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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 Tcl_Interp *interp (in) Interpreter in which script will be evalu- ated. ________________________________________________________________________________ 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 nor- mally 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 Tcl 7.4 Tcl_AllowExceptions(3)
NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | KEYWORDS
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