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</pre><pre class='rust '>
<span class='doccomment'>//! Comparators.</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! A comparator is any type that implements the [`Compare`](trait.Compare.html) trait,</span>
<span class='doccomment'>//! which imposes a [total order](https://en.wikipedia.org/wiki/Total_order). Its</span>
<span class='doccomment'>//! [`compare`](trait.Compare.html#tymethod.compare) method accepts two values, which may</span>
<span class='doccomment'>//! be of the same type or different types, and returns an ordering on them.</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! Comparators are useful for parameterizing the behavior of sort methods and certain</span>
<span class='doccomment'>//! data structures.</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! The most basic comparator is [`Natural`](struct.Natural.html), which simply delegates</span>
<span class='doccomment'>//! to the type's implementation of [`Ord`]</span>
<span class='doccomment'>//! (http://doc.rust-lang.org/std/cmp/trait.Ord.html):</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//! use compare::{Compare, natural};</span>
<span class='doccomment'>//! use std::cmp::Ordering::{Less, Equal, Greater};</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let a = &1;</span>
<span class='doccomment'>//! let b = &2;</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let cmp = natural();</span>
<span class='doccomment'>//! assert_eq!(cmp.compare(a, b), Less);</span>
<span class='doccomment'>//! assert_eq!(cmp.compare(b, a), Greater);</span>
<span class='doccomment'>//! assert_eq!(cmp.compare(a, a), Equal);</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! There are convenience methods for checking each of the six relations:</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//! use compare::{Compare, natural};</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let a = &1;</span>
<span class='doccomment'>//! let b = &2;</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let cmp = natural();</span>
<span class='doccomment'>//! assert!(cmp.compares_lt(a, b));</span>
<span class='doccomment'>//! assert!(cmp.compares_le(a, b));</span>
<span class='doccomment'>//! assert!(cmp.compares_ge(b, a));</span>
<span class='doccomment'>//! assert!(cmp.compares_gt(b, a));</span>
<span class='doccomment'>//! assert!(cmp.compares_eq(a, a));</span>
<span class='doccomment'>//! assert!(cmp.compares_ne(a, b));</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! The `Compare` trait also provides default methods that</span>
<span class='doccomment'>//! consume a comparator to produce a new one with different behavior, similar to</span>
<span class='doccomment'>//! [iterator adaptors](http://doc.rust-lang.org/std/iter/trait.IteratorExt.html). For</span>
<span class='doccomment'>//! example, all comparators can be [reversed](trait.Compare.html#method.rev):</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//! use compare::{Compare, natural};</span>
<span class='doccomment'>//! use std::cmp::Ordering::Greater;</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let cmp = natural().rev();</span>
<span class='doccomment'>//! assert_eq!(cmp.compare(&1, &2), Greater);</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! It is possible to implement a comparator that is not based on the natural ordering of</span>
<span class='doccomment'>//! a type by using a closure of type `Fn(&L, &R) -> Ordering`. For example, slices</span>
<span class='doccomment'>//! can be compared by their length instead of their contents:</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//! use compare::Compare;</span>
<span class='doccomment'>//! use std::cmp::Ordering::{Less, Greater};</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let a = [1, 2, 3];</span>
<span class='doccomment'>//! let b = [4, 5];</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let cmp = |l: &[i32], r: &[i32]| l.len().cmp(&r.len());</span>
<span class='doccomment'>//! assert_eq!(cmp.compare(&a, &b), Greater);</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let cmp = cmp.rev();</span>
<span class='doccomment'>//! assert_eq!(cmp.compare(&a, &b), Less);</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! Comparators can be combined [lexicographically]</span>
<span class='doccomment'>//! (https://en.wikipedia.org/wiki/Lexicographical_order) in order to compare values</span>
<span class='doccomment'>//! first by one key, [then](trait.Compare.html#method.then), if the first keys were</span>
<span class='doccomment'>//! equal, by another:</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//! use compare::Compare;</span>
<span class='doccomment'>//! use std::cmp::Ordering::{Less, Equal, Greater};</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! struct Pet { name: &'static str, age: u8 }</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let fido4 = &Pet { name: "Fido", age: 4 };</span>
<span class='doccomment'>//! let ruff2 = &Pet { name: "Ruff", age: 2 };</span>
<span class='doccomment'>//! let fido3 = &Pet { name: "Fido", age: 3 };</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let name_cmp = |l: &Pet, r: &Pet| l.name.cmp(r.name);</span>
<span class='doccomment'>//! assert_eq!(name_cmp.compare(fido4, ruff2), Less);</span>
<span class='doccomment'>//! assert_eq!(name_cmp.compare(fido4, fido3), Equal);</span>
<span class='doccomment'>//! assert_eq!(name_cmp.compare(ruff2, fido3), Greater);</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let age_cmp = |l: &Pet, r: &Pet| l.age.cmp(&r.age);</span>
<span class='doccomment'>//! assert_eq!(age_cmp.compare(fido4, ruff2), Greater);</span>
<span class='doccomment'>//! assert_eq!(age_cmp.compare(fido4, fido3), Greater);</span>
<span class='doccomment'>//! assert_eq!(age_cmp.compare(ruff2, fido3), Less);</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let name_age_cmp = name_cmp.then(age_cmp);</span>
<span class='doccomment'>//! assert_eq!(name_age_cmp.compare(fido4, ruff2), Less);</span>
