76 lines
1.7 KiB
Rust
76 lines
1.7 KiB
Rust
#![allow(dead_code)]
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#![deny(unused_variables)] // We used to generate warning: unused variable: `f`
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#[cfg(feature = "use_core")]
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extern crate core;
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#[macro_use]
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extern crate derivative;
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use std::fmt;
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#[derive(Derivative)]
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#[derivative(Debug)]
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enum A {}
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#[derive(Derivative)]
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#[derivative(Debug)]
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enum B { V1, V2, V3 }
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#[derive(Derivative)]
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#[derivative(Debug)]
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enum C { V1(isize), V2(B), V3(String) }
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#[derive(Derivative)]
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#[derivative(Debug)]
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enum D { V1{ a: isize } }
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct E;
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct F(isize);
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct G(isize, isize);
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct H { a: isize }
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct I { a: isize, b: isize }
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct J(Custom);
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struct Custom;
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impl fmt::Debug for Custom {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "yay")
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}
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}
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trait ToDebug {
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fn to_show(&self) -> String;
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}
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impl<T: fmt::Debug> ToDebug for T {
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fn to_show(&self) -> String {
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format!("{:?}", self)
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}
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}
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#[test]
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fn main() {
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assert_eq!(B::V1.to_show(), "V1".to_string());
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assert_eq!(B::V2.to_show(), "V2".to_string());
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assert_eq!(C::V1(3).to_show(), "V1(3)".to_string());
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assert_eq!(C::V2(B::V2).to_show(), "V2(V2)".to_string());
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assert_eq!(D::V1{ a: 2 }.to_show(), "V1 { a: 2 }".to_string());
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assert_eq!(E.to_show(), "E".to_string());
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assert_eq!(F(3).to_show(), "F(3)".to_string());
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assert_eq!(G(3, 4).to_show(), "G(3, 4)".to_string());
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assert_eq!(I{ a: 2, b: 4 }.to_show(), "I { a: 2, b: 4 }".to_string());
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assert_eq!(J(Custom).to_show(), "J(yay)".to_string());
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}
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