dyn_dyn_macros/
lib.rs

1//! This crate provides procedural macros meant to be used with the `dyn-dyn` crate. This crate should not be depended upon directly:
2//! instead, the versions of these macros re-exported from the `dyn-dyn` crate itself should be used.
3
4#![forbid(unsafe_code)] // We generate unsafe code, but don't want to accidentally use unsafe code at compile-time
5#![allow(clippy::needless_borrowed_reference)]
6#![feature(proc_macro_diagnostic)]
7#![feature(proc_macro_span)]
8
9extern crate proc_macro;
10
11use crate::cast::DynDynCastInput;
12use syn::parse::{Parse, ParseStream};
13use syn::punctuated::Punctuated;
14use syn::{parse_macro_input, ItemImpl, ItemTrait, Token, Type};
15
16mod base;
17mod cast;
18mod impl_block;
19
20#[proc_macro]
21pub fn dyn_dyn_cast(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
22    cast::dyn_dyn_cast(parse_macro_input!(input as DynDynCastInput)).into()
23}
24
25#[proc_macro_attribute]
26pub fn dyn_dyn_base(
27    args: proc_macro::TokenStream,
28    input: proc_macro::TokenStream,
29) -> proc_macro::TokenStream {
30    base::dyn_dyn_base(args.into(), parse_macro_input!(input as ItemTrait)).into()
31}
32
33struct DerivedTypes(Punctuated<Type, Token![,]>);
34
35impl Parse for DerivedTypes {
36    fn parse(input: ParseStream) -> syn::Result<Self> {
37        Ok(DerivedTypes(Punctuated::parse_terminated(input)?))
38    }
39}
40
41#[proc_macro_attribute]
42pub fn dyn_dyn_impl(
43    args: proc_macro::TokenStream,
44    input: proc_macro::TokenStream,
45) -> proc_macro::TokenStream {
46    impl_block::dyn_dyn_impl(
47        parse_macro_input!(args as DerivedTypes).0,
48        parse_macro_input!(input as ItemImpl),
49    )
50    .into()
51}
dyn_dyn_macros/lib.rs

dyn_dyn_macros/
lib.rs
