1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
extern crate proc_macro; #[macro_use] extern crate quote; #[macro_use] extern crate syn; extern crate darling_core; use proc_macro::TokenStream; use darling_core::{codegen, options}; #[proc_macro_derive(FromMeta, attributes(darling))] pub fn derive_from_meta(input: TokenStream) -> TokenStream { let ast = parse_macro_input!(input as syn::DeriveInput); let container = options::FromMetaOptions::new(&ast).unwrap(); let trait_impl = codegen::FromMetaImpl::from(&container); let result = quote!(#trait_impl); result.into() } #[proc_macro_derive(FromMetaItem, attributes(darling))] pub fn derive_from_meta_item(_input: TokenStream) -> TokenStream { panic!("darling::FromMetaItem has been replaced by darling::FromMeta"); } #[proc_macro_derive(FromDeriveInput, attributes(darling))] pub fn derive_from_input(input: TokenStream) -> TokenStream { let ast = parse_macro_input!(input as syn::DeriveInput); let container = options::FdiOptions::new(&ast).unwrap(); let trait_impl = codegen::FromDeriveInputImpl::from(&container); let result = quote!(#trait_impl); result.into() } #[proc_macro_derive(FromField, attributes(darling))] pub fn derive_field(input: TokenStream) -> TokenStream { let ast = parse_macro_input!(input as syn::DeriveInput); let fdic = options::FromFieldOptions::new(&ast).unwrap(); let trait_impl = codegen::FromFieldImpl::from(&fdic); let result = quote!(#trait_impl); result.into() } #[proc_macro_derive(FromTypeParam, attributes(darling))] pub fn derive_type_param(input: TokenStream) -> TokenStream { let ast = parse_macro_input!(input as syn::DeriveInput); let fdic = options::FromTypeParamOptions::new(&ast).unwrap(); let trait_impl = codegen::FromTypeParamImpl::from(&fdic); let result = quote!(#trait_impl); result.into() } #[proc_macro_derive(FromVariant, attributes(darling))] pub fn derive_variant(input: TokenStream) -> TokenStream { let ast = parse_macro_input!(input as syn::DeriveInput); let fdic = options::FromVariantOptions::new(&ast).unwrap(); let trait_impl = codegen::FromVariantImpl::from(&fdic); let result = quote!(#trait_impl); result.into() }