archie/tcl7.3/doc/SetRecLmt.3
2024-05-27 16:13:40 +02:00

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.so man.macros
.HS Tcl_SetRecursionLimit tclc 7.0
.BS
.SH NAME
Tcl_SetRecursionLimit \- set maximum allowable nesting depth in interpreter
.SH SYNOPSIS
.nf
\fB#include <tcl.h>\fR
.sp
int
\fBTcl_SetRecursionLimit\fR(\fIinterp, depth\fR)
.SH ARGUMENTS
.AS Tcl_Interp *interp
.AP Tcl_Interp *interp in
Interpreter whose recursion limit is to be set.
Must be greater than zero.
.AP int depth in
New limit for nested calls to \fBTcl_Eval\fR for \fIinterp\fR.
.BE
.SH DESCRIPTION
.PP
At any given time Tcl enforces a limit on the number of recursive
calls that may be active for \fBTcl_Eval\fR and related procedures
such as \fBTcl_GlobalEval\fR.
Any call to \fBTcl_Eval\fR that exceeds this depth is aborted with
an error.
By default the recursion limit is 1000.
.PP
\fBTcl_SetRecursionLimit\fR may be used to change the maximum
allowable nesting depth for an interpreter.
The \fIdepth\fR argument specifies a new limit for \fIinterp\fR,
and \fBTcl_SetRecursionLimit\fR returns the old limit.
To read out the old limit without modifying it, invoke
\fBTcl_SetRecursionDepth\fR with \fIdepth\fR equal to 0.
.SH KEYWORDS
nesting depth, recursion