private static ConstructorInfo FindConstructor(
Type type,
ImmutableArray <TypedConstant> symbolConstructorArguments)
{
var constructors = type.GetConstructors();
foreach (var constructor in constructors)
{
var runtimeParameters = constructor.GetParameters();
if (runtimeParameters.Length != symbolConstructorArguments.Length)
{
continue;
}
var parametersMatched = true;
for (var index = 0; index < runtimeParameters.Length; index++)
{
var runtimeParameter = runtimeParameters[index].ParameterType;
if (symbolConstructorArguments[index].Kind == TypedConstantKind.Array &&
runtimeParameter.IsArray)
{
var arrayType = (IArrayTypeSymbol)symbolConstructorArguments[index].Type;
if (!CodeAnalysisSymbolBasedTypeInfo.IsType(
arrayType.ElementType,
runtimeParameter.GetElementType().GetTypeInfo()))
{
parametersMatched = false;
break;
}
}
else
{
if (!CodeAnalysisSymbolBasedTypeInfo.IsType(
symbolConstructorArguments[index].Type,
runtimeParameter.GetTypeInfo()))
{
parametersMatched = false;
break;
}
}
}
if (parametersMatched)
{
return(constructor);
}
}
throw new InvalidOperationException(Resources.FormatCodeAnalysisConstructorNotFound(type.FullName));
}
/// <summary>
/// Gets the sequence of <see cref="Attribute"/>s of type <typeparamref name="TAttribute"/>
/// that are declared on the specified <paramref name="symbol"/>.
/// </summary>
/// <typeparam name="TAttribute">The <see cref="Attribute"/> type.</typeparam>
/// <param name="symbol">The <see cref="ISymbol"/> to find attributes on.</param>
/// <returns></returns>
public static IEnumerable <TAttribute> GetCustomAttributes <TAttribute>(ISymbol symbol)
where TAttribute : Attribute
{
if (symbol == null)
{
throw new ArgumentNullException(nameof(symbol));
}
var attributes = symbol.GetAttributes();
if (attributes.Length > 0)
{
return(attributes
.Where(attribute => CodeAnalysisSymbolBasedTypeInfo.IsType(
attribute.AttributeClass,
typeof(TAttribute).GetTypeInfo()))
.Select(attribute => CreateAttribute <TAttribute>(attribute))
.ToArray());
}
return(Enumerable.Empty <TAttribute>());
}