Fix #4576: Allow accessing a property of a function literal (like `.call`) via chaining syntax (#4665)

lib/coffeescript/grammar.js

@@ -487,6 +487,10 @@
       function() {
         return $1.add($2);
       }),
+      o('Code Accessor',
+      function() {
+        return new Value($1).add($2);
+      }),
       o('ThisProperty')
     ],
     // Everything that can be assigned to.

src/grammar.coffee

@@ -316,6 +316,7 @@ grammar =
   SimpleAssignable: [
     o 'Identifier',                             -> new Value $1
     o 'Value Accessor',                         -> $1.add $2
+    o 'Code Accessor',                          -> new Value($1).add $2
     o 'ThisProperty'
   ]
 

test/formatting.coffee

@@ -407,3 +407,16 @@ test "#3199: throw multiline implicit object", ->
       type: 'a'
       msg: 'b'
   eq undefined, y
+
+test "#4576: multiple row function chaining", ->
+  ->
+    eq @a, 3
+  .call a: 3
+
+test "#4576: function chaining on separate rows", ->
+  do ->
+    Promise
+    .resolve()
+    .then ->
+      yes
+    .then ok