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Tcl_AllowExceptions
Section: Tcl Library Procedures (3) Updated: 7.4 Index
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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 to-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
Index
- NAME
-
- SYNOPSIS
-
- ARGUMENTS
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- DESCRIPTION
-
- KEYWORDS
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