blob: 199b04e0d16184469c5c53de9d5fb1fabee27b32 (
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"use strict";
/**
* Returns a display name for a function
*
* @param {Function} func
* @returns {string}
*/
module.exports = function functionName(func) {
if (!func) {
return "";
}
try {
return (
func.displayName ||
func.name ||
// Use function decomposition as a last resort to get function
// name. Does not rely on function decomposition to work - if it
// doesn't debugging will be slightly less informative
// (i.e. toString will say 'spy' rather than 'myFunc').
(String(func).match(/function ([^\s(]+)/) || [])[1]
);
} catch (e) {
// Stringify may fail and we might get an exception, as a last-last
// resort fall back to empty string.
return "";
}
};
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