zerovec_derive/
lib.rs

1// This file is part of ICU4X. For terms of use, please see the file
2// called LICENSE at the top level of the ICU4X source tree
3// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
4
5//! Proc macros for generating `ULE`, `VarULE` impls and types for the `zerovec` crate
6
7use proc_macro::TokenStream;
8use syn::{parse_macro_input, DeriveInput, Ident};
9mod make_ule;
10mod make_varule;
11pub(crate) mod ule;
12mod utils;
13mod varule;
14
15/// Full docs for this proc macro can be found on the [`zerovec`](https://docs.rs/zerovec) crate.
16#[proc_macro_derive(ULE)]
17pub fn ule_derive(input: TokenStream) -> TokenStream {
18    let input = match ::syn::parse::<DeriveInput>(input) {
    ::syn::__private::Ok(data) => data,
    ::syn::__private::Err(err) => {
        return ::syn::__private::TokenStream::from(err.to_compile_error());
    }
}parse_macro_input!(input as DeriveInput);
19    TokenStream::from(ule::derive_impl(&input))
20}
21
22/// Full docs for this proc macro can be found on the [`zerovec`](https://docs.rs/zerovec) crate.
23#[proc_macro_derive(VarULE)]
24pub fn varule_derive(input: TokenStream) -> TokenStream {
25    let input = match ::syn::parse::<DeriveInput>(input) {
    ::syn::__private::Ok(data) => data,
    ::syn::__private::Err(err) => {
        return ::syn::__private::TokenStream::from(err.to_compile_error());
    }
}parse_macro_input!(input as DeriveInput);
26    TokenStream::from(varule::derive_impl(&input, None))
27}
28
29/// Full docs for this proc macro can be found on the [`zerovec`](https://docs.rs/zerovec) crate.
30#[proc_macro_attribute]
31pub fn make_ule(attr: TokenStream, item: TokenStream) -> TokenStream {
32    let input = match ::syn::parse::<DeriveInput>(item) {
    ::syn::__private::Ok(data) => data,
    ::syn::__private::Err(err) => {
        return ::syn::__private::TokenStream::from(err.to_compile_error());
    }
}parse_macro_input!(item as DeriveInput);
33    let attr = match ::syn::parse::<Ident>(attr) {
    ::syn::__private::Ok(data) => data,
    ::syn::__private::Err(err) => {
        return ::syn::__private::TokenStream::from(err.to_compile_error());
    }
}parse_macro_input!(attr as Ident);
34    TokenStream::from(make_ule::make_ule_impl(attr, input))
35}
36
37/// Full docs for this proc macro can be found on the [`zerovec`](https://docs.rs/zerovec) crate.
38#[proc_macro_attribute]
39pub fn make_varule(attr: TokenStream, item: TokenStream) -> TokenStream {
40    let input = match ::syn::parse::<DeriveInput>(item) {
    ::syn::__private::Ok(data) => data,
    ::syn::__private::Err(err) => {
        return ::syn::__private::TokenStream::from(err.to_compile_error());
    }
}parse_macro_input!(item as DeriveInput);
41    let attr = match ::syn::parse::<Ident>(attr) {
    ::syn::__private::Ok(data) => data,
    ::syn::__private::Err(err) => {
        return ::syn::__private::TokenStream::from(err.to_compile_error());
    }
}parse_macro_input!(attr as Ident);
42    TokenStream::from(make_varule::make_varule_impl(attr, input))
43}