TypeScript: quote property names that are not valid identifiers

core/data/tests/can_quote_non_identifier_field_names/input.rs

@@ -0,0 +1,11 @@
+#[typeshare]
+pub struct LinkedData {
+    #[serde(rename = "@type")]
+    pub kind: String,
+    #[serde(rename = "schema.org")]
+    pub schema_org: String,
+    #[serde(rename = "2fa")]
+    pub two_factor: bool,
+    #[serde(rename = "$ref")]
+    pub reference: String,
+}

core/data/tests/can_quote_non_identifier_field_names/output.ts

@@ -0,0 +1,7 @@
+export interface LinkedData {
+	"@type": string;
+	"schema.org": string;
+	"2fa": boolean;
+	$ref: string;
+}
+

core/src/language/typescript.rs

@@ -453,7 +453,12 @@ impl TypeScript {
 }
 
 fn typescript_property_aware_rename(name: &str) -> String {
-    if name.chars().any(|c| c == '-') {
+    let mut chars = name.chars();
+    let is_identifier = chars
+        .next()
+        .is_some_and(|c| c.is_alphabetic() || c == '_' || c == '$')
+        && chars.all(|c| c.is_alphanumeric() || c == '_' || c == '$');
+    if !is_identifier {
         return format!("{name:?}");
     }
     name.to_string()

core/tests/snapshot_tests.rs

@@ -659,6 +659,7 @@ tests! {
     can_handle_serde_rename_on_top_level: [swift { prefix: "OP".to_string(), }, kotlin, scala,  typescript, go, python];
     can_generate_unit_structs: [swift, kotlin, scala, typescript, go, python];
     kebab_case_rename: [swift, kotlin, scala,  typescript, go, python];
+    can_quote_non_identifier_field_names: [typescript];
 
     /// Globals get topologically sorted
     orders_types: [swift, kotlin, go, python];