| bc-version |
domain |
keywords |
technologies |
countries |
application-area |
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style |
| spacing |
| not |
| operator |
| aa0003 |
| codecop |
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Exactly one space between not and its argument (CodeCop AA0003)
Description
CodeCop AA0003 requires exactly one space between the not operator and the expression it negates. if not Customer.FindFirst() then … is correct; if not Customer.FindFirst() then … (two spaces) and if notCustomer.FindFirst() then … (zero — which fails parsing anyway) are not. The rule is also the place where uppercase NOT is flagged in combination with CodeCop AA0241 (reserved keywords must be lowercase): if NOT Condition then is doubly wrong.
Best Practice
if not Condition then, if not Customer.IsEmpty() then, exit(not Result). One space, lowercase keyword, no parentheses around the bare boolean.
See sample: single-space-after-not-operator.good.al.
Anti Pattern
if NOT condition then, if not condition then, if !condition then (which is not even AL — ! is not a negation operator in AL). All three either trip AA0003 / AA0241 or fail to compile.
See sample: single-space-after-not-operator.bad.al.
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