fixed: function and blocks were incorrectly cached

(now we have a tree in Item::Function.parameters too
        and we should go through that tree as well)
fixed: in Generator: Item::Function.par should be cleared
       only if Item::Function.name is not empty
changed: in Generator: use method 'write' of an output stream
       instead of operator<<
added: Clear() method to Blocks class
changed: in Generator
       Generator has its own Vars class now
       we don't need SetVars() method
added: to Generator:
       void CanUseCache(bool can_use_cache);
       // set whether or not we can use cache for functions or blocks
       // true by default

       void CanUseVars(bool can_use_variables);
       // set whether or not we can use variables: [def ...] statement
       // true by default





git-svn-id: svn://ttmath.org/publicrep/ezc/trunk@977 e52654a7-88a9-db11-a3e9-0013d4bc506e

src/blocks.cpp

@@ -66,12 +66,18 @@ Blocks::Iterator Blocks::End()
 }
 
 
-size_t Blocks::Size()
+size_t Blocks::Size() const
 {
 	return blocks_tab.size();
 }
 
 
+void Blocks::Clear()
+{
+	blocks_tab.clear();
+}
+
+
 void Blocks::ClearCache()
 {
 	BlocksTable::iterator i = blocks_tab.begin();