serde_keyvalue_derive/
lib.rs

1// Copyright 2022 The ChromiumOS Authors
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5use quote::quote;
6use syn::parse_macro_input;
7use syn::DeriveInput;
8
9/// Implement `argh`'s `FromArgValue` trait for a struct or enum using `from_key_values`.
10#[proc_macro_derive(FromKeyValues)]
11pub fn keyvalues_derive(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
12    let DeriveInput {
13        ident, generics, ..
14    } = parse_macro_input!(input);
15    let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
16
17    quote! {
18        impl #impl_generics ::serde_keyvalue::argh::FromArgValue for #ident #ty_generics #where_clause {
19            fn from_arg_value(value: &str) -> std::result::Result<Self, std::string::String> {
20                ::serde_keyvalue::from_key_values(value).map_err(|e| e.to_string())
21            }
22        }
23    }
24    .into()
25}
serde_keyvalue_derive/lib.rs

serde_keyvalue_derive/
lib.rs
