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30 lines
1.1 KiB
Go
30 lines
1.1 KiB
Go
2 years ago
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// Copyright 2018 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 pragma provides types that can be embedded into a struct to
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// statically enforce or prevent certain language properties.
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package pragma
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import "sync"
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// NoUnkeyedLiterals can be embedded in a struct to prevent unkeyed literals.
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type NoUnkeyedLiterals struct{}
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// DoNotImplement can be embedded in an interface to prevent trivial
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// implementations of the interface.
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//
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// This is useful to prevent unauthorized implementations of an interface
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// so that it can be extended in the future for any protobuf language changes.
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type DoNotImplement interface{ ProtoInternal(DoNotImplement) }
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// DoNotCompare can be embedded in a struct to prevent comparability.
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type DoNotCompare [0]func()
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// DoNotCopy can be embedded in a struct to help prevent shallow copies.
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// This does not rely on a Go language feature, but rather a special case
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// within the vet checker.
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//
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// See https://golang.org/issues/8005.
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type DoNotCopy [0]sync.Mutex
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