mirror of https://github.com/tidwall/tile38.git
30 lines
1.1 KiB
Go
30 lines
1.1 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Package pragma provides types that can be embedded into a struct to
|
|
// statically enforce or prevent certain language properties.
|
|
package pragma
|
|
|
|
import "sync"
|
|
|
|
// NoUnkeyedLiterals can be embedded in a struct to prevent unkeyed literals.
|
|
type NoUnkeyedLiterals struct{}
|
|
|
|
// DoNotImplement can be embedded in an interface to prevent trivial
|
|
// implementations of the interface.
|
|
//
|
|
// This is useful to prevent unauthorized implementations of an interface
|
|
// so that it can be extended in the future for any protobuf language changes.
|
|
type DoNotImplement interface{ ProtoInternal(DoNotImplement) }
|
|
|
|
// DoNotCompare can be embedded in a struct to prevent comparability.
|
|
type DoNotCompare [0]func()
|
|
|
|
// DoNotCopy can be embedded in a struct to help prevent shallow copies.
|
|
// This does not rely on a Go language feature, but rather a special case
|
|
// within the vet checker.
|
|
//
|
|
// See https://golang.org/issues/8005.
|
|
type DoNotCopy [0]sync.Mutex
|