vendor/darling_macro/src/lib.rs

   1 extern crate proc_macro;
   2 #[macro_use]
   3 extern crate syn;
   4
   5 extern crate darling_core;
   6
   7 use proc_macro::TokenStream;
   8
   9 use darling_core::{derive, Error};
  10
  11 #[proc_macro_derive(FromMeta, attributes(darling))]
  12 pub fn derive_from_meta(input: TokenStream) -> TokenStream {
  13     derive::from_meta(&parse_macro_input!(input)).into()
  14 }
  15
  16 #[proc_macro_derive(FromMetaItem, attributes(darling))]
  17 pub fn derive_from_meta_item(_input: TokenStream) -> TokenStream {
  18     Error::custom("darling::FromMetaItem has been replaced by darling::FromMeta")
  19         .write_errors()
  20         .into()
  21 }
  22
  23 #[proc_macro_derive(FromDeriveInput, attributes(darling))]
  24 pub fn derive_from_input(input: TokenStream) -> TokenStream {
  25     derive::from_derive_input(&parse_macro_input!(input)).into()
  26 }
  27
  28 #[proc_macro_derive(FromField, attributes(darling))]
  29 pub fn derive_field(input: TokenStream) -> TokenStream {
  30     derive::from_field(&parse_macro_input!(input)).into()
  31 }
  32
  33 #[proc_macro_derive(FromTypeParam, attributes(darling))]
  34 pub fn derive_type_param(input: TokenStream) -> TokenStream {
  35     derive::from_type_param(&parse_macro_input!(input)).into()
  36 }
  37
  38 #[proc_macro_derive(FromVariant, attributes(darling))]
  39 pub fn derive_variant(input: TokenStream) -> TokenStream {
  40     derive::from_variant(&parse_macro_input!(input)).into()
  41 }