<span class='doccomment'>//! assert_eq!(name_age_cmp.compare(fido4, fido3), Greater);</span>
<span class='doccomment'>//! assert_eq!(name_age_cmp.compare(ruff2, fido3), Greater);</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! It is often repetitive to compare two values of the same type by the same key, so the</span>
<span class='doccomment'>//! [key-extraction logic](struct.Extract.html) can be factored out, simplifying the</span>
<span class='doccomment'>//! previous example:</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! ```</span>
<span class='doccomment'>//! use compare::{Compare, Extract};</span>
<span class='doccomment'>//! use std::cmp::Ordering::{Less, Greater};</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! struct Pet { name: &'static str, age: u8 }</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let fido4 = &Pet { name: "Fido", age: 4 };</span>
<span class='doccomment'>//! let ruff2 = &Pet { name: "Ruff", age: 2 };</span>
<span class='doccomment'>//! let fido3 = &Pet { name: "Fido", age: 3 };</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! let name_age_cmp = Extract::new(|p: &Pet| p.name)</span>
<span class='doccomment'>//! .then(Extract::new(|p: &Pet| p.age));</span>
<span class='doccomment'>//!</span>
<span class='doccomment'>//! assert_eq!(name_age_cmp.compare(fido4, ruff2), Less);</span>
<span class='doccomment'>//! assert_eq!(name_age_cmp.compare(fido4, fido3), Greater);</span>
<span class='doccomment'>//! assert_eq!(name_age_cmp.compare(ruff2, fido3), Greater);</span>
<span class='doccomment'>//! ```</span>
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>borrow</span>::<span class='ident'>Borrow</span>;
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>cmp</span>::<span class='ident'>Ordering</span>::{<span class='self'>self</span>, <span class='ident'>Less</span>, <span class='ident'>Equal</span>, <span class='ident'>Greater</span>};
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>default</span>::<span class='ident'>Default</span>;
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>marker</span>::<span class='ident'>PhantomData</span>;
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>fmt</span>::{<span class='self'>self</span>, <span class='ident'>Debug</span>};
<span class='doccomment'>/// Returns the maximum of two values according to the given comparator, or `r` if they</span>
<span class='doccomment'>/// are equal.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Examples</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>/// use compare::{Extract, max};</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// struct Foo { key: char, id: u8 }</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let f1 = &Foo { key: 'a', id: 1};</span>
<span class='doccomment'>/// let f2 = &Foo { key: 'a', id: 2};</span>
<span class='doccomment'>/// let f3 = &Foo { key: 'b', id: 3};</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let cmp = Extract::new(|f: &Foo| f.key);</span>
<span class='doccomment'>/// assert_eq!(max(&cmp, f1, f2).id, f2.id);</span>
<span class='doccomment'>/// assert_eq!(max(&cmp, f1, f3).id, f3.id);</span>
<span class='doccomment'>/// ```</span>
<span class='comment'>// FIXME: convert to default method on `Compare` once where clauses permit equality</span>
<span class='comment'>// (https://github.com/rust-lang/rust/issues/20041)</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>max</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>C</span>: ?<span class='ident'>Sized</span>, <span class='ident'>T</span>: ?<span class='ident'>Sized</span><span class='op'>></span>(<span class='ident'>cmp</span>: <span class='kw-2'>&</span><span class='ident'>C</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>T</span>) <span class='op'>-></span> <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>T</span>
<span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> {
<span class='kw'>if</span> <span class='ident'>cmp</span>.<span class='ident'>compares_ge</span>(<span class='ident'>r</span>, <span class='ident'>l</span>) { <span class='ident'>r</span> } <span class='kw'>else</span> { <span class='ident'>l</span> }
}
<span class='doccomment'>/// Returns the minimum of two values according to the given comparator, or `l` if they</span>
<span class='doccomment'>/// are equal.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Examples</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>/// use compare::{Extract, min};</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// struct Foo { key: char, id: u8 }</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let f1 = &Foo { key: 'b', id: 1};</span>
<span class='doccomment'>/// let f2 = &Foo { key: 'b', id: 2};</span>
<span class='doccomment'>/// let f3 = &Foo { key: 'a', id: 3};</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let cmp = Extract::new(|f: &Foo| f.key);</span>
<span class='doccomment'>/// assert_eq!(min(&cmp, f1, f2).id, f1.id);</span>
<span class='doccomment'>/// assert_eq!(min(&cmp, f1, f3).id, f3.id);</span>
<span class='doccomment'>/// ```</span>
<span class='comment'>// FIXME: convert to default method on `Compare` once where clauses permit equality</span>
<span class='comment'>// (https://github.com/rust-lang/rust/issues/20041)</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>min</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>C</span>: ?<span class='ident'>Sized</span>, <span class='ident'>T</span>: ?<span class='ident'>Sized</span><span class='op'>></span>(<span class='ident'>cmp</span>: <span class='kw-2'>&</span><span class='ident'>C</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>T</span>) <span class='op'>-></span> <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>T</span>
<span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> {
<span class='kw'>if</span> <span class='ident'>cmp</span>.<span class='ident'>compares_le</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) { <span class='ident'>l</span> } <span class='kw'>else</span> { <span class='ident'>r</span> }
