tree fd193af113f04ffb91b066c3ab76782e953ee2ba
parent cf25308deabb0f090d6842ff4ce1bbe2579fa00e
author Herbie Ong <herbie@google.com> 1545868636 -0800
committer Herbie Ong <herbie@google.com> 1545955591 +0000

reflect/protoregistry: add Types registry

The first commit of protoregistry only added a registry for files.
However, a separate type of registry is needed to provide a mapping between
protobuf names and actual Go types representing those names.

Additional high-level API:
    var GlobalTypes = new(Types)
    type Type interface{ ... }
    type Types struct{ ... }
        func NewTypes(...Type) *Types
        func (*Types) Register(...Type) error
        func (*Types) FindEnumByName(pref.FullName) (pref.EnumType, error)
        func (*Types) FindMessageByName(pref.FullName) (pref.MessageType, error)
        func (*Types) FindMessageByURL(string) (pref.MessageType, error)
        func (*Types) FindExtensionByName(pref.FullName) (pref.ExtensionType, error)
        func (*Types) FindExtensionByNumber(pref.FullName, pref.FieldNumber) (pref.ExtensionType, error)
        func (*Types) RangeEnums(func(pref.EnumType) bool)
        func (*Types) RangeMessages(func(pref.MessageType) bool)
        func (*Types) RangeExtensions(func(pref.ExtensionType) bool)
        func (*Types) RangeExtensionsByMessage(pref.FullName, func(pref.ExtensionType) bool)

Change-Id: I0d07705801684a1eb5853bcd05fcce12598a0047
Reviewed-on: https://go-review.googlesource.com/c/131345
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>