[Backport generator] Keep track of current source code in Debug mode,

also fixed some warnings

(cherry picked from commit MeVisLab/pythonqt@5f3bd64)

Author: usiems

generator/parser/ast.cpp

@@ -48,5 +48,5 @@ QString AST::toString(TokenStream *stream) const
 {
     const Token &tk = stream->token((int) start_token);
     const Token &end_tk = stream->token ((int) end_token);
-    return QString::fromLatin1(tk.text + tk.position, end_tk.position - tk.position);
+    return QString::fromLatin1(tk.text + tk.position, static_cast<int>(end_tk.position - tk.position));
 }

generator/parser/binder.cpp

@@ -817,7 +817,7 @@ void Binder::visitQEnums(QEnumsAST *node)
   const Token &start = _M_token_stream->token((int) node->start_token);
   const Token &end = _M_token_stream->token((int) node->end_token);
   QStringList enum_list = QString::fromLatin1(start.text + start.position,
-                                              end.position - start.position).split(' ');
+                                              static_cast<int>(end.position - start.position)).split(' ');
 
   ScopeModelItem scope = currentScope();
   for (int i = 0; i < enum_list.size(); ++i) {
@@ -833,7 +833,7 @@ void Binder::visitQProperty(QPropertyAST *node)
     const Token &start = _M_token_stream->token((int) node->start_token);
     const Token &end = _M_token_stream->token((int) node->end_token);
     QString property = QString::fromLatin1(start.text + start.position,
-                                           end.position - start.position);
+                                           static_cast<int>(end.position - start.position));
     _M_current_class->addPropertyDeclaration(property);
 }
 

generator/parser/lexer.h

@@ -168,10 +168,10 @@ class TokenStream
   inline std::size_t matchingBrace(std::size_t i) const
   { return tokens[i].extra.right_brace; }
 
-  inline Token &operator[](int i)
+  inline Token &operator[](std::size_t i)
   { return tokens[i]; }
 
-  inline const Token &token(int i) const
+  inline const Token &token(std::size_t i) const
   { return tokens[i]; }
 
 private: