voll
Version:
Boolean expressions evaluator.
290 lines (274 loc) • 10.5 kB
JavaScript
/* parser generated by jison 0.4.18 */
/*
Returns a Parser object of the following structure:
Parser: {
yy: {}
}
Parser.prototype: {
yy: {},
trace: function(),
symbols_: {associative list: name ==> number},
terminals_: {associative list: number ==> name},
productions_: [...],
performAction: function anonymous(yytext, yyleng, yylineno, yy, yystate, $$, _$),
table: [...],
defaultActions: {...},
parseError: function(str, hash),
parse: function(input),
lexer: {
EOF: 1,
parseError: function(str, hash),
setInput: function(input),
input: function(),
unput: function(str),
more: function(),
less: function(n),
pastInput: function(),
upcomingInput: function(),
showPosition: function(),
test_match: function(regex_match_array, rule_index),
next: function(),
lex: function(),
begin: function(condition),
popState: function(),
_currentRules: function(),
topState: function(),
pushState: function(condition),
options: {
ranges: boolean (optional: true ==> token location info will include a .range[] member)
flex: boolean (optional: true ==> flex-like lexing behaviour where the rules are tested exhaustively to find the longest match)
backtrack_lexer: boolean (optional: true ==> lexer regexes are tested in order and for each matching regex the action code is invoked; the lexer terminates the scan when a token is returned by the action code)
},
performAction: function(yy, yy_, $avoiding_name_collisions, YY_START),
rules: [...],
conditions: {associative list: name ==> set},
}
}
token location info (@$, _$, etc.): {
first_line: n,
last_line: n,
first_column: n,
last_column: n,
range: [start_number, end_number] (where the numbers are indexes into the input string, regular zero-based)
}
the parseError function receives a 'hash' object with these members for lexer and parser errors: {
text: (matched text)
token: (the produced terminal token, if any)
line: (yylineno)
}
while parser (grammar) errors will also provide these members, i.e. parser errors deliver a superset of attributes: {
loc: (yylloc)
expected: (string describing the set of expected tokens)
recoverable: (boolean: TRUE when the parser has a error recovery rule available for this particular error)
}
*/
var parser = (function(){
var o=function(k,v,o,l){for(o=o||{},l=k.length;l--;o[k[l]]=v);return o},$V0=[1,3],$V1=[1,4],$V2=[1,5],$V3=[1,7],$V4=[1,8],$V5=[5,7,8,11];
var parser = {trace: function trace () { },
yy: {},
symbols_: {"error":2,"expressions":3,"expr":4,"EOF":5,"TOKEN_VAR":6,"TOKEN_AND":7,"TOKEN_OR":8,"TOKEN_NOT":9,"TOKEN_LPAREN":10,"TOKEN_RPAREN":11,"$accept":0,"$end":1},
terminals_: {2:"error",5:"EOF",6:"TOKEN_VAR",7:"TOKEN_AND",8:"TOKEN_OR",9:"TOKEN_NOT",10:"TOKEN_LPAREN",11:"TOKEN_RPAREN"},
productions_: [0,[3,2],[4,1],[4,3],[4,3],[4,2],[4,3]],
performAction: function anonymous(yytext, yyleng, yylineno, yy, yystate /* action[1] */, $$ /* vstack */, _$ /* lstack */) {
/* this == yyval */
var $0 = $$.length - 1;
switch (yystate) {
case 1:
return $$[$0-1];
break;
case 2:
this.$ = new ast.Var(new ast.Token($$[$0]));
break;
case 3:
this.$ = new ast.And(new ast.Token($$[$0-1]), $$[$0-2], $$[$0]);
break;
case 4:
this.$ = new ast.Or(new ast.Token($$[$0-1]), $$[$0-2], $$[$0]);
break;
case 5:
this.$ = new ast.Not(new ast.Token($$[$0-1]), $$[$0]);
break;
case 6:
this.$ = $$[$0-1];
break;
}
},
table: [{3:1,4:2,6:$V0,9:$V1,10:$V2},{1:[3]},{5:[1,6],7:$V3,8:$V4},o($V5,[2,2]),{4:9,6:$V0,9:$V1,10:$V2},{4:10,6:$V0,9:$V1,10:$V2},{1:[2,1]},{4:11,6:$V0,9:$V1,10:$V2},{4:12,6:$V0,9:$V1,10:$V2},o($V5,[2,5]),{7:$V3,8:$V4,11:[1,13]},o($V5,[2,3]),o([5,8,11],[2,4],{7:$V3}),o($V5,[2,6])],
defaultActions: {6:[2,1]},
parseError: function parseError (str, hash) {
if (hash.recoverable) {
this.trace(str);
} else {
var error = new Error(str);
error.hash = hash;
throw error;
}
},
parse: function parse(input) {
var self = this, stack = [0], tstack = [], vstack = [null], lstack = [], table = this.table, yytext = '', yylineno = 0, yyleng = 0, recovering = 0, TERROR = 2, EOF = 1;
var args = lstack.slice.call(arguments, 1);
var lexer = Object.create(this.lexer);
var sharedState = { yy: {} };
for (var k in this.yy) {
if (Object.prototype.hasOwnProperty.call(this.yy, k)) {
sharedState.yy[k] = this.yy[k];
