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_ERROR or
TCL_RETURN, then Tcl normally converts this into a
TCL_ERROR
return with an appropriate message. The particular script evaluation
procedures 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 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