初始化

康凯

2022-05-20 aa4c235a8ca67ea8b731f90c951a465e92c0a865

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var TYPE = require('../../tokenizer').TYPE;
 
var IDENTIFIER = TYPE.Identifier;
var ASTERISK = TYPE.Asterisk;
var VERTICALLINE = TYPE.VerticalLine;
 
function eatIdentifierOrAsterisk() {
    if (this.scanner.tokenType !== IDENTIFIER &&
        this.scanner.tokenType !== ASTERISK) {
        this.scanner.error('Identifier or asterisk is expected');
    }
 
    this.scanner.next();
}
 
// ident
// ident|ident
// ident|*
// *
// *|ident
// *|*
// |ident
// |*
module.exports = {
    name: 'TypeSelector',
    structure: {
        name: String
    },
    parse: function() {
        var start = this.scanner.tokenStart;
 
        if (this.scanner.tokenType === VERTICALLINE) {
            this.scanner.next();
            eatIdentifierOrAsterisk.call(this);
        } else {
            eatIdentifierOrAsterisk.call(this);
 
            if (this.scanner.tokenType === VERTICALLINE) {
                this.scanner.next();
                eatIdentifierOrAsterisk.call(this);
            }
        }
 
        return {
            type: 'TypeSelector',
            loc: this.getLocation(start, this.scanner.tokenStart),
            name: this.scanner.substrToCursor(start)
        };
    },
    generate: function(node) {
        this.chunk(node.name);
    }
};