'\"
'\" Generated from file 'namespacex\&.man' by tcllib/doctools with format 'nroff'
'\" Copyright (c) 200? Neil Madden (http://wiki\&.tcl\&.tk/12790)
'\" Copyright (c) 200? Various (http://wiki\&.tcl\&.tk/1489)
'\" Copyright (c) 2010 Documentation, Andreas Kupries
'\"
.TH "namespacex" n 0\&.4 tcllib "Namespace utility commands"
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.BS
.SH NAME
namespacex \- Namespace utility commands
.SH SYNOPSIS
package require \fBTcl 8\&.5 9\fR
.sp
package require \fBnamespacex ?0\&.4?\fR
.sp
\fB::namespacex hook add\fR ?\fInamespace\fR? \fIcmdprefix\fR
.sp
\fB::namespacex hook proc\fR ?\fInamespace\fR? \fIarguments\fR \fIbody\fR
.sp
\fB::namespacex hook on\fR ?\fInamespace\fR? \fIguardcmdprefix\fR \fIactioncmdprefix\fR
.sp
\fB::namespacex hook next\fR \fIarg\fR\&.\&.\&.
.sp
\fB::namespacex import fromns\fR \fIcmdname ?\fInewname\fR \&.\&.\&.?\fR
.sp
\fB::namespacex info allchildren\fR \fInamespace\fR
.sp
\fB::namespacex info allvars\fR \fInamespace\fR
.sp
\fB::namespacex normalize\fR \fInamespace\fR
.sp
\fB::namespacex info vars\fR \fInamespace\fR ?\fIpattern\fR?
.sp
\fB::namespacex state get\fR \fInamespace\fR
.sp
\fB::namespacex state set\fR \fInamespace\fR \fIdict\fR
.sp
\fB::namespacex state drop\fR \fInamespace\fR
.sp
\fB::namespacex strip\fR \fIprefix\fR \fInamespaces\fR
.sp
.BE
.SH DESCRIPTION
This package provides a number of utility commands for working with
namespaces\&.
The commands fall into four categories:
.IP [1]
Hook commands provide and manipulate a chain of commands which
replaces the single regular \fBnamespace unknown\fR handler\&.
.IP [2]
An import command provides the ability to import any command
from another namespace\&.
.IP [3]
Information commands allow querying of variables and child
namespaces\&.
.IP [4]
State commands provide a means to serialize variable values in
a namespace\&.
.PP
.SH COMMANDS
.TP
\fB::namespacex hook add\fR ?\fInamespace\fR? \fIcmdprefix\fR
Adds the \fIcmdprefix\fR to the chain of unknown command handlers that
are invoked when the \fInamespace\fR would otherwise invoke its
unknown handler\&.
If \fInamespace\fR is not specified, then \fIcmdprefix\fR is added to
the chain of handlers for the namespace of the caller\&.
.sp
The chain of \fIcmdprefix\fR are executed in reverse order of
addition, \fIi\&.e\&.\fR the most recently added \fIcmdprefix\fR is
executed first\&.
When executed, \fIcmdprefix\fR has additional arguments appended to it
as would any namespace unknown handler\&.
.TP
\fB::namespacex hook proc\fR ?\fInamespace\fR? \fIarguments\fR \fIbody\fR
Adds an anonymous procedure to the chain of namespace unknown handlers
for the \fInamespace\fR\&.
.sp
If \fInamespace\fR is not specified, then the handler is added
to the chain of handlers for the namespace of the caller\&.
.sp
The \fIarguments\fR and \fIbody\fR are specified as for the
core \fBproc\fR command\&.
.TP
\fB::namespacex hook on\fR ?\fInamespace\fR? \fIguardcmdprefix\fR \fIactioncmdprefix\fR
Adds a guarded action to the chain of namespace unknown handlers for
the \fInamespace\fR\&.
.sp
If \fInamespace\fR is not specified, then the handler is added
to the chain of handlers for the namespace of the caller\&.
.sp
The \fIguardcmdprefix\fR is executed first\&. If it returns a
value that can be interpreted as false, then the next unknown hander
in the chain is executed\&. Otherwise, \fIactioncmdprefix\fR is executed
and the return value of the handler is the value returned by
\fIactioncmdprefix\fR\&.
