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//-
// Copyright 2017, 2018 The proptest developers
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Defines macros for product type creation, extraction, and the type signature
//! itself. This version uses tuples. This mechanism is used to be very
//! loosely coupled with `frunk_core` so that only `lib.rs` has to be changed
//! in the event that Rust gets tuple-variadic generics.
macro_rules! product_type {
($factor: ty) => {
($factor,)
};
($($factor: ty),*) => {
( $( $factor, )* )
};
($($factor: ty),*,) => {
( $( $factor, )* )
};
}
macro_rules! product_pack {
($factor: expr) => {
($factor,)
};
($($factor: expr),*) => {
( $( $factor ),* )
};
($($factor: expr),*,) => {
( $( $factor ),* )
};
}
macro_rules! product_unpack {
($factor: pat) => {
($factor,)
};
($($factor: pat),*) => {
( $( $factor ),* )
};
($($factor: pat),*,) => {
( $( $factor ),* )
};
}
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