93 lines
1.5 KiB
Rust
93 lines
1.5 KiB
Rust
#![feature(plugin, const_fn)]
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#![allow(dead_code)]
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#![warn(new_without_default, new_without_default_derive)]
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pub struct Foo;
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impl Foo {
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pub fn new() -> Foo { Foo }
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}
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pub struct Bar;
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impl Bar {
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pub fn new() -> Self { Bar }
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}
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pub struct Ok;
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impl Ok {
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pub fn new() -> Self { Ok }
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}
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impl Default for Ok {
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fn default() -> Self { Ok }
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}
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pub struct Params;
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impl Params {
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pub fn new(_: u32) -> Self { Params }
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}
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pub struct GenericsOk<T> {
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bar: T,
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}
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impl<U> Default for GenericsOk<U> {
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fn default() -> Self { unimplemented!(); }
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}
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impl<'c, V> GenericsOk<V> {
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pub fn new() -> GenericsOk<V> { unimplemented!() }
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}
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pub struct LtOk<'a> {
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foo: &'a bool,
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}
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impl<'b> Default for LtOk<'b> {
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fn default() -> Self { unimplemented!(); }
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}
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impl<'c> LtOk<'c> {
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pub fn new() -> LtOk<'c> { unimplemented!() }
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}
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pub struct LtKo<'a> {
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foo: &'a bool,
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}
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impl<'c> LtKo<'c> {
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pub fn new() -> LtKo<'c> { unimplemented!() }
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// FIXME: that suggestion is missing lifetimes
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}
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struct Private;
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impl Private {
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fn new() -> Private { unimplemented!() } // We don't lint private items
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}
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struct Const;
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impl Const {
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pub const fn new() -> Const { Const } // const fns can't be implemented via Default
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}
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pub struct IgnoreGenericNew;
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impl IgnoreGenericNew {
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pub fn new<T>() -> Self { IgnoreGenericNew } // the derived Default does not make sense here as the result depends on T
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}
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pub trait TraitWithNew: Sized {
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fn new() -> Self {
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panic!()
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}
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}
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fn main() {}
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