blastmud/ansi_macro/src/lib.rs

use ansi_markup::parse_ansi_markup;
use proc_macro::TokenStream;
use quote::ToTokens;
use syn::{parse_macro_input, Lit};

#[proc_macro]
pub fn ansi(input: TokenStream) -> TokenStream {
    let raw = match parse_macro_input!(input as Lit) {
        Lit::Str(lit_str) => lit_str.value(),
        _ => panic!("Expected a string literal"),
    };
    TokenStream::from(
        parse_ansi_markup(&raw)
            .unwrap_or_else(|e| panic!("Bad ansi literal: {}", e))
            .into_token_stream(),
    )
}