mirror of https://github.com/rust-lang/rust.git
48 lines
1.1 KiB
Rust
48 lines
1.1 KiB
Rust
//@ force-host
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//@ no-prefer-dynamic
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//@ compile-flags: --crate-type proc-macro
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#![crate_type="proc-macro"]
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#![crate_name="some_macros"]
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extern crate proc_macro;
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use proc_macro::TokenStream;
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macro_rules! make_attr_macro {
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($name:ident) => {
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/// Generated doc comment
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#[proc_macro_attribute]
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pub fn $name(args: TokenStream, input: TokenStream) -> TokenStream {
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panic!()
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}
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}
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}
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make_attr_macro!(first_attr);
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make_attr_macro!(second_attr);
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/// a proc-macro that swallows its input and does nothing.
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#[proc_macro]
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pub fn some_proc_macro(_input: TokenStream) -> TokenStream {
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TokenStream::new()
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}
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/// a proc-macro attribute that passes its item through verbatim.
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#[proc_macro_attribute]
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pub fn some_proc_attr(_attr: TokenStream, item: TokenStream) -> TokenStream {
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item
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}
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/// a derive attribute that adds nothing to its input.
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#[proc_macro_derive(SomeDerive)]
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pub fn some_derive(_item: TokenStream) -> TokenStream {
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TokenStream::new()
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}
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/// Doc comment from the original crate
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#[proc_macro]
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pub fn reexported_macro(_input: TokenStream) -> TokenStream {
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TokenStream::new()
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}
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