From: Kevin <kevin@kevin-brown.com>
Date: Tue, 12 May 2020 02:27:38 +0000 (-0400)
Subject: Add support for negated test expressions
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=05d348e29d0528cdae6f2d8bd8048fd9c84bde6f;p=thirdparty%2Fjinja.git

Add support for negated test expressions
---

diff --git a/grammar.ebnf b/grammar.ebnf
index ca6a1992..4933af72 100644
--- a/grammar.ebnf
+++ b/grammar.ebnf
@@ -280,7 +280,9 @@ conditional_expression_operator_in
 conditional_expression_test
     =
     test_variable:variable_identifier
-    {SP}* "is" {SP}*
+    {SP}* "is"
+    [ {SP}+ "not" {SP} negated:`True` ]
+    {SP}*
     test_function:variable_identifier
     [
         {SP}*
diff --git a/new_parser.py b/new_parser.py
index dddae2ba..a14000d7 100644
--- a/new_parser.py
+++ b/new_parser.py
@@ -391,7 +391,7 @@ def parse_conditional_expression_test(ast):
             parse_variable(ast['test_function_parameter'])
         ]
 
-    return nodes.Test(
+    test_node = nodes.Test(
         node,
         name,
         args,
@@ -401,6 +401,14 @@ def parse_conditional_expression_test(ast):
         lineno=lineno_from_parseinfo(ast['parseinfo'])
     )
 
+    if 'negated' in ast and ast['negated']:
+        test_node = nodes.Not(
+            test_node,
+            lineno=lineno_from_parseinfo(ast['parseinfo'])
+        )
+
+    return test_node
+
 def parse_literal(ast):
     if 'literal_type' not in ast:
         raise