diff

const (
	// CompatibilityNotApplicable indicates that there are no changes.
	CompatibilityNotApplicable ReasonCompatibility = "n/a"

	// BackwardCompatible indicates that the change is backward-compatible.
	BackwardCompatible = "compatible"

	// BackwardIncompatible indicates that the change is backward-incompatible,
	// and that existing users of the code will break.
	BackwardIncompatible = "breaking"
)

const (
	// PackageDiffReasonNotApplicable is applied to packages that have not changed.
	PackageDiffReasonNotApplicable PackageDiffReason = 0

	// PackageDiffReasonExportedTypesRemoved indicates an exported type was removed.
	PackageDiffReasonExportedTypesRemoved = 1 << iota

	// PackageDiffReasonExportedTypesAdded indicates an exported type was added.
	PackageDiffReasonExportedTypesAdded

	// PackageDiffReasonExportedTypesChanged indicates an exported type was changed.
	PackageDiffReasonExportedTypesChanged

	// PackageDiffReasonExportedMembersRemoved indicates an exported member was removed.
	PackageDiffReasonExportedMembersRemoved

	// PackageDiffReasonExportedMembersAdded indicates an exported member was added.
	PackageDiffReasonExportedMembersAdded

	// PackageDiffReasonExportedMembersChanged indicates an exported member was changed.
	PackageDiffReasonExportedMembersChanged
)

const (
	// TypeDiffReasonNotApplicable is applied to types that have not changed.
	TypeDiffReasonNotApplicable TypeDiffReason = 0

	// TypeDiffReasonKindChanged indicates that the kind of the type has changed.
	TypeDiffReasonKindChanged = 1 << iota

	// TypeDiffReasonGenericsChanged indicates that the generics of the type have changed.
	TypeDiffReasonGenericsChanged

	// TypeDiffReasonParentTypesChanged indicates that the parent type(s) of the type have changed.
	TypeDiffReasonParentTypesChanged

	// TypeDiffReasonPricipalTypeChanged indicates that the principal type of the type has changed.
	TypeDiffReasonPricipalTypeChanged

	// TypeDiffReasonAttributesAdded indicates that one or more attributes on the type were added.
	TypeDiffReasonAttributesAdded

	// TypeDiffReasonAttributesRemoved indicates that one or more attributes on the type were removed.
	TypeDiffReasonAttributesRemoved

	// TypeDiffReasonExportedMembersAdded indicates that some exported members
	// of the type have been added.
	TypeDiffReasonExportedMembersAdded

	// TypeDiffReasonExportedMembersRemoved indicates that some exported members
	// of the type have been removed.
	TypeDiffReasonExportedMembersRemoved

	// TypeDiffReasonExportedMembersChanged indicates that some exported members
	// of the type have been changed, in some manner.
	TypeDiffReasonExportedMembersChanged

	// TypeDiffReasonRequiredMemberAdded indicates that a *required* member
	// of the type has been added.
	TypeDiffReasonRequiredMemberAdded
)

const (
	// MemberDiffReasonNotApplicable is applied to members that have not changed.
	MemberDiffReasonNotApplicable MemberDiffReason = 0

	// MemberDiffReasonKindChanged indicates that the kind of the member has changed.
	MemberDiffReasonKindChanged = 1 << iota

	// MemberDiffReasonGenericsChanged indicates that the generics of the member have changed.
	MemberDiffReasonGenericsChanged

	// MemberDiffReasonParametersCompatible indicates that the parameters of the
	// member has changed in a forward compatible manner.
	MemberDiffReasonParametersCompatible

	// MemberDiffReasonParametersNotCompatible indicates that the parameters of the
	// member has changed in a forward incompatible manner.
	MemberDiffReasonParametersNotCompatible

	// MemberDiffReasonTypeNotCompatible indicates that the declared/return type of the
	// member has changed in a forward incompatible manner.
	MemberDiffReasonTypeNotCompatible
)