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node_modules/debug-fabulous/src/lazy-eval.js

@@ -0,0 +1,46 @@
+var objectAssign = require('object-assign');
+var memoize = require('memoizee');
+
+function _resolveOutput(func, bindThis) {
+  var wrapped = function() {
+    var i = arguments.length;
+    var args = [];
+    while (i--) args[i] = arguments[i];
+
+    // lazy function eval to keep output memory pressure down, if not used
+    if (typeof args[0] === 'function') {
+      args[0] = args[0]();
+    }
+    return func.apply(bindThis, args);
+  };
+  objectAssign(wrapped, func);
+
+  return wrapped;
+}
+
+function wrapEval(_debug) {
+  var debugOrig = _debug;
+
+  function debug(namespace) {
+    function noop() {}
+    var instance = debugOrig(namespace);
+    /*
+      If we're not enabled then don't attempt to log anything.
+      Therefore when a  debug namespace wraps its debug in a
+      closure then it never allocates anything but the function itself
+    */
+    if (!instance.enabled) {
+      objectAssign(noop, instance);
+      return noop;
+    }
+    return _resolveOutput(instance);
+  }
+
+  var debugMemoized = memoize(debug);
+
+  objectAssign(debugMemoized, debugOrig);
+
+  return debugMemoized;
+}
+
+module.exports = wrapEval;