94 lines
2.1 KiB
Rust
94 lines
2.1 KiB
Rust
#![allow(dead_code)]
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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::marker::PhantomData;
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct Foo<T, U> {
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foo: T,
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#[derivative(Debug="ignore")]
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bar: U,
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}
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct Bar<T, U> (
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T,
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#[derivative(Debug="ignore")]
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U,
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);
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#[derive(Derivative)]
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#[derivative(Debug)]
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enum C<T, U> {
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V1(T),
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V2(#[derivative(Debug="ignore")] U),
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V3(String),
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}
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#[derive(Derivative)]
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#[derivative(Debug)]
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enum D<U> {
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V1 {
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#[derivative(Debug="ignore")]
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a: U
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}
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}
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct F<U>(#[derivative(Debug="ignore")] U);
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct G<U>(isize, #[derivative(Debug="ignore")] U);
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct J<U>(#[derivative(Debug="ignore")] U);
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struct NoDebug;
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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: std::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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#[derive(Derivative)]
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#[derivative(Debug)]
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struct PhantomField<T> {
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foo: PhantomData<T>,
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}
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#[derive(Derivative)]
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#[derivative(Debug)]
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struct PhantomTuple<T> {
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foo: PhantomData<(T,)>,
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}
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#[test]
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fn main() {
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assert_eq!(Foo { foo: 42, bar: NoDebug }.to_show(), "Foo { foo: 42 }".to_string());
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assert_eq!(Bar(42, NoDebug).to_show(), "Bar(42)".to_string());
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assert_eq!(C::V1::<i32, NoDebug>(12).to_show(), "V1(12)".to_string());
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assert_eq!(C::V2::<i32, NoDebug>(NoDebug).to_show(), "V2".to_string());
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assert_eq!(C::V3::<i32, NoDebug>("foo".to_string()).to_show(), "V3(\"foo\")".to_string());
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assert_eq!(D::V1 { a: NoDebug }.to_show(), "V1".to_string());
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assert_eq!(F(NoDebug).to_show(), "F".to_string());
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assert_eq!(G(42, NoDebug).to_show(), "G(42)".to_string());
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assert_eq!(J(NoDebug).to_show(), "J".to_string());
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assert_eq!(&format!("{:?}", PhantomField::<NoDebug> { foo: Default::default() }), "PhantomField { foo: PhantomData }");
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assert_eq!(&format!("{:?}", PhantomTuple::<NoDebug> { foo: Default::default() }), "PhantomTuple { foo: PhantomData }");
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}
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