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rustdoc: Move display_fn struct inside display_fn
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This makes it clear that it's an implementation detail of `display_fn`
and shouldn't be used elsewhere, and it enforces in the compiler that no
one else can use it.
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camelid committed Jan 29, 2021
1 parent bf193d6 commit c34faad
Showing 1 changed file with 11 additions and 11 deletions.
22 changes: 11 additions & 11 deletions src/librustdoc/html/format.rs
Original file line number Diff line number Diff line change
Expand Up @@ -1322,16 +1322,16 @@ impl clean::GenericArg {
}

crate fn display_fn(f: impl FnOnce(&mut fmt::Formatter<'_>) -> fmt::Result) -> impl fmt::Display {
WithFormatter(Cell::new(Some(f)))
}

struct WithFormatter<F>(Cell<Option<F>>);

impl<F> fmt::Display for WithFormatter<F>
where
F: FnOnce(&mut fmt::Formatter<'_>) -> fmt::Result,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
(self.0.take()).unwrap()(f)
struct WithFormatter<F>(Cell<Option<F>>);

impl<F> fmt::Display for WithFormatter<F>
where
F: FnOnce(&mut fmt::Formatter<'_>) -> fmt::Result,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
(self.0.take()).unwrap()(f)
}
}

WithFormatter(Cell::new(Some(f)))
}

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