public static IEnumerable <Attribute> GetAttributes(this ClassDeclarationSyntax classDeclarationSyntax, Type attributeType)
{
foreach (var attribute in classDeclarationSyntax.GetAttributesSyntax(attributeType))
{
yield return(attribute.GetAttribute(attributeType));
}
}
public static ParsedAttribute <T> GetSingleAttribute <T>(this ClassDeclarationSyntax classDeclarationSyntax) where T : Attribute
{
var syntax = classDeclarationSyntax.GetAttributesSyntax <T>().ToArray();
if (syntax.Length != 1)
{
return(null);
}
return(new ParsedAttribute <T>(syntax.Single()));
}
public static ParsedAttribute GetSingleAttribute(this ClassDeclarationSyntax classDeclarationSyntax, Type attributeType)
{
var syntax = classDeclarationSyntax.GetAttributesSyntax(attributeType).ToArray();
if (syntax.Length != 1)
{
return(null);
}
var resultType = typeof(ParsedAttribute <>).MakeGenericType(attributeType);
return((ParsedAttribute)Activator.CreateInstance(resultType, syntax.Single()));
}
public static ParsedAttribute[] GetMultipleAttributes(this ClassDeclarationSyntax classDeclarationSyntax, Type attributeType)
{
var syntax = classDeclarationSyntax.GetAttributesSyntax(attributeType).ToArray();
var resultType = typeof(ParsedAttribute <>).MakeGenericType(attributeType);
var array = Array.CreateInstance(resultType, syntax.Length);
for (int index = 0; index < syntax.Length; index++)
{
var arrayValue = Activator.CreateInstance(resultType, syntax[index]);
array.SetValue(arrayValue, index);
}
return((ParsedAttribute[])array);
}
public static ParsedAttribute <T>[] GetMultipleAttributes <T>(this ClassDeclarationSyntax classDeclarationSyntax) where T : Attribute
{
var syntax = classDeclarationSyntax.GetAttributesSyntax <T>().ToArray();
return(syntax.Select(s => new ParsedAttribute <T>(s)).ToArray());
}
public static IEnumerable <AttributeSyntax> GetAttributesSyntax <T>(this ClassDeclarationSyntax classDeclarationSyntax) where T : Attribute
{
return(classDeclarationSyntax.GetAttributesSyntax(typeof(T)));
}