26 lines
508 B
Rust
26 lines
508 B
Rust
#![feature(proc_macro)]
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extern crate proc_macro;
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#[macro_use]
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extern crate quote;
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extern crate syn;
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use proc_macro::TokenStream;
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#[proc_macro]
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pub fn print_a_thing(_input: TokenStream) -> TokenStream {
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"println!(\"Invoked from a proc macro\");".parse().unwrap()
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}
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#[proc_macro_derive(ProgrammingLanguageInterface)]
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pub fn derive_programming_language_interface(input: TokenStream) -> TokenStream {
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input
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}
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#[cfg(test)]
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mod tests {
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#[test]
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fn it_works() {
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assert_eq!(2 + 2, 4);
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}
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}
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