1 files changed, 27 insertions, 0 deletions
diff --git a/alacritty_config_derive/src/lib.rs b/alacritty_config_derive/src/lib.rs
new file mode 100644
index 00000000..8601d5cb
--- /dev/null
+++ b/alacritty_config_derive/src/lib.rs
@@ -0,0 +1,27 @@
+use proc_macro::TokenStream;
+use syn::{parse_macro_input, Data, DataStruct, DeriveInput, Error, Fields, Path};
+
+mod de_enum;
+mod de_struct;
+
+/// Error if the derive was used on an unsupported type.
+const UNSUPPORTED_ERROR: &str = "ConfigDeserialize must be used on a struct with fields";
+
+#[proc_macro_derive(ConfigDeserialize, attributes(config))]
+pub fn derive_config_deserialize(input: TokenStream) -> TokenStream {
+    let input = parse_macro_input!(input as DeriveInput);
+
+    match input.data {
+        Data::Struct(DataStruct { fields: Fields::Named(fields), .. }) => {
+            de_struct::derive_deserialize(input.ident, input.generics, fields.named)
+        },
+        Data::Enum(data_enum) => de_enum::derive_deserialize(input.ident, data_enum),
+        _ => Error::new(input.ident.span(), UNSUPPORTED_ERROR).to_compile_error().into(),
+    }
+}
+
+/// Verify that a token path ends with a specific segment.
+pub(crate) fn path_ends_with(path: &Path, segment: &str) -> bool {
+    let segments = path.segments.iter();
+    segments.last().map_or(false, |s| s.ident == segment)
+}