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tcl_saveresult

Tcl_SaveResult(3TCL)					      Tcl Library Procedures					      Tcl_SaveResult(3TCL)

__________________________________________________________________________________________________________________________________________________

NAME

       Tcl_SaveResult, Tcl_RestoreResult, Tcl_DiscardResult - save and restore an interpreter's result

SYNOPSIS

       #include <tcl.h>

       Tcl_SaveResult(interp, statePtr)

       Tcl_RestoreResult(interp, statePtr)

       Tcl_DiscardResult(statePtr)

ARGUMENTS

       Tcl_Interp	 *interp    (in)      Interpreter for which state should be saved.

       Tcl_SavedResult	 *statePtr  (in)      Pointer to location where interpreter result should be saved or restored.
_________________________________________________________________

DESCRIPTION

       These  routines	allows	a  C  procedure  to  take  a snapshot of the current interpreter result so that it can be restored after a call to
       Tcl_Eval or some other routine that modifies the interpreter result.  These routines are passed a pointer to a structure that  is  used	to
       store  enough  information to restore the interpreter result state.  This structure can be allocated on the stack of the calling procedure.
       These routines do not save the state of any error information in the interpreter (e.g. the errorCode or errorInfo variables).

       Tcl_SaveResult moves the string and object results of interp into the location specified by statePtr.  Tcl_SaveResult clears the result for
       interp and leaves the result in its normal empty initialized state.

       Tcl_RestoreResult  moves  the string and object results from statePtr back into interp.	Any result or error that was already in the inter-
       preter will be cleared.	The statePtr is left in an uninitialized state and cannot be used until another call to Tcl_SaveResult.

       Tcl_DiscardResult releases the saved interpreter state stored at statePtr.  The state structure is left in an uninitialized state and  can-
       not be used until another call to Tcl_SaveResult.

       Once  Tcl_SaveResult  is  called  to  save the interpreter result, either Tcl_RestoreResult or Tcl_DiscardResult must be called to properly
       clean up the memory associated with the saved state.

KEYWORDS

       result, state, interp

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWTcl	      |
       +--------------------+-----------------+
       |Interface Stability | Uncommitted     |
       +--------------------+-----------------+
NOTES

       Source for Tcl is available on http://opensolaris.org.

Tcl									8.1						      Tcl_SaveResult(3TCL)

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