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Unavailable Information

rascal-0.34.0

Synopsis​

Requested information is unavailable at runtime

Types​

data RuntimeException = UnavailableInformation(str message);

Usage​

import Exception; (only needed when UnavailableInformation is used in catch)

Description​

Several datetypes may contain optional information that is not always available:

  • In a datetime value the date or the time may be missing.
  • In a location value, various fields are optional, e.g., port, offset, begin and end.

This exception is thrown when optional information is not available.

Examples​

rascal>$2016-09-14$.hour;
|prompt:///|(0,12,<1,0>,<1,12>): Can not retrieve the hour on a date value
Advice: |https://www.rascal-mpl.org/docs/Rascal/Errors/CompileTimeErrors/UnsupportedOperation|
ok
rascal>someLoc = |home:///abc.txt|;
loc: |home:///abc.txt|
rascal>someLoc.offset;
|prompt:///|(0,7,<1,0>,<1,7>): UnavailableInformation()
    at $shell$(|prompt:///|(0,15,<1,0>,<1,15>))
ok