std::is_an_error

returns true if the argument denotes an error-object

Parameters

None

None

load! $buf "some-non-existing-file" on buf.is_an_error: println! error_message_text_of(buf)

OPEN FAILED

std::error_message_text_of	retrieves the error message text of the error object
std::error_category_of	retrieves the error category of the error object
std::error_details_of	retrieves the error details of the error object
std::errno_of	retrieves the errno value of the error object
std::failed_attribute_of	retrieves the attribute* associated with the error object*

std_types::error	error objects are errors
std_types::object	objects are not errors by default
std_types::undefined	the special undefined object is not an error