💡📝H. G. Muller wrote on Mon, Dec 28, 2020 08:48 PM UTC:
OK, thanks. This will make life easier, as indeed I would otherwise have had to break from several levels of subroutines.
Some explanation: the error message was from my own parsing routine. My code works by comparing the input move to all legal moves generated in the position before the move, and it needs a complete description of the move to do that. (Not only the basic move, but also optional freedrops or suicides that occur as (possibly mandatory) side effects.) So I don't rely on move parsing as it occurs when you feed a move primitive to GC through a MOVE: prefix, as this would also change the position, but wrote my own parser that extracts all square coordinates and piece labels from all primitives. Which again is called from another 'do everything' subroutine so that users only have to put a single subroutine call in the Post-Move sections. So if the parser doesn't see a hyphen in a move primitive, it exits through die without any of the primitives having been fed to GC.
OK, thanks. This will make life easier, as indeed I would otherwise have had to break from several levels of subroutines.
Some explanation: the error message was from my own parsing routine. My code works by comparing the input move to all legal moves generated in the position before the move, and it needs a complete description of the move to do that. (Not only the basic move, but also optional freedrops or suicides that occur as (possibly mandatory) side effects.) So I don't rely on move parsing as it occurs when you feed a move primitive to GC through a MOVE: prefix, as this would also change the position, but wrote my own parser that extracts all square coordinates and piece labels from all primitives. Which again is called from another 'do everything' subroutine so that users only have to put a single subroutine call in the Post-Move sections. So if the parser doesn't see a hyphen in a move primitive, it exits through die without any of the primitives having been fed to GC.