public static ConditionalMemberCSharpExpression ConditionalProperty(Expression expression, PropertyInfo property)
{
RequiresCanRead(expression, nameof(expression));
ContractUtils.RequiresNotNull(property, nameof(property));
if (!property.CanRead)
{
throw Error.ConditionalAccessRequiresReadableProperty();
}
if (property.GetIndexParameters().Length != 0)
{
throw Error.ConditionalAccessRequiresReadableProperty();
}
if (property.GetGetMethod(true).IsStatic)
{
throw Error.ConditionalAccessRequiresNonStaticMember();
}
var type = expression.Type.GetNonNullReceiverType();
if (!TypeUtils.IsValidInstanceType(property, type))
{
throw LinqError.PropertyNotDefinedForType(property, type);
}
return(ConditionalMemberCSharpExpression.Make(expression, property));
}
public static ConditionalMemberCSharpExpression ConditionalField(Expression expression, FieldInfo field)
{
RequiresCanRead(expression, nameof(expression));
ContractUtils.RequiresNotNull(field, nameof(field));
if (field.IsStatic)
{
throw Error.ConditionalAccessRequiresNonStaticMember();
}
var type = expression.Type.GetNonNullReceiverType();
if (!TypeUtils1.AreReferenceAssignable(field.DeclaringType, type))
{
throw LinqError.FieldInfoNotDefinedForType(field.DeclaringType, field.Name, type);
}
return(ConditionalMemberCSharpExpression.Make(expression, field));
}
