Tcl\_AllowExceptions(3) Tcl Library Procedures Tcl\_AllowExceptions(3)

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# [NAME](#NAME)

Tcl\_AllowExceptions - allow all exceptions in next script evaluation

# [SYNOPSIS](#SYNOPSIS)

```
#include <tcl.h>

Tcl_AllowExceptions(interp)
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# [ARGUMENTS](#ARGUMENTS)

Tcl\_Interp *\*interp* (in)

Interpreter in which script will be evaluated.

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# [DESCRIPTION](#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** and **Tcl\_VarEval**.

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](#KEYWORDS)

continue, break, exception, interpreter

7.4 Tcl

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Document: Tcl_AllowExceptions(3) from tcl 9.1.0-r1 (Chainguard OS)
Source: https://downloads.sourceforge.net/project/tcl/Tcl/9.1.0/tcl9.1.0-src.tar.gz