52 lines
1.2 KiB
Plaintext
52 lines
1.2 KiB
Plaintext
== Why is this an issue?
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Calling the ``+``, ``++-++``, ``++~++`` or ``++NOT++`` prefix operator twice does nothing: the second invocation undoes the first. Such mistakes are typically caused by accidentally double-tapping the key in question without noticing.
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Either this is a bug, if the operator was actually meant to be called once, or misleading if done on purpose.
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=== Noncompliant code example
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[source,sql]
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----
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DECLARE @v1 INTEGER = 1
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DECLARE @v2 INTEGER = - - -@v1 -- Noncompliant; -@v1 should be used instead
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DECLARE @v3 INTEGER = ~~~@v1 -- Noncompliant; ~@v1 should be used instead
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DECLARE @v4 INTEGER = ++@v1 -- Noncompliant; operators are useless here
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IF NOT NOT @v1 <> @v2 -- Noncompliant
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BEGIN
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PRINT @msg
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END
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----
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=== Compliant solution
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[source,sql]
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----
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DECLARE @v1 INTEGER = 1
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DECLARE @v2 INTEGER = -@v1
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DECLARE @v3 INTEGER = ~@v1
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DECLARE @v4 INTEGER = @v1
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IF @v1 <> @v2
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BEGIN
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PRINT @msg
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END
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----
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ifdef::env-github,rspecator-view[]
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'''
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== Implementation Specification
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(visible only on this page)
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include::../message.adoc[]
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'''
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== Comments And Links
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(visible only on this page)
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include::../comments-and-links.adoc[]
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endif::env-github,rspecator-view[]
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