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Rollup merge of #42717 - ollie27:into_to_from2, r=sfackler
Convert `Into<Box<[T]>> for Vec<T>` into `From<Vec<T>> for Box<[T]>` As the `collections` crate has been merged into `alloc` in #42648 this impl is now possible. This is the final part of #42129 missing from #42227.
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commit
dbe16e067f
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@ -2124,10 +2124,12 @@ fn from(s: Box<[T]>) -> Vec<T> {
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}
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}
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#[stable(feature = "box_from_vec", since = "1.18.0")]
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impl<T> Into<Box<[T]>> for Vec<T> {
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fn into(self) -> Box<[T]> {
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self.into_boxed_slice()
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// note: test pulls in libstd, which causes errors here
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#[cfg(not(test))]
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#[stable(feature = "box_from_vec", since = "1.20.0")]
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impl<T> From<Vec<T>> for Box<[T]> {
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fn from(v: Vec<T>) -> Box<[T]> {
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v.into_boxed_slice()
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}
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}
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