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using System.Collections.Immutable;
using System.Linq;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.Diagnostics;
namespace Godot.SourceGenerators
{
[DiagnosticAnalyzer(LanguageNames.CSharp)]
public sealed class GlobalClassAnalyzer : DiagnosticAnalyzer
{
public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics
=> ImmutableArray.Create(
Common.GlobalClassMustDeriveFromGodotObjectRule,
Common.GlobalClassMustNotBeGenericRule);
public override void Initialize(AnalysisContext context)
{
context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.None);
context.EnableConcurrentExecution();
context.RegisterSyntaxNodeAction(AnalyzeNode, SyntaxKind.ClassDeclaration);
}
private static void AnalyzeNode(SyntaxNodeAnalysisContext context)
{
// Return if not a type symbol or the type is not a global class.
if (context.ContainingSymbol is not INamedTypeSymbol typeSymbol ||
!typeSymbol.GetAttributes().Any(a => a.AttributeClass?.IsGodotGlobalClassAttribute() ?? false))
return;
if (typeSymbol.IsGenericType)
{
context.ReportDiagnostic(Diagnostic.Create(
Common.GlobalClassMustNotBeGenericRule,
typeSymbol.Locations.FirstLocationWithSourceTreeOrDefault(),
typeSymbol.ToDisplayString()
));
}
if (!typeSymbol.InheritsFrom("GodotSharp", GodotClasses.GodotObject))
{
context.ReportDiagnostic(Diagnostic.Create(
Common.GlobalClassMustDeriveFromGodotObjectRule,
typeSymbol.Locations.FirstLocationWithSourceTreeOrDefault(),
typeSymbol.ToDisplayString()
));
}
}
}
}
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