allow useCurrent to ignore the fact that there is no context

inject-core.coffee

@@ -146,11 +146,11 @@ useInjector = (injector,fn) ->
 		finally
 			CONTEXT.pop()
 
-inject.useCurrent = (fn) ->
+inject.useCurrent = (fn,ignoreNoContext) ->
 	context = last(CONTEXT);
-	unless context
+	unless context or ignoreNoContext
 		noContext()
-	useInjector(context,fn)
+	if context then useInjector(context,fn) else fn
 
 noContext = ->
 	throw new Error("""There is no current injector.

inject-core.js

@@ -169,11 +169,15 @@
     };
   };
 
-  inject.useCurrent = function(fn) {
+  inject.useCurrent = function(fn, ignoreNoContext) {
     var context;
     context = last(CONTEXT);
-    if (!context) noContext();
-    return useInjector(context, fn);
+    if (!(context || ignoreNoContext)) noContext();
+    if (context) {
+      return useInjector(context, fn);
+    } else {
+      return fn;
+    }
   };
 
   noContext = function() {

test/qunit/inject_test.coffee

@@ -355,6 +355,7 @@ test "destroy the context", ->
 
 
 test "capturing the current context", ->
+	expect 2
 	injector = Inject
 		name: 'foo'
 		factory: -> 123
@@ -367,6 +368,10 @@ test "capturing the current context", ->
 		)),200)
 	)()
 
+	Inject.useCurrent(->
+		ok(true,'Can ignore no context')
+	,true).call this
+
 test "error on no context", ->
 	expect(1)
 	try

test/qunit/inject_test.js

@@ -431,19 +431,23 @@
 
   test("capturing the current context", function() {
     var injector;
+    expect(2);
     injector = Inject({
       name: 'foo',
       factory: function() {
         return 123;
       }
     });
     stop();
-    return injector(function() {
+    injector(function() {
       return setTimeout(Inject.useCurrent(Inject.require('foo', function(foo) {
         equals(foo, 123);
         return start();
       })), 200);
     })();
+    return Inject.useCurrent(function() {
+      return ok(true, 'Can ignore no context');
+    }, true).call(this);
   });
 
   test("error on no context", function() {