17 The STREAM package

stream-line-column

Generic Function

Summary

Returns the column number where the next character will be written.

Package

stream

Signature

stream-line-column stream => column

Arguments

stream: A stream.

Values

column: An integer.

Description

The generic functionstream-line-column returns the column number where the next character will be written from stream, ornil if this is not meaningful for the stream. This function is used in the implementation ofprint and theformat ~t directive. A method for this function must be defined for every character output stream class that is defined, although at its simplest it may be defined to always returnnil.