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Simplify documentation for Extend impl for tuples

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This commit is contained in:
Sebastian Hahn 2024-10-26 18:58:05 +02:00
parent 59be878506
commit be0650272d
1 changed files with 6 additions and 14 deletions
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20
library/core/src/iter/traits/collect.rs
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@ -494,25 +494,17 @@ impl Extend<()> for () {
macro_rules! spec_tuple_impl {
( ($ty_name:ident, $var_name:ident, $extend_ty_name: ident, $trait_name:ident, $default_fn_name:ident, $cnt:tt), ) => {
spec_tuple_impl!($trait_name, $default_fn_name, #[stable(feature = "extend_for_more_tuples", since = "CURRENT_RUSTC_VERSION")] #[doc(fake_variadic)] #[doc = "This trait is implemented for tuples up to twelve items long."] => ($ty_name, $var_name, $extend_ty_name, $cnt),);
};
// Special case (A, B) as this was stabilized earlier
( ($ty_name:ident, $var_name:ident, $extend_ty_name: ident, $trait_name:ident, $default_fn_name:ident, $cnt:tt),
($ty_names:ident, $var_names:ident, $extend_ty_names: ident, $trait_names:ident, $default_fn_names:ident, $cnts:tt),) => {
spec_tuple_impl!(($ty_names, $var_names, $extend_ty_names, $trait_names, $default_fn_names, $cnts),);
spec_tuple_impl!($trait_name, $default_fn_name, #[stable(feature = "extend_for_tuple", since = "1.56.0")] => ($ty_name, $var_name, $extend_ty_name, $cnt), ($ty_names, $var_names, $extend_ty_names, $cnts),);
spec_tuple_impl!($trait_name, $default_fn_name, #[doc(fake_variadic)] #[doc = "This trait is implemented for tuples up to twelve items long. The `impl`s for 1- and 3- through 12-ary tuples were stabilized after 2-tuples, in RUSTC_CURRENT_VERSION."] => ($ty_name, $var_name, $extend_ty_name, $cnt),);
};
( ($ty_name:ident, $var_name:ident, $extend_ty_name: ident, $trait_name:ident, $default_fn_name:ident, $cnt:tt), $(($ty_names:ident, $var_names:ident, $extend_ty_names:ident, $trait_names:ident, $default_fn_names:ident, $cnts:tt),)*) => {
spec_tuple_impl!($(($ty_names, $var_names, $extend_ty_names, $trait_names, $default_fn_names, $cnts),)*);
spec_tuple_impl!($trait_name, $default_fn_name, #[stable(feature = "extend_for_more_tuples", since = "CURRENT_RUSTC_VERSION")] #[doc(hidden)] => ($ty_name, $var_name, $extend_ty_name, $cnt), $(($ty_names, $var_names, $extend_ty_names, $cnts),)*);
spec_tuple_impl!($trait_name, $default_fn_name, #[doc(hidden)] => ($ty_name, $var_name, $extend_ty_name, $cnt), $(($ty_names, $var_names, $extend_ty_names, $cnts),)*);
};
($trait_name:ident, $default_fn_name:ident, #[$stable:meta] $(#[$meta:meta] $(#[$doctext:meta])?)? => $(($ty_names:ident, $var_names:ident, $extend_ty_names:ident, $cnts:tt),)*) => {
$(#[$meta]
$(#[$doctext])?
)?
#[$stable]
($trait_name:ident, $default_fn_name:ident, #[$meta:meta] $(#[$doctext:meta])? => $(($ty_names:ident, $var_names:ident, $extend_ty_names:ident, $cnts:tt),)*) => {
#[$meta]
$(#[$doctext])?
#[stable(feature = "extend_for_tuple", since = "1.56.0")]
impl<$($ty_names,)* $($extend_ty_names,)*> Extend<($($ty_names,)*)> for ($($extend_ty_names,)*)
where
$($extend_ty_names: Extend<$ty_names>,)*