---
name: "AllowExc"
section: "3tcl"
platform: "linux"
package: "tcl8.3-doc"
version: "8.3.5-13"
release: "Debian 5.0 (Lenny)"
platforms: ["linux"]
url: "https://new.carta.tech/AllowExc/3tcl"
---

# AllowExc(3tcl)

allow all exceptions in next script evaluation

```

```

## 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\_CONTINUE or TCL\_RETURN, then Tcl normally converts this into a TCL\_ERROR return with an appropriate message.

However, if **Tcl\_AllowExceptions** is invoked immediately before calling a procedure such as **Tcl\_Eval**, 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