}
<span class='doccomment'>/// A comparator imposing a [total order](https://en.wikipedia.org/wiki/Total_order).</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// See the [`compare` module's documentation](index.html) for detailed usage.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// The `compares_*` methods may be overridden to provide more efficient implementations.</span>
<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>L</span>: ?<span class='ident'>Sized</span>, <span class='ident'>R</span>: ?<span class='ident'>Sized</span> <span class='op'>=</span> <span class='ident'>L</span><span class='op'>></span> {
<span class='doccomment'>/// Compares two values, returning `Less`, `Equal`, or `Greater` if `l` is less</span>
<span class='doccomment'>/// than, equal to, or greater than `r`, respectively.</span>
<span class='kw'>fn</span> <span class='ident'>compare</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>Ordering</span>;
<span class='doccomment'>/// Checks if `l` is less than `r`.</span>
<span class='kw'>fn</span> <span class='ident'>compares_lt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='ident'>compare</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) <span class='op'>==</span> <span class='ident'>Less</span> }
<span class='doccomment'>/// Checks if `l` is less than or equal to `r`.</span>
<span class='kw'>fn</span> <span class='ident'>compares_le</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='ident'>compare</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) <span class='op'>!=</span> <span class='ident'>Greater</span> }
<span class='doccomment'>/// Checks if `l` is greater than or equal to `r`.</span>
<span class='kw'>fn</span> <span class='ident'>compares_ge</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='ident'>compare</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) <span class='op'>!=</span> <span class='ident'>Less</span> }
<span class='doccomment'>/// Checks if `l` is greater than `r`.</span>
<span class='kw'>fn</span> <span class='ident'>compares_gt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='ident'>compare</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) <span class='op'>==</span> <span class='ident'>Greater</span> }
<span class='doccomment'>/// Checks if `l` is equal to `r`.</span>
<span class='kw'>fn</span> <span class='ident'>compares_eq</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='ident'>compare</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) <span class='op'>==</span> <span class='ident'>Equal</span> }
<span class='doccomment'>/// Checks if `l` is not equal to `r`.</span>
<span class='kw'>fn</span> <span class='ident'>compares_ne</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='ident'>compare</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) <span class='op'>!=</span> <span class='ident'>Equal</span> }
<span class='doccomment'>/// Borrows the comparator's parameters before comparing them.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Examples</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>/// use compare::{Compare, natural};</span>
<span class='doccomment'>/// use std::cmp::Ordering::{Less, Equal, Greater};</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let a_str = "a";</span>
<span class='doccomment'>/// let a_string = a_str.to_string();</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let b_str = "b";</span>
<span class='doccomment'>/// let b_string = b_str.to_string();</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let cmp = natural().borrowing();</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(a_str, &a_string), Equal);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(a_str, b_str), Less);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(&b_string, a_str), Greater);</span>
<span class='doccomment'>/// ```</span>
<span class='kw'>fn</span> <span class='ident'>borrowing</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>Borrowing</span><span class='op'><</span><span class='kw'>Self</span>, <span class='ident'>L</span>, <span class='ident'>R</span><span class='op'>></span> <span class='kw'>where</span> <span class='kw'>Self</span>: <span class='ident'>Sized</span> { <span class='ident'>Borrowing</span>(<span class='self'>self</span>, <span class='ident'>PhantomData</span>) }
<span class='doccomment'>/// Reverses the ordering of the comparator.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Examples</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>/// use compare::{Compare, natural};</span>
<span class='doccomment'>/// use std::cmp::Ordering::{Less, Equal, Greater};</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let a = &1;</span>
<span class='doccomment'>/// let b = &2;</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let cmp = natural().rev();</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(a, b), Greater);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(b, a), Less);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(a, a), Equal);</span>
<span class='doccomment'>/// ```</span>
<span class='kw'>fn</span> <span class='ident'>rev</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>Rev</span><span class='op'><</span><span class='kw'>Self</span><span class='op'>></span> <span class='kw'>where</span> <span class='kw'>Self</span>: <span class='ident'>Sized</span> { <span class='ident'>Rev</span>(<span class='self'>self</span>) }
<span class='doccomment'>/// Swaps the comparator's parameters, maintaining the underlying ordering.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// This is useful for providing a comparator `C: Compare<T, U>` in a context that</span>
<span class='doccomment'>/// expects `C: Compare<U, T>`.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Examples</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>/// use compare::Compare;</span>
