Missing state checks

[asmaloney]

According to the ACT-R manual, there are 5 checks one can do on a buffer (ACT-R manual pg. 229-230):

• buffer empty
• buffer full
• buffer failure
• buffer requested
• buffer unrequested

And three checks one can do on a module:

• state free
• state busy
• state error

From my reading of the python_actr code, it looks like only two buffer checks (empty & full) and two module checks (busy & error - only on some modules) are supported.

Am I reading the code correctly? If so, does anyone know why the others were omitted?

(Context: asmaloney/gactar#221 )