Tcl_WrongNumArgs(3)                                           Tcl Library Procedures                                           Tcl_WrongNumArgs(3)

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NAME

       Tcl_WrongNumArgs - generate standard error message for wrong number of arguments

SYNOPSIS

       #include <tcl.h>

       Tcl_WrongNumArgs(interp, objc, objv, message)

ARGUMENTS

       Tcl_Interp interp (in)                Interpreter in which error will be reported: error message gets stored in its result object.

       int objc (in)                         Number of leading arguments from objv to include in error message.

       Tcl_Obj *const objv[] (in)            Arguments to command that had the wrong number of arguments.

       const char *message (in)              Additional  error  information  to print after leading arguments from objv.  This typically gives the
                                             acceptable syntax of the command.  This argument may be NULL.
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DESCRIPTION

       Tcl_WrongNumArgs is a utility procedure that is invoked by command procedures when they discover that they have received the  wrong  number
       of  arguments.  Tcl_WrongNumArgs generates a standard error message and stores it in the result object of interp.  The message includes the
       objc initial elements of objv plus message.  For example, if objv consists of the values foo and bar, objc is 1, and message  is  "fileName
       count" then interp's result object will be set to the following string:
              wrong # args: should be "foo fileName count"
       If objc is 2, the result will be set to the following string:
              wrong # args: should be "foo bar fileName count"
       Objc is usually 1, but may be 2 or more for commands like string and the Tk widget commands, which use the first argument as a subcommand.

       Some  of the objects in the objv array may be abbreviations for a subcommand.  The command Tcl_GetIndexFromObj will convert the abbreviated
       string object into an indexObject.  If an error occurs in the parsing of the subcommand we would like  to  use  the  full  subcommand  name
       rather  than  the  abbreviation.   If the Tcl_WrongNumArgs command finds any indexObjects in the objv array it will use the full subcommand
       name in the error message instead of the abbreviated name that was originally passed in.  Using the above example, let us assume  that  bar
       is actually an abbreviation for barfly and the object is now an indexObject because it was passed to Tcl_GetIndexFromObj.  In this case the
       error message would be:
              wrong # args: should be "foo barfly fileName count"

SEE ALSO

       Tcl_GetIndexFromObj

KEYWORDS

       command, error message, wrong number of arguments

Tcl                                                                     8.0                                                    Tcl_WrongNumArgs(3)