Add regression test for * and & in expressions

testing/tests/ref_deref.rs

@@ -0,0 +1,62 @@
+use rinja::Template;
+
+#[derive(Template)]
+#[template(
+    source = r#"
+{%- if *title == "something" -%}
+something1
+{%- elif title == &"another" -%}
+another2
+{%- elif &*title == &&*"yep" -%}
+yep3
+{%- else -%}
+{{title}}
+{%- endif -%}
+"#,
+    ext = "html"
+)]
+struct RefDeref {
+    title: &'static &'static str,
+}
+
+#[test]
+fn test_ref_deref() {
+    let x = RefDeref {
+        title: &"something",
+    };
+    assert_eq!(x.render().unwrap(), "something1");
+
+    let x = RefDeref { title: &"another" };
+    assert_eq!(x.render().unwrap(), "another2");
+
+    let x = RefDeref { title: &"yep" };
+    assert_eq!(x.render().unwrap(), "yep3");
+
+    let x = RefDeref { title: &"bla" };
+    assert_eq!(x.render().unwrap(), "bla");
+}
+
+#[derive(Template)]
+#[template(
+    source = r#"
+{%- let x = *title -%}
+{%- if x == "another" -%}
+another2
+{%- else -%}
+{{x}}
+{%- endif -%}
+"#,
+    ext = "html"
+)]
+struct RefDerefAssignment {
+    title: &'static &'static str,
+}
+
+#[test]
+fn test_ref_deref_assign() {
+    let x = RefDerefAssignment { title: &"another" };
+    assert_eq!(x.render().unwrap(), "another2");
+
+    let x = RefDerefAssignment { title: &"two" };
+    assert_eq!(x.render().unwrap(), "two");
+}

testing/tests/ui/ref_deref.rs

@@ -0,0 +1,8 @@
+use rinja::Template;
+
+#[derive(Template)]
+#[template(source = "{% let *x = 2 %}", ext = "html")]
+struct WrongRefDeref;
+
+fn main() {
+}

testing/tests/ui/ref_deref.stderr

@@ -0,0 +1,8 @@
+error: failed to parse template source at row 1, column 7 near:
+       "*x = 2 %}"
+ --> tests/ui/ref_deref.rs:3:10
+  |
+3 | #[derive(Template)]
+  |          ^^^^^^^^
+  |
+  = note: this error originates in the derive macro `Template` (in Nightly builds, run with -Z macro-backtrace for more info)