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Text File | 1993-10-26 | 6.9 KB | 140 lines | [TEXT/$Tcl] |
-
- info option ?arg arg ...?
-
-
- DESCRIPTION
- This command provides information about various internals of
- the Tcl interpreter. The legal option's (which may be
- abbreviated) are:
-
- info args procname
- Returns a list containing the names of the arguments to
- procedure procname, in order. Procname must be the
- name of a Tcl command procedure.
-
- info body procname
- Returns the body of procedure procname. Procname must
- be the name of a Tcl command procedure.
-
- info cmdcount
- Returns a count of the total number of commands that
- have been invoked in this interpreter.
-
- info commands ?pattern?
- If pattern isn't specified, returns a list of names of
- all the Tcl commands, including both the built-in com-
- mands written in C and the command procedures defined
- using the proc command. If pattern is specified, only
- those names matching pattern are returned. Matching is
- determined using the same rules as for string match.
-
- info complete command
- Returns 1 if command is a complete Tcl command in the
- sense of having no unclosed quotes, braces, brackets or
- array element names, If the command doesn't appear to
- be complete then 0 is returned. This command is typi-
- cally used in line-oriented input environments to allow
- users to type in commands that span multiple lines; if
- the command isn't complete, the script can delay
- evaluating it until additional lines have been typed to
- complete the command.
-
- info default procname arg varname
- Procname must be the name of a Tcl command procedure
- and arg must be the name of an argument to that pro-
- cedure. If arg doesn't have a default value then the
- command returns 0. Otherwise it returns 1 and places
- the default value of arg into variable varname.
-
- info exists varName
- Returns 1 if the variable named varName exists in the
- current context (either as a global or local variable),
- returns 0 otherwise.
-
- info globals ?pattern?
- If pattern isn't specified, returns a list of all the
- names of currently-defined global variables. If pat-
- tern is specified, only those names matching pattern
- are returned. Matching is determined using the same
- rules as for string match.
-
- info level ?number?
- If number is not specified, this command returns a
- number giving the stack level of the invoking pro-
- cedure, or 0 if the command is invoked at top-level.
- If number is specified, then the result is a list con-
- sisting of the name and arguments for the procedure
- call at level number on the stack. If number is posi-
- tive then it selects a particular stack level (1 refers
- to the top-most active procedure, 2 to the procedure it
- called, and so on); otherwise it gives a level relative
- to the current level (0 refers to the current pro-
- cedure, -1 to its caller, and so on). See the uplevel
- command for more information on what stack levels mean.
-
- info library
- Returns the name of the library directory in which
- standard Tcl scripts are stored. The default value for
- the library is compiled into Tcl, but it may be over-
- ridden by setting the TCL_LIBRARY environment variable.
- If there is no TCL_LIBRARY variable and no compiled-in
- value then and error is generated. See the library
- manual entry for details of the facilities provided by
- the Tcl script library. Normally each application will
- have its own application-specific script library in
- addition to the Tcl script library; I suggest that
- each application set a global variable with a name like
- $app_library (where app is the application's name) to
- hold the location of that application's library direc-
- tory.
-
- info locals ?pattern?
- If pattern isn't specified, returns a list of all the
- names of currently-defined local variables, including
- arguments to the current procedure, if any. Variables
- defined with the global and upvar commands will not be
- returned. If pattern is specified, only those names
- matching pattern are returned. Matching is determined
- using the same rules as for string match.
-
- info patchlevel
- Returns a decimal integer giving the current patch
- level for Tcl. The patch level is incremented for each
- new release or patch, and it uniquely identifies an
- official version of Tcl.
-
- info procs ?pattern?
- If pattern isn't specified, returns a list of all the
- names of Tcl command procedures. If pattern is speci-
- fied, only those names matching pattern are returned.
- Matching is determined using the same rules as for
- string match.
-
- info script
- If a Tcl script file is currently being evaluated (i.e.
- there is a call to Tcl_EvalFile active or there is an
- active invocation of the source command), then this
- command returns the name of the innermost file being
- processed. Otherwise the command returns an empty
- string.
-
- info tclversion
- Returns the version number for this version of Tcl in
- the form x.y, where changes to x represent major
- changes with probable incompatibilities and changes to
- y represent small enhancements and bug fixes that
- retain backward compatibility.
-
- info vars ?pattern?
- If pattern isn't specified, returns a list of all the
- names of currently-visible variables, including both
- locals and currently-visible globals. If pattern is
- specified, only those names matching pattern are
- returned. Matching is determined using the same rules
- as for string match.
-
-
- KEYWORDS
- command, information, interpreter, level, procedure, vari-
- able
-