mirror of https://github.com/rust-lang/rust
36 lines
905 B
Rust
36 lines
905 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_attribute]
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pub fn foo(attr: TokenStream, f: TokenStream) -> TokenStream {
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let mut tokens = f.into_iter();
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assert_eq!(tokens.next().unwrap().to_string(), "#");
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let next_attr = match tokens.next().unwrap() {
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TokenTree::Group(g) => g,
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_ => panic!(),
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};
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let fn_tok = tokens.next().unwrap();
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let ident_tok = tokens.next().unwrap();
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let args_tok = tokens.next().unwrap();
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let body = tokens.next().unwrap();
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let new_body = attr.into_iter()
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.chain(next_attr.stream().into_iter().skip(1));
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let tokens = vec![
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fn_tok,
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ident_tok,
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args_tok,
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Group::new(Delimiter::Brace, new_body.collect()).into(),
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].into_iter().collect::<TokenStream>();
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println!("{}", tokens);
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return tokens
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}
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