chevrotain
Version:
Chevrotain is a high performance fault tolerant javascript parsing DSL for building recursive decent parsers
47 lines • 1.76 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.defineNameProp = exports.functionName = exports.classNameFromInstance = void 0;
var utils_1 = require("../utils/utils");
function classNameFromInstance(instance) {
return functionName(instance.constructor);
}
exports.classNameFromInstance = classNameFromInstance;
var NAME = "name";
/**
* Utility to obtain Function names.
* Note that there should not be an assumptions on the result of this function.
* E.g: When running from minified source code the result may be auto generated.
*/
function functionName(func) {
// Engines that support Function.prototype.name OR the nth (n>1) time after
// the name has been computed in the following else block.
var existingNameProp = func.name;
/* istanbul ignore else - too many hacks for IE/old versions of node.js here*/
if (existingNameProp) {
return existingNameProp;
}
else {
return "anonymous";
}
}
exports.functionName = functionName;
/**
* @returns {boolean} - has the property been successfully defined
*/
function defineNameProp(obj, nameValue) {
var namePropDescriptor = Object.getOwnPropertyDescriptor(obj, NAME);
/* istanbul ignore else -> will only run in old versions of node.js */
if (utils_1.isUndefined(namePropDescriptor) || namePropDescriptor.configurable) {
Object.defineProperty(obj, NAME, {
enumerable: false,
configurable: true,
writable: false,
value: nameValue
});
return true;
}
/* istanbul ignore next -> will only run in old versions of node.js */
return false;
}
exports.defineNameProp = defineNameProp;
//# sourceMappingURL=lang_extensions.js.map