0 M ˆÍÌËÊÉl–Ðz¾”Êe¶…6 ¸nõ1hßÈ „ @eÏÇ_‹uÐb &=LV[(a–Ãa¾” jh¥8 ¸Ë—ú˜´oÇ6Ô =head1 NAME Term::ReadLine - Perl interface to various C packages. If no real package is found, substitutes stubs instead of basic functions. =head1 SYNOPSIS use Term::ReadLine; my $term = Term::ReadLine->new('Simple Perl calc'); my $prompt = "Enter your arithmetic expression: "; my $OUT = $term->OUT || \*STDOUT; while ( defined ($_ = $term->readline($prompt)) ) { my $res = eval($_); warn $@ if $@; print $OUT $res, "\n" unless $@; $term->addhistory($_) if /\S/; } =head1 DESCRIPTION This package is just a front end to some other packages. It's a stub to set up a common interface to the various ReadLine implementations found on CPAN (under the C namespace). =head1 Minimal set of supported functions All the supported functions should be called as methods, i.e., either as $term = Term::ReadLine->new('name'); or as $term->addhistory('row'); where $term is a return value of Term::ReadLine-Enew(). =over 12 =item C returns the actual package that executes the commands. Among possible values are C, C, C. =item C returns the handle for subsequent calls to following functions. Argument is the name of the application. Optionally can be followed by two arguments for C and C filehandles. These arguments should be globs. =item C gets an input line, I with actual C support. Trailing newline is removed. Returns C on C. =item C adds the line to the history of input, from where it can be used if the actual C is present. =item C, C return the filehandles for input and output or C if C input and output cannot be used for Perl. =item C If argument is specified, it is an advice on minimal size of line to be included into history. C means do not include anything into history. Returns the old value. =item C returns an array with two strings that give most appropriate names for files for input and output using conventions C<"E$in">, C<"Eout">. The strings returned may not be useful for 3-argument open(). =item Attribs returns a reference to a hash which describes internal configuration of the package. Names of keys in this hash conform to standard conventions with the leading C stripped. =item C Returns a reference to a hash with keys being features present in current implementation. Several optional features are used in the minimal interface: C should be present if the first argument to C is recognized, and C should be present if C method is not dummy. C should be present if lines are put into history automatically (maybe subject to C), and C if C method is not dummy. If C method reports a feature C as present, the method C is not dummy. =back =head1 Additional supported functions Actually C can use some other package, that will support a richer set of commands. All these commands are callable via method interface and have names which conform to standard conventions with the leading C stripped. The stub package included with the perl distribution allows some additional methods: =over 12 =item C makes Tk event loop run when waiting for user input (i.e., during C method). =item C Registers call-backs to wait for user input (i.e., during C method). This supersedes tkRunning. The first call-back registered is the call back for waiting. It is expected that the callback will call the current event loop until there is something waiting to get on the input filehandle. The parameter passed in is the return value of the second call back. The second call-back registered is the call back for registration. The input filehandle (often STDIN, but not neces