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moby--moby/vendor/github.com/docker/swarmkit/api/deepcopy/copy.go
Aaron Lehmann 3e987e1732 Vendor swarmkit, containerd, and related dependencies
Update swarmkit to 037b491.

As swarmkit switched to a newer gRPC version, this also involves
updating Docker's vendored gRPC, which in turn requires updating
containerd to a new version that has protobufs generated against this
gRPC version.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
2017-01-23 17:51:14 -08:00

44 lines
1.1 KiB
Go

package deepcopy
import (
"fmt"
"time"
"github.com/gogo/protobuf/types"
)
// CopierFrom can be implemented if an object knows how to copy another into itself.
type CopierFrom interface {
// Copy takes the fields from src and copies them into the target object.
//
// Calling this method with a nil receiver or a nil src may panic.
CopyFrom(src interface{})
}
// Copy copies src into dst. dst and src must have the same type.
//
// If the type has a copy function defined, it will be used.
//
// Default implementations for builtin types and well known protobuf types may
// be provided.
//
// If the copy cannot be performed, this function will panic. Make sure to test
// types that use this function.
func Copy(dst, src interface{}) {
switch dst := dst.(type) {
case *types.Duration:
src := src.(*types.Duration)
*dst = *src
case *time.Duration:
src := src.(*time.Duration)
*dst = *src
case *types.Timestamp:
src := src.(*types.Timestamp)
*dst = *src
case CopierFrom:
dst.CopyFrom(src)
default:
panic(fmt.Sprintf("Copy for %T not implemented", dst))
}
}