allowexc(3Tcl)

NAME
     Tcl_AllowExceptions - allow all exceptions in next script evaluation

SYNOPSIS
     #include <tcl.h>

     Tcl_AllowExceptions(interp)

ARGUMENTS
     Tcl_Interp   *interp      (in)      Interpreter in which script will be
                                         evaluated.


DESCRIPTION
     If a script is evaluated at top-level (i.e. no other scripts are pending
     evaluation when the script is invoked), and if the script terminates with
     a completion code other than TCL_OK, TCL_CONTINUE or TCL_RETURN, then Tcl
     normally converts this into a TCL_ERROR return with an appropriate
     message.

     However, if Tcl_AllowExceptions is invoked immediately before calling a
     procedure such as Tcl_Eval, then arbitrary completion codes are permitted
     from the script, and they are returned without modification.  This is
     useful in cases where the caller can deal with exceptions such as
     TCL_BREAK or TCL_CONTINUE in a meaningful way.


KEYWORDS
     continue, break, exception, interpreter