Fix #[ts(rename_all_fields = "...")] on enums containing tuple or unit variants

CHANGELOG.md

@@ -1,8 +1,12 @@
 # master
+
 ### Breaking
+
 ### Features
+
 ### Fixes
 
+Fix `#[ts(rename_all_fields = "...")]` on enums containing tuple or unit variants ([#287](https://github.com/Aleph-Alpha/ts-rs/pull/287))
 
 # 8.1.0
 

macros/src/attr/variant.rs

@@ -21,9 +21,14 @@ pub struct SerdeVariantAttr(VariantAttr);
 
 impl VariantAttr {
     pub fn new(attrs: &[Attribute], enum_attr: &EnumAttr) -> Result<Self> {
+        let mut result = Self::from_attrs(attrs)?;
+        result.rename_all = result.rename_all.or(enum_attr.rename_all_fields);
+        Ok(result)
+    }
+
+    pub fn from_attrs(attrs: &[Attribute]) -> Result<Self> {
         let mut result = Self::default();
         parse_attrs(attrs)?.for_each(|a| result.merge(a));
-        result.rename_all = result.rename_all.or(enum_attr.rename_all_fields);
         #[cfg(feature = "serde-compat")]
         if !result.skip {
             crate::utils::parse_serde_attrs::<SerdeVariantAttr>(attrs)

macros/src/types/enum.rs

@@ -71,7 +71,14 @@ fn format_variant(
     variant: &Variant,
 ) -> syn::Result<()> {
     let crate_rename = enum_attr.crate_rename();
-    let variant_attr = VariantAttr::new(&variant.attrs, enum_attr)?;
+
+    // If `variant.fields` is not a `Fields::Named(_)` the `rename_all_fields`
+    // attribute must be ignored to prevent a `rename_all` from getting to
+    // the newtype, tuple or unit formatting, which would cause an error
+    let variant_attr = match variant.fields {
+        Fields::Unit | Fields::Unnamed(_) => VariantAttr::from_attrs(&variant.attrs)?,
+        Fields::Named(_) => VariantAttr::new(&variant.attrs, enum_attr)?,
+    };
 
     if variant_attr.skip {
         return Ok(());

ts-rs/tests/enum_struct_rename_all.rs

@@ -44,12 +44,16 @@ pub enum TaskStatus2 {
         stdout: String,
         stderr: String,
     },
+
+    A(i32),
+    B(i32, i32),
+    C,
 }
 
 #[test]
 pub fn enum_struct_rename_all_fields() {
     assert_eq!(
         TaskStatus2::inline(),
-        r#"{ "Running": { "started-time": string, } } | { "Terminated": { status: number, stdout: string, stderr: string, } }"#
+        r#"{ "Running": { "started-time": string, } } | { "Terminated": { status: number, stdout: string, stderr: string, } } | { "A": number } | { "B": [number, number] } | "C""#
     )
 }