Doesn't cover initialization of an empty array

[alkdev]

Public Function MyFun(Optional filters() As (String, String) = New (String, String)() { } ) As Boolean

returns BC30059, as well as when specifying the array size.

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Document Details

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• ID: ae2298bf-325f-ecc2-8c71-43eeb5b843f7
• Version Independent ID: 110c770f-69dc-5379-c0a7-485c55f09e5a
• Content: Constant expression is required - Visual Basic
• Content Source: docs/visual-basic/misc/bc30059.md
• Product: dotnet-visualbasic
• Technology: vb-diagnostics
• GitHub Login: @KathleenDollard
• Microsoft Alias: kdollard

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Associated WorkItem - 486866

[Youssef1313]

An array cannot be constant expression. Optional arguments require a constant expression.

Alternatives:

1. Use ParamArray.
2. Set the default value to Nothing, and inside the function body do If filters Is Nothing Then filters = ....

[alkdev]

@Youssef1313 , Thanks for the hints, but this is not a problem, I solved it. The problem is that the documentation page looks quite poor missing some cases like this.