enabling passed functions to fire implicit method calls

lib/coffee_script/rewriter.rb

@@ -22,7 +22,7 @@ module CoffeeScript
     IMPLICIT_END  = [:IF, :UNLESS, :FOR, :WHILE, "\n", :PARAM_START, :OUTDENT]
     IMPLICIT_CALL = [:IDENTIFIER, :NUMBER, :STRING, :JS, :REGEX, :NEW, :PARAM_START,
                      :TRY, :DELETE, :INSTANCEOF, :TYPEOF, :SWITCH, :ARGUMENTS,
-                     :TRUE, :FALSE, :YES, :NO, :ON, :OFF, '!', '!!', :NOT]
+                     :TRUE, :FALSE, :YES, :NO, :ON, :OFF, '!', '!!', :NOT, '=>']
 
     # The inverse mappings of token pairs we're trying to fix up.
     INVERSES = BALANCED_PAIRS.inject({}) do |memo, pair|

test/fixtures/execution/test_functions.coffee

@@ -52,3 +52,6 @@ print Math.FastAdd(20, 20) is 40
 print 100 > 1 if 1 > 0
 print true unless false
 print true for i in [1..3]
+
+print_func: (f) => print(f())
+print_func => true