improved error messages for attribute-less tuple struct fields

2 files changed, 12 insertions, 2 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 899ebfb..915fe78 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -96,8 +96,18 @@ mod get {
                 Some(Ok(get_attr)) if get_attr.method.is_some() => {
                     format_ident!("{}", get_attr.method.unwrap().as_str())
                 }
+                // Currently unreachable because an empty GetAttrubute is an error, and there is only
+                // one field that can be set right now.
+                Some(Ok(_)) => {
+                    return Err(concat!(
+                        r#"expected name value pair on tuple struct field"#,
+                        " ",
+                        r#"(e.g #[get("method" = method_name)])"#
+                    )
+                    .into())
+                }
                 Some(Err(e)) => return Err(e),
-                _ => return Err(r#"tuple fields are required to have an attribute"#.into()),
+                None => return Err(r#"expected attribute on tuple struct field"#.into()),
             };
             let getter = expand_getter(
                 field,
diff --git a/tests/trybuild/tuple-struct-without-attribute.stderr b/tests/trybuild/tuple-struct-without-attribute.stderr
index 7ddd8c6..33791f4 100644
--- a/tests/trybuild/tuple-struct-without-attribute.stderr
+++ b/tests/trybuild/tuple-struct-without-attribute.stderr
@@ -4,4 +4,4 @@ error: proc-macro derive panicked
 3 | #[derive(Get)]
   |          ^^^
   |
-  = help: message: called `Result::unwrap()` on an `Err` value: "tuple fields are required to have an attribute"
+  = help: message: called `Result::unwrap()` on an `Err` value: "expected attribute on tuple struct field"