Macro bitcoin_internals::impl_from_infallible

macro_rules! impl_from_infallible {
    ( $name:ident $(< $( $lt:tt $( : $clt:tt $(+ $dlt:tt )* )? ),+ >)? ) => { ... };
}

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.