using System.Collections.Immutable;
using Microsoft.CodeAnalysis.CSharp.Emit;
using Microsoft.CodeAnalysis.CSharp.Symbols;
using Microsoft.CodeAnalysis.PooledObjects;
using Microsoft.CodeAnalysis.Symbols;

namespace Microsoft.CodeAnalysis.CSharp;

internal sealed class IteratorConstructor : SynthesizedInstanceConstructor, ISynthesizedMethodBodyImplementationSymbol, ISymbolInternal
{
	private readonly ImmutableArray<ParameterSymbol> _parameters;

	public override ImmutableArray<ParameterSymbol> Parameters => _parameters;

	public override Accessibility DeclaredAccessibility => (Accessibility)6;

	IMethodSymbolInternal ISynthesizedMethodBodyImplementationSymbol.Method => ((ISynthesizedMethodBodyImplementationSymbol)ContainingSymbol).Method;

	bool ISynthesizedMethodBodyImplementationSymbol.HasMethodBodyDependency => false;

	internal IteratorConstructor(StateMachineTypeSymbol container)
		: base(container)
	{
		NamedTypeSymbol specialType = container.DeclaringCompilation.GetSpecialType((SpecialType)13);
		_parameters = ImmutableArray.Create(SynthesizedParameterSymbol.Create(this, TypeWithAnnotations.Create(specialType), 0, (RefKind)0, GeneratedNames.MakeStateMachineStateFieldName(), (ScopedKind)0));
	}

	internal override void AddSynthesizedAttributes(PEModuleBuilder moduleBuilder, ref ArrayBuilder<SynthesizedAttributeData> attributes)
	{
		base.AddSynthesizedAttributes(moduleBuilder, ref attributes);
		CSharpCompilation declaringCompilation = DeclaringCompilation;
		Symbol.AddSynthesizedAttribute(ref attributes, declaringCompilation.TrySynthesizeAttribute((WellKnownMember)70));
	}
}