Method _eat

source/python.js:1711–1718

(type, value)

                return new ast.arguments(posonlyargs, args, vararg, kwonlyargs, kw_defaults, kwarg, defaults);
            }
            _eat(type, value) {
                if (this._tokenizer.match(type, value)) {
                    const position = this._position();
                    this._tokenizer.expect(type, value);
                    return position;
                }
                return null;
            }
            _mark(node, position) {
                node.filename = position.filename;
                node.lineno = position.lineno;