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Make 'form::ErrorKind' 'From' impl const generic. 

Converts an older style array impl to one that uses const generics,
allowing any array length, not just a few sizes.
This commit is contained in:
Matthew Pomes 2022-05-18 22:39:51 -05:00 committed by Sergio Benitez
parent d92b7249cb
commit f21da79f44
1 changed files with 5 additions and 10 deletions
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9
core/lib/src/form/error.rs
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@ -947,18 +947,13 @@ impl From<(Option<ByteUnit>, Option<ByteUnit>)> for ErrorKind<'_> {
}
}
macro_rules! impl_from_choices {
($($size:literal),*) => ($(
impl<'a, 'v: 'a> From<&'static [Cow<'v, str>; $size]> for ErrorKind<'a> {
fn from(choices: &'static [Cow<'v, str>; $size]) -> Self {
impl<'a, 'v: 'a, const N: usize> From<&'static [Cow<'v, str>; N]> for ErrorKind<'a> {
fn from(choices: &'static [Cow<'v, str>; N]) -> Self {
let choices = &choices[..];
ErrorKind::InvalidChoice { choices: choices.into() }
}
}
)*)
}
impl_from_choices!(1, 2, 3, 4, 5, 6, 7, 8);
macro_rules! impl_from_for {
(<$l:lifetime> $T:ty => $V:ty as $variant:ident) => (