Removing log messages and adding a test case for builtin functions.

context.cpp

@@ -21,17 +21,14 @@ namespace Sass {
   }
   
   inline void Context::register_function(Function_Descriptor d, Implementation ip)
-  {
-    function_env[d[0]] = Function(d, ip);
-    cerr << "Registered function: " << d[0] << endl;
-    cerr << "Verifying " << function_env[string(d[0])].name << endl;
-  }
+  { function_env[d[0]] = Function(d, ip); }
   
   void Context::register_functions()
   {
     using namespace Functions;
     register_function(rgb_descriptor,  rgb);
     register_function(rgba_descriptor, rgba);
+    register_function(curse_descriptor, curse);
   }
   
 }
\ No newline at end of file

eval_apply.cpp

@@ -148,7 +148,6 @@ namespace Sass {
       
       case Node::function_call: {
         // TO DO: default-constructed Function should be a generic callback
-        cerr << "about to apply " << expr[0].content.token.to_string() << endl;
         return apply_function(f_env[expr[0].content.token.to_string()], expr[1], env, f_env);
       } break;
       

functions.cpp

 #include "functions.hpp"
 #include <iostream>
+#
 using std::cerr; using std::endl;
 
 namespace Sass {
   namespace Functions {
 
-  // TO DO: functions need to check the types of their arguments
+    // TO DO: functions need to check the types of their arguments
 
     Function_Descriptor rgb_descriptor = 
     { "rgb", "$red", "$green", "$blue", 0 };
     Node rgb(const vector<Token>& parameters, map<Token, Node>& bindings) {
-      cerr << "rgb arg count: " << bindings.size() << endl;
       Node color(Node::numeric_color, 0, 3);
       color << bindings[parameters[0]]
             << bindings[parameters[1]]
@@ -28,6 +28,11 @@ namespace Sass {
             << bindings[parameters[3]];
       return color;
     }
-
+    
+    extern const char* the_curse = "Damn!";
+    Function_Descriptor curse_descriptor = { "curse", 0 };
+    Node curse(const vector<Token>& parameters, map<Token, Node>& bindings) {
+      return Node(Node::identifier, 0, Token::make(the_curse, the_curse + std::strlen(the_curse)));
+    }
   }
 }
\ No newline at end of file

functions.hpp

@@ -48,6 +48,9 @@ namespace Sass {
 
     extern Function_Descriptor rgba_descriptor;
     Node rgba(const vector<Token>& parameters, map<Token, Node>& bindings);
+    
+    extern Function_Descriptor curse_descriptor;
+    Node curse(const vector<Token>& parameters, map<Token, Node>& bindings);
   }
   
 }

spec/basic/21_one_builtin_function/input.scss

+div {
+  color: rgb(255, $blue: 0, $green: 255);
+  background: rgb(123, 45, 6);
+}

spec/basic/21_one_builtin_function/output.css

+div {
+  color: yellow;
+  background: #7b2d06; }