50 lines
1.1 KiB
Plaintext
50 lines
1.1 KiB
Plaintext
This rule applies whenever an ``IF`` statement is followed by one or more ``ELSEIF`` statements; the final ``ELSEIF`` should be followed by an ``ELSE`` statement.
|
|
The requirement for a final ``ELSE`` statement is defensive programming.
|
|
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 ``OTHER`` clause in a ``SELECT`` statement.
|
|
|
|
== Noncompliant Code Example
|
|
|
|
----
|
|
C IF RESULT = 0
|
|
C ...
|
|
C ELSEIF RESULT > 0
|
|
C ...
|
|
C ENDIF
|
|
----
|
|
|
|
----
|
|
/free
|
|
if result = 0;
|
|
...
|
|
elseif result > 0;
|
|
...
|
|
endif;
|
|
/end-free
|
|
----
|
|
|
|
== Compliant Solution
|
|
|
|
----
|
|
C IF RESULT = 0
|
|
C ...
|
|
C ELSEIF RESULT > 0
|
|
C ...
|
|
C ELSE
|
|
C EXSR ERRO
|
|
C ENDIF
|
|
----
|
|
|
|
----
|
|
/free
|
|
if result = 0;
|
|
...
|
|
elseif result > 0;
|
|
...
|
|
else;
|
|
exsr ERR0;
|
|
endif;
|
|
/end-free
|
|
----
|
|
|
|
include::../see.adoc[]
|