ref: 6ca82e5c86279258bfd4b21195d4521f26082fd4
parent: 9e4a00af4523cdfacbb6b245679e2e60fbc6b375
author: Rangi <remy.oukaour+rangi42@gmail.com>
date: Wed Jul 8 11:30:23 EDT 2020
Eliminate enum: use const instead, with case-by-case parallel const implementations