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jakerr/example_procedural_macro.rs

Created August 19, 2020 13:57
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example_procedural_macro.rs
extern crate proc_macro;
use proc_macro::TokenStream;
#[proc_macro_attribute]
pub fn if_mac_or_win_cfg(_attr: TokenStream, item: TokenStream) -> TokenStream {
let mut stream = "#[cfg(any(target_os = \"macosx\", target_os = \"windows\"))]".parse::<TokenStream>().unwrap();
stream.extend(item);
stream
}
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