Node.js
2.14 KB
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'use strict';
const ALIAS = Symbol.for('yaml.alias');
const DOC = Symbol.for('yaml.document');
const MAP = Symbol.for('yaml.map');
const PAIR = Symbol.for('yaml.pair');
const SCALAR = Symbol.for('yaml.scalar');
const SEQ = Symbol.for('yaml.seq');
const NODE_TYPE = Symbol.for('yaml.node.type');
const isAlias = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === ALIAS;
const isDocument = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === DOC;
const isMap = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === MAP;
const isPair = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === PAIR;
const isScalar = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === SCALAR;
const isSeq = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === SEQ;
function isCollection(node) {
if (node && typeof node === 'object')
switch (node[NODE_TYPE]) {
case MAP:
case SEQ:
return true;
}
return false;
}
function isNode(node) {
if (node && typeof node === 'object')
switch (node[NODE_TYPE]) {
case ALIAS:
case MAP:
case SCALAR:
case SEQ:
return true;
}
return false;
}
const hasAnchor = (node) => (isScalar(node) || isCollection(node)) && !!node.anchor;
class NodeBase {
constructor(type) {
Object.defineProperty(this, NODE_TYPE, { value: type });
}
/** Create a copy of this node. */
clone() {
const copy = Object.create(Object.getPrototypeOf(this), Object.getOwnPropertyDescriptors(this));
if (this.range)
copy.range = this.range.slice();
return copy;
}
}
exports.ALIAS = ALIAS;
exports.DOC = DOC;
exports.MAP = MAP;
exports.NODE_TYPE = NODE_TYPE;
exports.NodeBase = NodeBase;
exports.PAIR = PAIR;
exports.SCALAR = SCALAR;
exports.SEQ = SEQ;
exports.hasAnchor = hasAnchor;
exports.isAlias = isAlias;
exports.isCollection = isCollection;
exports.isDocument = isDocument;
exports.isMap = isMap;
exports.isNode = isNode;
exports.isPair = isPair;
exports.isScalar = isScalar;
exports.isSeq = isSeq;