diff options
Diffstat (limited to 'tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/lang/isNative.js')
-rw-r--r-- | tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/lang/isNative.js | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/lang/isNative.js b/tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/lang/isNative.js new file mode 100644 index 0000000000..f27bb5a701 --- /dev/null +++ b/tools/eslint/node_modules/js-yaml/node_modules/argparse/node_modules/lodash/lang/isNative.js @@ -0,0 +1,54 @@ +var escapeRegExp = require('../string/escapeRegExp'), + isObjectLike = require('../internal/isObjectLike'); + +/** `Object#toString` result references. */ +var funcTag = '[object Function]'; + +/** Used to detect host constructors (Safari > 5). */ +var reIsHostCtor = /^\[object .+?Constructor\]$/; + +/** Used for native method references. */ +var objectProto = Object.prototype; + +/** Used to resolve the decompiled source of functions. */ +var fnToString = Function.prototype.toString; + +/** + * Used to resolve the [`toStringTag`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.prototype.tostring) + * of values. + */ +var objToString = objectProto.toString; + +/** Used to detect if a method is native. */ +var reIsNative = RegExp('^' + + escapeRegExp(objToString) + .replace(/toString|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$' +); + +/** + * Checks if `value` is a native function. + * + * @static + * @memberOf _ + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a native function, else `false`. + * @example + * + * _.isNative(Array.prototype.push); + * // => true + * + * _.isNative(_); + * // => false + */ +function isNative(value) { + if (value == null) { + return false; + } + if (objToString.call(value) == funcTag) { + return reIsNative.test(fnToString.call(value)); + } + return isObjectLike(value) && reIsHostCtor.test(value); +} + +module.exports = isNative; |