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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: Copilot App <223556219+Copilot@users.noreply.github.com>
26 lines
1.3 KiB
Markdown
26 lines
1.3 KiB
Markdown
---
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bc-version: [all]
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domain: style
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keywords: [spacing, not, operator, aa0003, codecop]
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technologies: [al]
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countries: [w1]
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application-area: [all]
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---
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# Exactly one space between `not` and its argument (CodeCop AA0003)
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## Description
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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.
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## Best Practice
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`if not Condition then`, `if not Customer.IsEmpty() then`, `exit(not Result)`. One space, lowercase keyword, no parentheses around the bare boolean.
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See sample: [`single-space-after-not-operator.good.al`](single-space-after-not-operator.good.al).
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## Anti Pattern
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`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.
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See sample: [`single-space-after-not-operator.bad.al`](single-space-after-not-operator.bad.al).
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