[config-derive] fix bug where multiple merge(strategy) fail with un…

…parseable tokens

It was me, I forgot to add a semicolon when expanding a single field assignment. :face_palm:

crates/config-derive/src/expand.rs

@@ -79,7 +79,7 @@ fn gen_struct_field_assignment(field: &Field) -> Option<TokenStream> {
 
     let name = field.ident.as_ref().expect("expected identifier");
     Some(match first.strategy {
-        Some(path) => quote_spanned!(path.span()=> #path(&mut self.#name, other.#name)),
-        None => quote_spanned!(field.span()=> ::noelware_config::merge::Merge::merge(&mut self.#name, other.#name)),
+        Some(path) => quote_spanned!(path.span()=> #path(&mut self.#name, other.#name);),
+        None => quote_spanned!(field.span()=> ::noelware_config::merge::Merge::merge(&mut self.#name, other.#name);),
     })
 }

crates/config-derive/tests/ui.rs

@@ -25,6 +25,7 @@ fn ui() {
     cases.compile_fail("./tests/ui/union.rs");
     cases.compile_fail("./tests/ui/enum.rs");
 
+    cases.pass("./tests/ui/strategy_multi.rs");
     cases.pass("./tests/ui/custom_strategy.rs");
     cases.pass("./tests/ui/skip_test.rs");
     cases.pass("./tests/ui/struct.rs");

crates/config-derive/tests/ui/strategy_multi.rs

@@ -0,0 +1,47 @@
+// 🐻‍❄️🪚 core-rs: Collection of Rust crates that are used by and built for Noelware's projects
+// Copyright (c) 2024 Noelware, LLC. <[email protected]>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+use noelware_config::merge::Merge;
+
+#[derive(Debug, noelware_config_derive::Merge)]
+struct Something {
+    #[merge(strategy = noelware_config::merge::strategy::strings::append)]
+    a: String,
+
+    #[merge(strategy = noelware_config::merge::strategy::strings::overwrite_empty)]
+    b: String,
+}
+
+fn main() {
+    let mut a = Something {
+        a: String::from("weow"),
+        b: String::new(),
+    };
+
+    let b = Something {
+        a: String::from("heck"),
+        b: String::from("weow"),
+    };
+
+    a.merge(b);
+    assert_eq!(a.a, "weowheck");
+    assert_eq!(a.b, "weow");
+}