<span class='doccomment'>/// use std::cmp::Ordering::{Less, Equal, Greater};</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let cmp = |l: &u8, r: &u16| (*l as u16).cmp(r);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(&1u8, &2u16), Less);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(&2u8, &1u16), Greater);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(&1u8, &1u16), Equal);</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let cmp = cmp.swap();</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(&2u16, &1u8), Less);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(&1u16, &2u8), Greater);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(&1u16, &1u8), Equal);</span>
<span class='doccomment'>/// ```</span>
<span class='kw'>fn</span> <span class='ident'>swap</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>Swap</span><span class='op'><</span><span class='kw'>Self</span><span class='op'>></span> <span class='kw'>where</span> <span class='kw'>Self</span>: <span class='ident'>Sized</span> { <span class='ident'>Swap</span>(<span class='self'>self</span>) }
<span class='doccomment'>/// [Lexicographically](https://en.wikipedia.org/wiki/Lexicographical_order) combines</span>
<span class='doccomment'>/// the comparator with another.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// The retuned comparator compares values first using `self`, then, if they are</span>
<span class='doccomment'>/// equal, using `then`.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Examples</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>/// use compare::{Compare, Extract};</span>
<span class='doccomment'>/// use std::cmp::Ordering::{Less, Equal};</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// struct Foo { key1: char, key2: u8 }</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let f1 = &Foo { key1: 'a', key2: 2};</span>
<span class='doccomment'>/// let f2 = &Foo { key1: 'a', key2: 3};</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let cmp = Extract::new(|foo: &Foo| foo.key1);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(f1, f2), Equal);</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let cmp = cmp.then(Extract::new(|foo: &Foo| foo.key2));</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(f1, f2), Less);</span>
<span class='doccomment'>/// ```</span>
<span class='kw'>fn</span> <span class='ident'>then</span><span class='op'><</span><span class='ident'>D</span><span class='op'>></span>(<span class='self'>self</span>, <span class='ident'>then</span>: <span class='ident'>D</span>) <span class='op'>-></span> <span class='ident'>Then</span><span class='op'><</span><span class='kw'>Self</span>, <span class='ident'>D</span><span class='op'>></span> <span class='kw'>where</span> <span class='ident'>D</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>L</span>, <span class='ident'>R</span><span class='op'>></span>, <span class='kw'>Self</span>: <span class='ident'>Sized</span> {
<span class='ident'>Then</span>(<span class='self'>self</span>, <span class='ident'>then</span>)
}
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>F</span>: ?<span class='ident'>Sized</span>, <span class='ident'>L</span>: ?<span class='ident'>Sized</span>, <span class='ident'>R</span>: ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>L</span>, <span class='ident'>R</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>F</span>
<span class='kw'>where</span> <span class='ident'>F</span>: <span class='ident'>Fn</span>(<span class='kw-2'>&</span><span class='ident'>L</span>, <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>Ordering</span> {
<span class='kw'>fn</span> <span class='ident'>compare</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>Ordering</span> { (<span class='op'>*</span><span class='self'>self</span>)(<span class='ident'>l</span>, <span class='ident'>r</span>) }
}
<span class='doccomment'>/// A comparator that borrows its parameters before comparing them.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// See [`Compare::borrow`](trait.Compare.html#method.borrow) for an example.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Borrowing</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>: ?<span class='ident'>Sized</span>, <span class='ident'>Rb</span>: ?<span class='ident'>Sized</span> <span class='op'>=</span> <span class='ident'>Lb</span><span class='op'>></span>(<span class='ident'>C</span>, <span class='ident'>PhantomData</span><span class='op'><</span><span class='kw'>fn</span>(<span class='kw-2'>&</span><span class='ident'>Lb</span>, <span class='kw-2'>&</span><span class='ident'>Rb</span>)<span class='op'>></span>)
<span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span>;
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>L</span>: ?<span class='ident'>Sized</span>, <span class='ident'>R</span>: ?<span class='ident'>Sized</span>, <span class='ident'>Lb</span>: ?<span class='ident'>Sized</span>, <span class='ident'>Rb</span>: ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>L</span>, <span class='ident'>R</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>Borrowing</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span>, <span class='ident'>L</span>: <span class='ident'>Borrow</span><span class='op'><</span><span class='ident'>Lb</span><span class='op'>></span>, <span class='ident'>R</span>: <span class='ident'>Borrow</span><span class='op'><</span><span class='ident'>Rb</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>compare</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>Ordering</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compare</span>(<span class='ident'>l</span>.<span class='ident'>borrow</span>(), <span class='ident'>r</span>.<span class='ident'>borrow</span>()) }
<span class='kw'>fn</span> <span class='ident'>compares_lt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_lt</span>(<span class='ident'>l</span>.<span class='ident'>borrow</span>(), <span class='ident'>r</span>.<span class='ident'>borrow</span>()) }
