Tcl_AllowExceptions(3) Tcl Library Procedures Tcl_AllowExceptions(3)
NAME
Tcl_AllowExceptions - allow all exceptions in next script evaluation
SYNOPSIS
#include <tcl.h>
Tcl_AllowExceptions(interp)
ARGUMENTS
Interpreter in which script will be evaluated.
DESCRIPTION
If a script is evaluated at top-level (i.e. no other scripts are pend-
ing evaluation when the script is invoked), and if the script termi-
nates with a completion code other than TCL_OK, TCL_ERROR or
TCL_RETURN, then Tcl normally converts this into a TCL_ERROR return
with an appropriate message. The particular script evaluation proce-
dures of Tcl that act in the manner are Tcl_EvalObjEx, Tcl_EvalObjv,
Tcl_Eval, Tcl_EvalEx, Tcl_GlobalEval, Tcl_GlobalEvalObj, Tcl_VarEval
and Tcl_VarEvalVA.
However, if Tcl_AllowExceptions is invoked immediately before calling
one of those a procedures, then arbitrary completion codes are permit-
ted 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
Tcl 7.4 Tcl_AllowExceptions(3)
AllowExc 8.5.4 - Generated Sun Aug 17 14:53:44 CDT 2008