34 lines
1.0 KiB
Rust
34 lines
1.0 KiB
Rust
// Copyright 2013-2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(rustc_macro)]
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extern crate num;
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#[macro_use]
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extern crate num_macros;
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#[derive(Debug, PartialEq, FromPrimitive)]
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enum Color {
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Red,
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Blue,
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Green,
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}
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#[test]
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fn test_from_primitive_for_trivial_case() {
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let v: [Option<Color>; 4] = [num::FromPrimitive::from_u64(0),
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num::FromPrimitive::from_u64(1),
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num::FromPrimitive::from_u64(2),
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num::FromPrimitive::from_u64(3)];
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assert_eq!(v,
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[Some(Color::Red), Some(Color::Blue), Some(Color::Green), None]);
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}
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