start using precedences, working good with only a few test fails

2014-03-09 02:10:59 +01:00
parent 48dd8f9cb0
commit 61fa9b7fb4
3 changed files with 22 additions and 4 deletions
@@ -73,7 +73,7 @@ class Precedence(object):


 def create_precedence(expression_list):
-    iterator = PushBackIterator(expression_list)
+    iterator = PushBackIterator(iter(expression_list))
    return _check_operator(iterator)


@@ -149,3 +149,7 @@ def _check_operator(iterator, priority=PythonGrammar.LOWEST_PRIORITY):
        else:
            left = Precedence(left, str(operator), right)
    return left
+
+
+def calculate(left, operator, right):
+    return left + right