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Added Feature - Add MustParseBytes to support byte-slice UUID parsing #212

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Added Feature - Add MustParseBytes to support byte-slice UUID parsing #212

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21 changes: 16 additions & 5 deletions uuid.go
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Original file line number Diff line number Diff line change
Expand Up @@ -52,7 +52,7 @@ var (
ErrInvalidBracketedFormat = errors.New("invalid bracketed UUID format")
)

type URNPrefixError struct { prefix string }
type URNPrefixError struct{ prefix string }

func (e URNPrefixError) Error() string {
return fmt.Sprintf("invalid urn prefix: %q", e.prefix)
Expand Down Expand Up @@ -199,6 +199,16 @@ func MustParse(s string) UUID {
return uuid
}

// MustParseBytes is like ParseBytes but panics if the byte slice cannot be parsed.
// It simplifies safe initialization of global variables holding compiled UUIDs.
func MustParseBytes(b []byte) UUID {
uuid, err := ParseBytes(b)
if err != nil {
panic(`uuid: ParseBytes(` + string(b) + `): ` + err.Error())
}
return uuid
}

// FromBytes creates a new UUID from a byte slice. Returns an error if the slice
// does not have a length of 16. The bytes are copied from the slice.
func FromBytes(b []byte) (uuid UUID, err error) {
Expand All @@ -215,10 +225,11 @@ func Must(uuid UUID, err error) UUID {
}

// Validate returns an error if s is not a properly formatted UUID in one of the following formats:
// xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
// {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
// xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
// {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
//
// It returns an error if the format is invalid, otherwise nil.
func Validate(s string) error {
switch len(s) {
Expand Down