The bug is pretty straightforward. When the user attempts to combine two or more commands using THEN or a period (for example, GO EAST THEN GO WEST, or GET LAMP. TURN ON LAMP), the game enters an endless loop, executing only the first command over and over. This test code demonstrates the problem simply:
[code]Include Unified Glulx Input by Andrew Plotkin.
Test Chamber is a room.
The lamp is a device in the Test Chamber.
Test me with “get lamp then turn on lamp”.[/code]
This sort of problem is usually well out of my area of expertise, but UGI has become an essential component of a pretty important WIP, so I’m determined to figure it out. Any help at all, or even any insights into the parts of the parser that normally handle concatenated commands, would be profoundly appreciated.
In case this proves hard to fix and you want to slice the Gordian knot, I once did this to stop the player from chaining commands when my game couldn’t handle it:
[code]First after reading a command when the player’s command includes “then”:
say “Sorry, but it looks like you’ve chained more than one command together with the word ‘THEN.’ This game doesn’t support that feature.”;
reject the player’s command.
First after reading a command when the player’s command matches the regular expression “.”:
say “Sorry, but it looks like you’ve chained more than one command together with periods. This game doesn’t support that feature.”;
reject the player’s command.[/code]
And pasting the relevant code back in seems to have fixed the problem! Here’s a fixed version that maybe will work with 6M62. Probably the thing to do would be to make some sort of conditional include that puts the right code in depending on which version of Inform you’re using, but, well, zarf can handle that if he wants. Unified Glulx Input Debug.i7x (119 KB)