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var Montage = require("montage").Montage;
var Parser = exports.Parser = Montage.create(Montage, {
newWithLanguage: {
value: function (language, callback) {
var self = Montage.create(this);
self.tokens = [];
self.state = language.parsePrevious(function (syntax) {
callback && callback(syntax);
return language.parseEof();
});
return self;
}
},
state: {
value: null,
writable: true
},
emit: {
value: function (token) {
try {
this.tokens.push(token);
this.state = this.state(token);
return this;
} catch (exception) {
if (exception instanceof SyntaxError) {
throw new SyntaxError(exception.message + ' at ' + this.format());
} else {
throw exception;
}
}
}
},
state: {
value: null,
writable: true
},
syntax: {
value: null,
writable: true,
serializable: true
},
format: {
value: function () {
return this.tokens.reduce(function (hither, token) {
if (token.type === 'literal') {
return hither + '(' + JSON.stringify(token.value) + ')';
} else {
return hither + '.' + token.type;
}
}, 'Selector');
}
}
});
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