<span class='kw'>fn</span> <span class='ident'>compares_le</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_le</span>(<span class='ident'>l</span>.<span class='ident'>borrow</span>(), <span class='ident'>r</span>.<span class='ident'>borrow</span>()) }
<span class='kw'>fn</span> <span class='ident'>compares_ge</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_ge</span>(<span class='ident'>l</span>.<span class='ident'>borrow</span>(), <span class='ident'>r</span>.<span class='ident'>borrow</span>()) }
<span class='kw'>fn</span> <span class='ident'>compares_gt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_gt</span>(<span class='ident'>l</span>.<span class='ident'>borrow</span>(), <span class='ident'>r</span>.<span class='ident'>borrow</span>()) }
<span class='kw'>fn</span> <span class='ident'>compares_eq</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_eq</span>(<span class='ident'>l</span>.<span class='ident'>borrow</span>(), <span class='ident'>r</span>.<span class='ident'>borrow</span>()) }
<span class='kw'>fn</span> <span class='ident'>compares_ne</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_ne</span>(<span class='ident'>l</span>.<span class='ident'>borrow</span>(), <span class='ident'>r</span>.<span class='ident'>borrow</span>()) }
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>: ?<span class='ident'>Sized</span>, <span class='ident'>Rb</span>: ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Clone</span> <span class='kw'>for</span> <span class='ident'>Borrowing</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span> <span class='op'>+</span> <span class='ident'>Clone</span> {
<span class='kw'>fn</span> <span class='ident'>clone</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='kw'>Self</span> { <span class='ident'>Borrowing</span>(<span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>clone</span>(), <span class='ident'>PhantomData</span>) }
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>: ?<span class='ident'>Sized</span>, <span class='ident'>Rb</span>: ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Copy</span> <span class='kw'>for</span> <span class='ident'>Borrowing</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span> <span class='op'>+</span> <span class='ident'>Copy</span> {}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>: ?<span class='ident'>Sized</span>, <span class='ident'>Rb</span>: ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Default</span> <span class='kw'>for</span> <span class='ident'>Borrowing</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span> <span class='op'>+</span> <span class='ident'>Default</span> {
<span class='kw'>fn</span> <span class='ident'>default</span>() <span class='op'>-></span> <span class='kw'>Self</span> { <span class='ident'>Borrowing</span>(<span class='ident'>Default</span>::<span class='ident'>default</span>(), <span class='ident'>PhantomData</span>) }
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>: ?<span class='ident'>Sized</span>, <span class='ident'>Rb</span>: ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>PartialEq</span> <span class='kw'>for</span> <span class='ident'>Borrowing</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span> <span class='op'>+</span> <span class='ident'>PartialEq</span> {
<span class='kw'>fn</span> <span class='ident'>eq</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>other</span>: <span class='kw-2'>&</span><span class='kw'>Self</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span> <span class='op'>==</span> <span class='ident'>other</span>.<span class='number'>0</span> }
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>: ?<span class='ident'>Sized</span>, <span class='ident'>Rb</span>: ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Eq</span> <span class='kw'>for</span> <span class='ident'>Borrowing</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span> <span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span> <span class='op'>+</span> <span class='ident'>Eq</span> {}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>: ?<span class='ident'>Sized</span>, <span class='ident'>Rb</span>: ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Debug</span> <span class='kw'>for</span> <span class='ident'>Borrowing</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>Lb</span>, <span class='ident'>Rb</span><span class='op'>></span> <span class='op'>+</span> <span class='ident'>Debug</span> {
<span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>f</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-></span> <span class='ident'>fmt</span>::<span class='prelude-ty'>Result</span> { <span class='macro'>write</span><span class='macro'>!</span>(<span class='ident'>f</span>, <span class='string'>"Borrowing({:?})"</span>, <span class='self'>self</span>.<span class='number'>0</span>) }
}
<span class='doccomment'>/// A comparator that extracts a sort key from a value.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Examples</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>/// use compare::{Compare, Extract};</span>
<span class='doccomment'>/// use std::cmp::Ordering::Greater;</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let a = [1, 2, 3];</span>
<span class='doccomment'>/// let b = [4, 5];</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let cmp = Extract::new(|s: &[i32]| s.len());</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(&a, &b), Greater);</span>
<span class='doccomment'>/// ```</span>
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Copy</span>, <span class='ident'>Debug</span>, <span class='ident'>Default</span>, <span class='ident'>PartialEq</span>, <span class='ident'>Eq</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Extract</span><span class='op'><</span><span class='ident'>E</span>, <span class='ident'>C</span><span class='op'>></span> {
<span class='ident'>ext</span>: <span class='ident'>E</span>,
<span class='ident'>cmp</span>: <span class='ident'>C</span>,
