diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/deserializer/mod.rs | 20 | ||||
| -rw-r--r-- | src/util.rs | 29 |
2 files changed, 31 insertions, 18 deletions
diff --git a/src/deserializer/mod.rs b/src/deserializer/mod.rs index 6a512dc..6d7d277 100644 --- a/src/deserializer/mod.rs +++ b/src/deserializer/mod.rs @@ -68,23 +68,11 @@ pub trait Deserializer fn skip_to_tag_end(&mut self, tag_name: &str) -> Result<(), Error<Infallible>>; } -macro_rules! maybe_static_doc { - () => { - "Bound to `'static` if the `deserializer-static-generics` feature is enabled." - }; -} - -#[cfg(any(not(feature = "deserializer-static-generics"), doc))] -trait_alias! { - #[doc = maybe_static_doc!()] - pub MaybeStatic; -} - -#[cfg(all(feature = "deserializer-static-generics", not(doc)))] -trait_alias! { - #[doc = maybe_static_doc!()] +trait_alias!( + bounds_when_feature = "deserializer-static-generics", + /// Bound to `'static` if the `deserializer-static-generics` feature is enabled. pub MaybeStatic: 'static; -} +); /// Whether or not to skip the end tag of a tagged element. /// diff --git a/src/util.rs b/src/util.rs index 5c9ffb8..d96c4f4 100644 --- a/src/util.rs +++ b/src/util.rs @@ -1,13 +1,38 @@ macro_rules! trait_alias { ( $(#[$attr: meta])* - $visibility: vis $name: ident$(<$($type_param: ident),*>)?$(: $first_bound: tt $(+ $bound: tt)*)?; + $visibility: vis $name: ident$(<$($type_param: ident),*>)? + $(: $first_bound: tt $(+ $bound: tt)*)?; ) => { $(#[$attr])* $visibility trait $name $(<$($type_param),*>)? $(: $first_bound $(+ $bound)*)? {} - impl<T: $($first_bound $(+ $bound)*)?, $($($type_param),*)?> $name$(<$($type_param),*>)? for T {} + impl< + T: $($first_bound $(+ $bound)*)?, + $($($type_param),*)? + > $name$(<$($type_param),*>)? for T {} }; + + // Rule where the trait bounds will only be applied if the specified feature is enabled + ( + bounds_when_feature = $bounds_feature: literal, + $(#[$attr: meta])* + $visibility: vis $name: ident$(<$($type_param: ident),*>)? + $(: $first_bound: tt $(+ $bound: tt)*)?; + ) => { + #[cfg(feature = $bounds_feature)] + trait_alias! { + $(#[$attr])* + $visibility $name$(<$($type_param),*>)? + $(: $first_bound $(+ $bound)*)?; + } + + #[cfg(not(feature = $bounds_feature))] + trait_alias! { + $(#[$attr])* + $visibility $name$(<$($type_param),*>)?; + } + } } macro_rules! feature_alternate { |