macro_rules! impl_from_infallible { ( $name:ident $(< $( $lt:tt $( : $clt:tt $(+ $dlt:tt )* )? ),+ >)? ) => { ... }; }
Expand description
Derives From<core::convert::Infallible>
for the given type.
Supports types with arbitrary combinations of lifetimes and type parameters.
Note: Paths are not supported (for ex. impl_from_infallible!(Hello<D: std::fmt::Display>).
§Examples
use bitcoin_internals::impl_from_infallible;
enum AlphaEnum { Item }
impl_from_infallible!(AlphaEnum);
enum BetaEnum<'b> { Item(&'b usize) }
impl_from_infallible!(BetaEnum<'b>);
enum GammaEnum<T> { Item(T) }
impl_from_infallible!(GammaEnum<T>);
enum DeltaEnum<'b, 'a: 'static + 'b, T: 'a, D: Debug + Display + 'a> {
Item((&'b usize, &'a usize, T, D))
}
impl_from_infallible!(DeltaEnum<'b, 'a: 'static + 'b, T: 'a, D: Debug + Display + 'a>);
struct AlphaStruct;
impl_from_infallible!(AlphaStruct);
struct BetaStruct<'b>(&'b usize);
impl_from_infallible!(BetaStruct<'b>);
struct GammaStruct<T>(T);
impl_from_infallible!(GammaStruct<T>);
struct DeltaStruct<'b, 'a: 'static + 'b, T: 'a, D: Debug + Display + 'a> {
hello: &'a T,
what: &'b D,
}
impl_from_infallible!(DeltaStruct<'b, 'a: 'static + 'b, T: 'a, D: Debug + Display + 'a>);
See https://stackoverflow.com/a/61189128 for more information about this macro.