diff options
Diffstat (limited to 'node_modules/lodash/_getTag.js')
-rw-r--r-- | node_modules/lodash/_getTag.js | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/node_modules/lodash/_getTag.js b/node_modules/lodash/_getTag.js new file mode 100644 index 000000000..deaf89d58 --- /dev/null +++ b/node_modules/lodash/_getTag.js @@ -0,0 +1,58 @@ +var DataView = require('./_DataView'), + Map = require('./_Map'), + Promise = require('./_Promise'), + Set = require('./_Set'), + WeakMap = require('./_WeakMap'), + baseGetTag = require('./_baseGetTag'), + toSource = require('./_toSource'); + +/** `Object#toString` result references. */ +var mapTag = '[object Map]', + objectTag = '[object Object]', + promiseTag = '[object Promise]', + setTag = '[object Set]', + weakMapTag = '[object WeakMap]'; + +var dataViewTag = '[object DataView]'; + +/** Used to detect maps, sets, and weakmaps. */ +var dataViewCtorString = toSource(DataView), + mapCtorString = toSource(Map), + promiseCtorString = toSource(Promise), + setCtorString = toSource(Set), + weakMapCtorString = toSource(WeakMap); + +/** + * Gets the `toStringTag` of `value`. + * + * @private + * @param {*} value The value to query. + * @returns {string} Returns the `toStringTag`. + */ +var getTag = baseGetTag; + +// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6. +if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) || + (Map && getTag(new Map) != mapTag) || + (Promise && getTag(Promise.resolve()) != promiseTag) || + (Set && getTag(new Set) != setTag) || + (WeakMap && getTag(new WeakMap) != weakMapTag)) { + getTag = function(value) { + var result = baseGetTag(value), + Ctor = result == objectTag ? value.constructor : undefined, + ctorString = Ctor ? toSource(Ctor) : ''; + + if (ctorString) { + switch (ctorString) { + case dataViewCtorString: return dataViewTag; + case mapCtorString: return mapTag; + case promiseCtorString: return promiseTag; + case setCtorString: return setTag; + case weakMapCtorString: return weakMapTag; + } + } + return result; + }; +} + +module.exports = getTag; |