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Add a note for unsatisfied ~const Drop bounds

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This commit is contained in:
Deadbeef
2022-04-10 17:36:08 +10:00
parent e745b4ddbd
commit 7f54d68f26
3 changed files with 33 additions and 17 deletions
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31
src/test/rustdoc/rfc-2632-const-trait-impl.rs
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@@ -1,5 +1,5 @@
// Test that we do not currently display `~const` in rustdoc
// as that syntax is currently provisional; `~const Drop` has
// as that syntax is currently provisional; `~const Destruct` has
// no effect on stable code so it should be hidden as well.
//
// To future blessers: make sure that `const_trait_impl` is
@@ -8,6 +8,8 @@
#![feature(const_trait_impl)]
#![crate_name = "foo"]
use std::marker::Destruct;
pub struct S<T>(T);
// @!has foo/trait.Tr.html '//pre[@class="rust trait"]/code/a[@class="trait"]' '~const'
@@ -20,22 +22,36 @@ pub trait Tr<T> {
// @!has - '//div[@id="method.a"]/h4[@class="code-header"]/span[@class="where"]' '~const'
// @has - '//div[@id="method.a"]/h4[@class="code-header"]/span[@class="where fmt-newline"]' ': Clone'
#[default_method_body_is_const]
fn a<A: ~const Clone>() where Option<A>: ~const Clone {}
fn a<A: ~const Clone + ~const Destruct>()
where
Option<A>: ~const Clone + ~const Destruct,
{
}
}
// @!has - '//section[@id="impl-Tr%3CT%3E"]/h3[@class="code-header in-band"]' '~const'
// @has - '//section[@id="impl-Tr%3CT%3E"]/h3[@class="code-header in-band"]/a[@class="trait"]' 'Clone'
// @!has - '//section[@id="impl-Tr%3CT%3E"]/h3[@class="code-header in-band"]/span[@class="where"]' '~const'
// @has - '//section[@id="impl-Tr%3CT%3E"]/h3[@class="code-header in-band"]/span[@class="where fmt-newline"]' ': Clone'
impl<T: ~const Clone> const Tr<T> for T where Option<T>: ~const Clone {
fn a<A: ~const Clone>() where Option<A>: ~const Clone {}
impl<T: ~const Clone + ~const Destruct> const Tr<T> for T
where
Option<T>: ~const Clone + ~const Destruct,
{
fn a<A: ~const Clone + ~const Destruct>()
where
Option<A>: ~const Clone + ~const Destruct,
{
}
}
// @!has foo/fn.foo.html '//pre[@class="rust fn"]/code/a[@class="trait"]' '~const'
// @has - '//pre[@class="rust fn"]/code/a[@class="trait"]' 'Clone'
// @!has - '//pre[@class="rust fn"]/code/span[@class="where fmt-newline"]' '~const'
// @has - '//pre[@class="rust fn"]/code/span[@class="where fmt-newline"]' ': Clone'
pub const fn foo<F: ~const Clone>() where Option<F>: ~const Clone {
pub const fn foo<F: ~const Clone + ~const Destruct>()
where
Option<F>: ~const Clone + ~const Destruct,
{
F::a()
}
@@ -44,7 +60,10 @@ impl<T> S<T> {
// @has - '//section[@id="method.foo"]/h4[@class="code-header"]/a[@class="trait"]' 'Clone'
// @!has - '//section[@id="method.foo"]/h4[@class="code-header"]/span[@class="where"]' '~const'
// @has - '//section[@id="method.foo"]/h4[@class="code-header"]/span[@class="where fmt-newline"]' ': Clone'
pub const fn foo<B: ~const Clone>() where B: ~const Clone {
pub const fn foo<B: ~const Clone + ~const Destruct>()
where
B: ~const Clone + ~const Destruct,
{
B::a()
}
}