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Programming >> Liberty BASIC language >> includesKey not understood
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includesKey not understood
Post by Richard Russell on Apr 26th, 2016, 4:03pm

Liberty BASIC is arguably inconsistent in the way parameters are passed to functions and subs. A function's formal parameters must be enclosed in parentheses but a sub's formal parameters must not be enclosed in parentheses.

If you accidentally put a sub's formal parameters in parentheses LB doesn't detect the problem at 'compile time' but issues the non-obvious "includesKey:" not understood error at runtime:

Code:
    call world b$
    print b$
    end

sub world (byref b$)
    b$ = "Hello world!"
end sub

Fortunately LBB detects the problem at compile time and reports a 'Syntax error' before even trying to run the program.

I don't want to imply that LBB is always better at reporting errors than LB - that is far from the case - but in this specific instance it happens to be.

Richard.