Allow using "with" keyword in "let" statements

Askama uses the syntax `{% when Variant with (parameters) %}` in
`{% match %}` blocks.

This change allows the optional use of the keyword "with" in "let" and
"if let" statements, too.

1 files changed, 14 insertions, 0 deletions

diff --git a/testing/tests/let_destructoring.rs b/testing/tests/let_destructoring.rs
index 20f7fff..5cb7ae4 100644
--- a/testing/tests/let_destructoring.rs
+++ b/testing/tests/let_destructoring.rs
@@ -105,3 +105,17 @@ fn test_let_destruct_with_path() {
     };
     assert_eq!(t.render().unwrap(), "hello");
 }
+
+#[derive(Template)]
+#[template(source = "{% let some::path::Struct with (v) = v %}{{v}}", ext = "txt")]
+struct LetDestructoringWithPathAndWithKeyword<'a> {
+    v: some::path::Struct<'a>,
+}
+
+#[test]
+fn test_let_destruct_with_path_and_with_keyword() {
+    let t = LetDestructoringWithPathAndWithKeyword {
+        v: some::path::Struct("hello"),
+    };
+    assert_eq!(t.render().unwrap(), "hello");
+}