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bcquality/microsoft/knowledge/style/single-space-after-not-operator.md
Jesper Schulz-Wedde 2b5550c346
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Improve partner onboarding and documentation navigation (#174) 
Lead with a complete plugin quick start and add task-oriented usage, troubleshooting, customization, and contribution guides. Preserve the broader plugin framing, correct conflicting contract guidance, support Agents folder reviews, and align repository validation. Convert existing sample references to clickable links without changing knowledge rules.

Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
2026-09-09 17:31:03 +02:00

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bc-version domain keywords technologies countries application-area
all
style
spacing
not
operator
aa0003
codecop
al
w1
all

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.