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span>, <span class='ident'>K</span><span class='op'>></span> <span class='ident'>Extract</span><span class='op'><</span><span class='ident'>E</span>, <span class='ident'>Natural</span><span class='op'><</span><span class='ident'>K</span><span class='op'>>></span> <span class='kw'>where</span> <span class='ident'>K</span>: <span class='ident'>Ord</span> {
<span class='doccomment'>/// Returns a comparator that extracts a sort key using `ext` and compares it according to its</span>
<span class='doccomment'>/// natural ordering.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span><span class='op'><</span><span class='ident'>T</span>: ?<span class='ident'>Sized</span><span class='op'>></span>(<span class='ident'>ext</span>: <span class='ident'>E</span>) <span class='op'>-></span> <span class='kw'>Self</span> <span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>Fn</span>(<span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>K</span> {
<span class='ident'>Extract</span> { <span class='ident'>ext</span>: <span class='ident'>ext</span>, <span class='ident'>cmp</span>: <span class='ident'>natural</span>() }
}
}
<span class='comment'>// FIXME: convert to default method on `Compare` once where clauses permit equality</span>
<span class='comment'>// (https://github.com/rust-lang/rust/issues/20041)</span>
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span>, <span class='ident'>C</span><span class='op'>></span> <span class='ident'>Extract</span><span class='op'><</span><span class='ident'>E</span>, <span class='ident'>C</span><span class='op'>></span> {
<span class='doccomment'>/// Returns a comparator that extracts a sort key using `ext` and compares it using</span>
<span class='doccomment'>/// `cmp`.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>with_cmp</span><span class='op'><</span><span class='ident'>T</span>: ?<span class='ident'>Sized</span>, <span class='ident'>K</span><span class='op'>></span>(<span class='ident'>ext</span>: <span class='ident'>E</span>, <span class='ident'>cmp</span>: <span class='ident'>C</span>) <span class='op'>-></span> <span class='kw'>Self</span>
<span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>Fn</span>(<span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>K</span>, <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>K</span><span class='op'>></span> { <span class='ident'>Extract</span> { <span class='ident'>ext</span>: <span class='ident'>ext</span>, <span class='ident'>cmp</span>: <span class='ident'>cmp</span> } }
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>E</span>, <span class='ident'>C</span>, <span class='ident'>T</span>: ?<span class='ident'>Sized</span>, <span class='ident'>K</span><span class='op'>></span> <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>Extract</span><span class='op'><</span><span class='ident'>E</span>, <span class='ident'>C</span><span class='op'>></span> <span class='kw'>where</span> <span class='ident'>E</span>: <span class='ident'>Fn</span>(<span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>K</span>, <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>K</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>compare</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>Ordering</span> {
<span class='self'>self</span>.<span class='ident'>cmp</span>.<span class='ident'>compare</span>(<span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>l</span>), <span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>r</span>))
}
<span class='kw'>fn</span> <span class='ident'>compares_lt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> {
<span class='self'>self</span>.<span class='ident'>cmp</span>.<span class='ident'>compares_lt</span>(<span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>l</span>), <span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>r</span>))
}
<span class='kw'>fn</span> <span class='ident'>compares_le</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> {
<span class='self'>self</span>.<span class='ident'>cmp</span>.<span class='ident'>compares_le</span>(<span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>l</span>), <span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>r</span>))
}
<span class='kw'>fn</span> <span class='ident'>compares_ge</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> {
<span class='self'>self</span>.<span class='ident'>cmp</span>.<span class='ident'>compares_ge</span>(<span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>l</span>), <span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>r</span>))
}
<span class='kw'>fn</span> <span class='ident'>compares_gt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> {
<span class='self'>self</span>.<span class='ident'>cmp</span>.<span class='ident'>compares_gt</span>(<span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>l</span>), <span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>r</span>))
}
<span class='kw'>fn</span> <span class='ident'>compares_eq</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> {
<span class='self'>self</span>.<span class='ident'>cmp</span>.<span class='ident'>compares_eq</span>(<span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>l</span>), <span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>r</span>))
}
<span class='kw'>fn</span> <span class='ident'>compares_ne</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> {
<span class='self'>self</span>.<span class='ident'>cmp</span>.<span class='ident'>compares_ne</span>(<span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>l</span>), <span class='kw-2'>&</span>(<span class='self'>self</span>.<span class='ident'>ext</span>)(<span class='ident'>r</span>))
}
}
<span class='doccomment'>/// A comparator that [lexicographically]</span>
<span class='doccomment'>/// (https://en.wikipedia.org/wiki/Lexicographical_order) combines two others.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// See [`Compare::then`](trait.Compare.html#method.then) for an example.</span>
