Improve support for raw identifier field names

instant-xml-macros/src/case.rs

@@ -95,7 +95,11 @@ impl RenameRule {
 
     /// Apply a renaming rule to a struct field, returning the version expected in the source.
     pub fn apply_to_field(&self, ident: &Ident) -> String {
-        let field = ident.to_string();
+        let mut field = ident.to_string();
+        if field.starts_with("r#") {
+            field = field[2..].to_string();
+        }
+
         match *self {
             None | LowerCase | SnakeCase => field,
             UpperCase => field.to_ascii_uppercase(),

instant-xml/tests/de-nested.rs

@@ -13,7 +13,7 @@ struct NestedDe {
 #[xml(ns("URI", bar = "BAZ", foo = "BAR"))]
 struct StructWithCustomFieldFromXml {
     #[xml(ns(BAR))]
-    flag: bool,
+    r#flag: bool,
     #[xml(attribute)]
     flag_attribute: bool,
     test: NestedDe,