47 lines
1.3 KiB
Rust
47 lines
1.3 KiB
Rust
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// NOTE: this module is a candidate for extraction into its own crate, or should be replaced with
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// an existing crate.
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/// Specify an interval across the data type T
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pub struct Interval<T> {
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start: T,
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start_incl: bool,
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end: T,
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end_incl: bool,
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}
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impl<T> Interval<T>
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where
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T: Clone + Ord,
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{
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/// Create a new interval from the start value to the end value, specifying inclusivity on
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/// either end of the interval.
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pub fn new(start: T, start_incl: bool, end: T, end_incl: bool) -> Interval<T> {
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Interval {
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start,
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start_incl,
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end,
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end_incl,
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}
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}
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/// Create an interval that matches *exactly* the specified value.
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pub fn exact(val: T) -> Interval<T> {
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Interval {
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start: val.clone(),
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start_incl: true,
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end: val,
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end_incl: true,
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}
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}
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/// Test whether a value is included in the specified interval.
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pub fn contains(&self, val: T) -> bool {
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match (self.start_incl, self.end_incl) {
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(true, true) => self.start <= val && val <= self.end,
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(true, false) => self.start <= val && val < self.end,
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(false, true) => self.start < val && val <= self.end,
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(false, false) => self.start < val && val < self.end,
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}
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}
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}
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