53 lines
1.3 KiB
Plaintext
53 lines
1.3 KiB
Plaintext
== Why is this an issue?
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This rule applies whenever an ``++if++`` statement is followed by one or more ``++else if++`` statements; the final ``++else if++`` should be followed by an ``++else++`` statement.
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The requirement for a final ``++else++`` statement is defensive programming.
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The ``++else++`` statement should either take appropriate action or contain a suitable comment as to why no action is taken. This is consistent with the requirement to have a final ``++case _++`` clause in a ``++match++``.
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=== Noncompliant code example
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[source,scala]
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----
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if (x == 0) {
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doSomething
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} else if (x == 1) {
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doSomethingElse
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}
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----
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=== Compliant solution
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[source,scala]
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----
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if (x == 0) {
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doSomething
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} else if (x == 1) {
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doSomethingElse
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} else {
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throw new IllegalStateException
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}
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----
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=== Exceptions
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When all branches of an ``++if++``-``++else if++`` end with ``++return++``, ``++break++`` or ``++throw++``, the code that comes after the ``++if++`` implicitly behaves as if it was in an ``++else++`` clause. This rule will therefore ignore that case.
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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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