Provided by: nsf_2.3.0-1_amd64 
NAME
nx::current - Return information about the method callstack
SYNOPSIS
current ?option?
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DESCRIPTION
current ?option?
This introspection command provides information about various details, to be identified using
option, on the callstack. The command is invoked from a method body. If option is not provided,
nx::current will default to option object (see below). nx::current operates on the Tcl callstack
and is aware of NX-specific callstack and stackframe details. Except for the options callinglevel
and level, calling nx::current outside an NX object or method will result in an error. option can
be any of the following:
• activelevel returns the actual callstack level which calls into the currently executing
method directly. This activelevel might correspond the callinglevel, but this is not
necessarily the case. The activelevel also includes intermediate calls, such as nx::next
invocations. The level is reported as an absolute level number (# followed by a digit) to
be directly used as the first argument to uplevel or upvar.
• args returns the list of argument values passed into the currently executing method
implementation.
• calledclass returns the name of the class that provides the method implementation to which
the intercepted method call is to be redirected (only available from within filter
methods).
• calledmethod returns the original method name requested by intercepted method call (only
available from within filter methods).
• callingclass returns the name of the class which provides the method implementation calling
into the currently executing method. See also callingobject.
• callinglevel resolves the callstack level of the originating invocation of the currently
executing method implementation. Callstack levels introduced by method interception (e.g.,
filters) and by method combination (nx::next) are ignored. The level is reported as an
absolute level number (# followed by a digit) to be directly used as the first argument to
uplevel or upvar. See also activelevel. If called outside NX, 1 is returned (which is the
default for upvar and uplevel).
• callingobject returns the name of the object which is calling into the currently executing
method. See also callingclass.
• class returns the name of the class providing the currently executing method
implementation. The returned method-providing class may be different to the class of the
current object. If called from within a method implementation provided by the current
object itself, an empty string is returned.
• filterreg returns the object (class) on which the currently executing method was registered
as a filter method (only available from within filter methods).
• isnextcall will return 1, if the currently executing method implementation was invoked via
nx::next; 0 otherwise.
• level will return a number indicating the stack level of the currently executed method or
script, or an empty string when executed outside an NX context (e.g., in a Tcl proc or a
namespace script). The resulting value can be directly passed as level to info level.
• method returns the name of the currently executing method. If an ensemble-method call, the
name of the bottom-most ("leaf") method is returned.
• methodpath returns the combined name of the currently executing method (including all
ensemble levels) in an ensemble-method call. Otherwise, for a regular method call, the
result corresponds to the result of option method.
• nextmethod returns the name of the next most specific method implementation to be called
when invoking nx::next.
• object gives the name of the object on which the currently executing method implementation
is evaluated.
COPYRIGHT
Copyright (c) 2014-16 Stefan Sobernig <stefan.sobernig@wu.ac.at>, Gustaf Neumann <gustaf.neumann@wu.ac.at>; available under the Creative Commons Attribution 3.0 Austria license (CC BY 3.0 AT).
current 2.3.0 nx::current(3nx)