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Copy</span>, <span class='ident'>Default</span>, <span class='ident'>PartialEq</span>, <span class='ident'>Eq</span>, <span class='ident'>Debug</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Then</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>D</span><span class='op'>></span>(<span class='ident'>C</span>, <span class='ident'>D</span>);
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>D</span>, <span class='ident'>L</span>: ?<span class='ident'>Sized</span>, <span class='ident'>R</span>: ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>L</span>, <span class='ident'>R</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>Then</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>D</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>L</span>, <span class='ident'>R</span><span class='op'>></span>, <span class='ident'>D</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>L</span>, <span class='ident'>R</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>compare</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>Ordering</span> {
<span class='kw'>match</span> <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compare</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) {
<span class='ident'>Equal</span> <span class='op'>=></span> <span class='self'>self</span>.<span class='number'>1</span>.<span class='ident'>compare</span>(<span class='ident'>l</span>, <span class='ident'>r</span>),
<span class='ident'>order</span> <span class='op'>=></span> <span class='ident'>order</span>,
}
}
}
<span class='doccomment'>/// A comparator that delegates to [`Ord`]</span>
<span class='doccomment'>/// (http://doc.rust-lang.org/std/cmp/trait.Ord.html).</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Examples</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```</span>
<span class='doccomment'>/// use compare::{Compare, natural};</span>
<span class='doccomment'>/// use std::cmp::Ordering::{Less, Equal, Greater};</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let a = &1;</span>
<span class='doccomment'>/// let b = &2;</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// let cmp = natural();</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(a, b), Less);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(b, a), Greater);</span>
<span class='doccomment'>/// assert_eq!(cmp.compare(a, a), Equal);</span>
<span class='doccomment'>/// ```</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Natural</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Ord</span> <span class='op'>+</span> ?<span class='ident'>Sized</span><span class='op'>></span>(<span class='ident'>PhantomData</span><span class='op'><</span><span class='kw'>fn</span>(<span class='kw-2'>&</span><span class='ident'>T</span>)<span class='op'>></span>);
<span class='doccomment'>/// Returns a comparator that delegates to `Ord`.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>natural</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Ord</span> <span class='op'>+</span> ?<span class='ident'>Sized</span><span class='op'>></span>() <span class='op'>-></span> <span class='ident'>Natural</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> { <span class='ident'>Natural</span>(<span class='ident'>PhantomData</span>) }
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Ord</span> <span class='op'>+</span> ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>Natural</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>compare</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>Ordering</span> { <span class='ident'>Ord</span>::<span class='ident'>cmp</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_lt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='ident'>PartialOrd</span>::<span class='ident'>lt</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_le</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='ident'>PartialOrd</span>::<span class='ident'>le</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_ge</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='ident'>PartialOrd</span>::<span class='ident'>ge</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_gt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='ident'>PartialOrd</span>::<span class='ident'>gt</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_eq</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='ident'>PartialEq</span>::<span class='ident'>eq</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_ne</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>T</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>T</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='ident'>PartialEq</span>::<span class='ident'>ne</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Ord</span> <span class='op'>+</span> ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Clone</span> <span class='kw'>for</span> <span class='ident'>Natural</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>clone</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='kw'>Self</span> { <span class='op'>*</span><span class='self'>self</span> }
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Ord</span> <span class='op'>+</span> ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Copy</span> <span class='kw'>for</span> <span class='ident'>Natural</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> {}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Ord</span> <span class='op'>+</span> ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Default</span> <span class='kw'>for</span> <span class='ident'>Natural</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>default</span>() <span class='op'>-></span> <span class='kw'>Self</span> { <span class='ident'>natural</span>() }
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Ord</span> <span class='op'>+</span> ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>PartialEq</span> <span class='kw'>for</span> <span class='ident'>Natural</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>eq</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>_other</span>: <span class='kw-2'>&</span><span class='kw'>Self</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='boolval'>true</span> }
