The BBC and Master Computer Public Domain Library

ADAC Evaluate expression and check for closing bracket

Submitted by Steve Fewell

Description:

This routine calls &9D3B to evaluate the expression contained at the current text
pointer location.
This will either return a String in the SWA, an Integer in the IWA or a Floating-Point
value in the FWA.
Next, it will check the next character found after the expression (returned in X).
If this character was not a closing bracket ')', then generate a "Missing )" error.
Otherwise, all is correct, so increment the text pointer (&1B),
set Y = Return Value Type (A) and exit the routine.

Disassembly for the Evaluate expression and check for Closing bracket routine