Fix parsing calls

This change:

* adds a cut when the leading `(` was encountered, and
* fixed the interaction between call expressions and boolean OR.

3 files changed, 33 insertions, 6 deletions

diff --git a/askama_parser/src/expr.rs b/askama_parser/src/expr.rs
index ef5c5e2..ab7caff 100644
--- a/askama_parser/src/expr.rs
+++ b/askama_parser/src/expr.rs
@@ -68,10 +68,12 @@ pub enum Expr<'a> {
 
 impl<'a> Expr<'a> {
     pub(super) fn arguments(i: &'a str) -> IResult<&'a str, Vec<Self>> {
-        delimited(
+        preceded(
             ws(char('(')),
-            separated_list0(char(','), ws(Self::parse)),
-            ws(char(')')),
+            cut(terminated(
+                separated_list0(char(','), ws(Self::parse)),
+                char(')'),
+            )),
         )(i)
     }
 
diff --git a/askama_parser/src/tests.rs b/askama_parser/src/tests.rs
index 5b3b66e..2beeb38 100644
--- a/askama_parser/src/tests.rs
+++ b/askama_parser/src/tests.rs
@@ -493,9 +493,34 @@ fn test_odd_calls() {
         Ast::from_str("{{ -a(b) }}", &syntax).unwrap().nodes,
         vec![Node::Expr(
             Ws(None, None),
-            Unary("-", Box::new(Call(Box::new(Var("a")), vec![Var("b")])),),
+            Unary("-", Box::new(Call(Box::new(Var("a")), vec![Var("b")]))),
         )],
     );
+    assert_eq!(
+        Ast::from_str("{{ a(b)|c }}", &syntax).unwrap().nodes,
+        vec![Node::Expr(
+            Ws(None, None),
+            Filter("c", vec![Call(Box::new(Var("a")), vec![Var("b")])]),
+        )]
+    );
+    assert_eq!(
+        Ast::from_str("{{ a(b)| c }}", &syntax).unwrap().nodes,
+        vec![Node::Expr(
+            Ws(None, None),
+            Filter("c", vec![Call(Box::new(Var("a")), vec![Var("b")])]),
+        )]
+    );
+    assert_eq!(
+        Ast::from_str("{{ a(b) |c }}", &syntax).unwrap().nodes,
+        vec![Node::Expr(
+            Ws(None, None),
+            BinOp(
+                "|",
+                Box::new(Call(Box::new(Var("a")), vec![Var("b")])),
+                Box::new(Var("c"))
+            ),
+        )]
+    );
 }
 
 #[test]
diff --git a/testing/tests/ui/loop_cycle_empty.stderr b/testing/tests/ui/loop_cycle_empty.stderr
index 13beb9a..4fc35bb 100644
--- a/testing/tests/ui/loop_cycle_empty.stderr
+++ b/testing/tests/ui/loop_cycle_empty.stderr
@@ -1,5 +1,5 @@
-error: problems parsing template source at row 1, column 34 near:
-       "([]) }}{{ v }},{% endfor %}"
+error: problems parsing template source at row 1, column 35 near:
+       "[]) }}{{ v }},{% endfor %}"
  --> tests/ui/loop_cycle_empty.rs:6:10
   |
 6 | #[derive(Template)]