mirror of https://github.com/rust-lang/rust
31 lines
652 B
Rust
31 lines
652 B
Rust
//@ force-host
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//@ no-prefer-dynamic
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#![crate_type = "proc-macro"]
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extern crate proc_macro;
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use proc_macro::*;
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#[proc_macro]
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pub fn tokens(input: TokenStream) -> TokenStream {
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assert_nothing_joint(input);
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TokenStream::new()
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}
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#[proc_macro_attribute]
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pub fn nothing(_: TokenStream, input: TokenStream) -> TokenStream {
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assert_nothing_joint(input);
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TokenStream::new()
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}
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fn assert_nothing_joint(s: TokenStream) {
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for tt in s {
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match tt {
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TokenTree::Group(g) => assert_nothing_joint(g.stream()),
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TokenTree::Punct(p) => assert_eq!(p.spacing(), Spacing::Alone),
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_ => {}
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}
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}
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}
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