46 lines
985 B
Rust
46 lines
985 B
Rust
use core::ops::{Range, RangeFrom, RangeFull, RangeTo};
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// Taken from https://github.com/bluss/odds/blob/master/src/range.rs.
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/// **IndexRange** is implemented by Rust's built-in range types, produced
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/// by range syntax like `..`, `a..`, `..b` or `c..d`.
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pub trait IndexRange<T = usize> {
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#[inline]
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/// Start index (inclusive)
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fn start(&self) -> Option<T> {
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None
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}
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#[inline]
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/// End index (exclusive)
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fn end(&self) -> Option<T> {
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None
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}
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}
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impl<T> IndexRange<T> for RangeFull {}
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impl<T: Copy> IndexRange<T> for RangeFrom<T> {
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#[inline]
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fn start(&self) -> Option<T> {
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Some(self.start)
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}
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}
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impl<T: Copy> IndexRange<T> for RangeTo<T> {
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#[inline]
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fn end(&self) -> Option<T> {
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Some(self.end)
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}
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}
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impl<T: Copy> IndexRange<T> for Range<T> {
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#[inline]
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fn start(&self) -> Option<T> {
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Some(self.start)
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}
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#[inline]
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fn end(&self) -> Option<T> {
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Some(self.end)
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}
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}
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