}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Ord</span> <span class='op'>+</span> ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Eq</span> <span class='kw'>for</span> <span class='ident'>Natural</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> {}
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>T</span>: <span class='ident'>Ord</span> <span class='op'>+</span> ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Debug</span> <span class='kw'>for</span> <span class='ident'>Natural</span><span class='op'><</span><span class='ident'>T</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>f</span>: <span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-></span> <span class='ident'>fmt</span>::<span class='prelude-ty'>Result</span> { <span class='macro'>write</span><span class='macro'>!</span>(<span class='ident'>f</span>, <span class='string'>"Natural"</span>) }
}
<span class='doccomment'>/// A comparator that reverses the ordering of another.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// See [`Compare::rev`](trait.Compare.html#method.rev) for an example.</span>
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Copy</span>, <span class='ident'>Default</span>, <span class='ident'>PartialEq</span>, <span class='ident'>Eq</span>, <span class='ident'>Debug</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Rev</span><span class='op'><</span><span class='ident'>C</span><span class='op'>></span>(<span class='ident'>C</span>);
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>L</span>: ?<span class='ident'>Sized</span>, <span class='ident'>R</span>: ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>L</span>, <span class='ident'>R</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>Rev</span><span class='op'><</span><span class='ident'>C</span><span class='op'>></span> <span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>L</span>, <span class='ident'>R</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>compare</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>Ordering</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compare</span>(<span class='ident'>l</span>, <span class='ident'>r</span>).<span class='ident'>reverse</span>() }
<span class='kw'>fn</span> <span class='ident'>compares_lt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_gt</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_le</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_ge</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_ge</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_le</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_gt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_lt</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_eq</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_eq</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_ne</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_ne</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
}
<span class='doccomment'>/// A comparator that swaps another's parameters, maintaining the underlying ordering.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// This is useful for providing a comparator `C: Compare<T, U>` in a context that</span>
<span class='doccomment'>/// expects `C: Compare<U, T>`.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// See [`Compare::swap`](trait.Compare.html#method.swap) for an example.</span>
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Copy</span>, <span class='ident'>Default</span>, <span class='ident'>PartialEq</span>, <span class='ident'>Eq</span>, <span class='ident'>Debug</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Swap</span><span class='op'><</span><span class='ident'>C</span><span class='op'>></span>(<span class='ident'>C</span>);
<span class='kw'>impl</span><span class='op'><</span><span class='ident'>C</span>, <span class='ident'>L</span>: ?<span class='ident'>Sized</span>, <span class='ident'>R</span>: ?<span class='ident'>Sized</span><span class='op'>></span> <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>R</span>, <span class='ident'>L</span><span class='op'>></span> <span class='kw'>for</span> <span class='ident'>Swap</span><span class='op'><</span><span class='ident'>C</span><span class='op'>></span>
<span class='kw'>where</span> <span class='ident'>C</span>: <span class='ident'>Compare</span><span class='op'><</span><span class='ident'>L</span>, <span class='ident'>R</span><span class='op'>></span> {
<span class='kw'>fn</span> <span class='ident'>compare</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>) <span class='op'>-></span> <span class='ident'>Ordering</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compare</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_lt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_lt</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_le</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_le</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_ge</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_ge</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_gt</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_gt</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_eq</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_eq</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
<span class='kw'>fn</span> <span class='ident'>compares_ne</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>r</span>: <span class='kw-2'>&</span><span class='ident'>R</span>, <span class='ident'>l</span>: <span class='kw-2'>&</span><span class='ident'>L</span>) <span class='op'>-></span> <span class='ident'>bool</span> { <span class='self'>self</span>.<span class='number'>0</span>.<span class='ident'>compares_ne</span>(<span class='ident'>l</span>, <span class='ident'>r</span>) }
}
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