}
}
lexer.setInput(input, sharedState.yy);
sharedState.yy.lexer = lexer;
sharedState.yy.parser = this;
if (typeof lexer.yylloc == 'undefined') {
lexer.yylloc = {};
}
var yyloc = lexer.yylloc;
lstack.push(yyloc);
var ranges = lexer.options && lexer.options.ranges;
if (typeof sharedState.yy.parseError === 'function') {
this.parseError = sharedState.yy.parseError;
} else {
this.parseError = Object.getPrototypeOf(this).parseError;
}
function popStack(n) {
stack.length = stack.length - 2 * n;
vstack.length = vstack.length - n;
lstack.length = lstack.length - n;
}
_token_stack:
var lex = function () {
var token;
token = lexer.lex() || EOF;
if (typeof token !== 'number') {
token = self.symbols_[token] || token;
}
return token;
};
var symbol, preErrorSymbol, state, action, a, r, yyval = {}, p, len, newState, expected;
while (true) {
state = stack[stack.length - 1];
if (this.defaultActions[state]) {
action = this.defaultActions[state];
} else {
if (symbol === null || typeof symbol == 'undefined') {
symbol = lex();
}
action = table[state] && table[state][symbol];
}
if (typeof action === 'undefined' || !action.length || !action[0]) {
var errStr = '';
expected = [];
for (p in table[state]) {
if (this.terminals_[p] && p > TERROR) {
expected.push('\'' + this.terminals_[p] + '\'');
}
}
if (lexer.showPosition) {
errStr = 'Parse error on line ' + (yylineno + 1) + ':\n' + lexer.showPosition() + '\nExpecting ' + expected.join(', ') + ', got \'' + (this.terminals_[symbol] || symbol) + '\'';
} else {
errStr = 'Parse error on line ' + (yylineno + 1) + ': Unexpected ' + (symbol == EOF ? 'end of input' : '\'' + (this.terminals_[symbol] || symbol) + '\'');
}
this.parseError(errStr, {
text: lexer.match,
token: this.terminals_[symbol] || symbol,
line: lexer.yylineno,
loc: yyloc,
expected: expected
});
}
if (action[0] instanceof Array && action.length > 1) {
throw new Error('Parse Error: multiple actions possible at state: ' + state + ', token: ' + symbol);
}
switch (action[0]) {
case 1:
stack.push(symbol);
vstack.push(lexer.yytext);
lstack.push(lexer.yylloc);
stack.push(action[1]);
symbol = null;
if (!preErrorSymbol) {
yyleng = lexer.yyleng;
yytext = lexer.yytext;
yylineno = lexer.yylineno;
yyloc = lexer.yylloc;
if (recovering > 0) {
recovering--;
}
} else {
symbol = preErrorSymbol;
preErrorSymbol = null;
}
break;
case 2:
len = this.productions_[action[1]][1];
yyval.$ = vstack[vstack.length - len];
yyval._$ = {
first_line: lstack[lstack.length - (len || 1)].first_line,
last_line: lstack[lstack.length - 1].last_line,
first_column: lstack[lstack.length - (len || 1)].first_column,
last_column: lstack[lstack.length - 1].last_column
};
if (ranges) {
yyval._$.range = [
lstack[lstack.length - (len || 1)].range[0],
lstack[lstack.length - 1].range[1]
];
}
r = this.performAction.apply(yyval, [
yytext,
yyleng,
yylineno,
sharedState.yy,
action[1],
vstack,
lstack
].concat(args));
if (typeof r !== 'undefined') {
return r;
}
if (len) {
stack = stack.slice(0, -1 * len * 2);
vstack = vstack.slice(0, -1 * len);
lstack = lstack.slice(0, -1 * len);
}
stack.push(this.productions_[action[1]][0]);
vstack.push(yyval.$);
lstack.push(yyval._$);
newState = table[stack[stack.length - 2]][stack[stack.length - 1]];
stack.push(newState);
break;
case 3:
return true;
}
}
return true;
}};
// Load our AST code
var ast = require('./ast');
// Install more detailed error reporting
var SyntaxError = require('./syntax-error');
parser.parseError = function parseError(message, hash) {
throw new SyntaxError(message, hash);
};
// Hook up our lexer
parser.lexer = require('./lexer');
function Parser () {
this.yy = {};
}
Parser.prototype = parser;parser.Parser = Parser;
return new Parser;
})();
if (typeof require !== 'undefined' && typeof exports !== 'undefined') {
exports.parser = parser;
exports.Parser = parser.Parser;
exports.parse = function () { return parser.parse.apply(parser, arguments); };
exports.main = function commonjsMain (args) {
if (!args[1]) {
console.log('Usage: '+args[0]+' FILE');
process.exit(1);
}
var source = require('fs').readFileSync(require('path').normalize(args[1]), "utf8");
return exports.parser.parse(source);
};
if (typeof module !== 'undefined' && require.main === module) {
exports.main(process.argv.slice(1));
}
}