ObjectVariableNotSet

Warns about assignments that appear to be assigning an object reference without the 'Set' keyword.


Inspection type: CodeQualityIssues

Default severity: Error

Reasoning

Omitting the 'Set' keyword will Let-coerce the right-hand side (RHS) of the assignment expression. If the RHS is an object variable, then the assignment is implicitly assigning to that object's default member, which may raise run-time error 91 at run-time

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.
  • IgnoreInModule: Adds an '@IgnoreModule annotation to ignore a inspection results for a specific inspection inside a whole module. Applicable to all inspections whose results can be annotated in a module.
  • UseSetKeywordForObjectAssignment: Introduces a 'Set' keyword for what appears to be a suspicious or malformed object reference assignment.

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()
    Dim foo As Object
    foo = New Collection
    ' ...
End Sub

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