.sp
When executed, both \fIguardcmdprefix\fR and
\fIactioncmdprefix\fR have the same additional arguments appended as
for any namespace unknown handler\&.
.TP
\fB::namespacex hook next\fR \fIarg\fR\&.\&.\&.
This command is available to namespace hooks to execute the next hook
in the chain of handlers for the namespace\&.
.TP
\fB::namespacex import fromns\fR \fIcmdname ?\fInewname\fR \&.\&.\&.?\fR
Imports the command \fIcmdname\fR from the \fIfromns\fR namespace into
the namespace of the caller\&.
The \fIcmdname\fR command is imported even if the \fIfromns\fR did not
originally export the command\&.
.sp
If \fInewname\fR is specified, then the imported command will
be known by that name\&. Otherwise, the command retains is original name
as given by \fIcmdname\fR\&.
.sp
Additional pairs of \fIcmdname\fR / \fInewname\fR arguments may
also be specified\&.
.TP
\fB::namespacex info allchildren\fR \fInamespace\fR
Returns a list containing the names of all child namespaces in the
specified \fInamespace\fR and its children\&. The names are all fully
qualified\&.
.TP
\fB::namespacex info allvars\fR \fInamespace\fR
Returns a list containing the names of all variables in the specified
\fInamespace\fR and its children\&. The names are all given relative to
\fInamespace\fR, and \fInot\fR fully qualified\&.
.TP
\fB::namespacex normalize\fR \fInamespace\fR
Returns the absolute name of \fInamespace\fR, which is resolved
relative to the namespace of the caller, with all unneeded colon
characters removed\&.
.TP
\fB::namespacex info vars\fR \fInamespace\fR ?\fIpattern\fR?
Returns a list containing the names of all variables in
the specified \fInamespace\fR\&.
If the \fIpattern\fR argument is specified, then only variables
matching \fIpattern\fR are returned\&. Matching is determined using the
same rules as for \fBstring match\fR\&.
.TP
\fB::namespacex state get\fR \fInamespace\fR
Returns a dictionary holding the names and values of all variables in
the specified \fInamespace\fR and its child namespaces\&.
.sp
Note that the names are all relative to \fInamespace\fR, and
\fInot\fR fully qualified\&.
.TP
\fB::namespacex state set\fR \fInamespace\fR \fIdict\fR
Takes a dictionary holding the names and values for a set of variables
and replaces the current state of the specified \fInamespace\fR and
its child namespaces with this state\&.
The result of the command is the empty string\&.
.TP
\fB::namespacex state drop\fR \fInamespace\fR
Unsets all variables in the specified \fInamespace\fR and its child
namespaces\&.
The result of the command is the empty string\&.
.TP
\fB::namespacex strip\fR \fIprefix\fR \fInamespaces\fR
Each item in \fInamespaces\fR must be the absolute normalized name of
a child namespace of namespace \fIprefix\fR\&.
Returns the corresponding list of relative names of child namespaces\&.
.PP
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems\&.
Please report such in the category \fInamespacex\fR of the
\fITcllib Trackers\fR [http://core\&.tcl\&.tk/tcllib/reportlist]\&.
Please also report any ideas for enhancements you may have for either
package and/or documentation\&.
.PP
When proposing code changes, please provide \fIunified diffs\fR,
i\&.e the output of \fBdiff -u\fR\&.
.PP
Note further that \fIattachments\fR are strongly preferred over
inlined patches\&. Attachments can be made by going to the \fBEdit\fR
form of the ticket immediately after its creation, and then using the
left-most button in the secondary navigation bar\&.
.SH KEYWORDS
extended namespace, info, namespace unknown, namespace utilities, state (de)serialization, unknown hooking, utilities
.SH COPYRIGHT
.nf
Copyright (c) 200? Neil Madden (http://wiki\&.tcl\&.tk/12790)
Copyright (c) 200? Various (http://wiki\&.tcl\&.tk/1489)
Copyright (c) 2010 Documentation, Andreas Kupries

.fi