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1 files changed, 86 insertions, 0 deletions

diff --git a/node_modules/when/monitor/error.js b/node_modules/when/monitor/error.js
new file mode 100644
index 00000000..63825e2c
--- /dev/null
+++ b/node_modules/when/monitor/error.js
@@ -0,0 +1,86 @@
+/** @license MIT License (c) copyright 2010-2014 original author or authors */
+/** @author Brian Cavalier */
+/** @author John Hann */
+
+(function(define) { 'use strict';
+define(function() {
+
+	var parse, captureStack, format;
+
+	if(Error.captureStackTrace) {
+		// Use Error.captureStackTrace if available
+		parse = function(e) {
+			return e && e.stack && e.stack.split('\n');
+		};
+
+		format = formatAsString;
+		captureStack = Error.captureStackTrace;
+
+	} else {
+		// Otherwise, do minimal feature detection to determine
+		// how to capture and format reasonable stacks.
+		parse = function(e) {
+			var stack = e && e.stack && e.stack.split('\n');
+			if(stack && e.message) {
+				stack.unshift(e.message);
+			}
+			return stack;
+		};
+
+		(function() {
+			var e = new Error();
+			if(typeof e.stack !== 'string') {
+				format = formatAsString;
+				captureStack = captureSpiderMonkeyStack;
+			} else {
+				format = formatAsErrorWithStack;
+				captureStack = useStackDirectly;
+			}
+		}());
+	}
+
+	function captureSpiderMonkeyStack(host) {
+		try {
+			throw new Error();
+		} catch(err) {
+			host.stack = err.stack;
+		}
+	}
+
+	function useStackDirectly(host) {
+		host.stack = new Error().stack;
+	}
+
+	function formatAsString(longTrace) {
+		return join(longTrace);
+	}
+
+	function formatAsErrorWithStack(longTrace) {
+		var e = new Error();
+		e.stack = formatAsString(longTrace);
+		return e;
+	}
+
+	// About 5-10x faster than String.prototype.join o_O
+	function join(a) {
+		var sep = false;
+		var s = '';
+		for(var i=0; i< a.length; ++i) {
+			if(sep) {
+				s += '\n' + a[i];
+			} else {
+				s+= a[i];
+				sep = true;
+			}
+		}
+		return s;
+	}
+
+	return {
+		parse: parse,
+		format: format,
+		captureStack: captureStack
+	};
+
+});
+}(typeof define === 'function' && define.amd ? define : function(factory) { module.exports = factory(); }));