FunctionReturnValueDiscarded

Warns when a user function's return value is not used at a call site.


New This feature is currently only available in pre-release builds (or the xmldoc asset doesn’t yet exist on master!).

Inspection type: CodeQualityIssues

Default severity: Warning

Reasoning

A 'Function' procedure normally means its return value to be captured and consumed by the calling code

Quick-Fixes

The following quick-fixes are available for this inspection:

  • IgnoreOnce: Adds an '@Ignore annotation to ignore a specific inspection result. Applicable to all inspections whose results can be annotated in a module.

Examples

Each example is a self-contained MCVE showing the feature in a single specific scenario.

Standard Module
Named Module1 by default, these are general-purpose standard procedural modules.
Class Module
Named Class1 by default, these modules define the default interface for an object of that type.
Predeclared Class
A class module with its VB_PredeclaredId attribute set to True (with or without a @PredeclaredId annotation).
Interface Module
Abstract interfaces are class modules (with or without an @Interface annotation) whose default interface is not a class type intended to be instantiated.
UserForm Module
A predeclared class with a design-time visual designer using the MSForms UI framework.
Document Module
Owned by the host application, these class modules belong to the host document and may handle various events fired by the host application.

The following code should trigger this inspection:

MyModule

Public Sub DoSomething()
    GetFoo ' return value is not captured
End Sub
Private Function GetFoo() As Long
    GetFoo = 42
End Function

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