AL0033 - Use ToImmutableArrayOrEmpty()

Replace nullable ToImmutableArray patterns with ToImmutableArrayOrEmpty() extension

Source: AL0033UseToImmutableArrayOrEmptyAnalyzer.cs

Description

The pattern ?.ToImmutableArray() ?? ImmutableArray<T>.Empty is verbose. ANcpLua.Roslyn.Utilities provides ToImmutableArrayOrEmpty() for cleaner conversion.

Bad Code

using System.Collections.Immutable;

// Verbose nullable pattern
var result = items?.ToImmutableArray() ?? ImmutableArray<string>.Empty;

Good Code

using ANcpLua.Roslyn.Utilities;

// Clean extension
var result = items.ToImmutableArrayOrEmpty();

Properties

• Category: Usage
• Severity: Info
• Enabled by default: True
• Code fix available: False

Configuration

dotnet_diagnostic.AL0033.severity = suggestion

Notes

• Handles null input gracefully
• Returns ImmutableArray<T>.Empty for null
• Common pattern in Roslyn analyzer development