predeclared identifiers

http://golang.org/ref/spec#Predeclared_identifiers

lib/coderay/scanners/go.rb

@@ -31,6 +31,11 @@ class Go < Scanner
       'nil', 'iota',
       'true', 'false',
     ]  # :nodoc:
+
+    PREDEFINED_FUNCTIONS = %w[
+      append cap close complex copy delete imag len
+      make new panic print println real recover
+    ] # :nodoc:
 
     DIRECTIVES = [
       'go_no_directive',  # Seems no directive concept in Go?
@@ -40,7 +45,8 @@ class Go < Scanner
       add(KEYWORDS, :keyword).
       add(PREDEFINED_TYPES, :predefined_type).
       add(DIRECTIVES, :directive).
-      add(PREDEFINED_CONSTANTS, :predefined_constant)  # :nodoc:
+      add(PREDEFINED_CONSTANTS, :predefined_constant).
+      add(PREDEFINED_FUNCTIONS, :predefined)  # :nodoc:
 
     ESCAPE = / [rbfntv\n\\'"] | x[a-fA-F0-9]{1,2} | [0-7]{1,3} /x  # :nodoc:
     UNICODE_ESCAPE =  / u[a-fA-F0-9]{4} | U[a-fA-F0-9]{8} /x  # :nodoc: