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+--- Thread: (can ("definedmove" gives syntax error, but "definedmove" works (/showthread.php?tid=276)
(can ("definedmove" gives syntax error, but "definedmove" works - dale walton - 11-23-2020
I have a game in which individual pieces have an alternative move if they cannot make a standard move.
I attempted a structure of :
(forEach Piece (if (can ("StdMove")) ("StdMove") ("AltMove")))
This produced a syntax error in the "StdMove" define.
However, when the (can ("StdMove")) condition was replaced with an always true, or with an always false condition the program compiled and ran in a consistent manner.
I also tried using a separate define for the (can which used a non-decision version - but that did not help.
See attached file. Note: to compile the file, you will need to change the condition to (= 1 1) or (= 1 2) - as it stands, it does not compile.
I believe that if a move can be made, then it should also work with can. If not, please supply documentation of when and why it cannot be used.
(PS. I also tried to solve this using a construct with "(results" in the condition calculation instead of using a conditional move, but that just blew up with no understandable message, and it presented far more questions of what might be wrong than this method)
RE: (can ("definedmove" gives syntax error, but "definedmove" works - cambolbro - 11-23-2020
Hi,
The syntax is (can Move <MOVE_DESCRIPTION>) as can be seen in Chess:
(can Move ("DoCastle" "RookLeft" E 3 (is Empty (to))))
Regards,
Cameron
RE: (can ("definedmove" gives syntax error, but "definedmove" works - dale walton - 11-23-2020
Thanks. Somehow I missed that... :-) Works now... Just need to add the capture. and probably a noRepeat ;-(