1 files changed, 54 insertions, 0 deletions
diff --git a/derive-macro/src/derives.rs b/derive-macro/src/derives.rs
new file mode 100644
index 00000000..fdb83a0d
--- /dev/null
+++ b/derive-macro/src/derives.rs
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2023 Robin Jarry
+
+use proc_macro2::TokenStream;
+use proc_macro_error::abort_call_site;
+use quote::quote;
+use syn::{self, Data, DataStruct, DeriveInput, Field, Fields, Generics, Ident};
+
+use crate::dummies;
+use crate::item::Item;
+
+pub fn derive_ini(input: &DeriveInput) -> TokenStream {
+    let ident = &input.ident;
+
+    match input.data {
+        Data::Struct(DataStruct {
+            fields: Fields::Named(ref fields),
+            ..
+        }) => {
+            dummies::ini(ident);
+
+            let item = Item::from_args_struct(input);
+            let fields = fields
+                .named
+                .iter()
+                .map(|field| {
+                    let item = Item::from_args_field(field);
+                    (field, item)
+                })
+                .collect::<Vec<_>>();
+            gen_for_struct(&item, ident, &input.generics, &fields)
+        }
+        _ => abort_call_site!("`#[derive(Ini)]` only supports non-tuple structs"),
+    }
+}
+
+fn gen_for_struct(
+    item: &Item,
+    name: &Ident,
+    generics: &Generics,
+    fields: &[(&Field, Item)],
+) -> TokenStream {
+    let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
+
+    let into_app = into_app::gen_for_struct(item, name, generics);
+    let args = args::gen_for_struct(item, name, generics, fields);
+
+    quote! {
+        impl #impl_generics clap::Parser for #name #ty_generics #where_clause {}
+
+        #into_app
+        #args
+    }
+}