16f6c0aecf
Inline adoc files when they are included exactly once. Also fix language tags because this inlining gives us better information on what language the code is written in.
56 lines
1.2 KiB
Plaintext
56 lines
1.2 KiB
Plaintext
== Why is this an issue?
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An intersection type combines multiple types into one. This allows you to add together existing types to get a single type that has all the features you need. However an intersection with a type without members doesn't change the resulting type. In the opposite the usage of ``++any++`` or ``++never++`` as part of an intersection will always results in ``++any++`` or ``++never++`` respectively. This is almost certainly an error.
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=== Noncompliant code example
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[source,javascript]
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----
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function foo(p: MyType & null) { // Noncompliant
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// ...
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}
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function bar(p: MyType & any) { // Noncompliant
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// ...
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}
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----
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=== Compliant solution
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[source,javascript]
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----
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function foo(p: MyType | null) {
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// ...
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}
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// or
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function foo(p: MyType & AnotherType) {
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// ...
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}
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function bar(p: any) {
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// ...
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}
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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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=== Message
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* Remove this type without members or change this type intersection.
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* Simplify this intersection as it always has type ["any" | "never"].
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=== Highlighting
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type without members or full intersection if it has ``++any++`` or ``++never++``
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endif::env-github,rspecator-view[]
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