rspec/rules/S1862/swift/rule.adoc
Fred Tingaud 51369b610e
Make sure that includes are always surrounded by empty lines (#2270)
When an include is not surrounded by empty lines, its content is inlined
on the same line as the adjacent content. That can lead to broken tags
and other display issues.
This PR fixes all such includes and introduces a validation step that
forbids introducing the same problem again.
2023-06-22 10:38:01 +02:00

72 lines
1.4 KiB
Plaintext

== Why is this an issue?
A ``++switch++`` and a chain of ``++if++``/``++else if++`` statements is evaluated from top to bottom. At most, only one branch will be executed: the first one with a condition that evaluates to ``++true++``.
Therefore, duplicating a condition automatically leads to dead code. Usually, this is due to a copy/paste error. At best, it's simply dead code and at worst, it's a bug that is likely to induce further bugs as the code is maintained, and obviously it could lead to unexpected behavior.
=== Noncompliant code example
[source,swift]
----
if param == 1 {
openWindow()
} else if param == 2 {
closeWindow()
} else if param == 1 { // Noncompliant
moveWindowToTheBackground()
}
switch i {
case 1:
//...
case 3:
//...
case 1: // Noncompliant
//...
default:
// ...
}
----
=== Compliant solution
[source,swift]
----
if param == 1 {
openWindow()
} else if param == 2 {
closeWindow()
} else if param == 3 {
moveWindowToTheBackground()
}
switch i {
case 1:
//...
case 3:
//...
default:
// ...
}
----
ifdef::env-github,rspecator-view[]
'''
== Implementation Specification
(visible only on this page)
include::../message.adoc[]
include::../highlighting.adoc[]
'''
== Comments And Links
(visible only on this page)
include::../comments-and-links.adoc[]
endif::env-github,rspecator-view[]