[ Character I/O | The ECLiPSe Built-In Predicates | Reference Manual | Alphabetic Index ]
get(+Stream, ?Ascii)
Reads the next character from the input stream Stream and unifies its ASCII
code with Ascii.
- +Stream
- Integer (stream number) or Atom (reserved or user-defined symbolic stream name).
- ?Ascii
- Integer.
Description
Takes the next character from the open input stream Stream and unifies
its integer ASCII code (in the range 0 to 255) to Ascii. ASCII codes
for the non-printable characters (i.e. control characters) are also
acceptable.
Fail Conditions
Fails if Ascii does not unify with the next character from the buffered
input stream Stream.
Resatisfiable
No.
Exceptions
- (4) instantiation fault
- Stream is not instantiated.
- (5) type error
- Stream is neither an integer nor an atom.
- (5) type error
- Ascii is instantiated, but not to an integer.
- (190) end of file reached
- End of file has been reached.
- (192) illegal stream mode
- Stream is not an input stream.
- (193) illegal stream specification
- Stream is an illegal stream specification.
Examples
Success:
[eclipse]: get(input, 0'a),get(input,97).
> aa
yes.
Fail:
[eclipse]: get(input,98).
> a
no.
Error:
get(Stream,98). (Error 4).
get(input, '98'). (Error 5).
get(10,A). (Error 192).
get(atom,A). (Error 193).
See Also
get / 1, put / 1, put / 2