# Index of exceptions

E
Empty [Cf_seq] | Operation not possible on an empty list.
Error [Cf_regex] | An error parsing the specified string as a regular expression.
Error [Cf_parser.X] | Generic parser error with one positional parameter.
Error [Cf_parser] | Generic parser error with no parameters.
L
Label_error [Cf_tai64] | Input is not a valid TAI64 label
N
No_match [Cf_scan_parser] | An exception provided so that the `cscanf` function (below) can be signaled to transform its answer with the effect that the parser stack is unwound until an alternative production can be matched.
R
Range_error [Cf_tai64] | Result not representable in TAI64 format.