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// SPDX-FileCopyrightText: 2025 Stefan Majewsky <majewsky@gmx.net>
// SPDX-License-Identifier: Apache-2.0
// Package is contains functions to express binary operations in a curried style.
// For example, "foo < bar" can be rewritten as "is.LessThan(bar)(foo)".
//
// This is not useful on its own, but may significantly improve readability
// when replacing function literals. Consider the following example:
//
// import . "github.com/majewsky/gg/option"
//
// func checkNewVolumeSize(size, usage uint64, maxSize Option[uint64]) error {
// switch {
// case size < usage:
// return errors.New("size cannot be smaller than usage")
// case maxSize.IsSomeAnd(func(value uint64) bool { return maxSize < size }):
// return errors.New("size cannot be larger than maximum")
// }
// }
//
// The IsSomeAnd() check is difficult to read because function literals in Go are clunky.
// This can be rewritten in a clearer way using is.LessThan():
//
// // original
// case maxSize.IsSomeAnd(func(value uint64) bool { return maxSize < size }):
// // rewritten
// case maxSize.IsSomeAnd(is.LessThan(size)):
package is
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