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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

//! A collection of pipes used in 'signalo' umbrella crate.

#![warn(missing_docs)]
#![cfg_attr(all(not(test), not(feature = "std")), no_std)]

#[cfg(all(not(test), not(feature = "std")))]
extern crate core as std;

#[cfg(all(test, feature = "std"))]
extern crate std;

pub extern crate signalo_traits;

pub use signalo_traits as traits;

pub mod pipe;
pub mod unit_pipe;

/// Convenience macros for assembling filter pipes.
#[macro_use]
pub mod macros {
    #[allow(unused_macros)]
    macro_rules! pipe {
        ($($filters:expr),*) => ({
            #[allow(unused_imports)]
            use filter::{pipe::Pipe, unit_pipe::UnitPipe};
            pipe!(@internal $($filters),*)
        });
        (@internal $lhs:expr, $rhs:expr, $($tail:expr),*) => ({
            let lhs = pipe!(@internal $lhs, $rhs);
            let rhs = pipe!(@internal $($tail),*);
            Pipe::new(lhs, rhs)
        });
        (@internal $lhs:expr, $rhs:expr) => {
            Pipe::new($lhs, $rhs)
        };
        (@internal $filter:expr) => {
            UnitPipe::new($filter)
        };
    }
}