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#![recursion_limit = "256"]

extern crate proc_macro;
extern crate proc_macro2;
extern crate syn;

#[macro_use]
extern crate quote;

use proc_macro::TokenStream;
use proc_macro2::{Ident, Span};
use syn::{parse_macro_input, DeriveInput};

mod matrix;

#[proc_macro_derive(Matrix)]
pub fn matrix(input: TokenStream) -> TokenStream {
    let string_input = input.to_string();

    let (datatype, height, width) = matrix::extract(matrix::search("data:", &string_input));
    let datatype = Ident::new(datatype, Span::call_site());

    let input = parse_macro_input!(input as DeriveInput);

    let name = &input.ident;

    let expanded = matrix::generate_tokens(name, &datatype, width, height);

    expanded.into()
}