This crate provides the #[mono]
macro to force a generic function to be monomorphizied with given types.
Pair with share-generics
mode in rustc, this can result less code, for details see rust-lang/rust#48779.
[dependencies]
mono-macro = "0.1"
Since we are monomorphizing ourselves, you are required to spell out the static dispatch manually:
In a bare function case,
#[mono(T = i32, U = i64)]
fn func<T, U>(t: T, u: U) {
...
}
it will be expanded to:
pub const _: *const () = (&foo::<i32, i64>) as *const _ as _;
fn func<T, U>(t: T, u: U) {
...
}
For more complicated case, use mono_macro!
instead:
trait Tr<T> {
fn foo(&self, _t: T) {}
}
struct Foo<'a> {
t: &'a str,
}
impl<'a, T> Tr<T> for Foo<'a> {
fn foo(&self, _t: T) {}
}
mono_macro!(<Foo<'static> as Tr<i32>>::foo);
this will expand to:
trait Tr<T> {
fn foo(&self, _t: T) {}
}
struct Foo<'a> {
t: &'a str,
}
impl<'a, T> Tr<T> for Foo<'a> {
fn foo(&self, _t: T) {}
}
pub const _: *const () = (&<Foo<'static> as Tr<i32>>::foo) as *const _ as _;
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this crate by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.