/// <summary>
/// Check if the attribute is of the expected type.
/// </summary>
/// <param name="attribute">The <see cref="AttributeSyntax"/>.</param>
/// <param name="expected">The expected type.</param>
/// <param name="semanticModel">The <see cref="SemanticModel"/>.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
/// <returns>True if the attribute is of the expected type.</returns>
public static bool IsType(AttributeSyntax attribute, QualifiedType expected, SemanticModel semanticModel, CancellationToken cancellationToken)
{
if (attribute == null)
{
return(false);
}
if (attribute.Name is SimpleNameSyntax simpleName)
{
if (!IsMatch(simpleName, expected) &&
!AliasWalker.TryGet(attribute.SyntaxTree, simpleName.Identifier.ValueText, out _))
{
return(false);
}
}
else if (attribute.Name is QualifiedNameSyntax qualifiedName &&
qualifiedName.Right is SimpleNameSyntax typeName)
{
if (!IsMatch(typeName, expected) &&
!AliasWalker.TryGet(attribute.SyntaxTree, typeName.Identifier.ValueText, out _))
{
return(false);
}
}
return(semanticModel.TryGetType(attribute, cancellationToken, out var attributeType) &&
attributeType == expected);
bool IsMatch(SimpleNameSyntax sn, QualifiedType qt)
{
return(sn.Identifier.ValueText == qt.Type ||
qt.Type.IsParts(sn.Identifier.ValueText, "Attribute"));
}
}
/// <summary>
/// Try getting the <see cref="IMethodSymbol"/> for the node.
/// Gets the semantic model for the tree if the node is not in the tree corresponding to <paramref name="semanticModel"/>.
/// </summary>
/// <param name="semanticModel">The <see cref="SemanticModel"/>.</param>
/// <param name="node">The <see cref="ObjectCreationExpressionSyntax"/>.</param>
/// <param name="expected">The expected method.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
/// <param name="symbol">The symbol if found.</param>
/// <returns>True if a symbol was found.</returns>
public static bool TryGetSymbol(this SemanticModel semanticModel, ObjectCreationExpressionSyntax node, QualifiedType expected, CancellationToken cancellationToken, out IMethodSymbol symbol)
{
if (node.Type is SimpleNameSyntax typeName &&
(typeName.Identifier.ValueText == expected.Type ||
AliasWalker.TryGet(node.SyntaxTree, typeName.Identifier.ValueText, out _)))
{
symbol = semanticModel.GetSymbolSafe(node, cancellationToken);
return(symbol?.ContainingType == expected);
}
if (node.Type is QualifiedNameSyntax qualifiedName &&
qualifiedName.Right.Identifier.ValueText == expected.Type)
{
symbol = semanticModel.GetSymbolSafe(node, cancellationToken);
return(symbol?.ContainingType == expected);
}
symbol = null;
return(false);
}
/// <summary>
/// Try getting the <see cref="IMethodSymbol"/> for the node.
/// Gets the semantic model for the tree if the node is not in the tree corresponding to <paramref name="semanticModel"/>.
/// </summary>
/// <param name="semanticModel">The <see cref="SemanticModel"/>.</param>
/// <param name="node">The <see cref="ObjectCreationExpressionSyntax"/>.</param>
/// <param name="expected">The expected method.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
/// <param name="symbol">The symbol if found.</param>
/// <returns>True if a symbol was found.</returns>
public static bool TryGetSymbol(this SemanticModel semanticModel, ObjectCreationExpressionSyntax node, QualifiedType expected, CancellationToken cancellationToken, [NotNullWhen(true)] out IMethodSymbol?symbol)
{
if (semanticModel is null)
{
throw new System.ArgumentNullException(nameof(semanticModel));
}
if (expected is null)
{
throw new System.ArgumentNullException(nameof(expected));
}
if (node is null)
{
throw new System.ArgumentNullException(nameof(node));
}
if (node.Type is SimpleNameSyntax typeName &&
(typeName.Identifier.ValueText == expected.Type ||
AliasWalker.TryGet(node.SyntaxTree, typeName.Identifier.ValueText, out _)))
{
symbol = semanticModel.GetSymbolSafe(node, cancellationToken);
return(symbol is { } &&
