|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#nullable disable
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Shared.Extensions;
using System;
using System.Threading;
namespace Microsoft.CodeAnalysis.CSharp;
internal static class InternalExtensions
{
public static ITypeSymbol DetermineParameterType(
this ArgumentSyntax argument,
SemanticModel semanticModel,
CancellationToken cancellationToken)
{
return DetermineParameterType(argument.Expression, semanticModel, cancellationToken);
}
public static ITypeSymbol DetermineParameterType(ExpressionSyntax expression, SemanticModel semanticModel, CancellationToken cancellationToken)
{
if (expression is DeclarationExpressionSyntax decl)
{
var typeInfo = semanticModel.GetTypeInfo(decl.Type, cancellationToken);
return typeInfo.Type?.IsErrorType() == false ? typeInfo.Type : semanticModel.Compilation.ObjectType;
}
else
{
// If a parameter appears to have a void return type, then just use 'object'
// instead.
var typeInfo = semanticModel.GetTypeInfo(expression, cancellationToken);
if (typeInfo.Type != null && typeInfo.Type.SpecialType == SpecialType.System_Void)
return semanticModel.Compilation.ObjectType;
}
return semanticModel.GetType(expression, cancellationToken);
}
}
|