// C string to Go string
	func C.GoString(*C.char) string

	// C data with explicit length to Go string
	func C.GoStringN(*C.char, C.int) string

	// C data with explicit length to Go []byte
	func C.GoBytes(unsafe.Pointer, C.int) []byte

As a special case, C.malloc does not call the C library malloc directly
but instead calls a Go helper function that wraps the C library malloc

happen on the heap. var out [{{ .Prefix }}ElementLen]byte return e.bytes(&out) } func (e *{{ .Element }}) bytes(out *[{{ .Prefix }}ElementLen]byte) []byte { var tmp {{ .Prefix }}NonMontgomeryDomainF {{ .Prefix }}FromMontgomery(&tmp, &e.x) {{ .Prefix }}ToBytes(out, (*{{ .Prefix }}UntypedFieldElement)(&tmp)) {{ .Prefix }}InvertEndianness(out[:]) return out[:] } // SetBytes sets e = v, where v is a big-endian {{ .BytesLen }}-byte encoding, and returns e. // If v is not {{ .BytesLen }} bytes or it encodes...