Source file src/golang.org/x/exp/slices/cmp.go

Documentation: golang.org/x/exp/slices

     1  // Copyright 2023 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package slices
     6  
     7  import "golang.org/x/exp/constraints"
     8  
     9  // min is a version of the predeclared function from the Go 1.21 release.
    10  func min[T constraints.Ordered](a, b T) T {
    11  	if a < b || isNaN(a) {
    12  		return a
    13  	}
    14  	return b
    15  }
    16  
    17  // max is a version of the predeclared function from the Go 1.21 release.
    18  func max[T constraints.Ordered](a, b T) T {
    19  	if a > b || isNaN(a) {
    20  		return a
    21  	}
    22  	return b
    23  }
    24  
    25  // cmpLess is a copy of cmp.Less from the Go 1.21 release.
    26  func cmpLess[T constraints.Ordered](x, y T) bool {
    27  	return (isNaN(x) && !isNaN(y)) || x < y
    28  }
    29  
    30  // cmpCompare is a copy of cmp.Compare from the Go 1.21 release.
    31  func cmpCompare[T constraints.Ordered](x, y T) int {
    32  	xNaN := isNaN(x)
    33  	yNaN := isNaN(y)
    34  	if xNaN && yNaN {
    35  		return 0
    36  	}
    37  	if xNaN || x < y {
    38  		return -1
    39  	}
    40  	if yNaN || x > y {
    41  		return +1
    42  	}
    43  	return 0
    44  }
    45  

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