termcolor_output_impl 1.0.0

Implementation crate for colored! macro.
Documentation 
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//! Procedural macro crate for [termcolor_output].
//!
//! Please do not depend on this crate directly.
//!
//! [termcolor_output]: http://docs.rs/termcolor_output

extern crate proc_macro;

use proc_macro::TokenStream;

mod codegen;
mod parse;
mod types;

use codegen::*;
use parse::*;
use types::*;

#[proc_macro_derive(ColoredOutput)]
pub fn colored_derive(input: TokenStream) -> TokenStream {
    let body = parse_input(input)
        .and_then(|input| {
            let MacroInput {
                writer,
                format,
                rest,
            } = input;

            Ok(guard(writer)
                .into_iter()
                .chain(spec_init().into_iter())
                .chain(
                    merge_items(format, rest)?
                        .into_iter()
                        .map(output)
                        .flat_map(TokenStream::into_iter),
                )
                .collect())
        })
        .unwrap_or_else(|err| compile_error(err));
    let out = macro_wrapper(closure_wrapper(body));
    out
}