tlnat 0.1.2

type level non-negative integer constants for rust
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//! tlnat; type level (natural) numbers for rust
//!
//! This project is essentially a stop-gap until the
//! rust team implements generics that can be parameterized
//! by values. The infrastructure exists to define other
//! types of objects, but currently the only implemented values
//! are natural numbers 0-1024.
//!
//! test/lib.rs: some test code that requires being in a separate
//! file (for whatever reason, may be an ICE in rustc).
//!
//! author: Dalton Woodard
//! contact: daltonmwoodard@gmail.com
//! license: MIT License (c) 2016 by Dalton Woodard

extern crate tlnat;

// testing that these actually work;
// _0 - _10 is reasonable for checking,
// if these work then all the rest should.
#[test]
fn test_value_equality () -> ()
{
    assert_eq!(0, tlnat::_0::VALUE);
    assert_eq!(1, tlnat::_1::VALUE);
    assert_eq!(2, tlnat::_2::VALUE);
    assert_eq!(3, tlnat::_3::VALUE);
    assert_eq!(4, tlnat::_4::VALUE);
    assert_eq!(5, tlnat::_5::VALUE);
    assert_eq!(6, tlnat::_6::VALUE);
    assert_eq!(7, tlnat::_7::VALUE);
    assert_eq!(8, tlnat::_8::VALUE);
    assert_eq!(9, tlnat::_9::VALUE);
}

// testing that different types
// indeed have different values
#[test]
fn test_different_not_equal () -> ()
{
    assert!(0 != tlnat::_5::VALUE);
    assert!(1 != tlnat::_9::VALUE);
    assert!(2 != tlnat::_3::VALUE);
    assert!(3 != tlnat::_10::VALUE);
    assert!(4 != tlnat::_2::VALUE);
    assert!(5 != tlnat::_7::VALUE);
    assert!(6 != tlnat::_1::VALUE);
    assert!(7 != tlnat::_4::VALUE);
    assert!(8 != tlnat::_6::VALUE);
    assert!(9 != tlnat::_8::VALUE);
}

// WARNING: This currently does not compile, I think
// due to some internal evaluation order in rustc.
//
// test that this works with constant
// sized arrays;
/*
#[test]
fn test_constant_size_array () -> ()
{
    struct zero_arr  { vals: [u8; tlnat::_0::evaluate()] }
    struct one_arr   { vals: [u8; tlnat::_1::evaluate()] }
    struct two_arr   { vals: [u8; tlnat::_2::VALUE] }
    struct three_arr { vals: [u8; tlnat::_3::VALUE] }
    struct four_arr  { vals: [u8; tlnat::_4::VALUE] }
    struct five_arr  { vals: [u8; tlnat::_5::VALUE] }

    assert_eq!(0, std::mem::size_of::<zero_arr>());
    assert_eq!(1, std::mem::size_of::<one_arr>());
    assert_eq!(2, std::mem::size_of::<two_arr>());
    assert_eq!(3, std::mem::size_of::<three_arr>());
    assert_eq!(4, std::mem::size_of::<four_arr>());
    assert_eq!(5, std::mem::size_of::<five_arr>());
}
*/