Expand description
Announced copies of std/core traits, so they can be passed to proc macros.
announce_std::iter::Iterator! { [announce_std::iter::Iterator!, cb!] } passes
a copy of Iterator to cb!. META holds mock(::core::iter::Iterator):
implement that real trait, not the copy. In the type namespace,
announce_std::iter::Iterator is the real trait, so it works in bounds too.
macro_rules! show {
([$($l:tt)*] $($p:ident)? $(:: $s:ident)* ! => [mock($($m:tt)*)] { $($item:tt)* }) => {
const MOCKED: &str = stringify!($($m)*);
};
}
announce_std::iter::Iterator! { [announce_std::iter::Iterator!, show!] }
assert_eq!(MOCKED, ":: core :: iter :: Iterator");
// The type namespace holds the real trait:
fn _f(_: &dyn announce_std::iter::Iterator<Item = u8>) {}Old compilers. Debug, Hash, PartialEq, Eq, PartialOrd, Ord,
Clone, Copy and Default are also derive macro names. Before rustc 1.94,
their type-namespace item is a blanket subtrait instead of the real trait. It
works in bounds, but impl announce_std::fmt::Debug for X does not implement
the real Debug. Write impls against the real path from mock(..).
Not mocked. BuildHasher::hash_one is stable only since Rust 1.71, and
announce-std supports older compilers (MSRV 1.57), so a consumer that forwards
it would break there. The BuildHasher mock has build_hasher only. To hash a
value, use Hash::hash: x.hash(&mut b.build_hasher()), then finish() on
the hasher.
Version gates. Mocks of traits newer than the MSRV (1.57), or changed after
it, are gated with #[cfg(announce_std_rust_1_N)]. build.rs sets that cfg on
rustc 1.N and later, using rustversion attributes (Termination 1.61,
IntoFuture 1.64, and the 1.80, 1.81 and 1.94 variants).
Modules§
- alloc
- announce mocks of
alloctraits. Generated from newer-type-std’s copies. - any
- announce mocks of
anytraits (hand-written). - borrow
- announce mocks of
borrowtraits. Generated from newer-type-std’s copies. - clone
- announce mocks of
clonetraits (hand-written). - cmp
- announce mocks of
cmptraits. Generated from newer-type-std’s copies. - convert
- announce mocks of
converttraits. Generated from newer-type-std’s copies. - default
- announce mocks of
defaulttraits (hand-written). - error
- announce mocks of
errortraits. Generated from newer-type-std’s copies. - fmt
- announce mocks of
fmttraits. Generated from newer-type-std’s copies. - future
- announce mocks of
futuretraits. Generated from newer-type-std’s copies. - hash
- announce mocks of
hashtraits. Generated from newer-type-std’s copies. - io
- announce mocks of
iotraits. Generated from newer-type-std’s copies. - iter
- announce mocks of
itertraits. Generated from newer-type-std’s copies. - marker
- announce mocks of
markertraits (hand-written). - net
- announce mocks of
nettraits. Generated from newer-type-std’s copies. - ops
- announce mocks of
opstraits. Generated from newer-type-std’s copies. - process
- announce mocks of
processtraits. Generated from newer-type-std’s copies. - string
- announce mocks of
stringtraits. Generated from newer-type-std’s copies. - task
- announce mocks of
tasktraits. Generated from newer-type-std’s copies.