AST: Handle L'x'

lib/tokenlist.cpp

@@ -413,6 +413,8 @@ static void compileTerm(Token *& tok, std::stack<Token*> &op)
 {
     if (!tok)
         return;
+    if (Token::Match(tok, "L %str%|%char%"))
+        tok = tok->next();
     if (tok->isLiteral()) {
         op.push(tok);
         tok = tok->next();

test/testtokenize.cpp

@@ -9991,6 +9991,9 @@ private:
         testAst("char a[1]=\"\";"); // don't crash
         testAst("int f(char argv[]);"); // don't crash
         testAst("--"); // don't crash
+
+        ASSERT_EQUALS("'X''a'>", testAst("('X' > 'a')"));
+        ASSERT_EQUALS("'X''a'>", testAst("(L'X' > L'a')"));
     }
 
     void astpar() const { // parentheses