64 lines
1.3 KiB
Plaintext
64 lines
1.3 KiB
Plaintext
== Why is this an issue?
|
|
|
|
Nested control flow statements ``++IF++``, ``++PERFORM++``, ``++EVALUATE++`` and others are often key ingredients in creating
|
|
what's known as "Spaghetti code". This code smell can make your program difficult to understand and maintain.
|
|
|
|
When numerous control structures are placed inside one another, the code becomes a tangled, complex web.
|
|
This significantly reduces the code's readability and maintainability, and it also complicates the testing process.
|
|
|
|
== How to fix it
|
|
|
|
=== Code examples
|
|
|
|
The following example demonstrates the behavior of the rule with the default threshold of 5 levels of nesting:
|
|
|
|
==== Noncompliant code example
|
|
|
|
[source,cobol]
|
|
----
|
|
IF A = 1
|
|
PERFORM
|
|
MOVE A TO B
|
|
PERFORM
|
|
IF B = 1 *> Noncompliant
|
|
MOVE "HI" TO S1
|
|
END-IF
|
|
END-PERFORM
|
|
END-PERFORM
|
|
END-IF.
|
|
----
|
|
|
|
include::../resources.adoc[]
|
|
|
|
ifdef::env-github,rspecator-view[]
|
|
|
|
'''
|
|
== Implementation Specification
|
|
(visible only on this page)
|
|
|
|
include::../message.adoc[]
|
|
|
|
=== Parameters
|
|
|
|
.max
|
|
****
|
|
_Integer_
|
|
|
|
----
|
|
5
|
|
----
|
|
|
|
Maximum allowed control flow statement nesting depth.
|
|
****
|
|
|
|
|
|
include::../highlighting.adoc[]
|
|
|
|
'''
|
|
== Comments And Links
|
|
(visible only on this page)
|
|
|
|
include::../comments-and-links.adoc[]
|
|
|
|
endif::env-github,rspecator-view[]
|