[i].rhs.length + " )" +
(( i < productions.length-1 ) ? ",\n" : "\n");
}
}
if( mode == MODE_GEN_HTML )
{
code += "</table>";
}
else if( mode == MODE_GEN_JS )
{
code += ");\n\n";
}
/* Printing the action table */
if( mode == MODE_GEN_HTML )
{
for( i = 0; i < symbols.length; i++ )
if( symbols[i].kind == SYM_TERM )
deepest++;
code += "<table class=\"print\" cellpadding=\"0\" cellspacing=\"0\">";
code += "<tr>";
code += "<td class=\"tabtitle\" colspan=\"" + (deepest + 1) + "\">Action-Table</td>";
code += "</tr>";
code += "<td class=\"coltitle\" width=\"1%\" style=\"border-right: 1px solid lightgray;\">State</td>";
for( i = 0; i < symbols.length; i++ )
{
if( symbols[i].kind == SYM_TERM )
code += "<td><b>" + symbols[i].label + "</b></td>";
}
code += "</tr>";
for( i = 0; i < states.length; i++ )
{
code += "<tr>" ;
code += "<td class=\"coltitle\" style=\"border-right: 1px solid lightgray;\">" + i + "</td>";
for( j = 0; j < symbols.length; j++ )
{
if( symbols[j].kind == SYM_TERM )
{
code += "<td>";
if( ( val = get_table_entry( states[i].actionrow, j ) ) != void(0) )
{
if( val <= 0 )
code += "r" + (val * -1);
else
code += "s" + val;
}
code += "</td>";
}
}
code += "</tr>" ;
}
code += "</table>";
}
else if( mode == MODE_GEN_JS )
{
code += "/* Action-Table */\n";
code += "var act_tab = new Array(\n";
for( i = 0; i < states.length; i++ )
{
code += "\t/* State " + i + " */ new Array( "
for( j = 0; j < states[i].actionrow.length; j++ )
code += states[i].actionrow[j][0] + "/* \"" +
symbols[states[i].actionrow[j][0]].label + "\" */," + states[i].actionrow[j][1]
+ ( ( j < states[i].actionrow.length-1 ) ? " , " : "" );
code += " )" + ( ( i < states.length-1 ) ? ",\n" : "\n" );
}
code += ");\n\n";
}
/* Printing the goto table */
if( mode == MODE_GEN_HTML )
{
for( i = 0; i < symbols.length; i++ )
if( symbols[i].kind == SYM_NONTERM )
deepest++;
code += "<table class=\"print\" cellpadding=\"0\" cellspacing=\"0\">";
code += "<tr>";
code += "<td class=\"tabtitle\" colspan=\"" + (deepest + 1) + "\">Goto-Table</td>";
code += "</tr>";
code += "<td class=\"coltitle\" width=\"1%\" style=\"border-right: 1px solid lightgray;\">State</td>";
for( i = 0; i < symbols.length; i++ )
{
if( symbols[i].kind == SYM_NONTERM )
code += "<td>" + symbols[i].label + "</td>";
}
code += "</tr>";
for( i = 0; i < states.length; i++ )
{
code += "<tr>" ;
code += "<td class=\"coltitle\" style=\"border-right: 1px solid lightgray;\">" + i + "</td>";
for( j = 0; j < symbols.length; j++ )
{
if( symbols[j].kind == SYM_NONTERM )
{
code += "<td>";
if( ( val = get_table_entry( states[i].gotorow, j ) ) != void(0) )
{
code += val;
}
code += "</td>";
}
}
code += "</tr>" ;
}
code += "</table>";
}
else if( mode == MODE_GEN_JS )
{
code += "/* Goto-Table */\n";
code += "var goto_tab = new Array(\n";
for( i = 0; i < states.length; i++ )
{
code += "\t/* State " + i + " */";
code += " new Array( "
for( j = 0; j < states[i].gotorow.length; j++ )
code += states[i].gotorow[j][0] + "/* " + symbols[ states[i].gotorow[j][0] ].label + " */,"
+ states[i].gotorow[j][1] + ( ( j < states[i].gotorow.length-1 ) ? " , " : "" );
code += " )" + ( ( i < states.length-1 ) ? ",\n" : "\n" );
}
code += ");\n\n";
}
return code;
}
/* -FUNCTION--------------------------------------------------------------------
Function: print_dfa_table()
Author: Jan Max Meyer
Usage: Generates a state-machine construction from the deterministic
finite automata.
