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Rollup merge of #85645 - scottmcm:demote-from-into-try, r=yaahc

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Demote `ControlFlow::{from|into}_try` to `pub(crate)`

They have mediocre names and non-obvious semantics, so personally I don't think they're worth trying to stabilize, and thus might as well just be internal (they're used for convenience in iterator adapters), not something shown in the rustdocs.

I don't think anyone actually wanted to use them outside `core` -- they just got made public-but-unstable along with the whole type in https://github.com/rust-lang/rust/pull/76204 that promoted `LoopState` from an internal type to the exposed `ControlFlow` type.

cc https://github.com/rust-lang/rust/issues/75744, the tracking issue they mention.
cc https://github.com/rust-lang/rust/pull/85608, the PR where I'm proposing stabilizing the type.
This commit is contained in:
Yuki Okushi 2021-05-26 13:31:02 +09:00 committed by GitHub
commit 587de8e5f9
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1 changed files with 7 additions and 8 deletions
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15
library/core/src/ops/control_flow.rs
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@ -187,9 +187,8 @@ pub fn map_break<T, F>(self, f: F) -> ControlFlow<T, C>
#[cfg(bootstrap)]
impl<R: ops::TryV1> ControlFlow<R, R::Output> {
/// Create a `ControlFlow` from any type implementing `Try`.
#[unstable(feature = "control_flow_enum", reason = "new API", issue = "75744")]
#[inline]
pub fn from_try(r: R) -> Self {
pub(crate) fn from_try(r: R) -> Self {
match R::into_result(r) {
Ok(v) => ControlFlow::Continue(v),
Err(v) => ControlFlow::Break(R::from_error(v)),
@ -197,9 +196,8 @@ pub fn from_try(r: R) -> Self {
}
/// Convert a `ControlFlow` into any type implementing `Try`;
#[unstable(feature = "control_flow_enum", reason = "new API", issue = "75744")]
#[inline]
pub fn into_try(self) -> R {
pub(crate) fn into_try(self) -> R {
match self {
ControlFlow::Continue(v) => R::from_ok(v),
ControlFlow::Break(v) => v,
@ -207,12 +205,14 @@ pub fn into_try(self) -> R {
}
}
/// These are used only as part of implementing the iterator adapters.
/// They have mediocre names and non-obvious semantics, so aren't
/// currently on a path to potential stabilization.
#[cfg(not(bootstrap))]
impl<R: ops::TryV2> ControlFlow<R, R::Output> {
/// Create a `ControlFlow` from any type implementing `Try`.
#[unstable(feature = "control_flow_enum", reason = "new API", issue = "75744")]
#[inline]
pub fn from_try(r: R) -> Self {
pub(crate) fn from_try(r: R) -> Self {
match R::branch(r) {
ControlFlow::Continue(v) => ControlFlow::Continue(v),
ControlFlow::Break(v) => ControlFlow::Break(R::from_residual(v)),
@ -220,9 +220,8 @@ pub fn from_try(r: R) -> Self {
}
/// Convert a `ControlFlow` into any type implementing `Try`;
#[unstable(feature = "control_flow_enum", reason = "new API", issue = "75744")]
#[inline]
pub fn into_try(self) -> R {
pub(crate) fn into_try(self) -> R {
match self {
ControlFlow::Continue(v) => R::from_output(v),
ControlFlow::Break(v) => v,