57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
|
var TYPE = require('../../tokenizer').TYPE;
|
||
|
|
var CHARCODE = require('../../tokenizer').CHARCODE;
|
||
|
|
|
||
|
|
var IDENT = TYPE.Ident;
|
||
|
|
var PLUSSIGN = CHARCODE.PlusSign;
|
||
|
|
var SOLIDUS = CHARCODE.Solidus;
|
||
|
|
var GREATERTHANSIGN = CHARCODE.GreaterThanSign;
|
||
|
|
var TILDE = CHARCODE.Tilde;
|
||
|
|
|
||
|
|
// + | > | ~ | /deep/
|
||
|
|
module.exports = {
|
||
|
|
name: 'Combinator',
|
||
|
|
structure: {
|
||
|
|
name: String
|
||
|
|
},
|
||
|
|
parse: function() {
|
||
|
|
var start = this.scanner.tokenStart;
|
||
|
|
var code = this.scanner.source.charCodeAt(this.scanner.tokenStart);
|
||
|
|
|
||
|
|
switch (code) {
|
||
|
|
case GREATERTHANSIGN:
|
||
|
|
case PLUSSIGN:
|
||
|
|
case TILDE:
|
||
|
|
this.scanner.next();
|
||
|
|
break;
|
||
|
|
|
||
|
|
case SOLIDUS:
|
||
|
|
this.scanner.next();
|
||
|
|
|
||
|
|
if (this.scanner.tokenType !== IDENT || this.scanner.lookupValue(0, 'deep') === false) {
|
||
|
|
this.error('Identifier `deep` is expected');
|
||
|
|
}
|
||
|
|
|
||
|
|
this.scanner.next();
|
||
|
|
|
||
|
|
if (!this.scanner.isDelim(SOLIDUS)) {
|
||
|
|
this.error('Solidus is expected');
|
||
|
|
}
|
||
|
|
|
||
|
|
this.scanner.next();
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
this.error('Combinator is expected');
|
||
|
|
}
|
||
|
|
|
||
|
|
return {
|
||
|
|
type: 'Combinator',
|
||
|
|
loc: this.getLocation(start, this.scanner.tokenStart),
|
||
|
|
name: this.scanner.substrToCursor(start)
|
||
|
|
};
|
||
|
|
},
|
||
|
|
generate: function(node) {
|
||
|
|
this.chunk(node.name);
|
||
|
|
}
|
||
|
|
};
|