Tcl_AllowExceptions(3) Tcl (7.4) Tcl_AllowExceptions(3)
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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.
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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
Page 1 (printed 2/19/99)