Started implementation of function parsing

function.h

@@ -5,8 +5,17 @@
 // Register a new function. Returns false if a function with the same name already exists
 const bool function_register(const std::string name, const uint32_t address);
 
-// Add a parameter to the last registered function
-void function_parameter_add(const std::string name, const int type);
+// Set the return type of the last searched function
+void function_set_type(const uint32_t type);
+
+// Get the return type of the last searched function or -1 if none
+const int function_get_type();
+
+// Add a parameter to the last registered function, returns false if there's a parameter already named like that
+const bool function_parameter_add(const std::string name, const uint32_t type);
+
+// Check if there's a function with that name
+const bool function_exists(const std::string name);
 
 
 // Retrieve the address of the specified function, or zero if there's no such function