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44 lines
1.3 KiB
Go
44 lines
1.3 KiB
Go
// Copyright 2023 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package versions
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// This file contains predicates for working with file versions to
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// decide when a tool should consider a language feature enabled.
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// GoVersions that features in x/tools can be gated to.
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const (
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Go1_18 = "go1.18"
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Go1_19 = "go1.19"
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Go1_20 = "go1.20"
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Go1_21 = "go1.21"
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Go1_22 = "go1.22"
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)
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// Future is an invalid unknown Go version sometime in the future.
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// Do not use directly with Compare.
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const Future = ""
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// AtLeast reports whether the file version v comes after a Go release.
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//
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// Use this predicate to enable a behavior once a certain Go release
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// has happened (and stays enabled in the future).
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func AtLeast(v, release string) bool {
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if v == Future {
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return true // an unknown future version is always after y.
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}
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return Compare(Lang(v), Lang(release)) >= 0
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}
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// Before reports whether the file version v is strictly before a Go release.
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//
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// Use this predicate to disable a behavior once a certain Go release
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// has happened (and stays enabled in the future).
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func Before(v, release string) bool {
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if v == Future {
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return false // an unknown future version happens after y.
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}
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return Compare(Lang(v), Lang(release)) < 0
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}
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