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- // Copyright 2019 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 protoimpl
- import (
- "google.golang.org/protobuf/internal/version"
- )
- const (
- // MaxVersion is the maximum supported version for generated .pb.go files.
- // It is always the current version of the module.
- MaxVersion = version.Minor
- // GenVersion is the runtime version required by generated .pb.go files.
- // This is incremented when generated code relies on new functionality
- // in the runtime.
- GenVersion = 20
- // MinVersion is the minimum supported version for generated .pb.go files.
- // This is incremented when the runtime drops support for old code.
- MinVersion = 0
- )
- // EnforceVersion is used by code generated by protoc-gen-go
- // to statically enforce minimum and maximum versions of this package.
- // A compilation failure implies either that:
- // * the runtime package is too old and needs to be updated OR
- // * the generated code is too old and needs to be regenerated.
- //
- // The runtime package can be upgraded by running:
- // go get google.golang.org/protobuf
- //
- // The generated code can be regenerated by running:
- // protoc --go_out=${PROTOC_GEN_GO_ARGS} ${PROTO_FILES}
- //
- // Example usage by generated code:
- // const (
- // // Verify that this generated code is sufficiently up-to-date.
- // _ = protoimpl.EnforceVersion(genVersion - protoimpl.MinVersion)
- // // Verify that runtime/protoimpl is sufficiently up-to-date.
- // _ = protoimpl.EnforceVersion(protoimpl.MaxVersion - genVersion)
- // )
- //
- // The genVersion is the current minor version used to generated the code.
- // This compile-time check relies on negative integer overflow of a uint
- // being a compilation failure (guaranteed by the Go specification).
- type EnforceVersion uint
- // This enforces the following invariant:
- // MinVersion ≤ GenVersion ≤ MaxVersion
- const (
- _ = EnforceVersion(GenVersion - MinVersion)
- _ = EnforceVersion(MaxVersion - GenVersion)
- )
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