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Navigation: Macros > Macro Language > Compiler Messages > Errors

Loop condition must be a Boolean expression

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This compiler error will occur if the expression that follows a while reserved word is not a boolean expression. The examples below would cause this error to occur:

while n_TokenDate // integer !!!
endwhile
 
while EvalToken(n_TokenDate, 'm'// string !!!
endwhile

Note, however, that what follows the reserved word while can be a complex expression, as long as its result is boolean.

nCurDate = n_TokenDate
while EvalToken(nCurDate,'[m]') == '1'
    inc(nCurDate)
endwhile

In the above example, the loop runs until the evaluation of the token [m] on that date no longer translates into the string '1' (ie. it is no longer in January).

 


Topic 109016, last updated on 18-Apr-2020