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Edit File: identity.js

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;

export { ALIAS, DOC, MAP, NODE_TYPE, PAIR, SCALAR, SEQ, hasAnchor, isAlias, isCollection, isDocument, isMap, isNode, isPair, isScalar, isSeq };

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