Parameters: dfa_states The dfa state machine for the lexing
function.
Returns: code The code to be inserted into the
static parser driver framework.
~~~ CHANGES & NOTES ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Date: Author: Note:
----------------------------------------------------------------------------- */
function print_dfa_table( dfa_states )
{
var code = new String();
var i, j, k, eof_id = -1;
var grp_start, grp_first, first;
code += "switch( state )\n"
code += "{\n";
for( i = 0; i < dfa_states.length; i++ )
{
code += " case " + i + ":\n";
first = true;
for( j = 0; j < dfa_states.length; j++ )
{
grp_start = -1;
grp_first = true;
for( k = 0; k < dfa_states[i].line.length + 1; k++ )
{
if( k < dfa_states[i].line.length && dfa_states[i].line[k] == j )
{
if( grp_start == -1 )
grp_start = k;
}
else if( grp_start > -1 )
{
if( grp_first )
{
code += " ";
if( !first )
code += "else ";
code += "if( ";
grp_first = false;
first = false;
}
else
code += " || ";
if( grp_start == k - 1 )
code += "info.src.charCodeAt( pos ) == " + grp_start;
else
code += "( info.src.charCodeAt( pos ) >= " + grp_start +
" && info.src.charCodeAt( pos ) <= " + (k-1) + " )";
grp_start = -1;
k--;
}
}
if( !grp_first )
code += " ) state = " + j + ";\n";
}
code += " ";
if( !first )
code += "else ";
code += "state = -1;\n"
if( dfa_states[i].accept > -1 )
{
code += " match = " + dfa_states[i].accept + ";\n";
code += " match_pos = pos;\n";
}
code += " break;\n\n";
}
code += "}\n\n";
return code;
}
/* -FUNCTION--------------------------------------------------------------------
Function: print_symbol_labels()
Author: Jan Max Meyer
Usage: Prints all symbol labels into an array; This is used for
error reporting purposes only in the resulting parser.
Parameters: void
Returns: code The code to be inserted into the
static parser driver framework.
~~~ CHANGES & NOTES ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Date: Author: Note:
----------------------------------------------------------------------------- */
function print_symbol_labels()
{
var code = new String();
var i;
code += "/* Symbol labels */\n";
code += "var labels = new Array(\n";
for( i = 0; i < symbols.length; i++ )
{
code += "\t\"" + symbols[i].label + "\" ";
if( symbols[i].kind == SYM_TERM )
code += "/* Terminal symbol */";
else
code += "/* Non-terminal symbol */";
if( i < symbols.length-1 )
code += ",";
code += "\n";
}
code += ");\n\n";
return code;
}
/* -FUNCTION--------------------------------------------------------------------
Function: print_term_actions()
Author: Jan Max Meyer
Usage: Prints the terminal symbol actions to be associated with a
terminal definition into a switch-case-construct.
Parameters: void
Returns: code The code to be inserted into the
static parser driver framework.
~~~ CHANGES & NOTES ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Date: Author: Note:
22.08.2008 Jan Max Meyer Bugfix: %offset returned the offset BEHIND the
terminal, now it's the correct value; %source,
which was documented in the manual since v0.24
was not implemented.
----------------------------------------------------------------------------- */
function print_term_actions()
{
var code = new String();
var re = new RegExp( "%match|%offset|%source" );
var i, j, k;
var matches = 0;
var semcode;
var strmatch;
code += "switch( match )\n"
code += "{\n";
for( i = 0; i < symbols.length; i++ )
{
if( symbols[i].kind == SYM_TERM
&& symbols[i].code != "" )
{
code += " case " + i + ":\n";
code += " {\n";
semcode = new String();
for( j = 0, k = 0; j < symbols[i].code.length; j++, k++ )
{
strmatch = re.exec( symbols[i].code.substr( j, symbols[i].code.length ) );
if( strmatch && strmatch.index == 0 )
{
if( strmatch[0] == "%match" )
semcode += "info.att";
else if( strmatch[0] == "%offset" )
semcode += "( info.offset - info.att.length )";