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Source: AL0040UseAttributeExtensionsAnalyzer.cs

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Description

Direct access to AttributeData.ConstructorArguments[i].Value is verbose and error-prone. ANcpLua.Roslyn.Utilities provides typed extraction extensions.

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Bad Code

using Microsoft.CodeAnalysis;

// Verbose attribute argument access
var typeArg = (ITypeSymbol?)attr.ConstructorArguments[0].Value;
var name = attr.NamedArguments.FirstOrDefault(x => x.Key == "Name").Value.Value as string;

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Good Code

using ANcpLua.Roslyn.Utilities;

// Type-safe extraction
var typeArg = attr.GetConstructorArgument<ITypeSymbol>(0);
var name = attr.GetNamedArgument<string>("Name");

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Properties

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

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Configuration

dotnet_diagnostic.AL0040.severity = warning

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Notes

  • GetConstructorArgument<T>(index) - type-safe positional argument extraction
  • GetNamedArgument<T>(name) - type-safe named argument extraction
  • Handles null and type conversion gracefully
  • Common pattern in Roslyn analyzer development