Man pages sections > man3 > Blt_TreeExists

Blt_TreeExists - Indicates if a tree exists.

Blt_TreeExists(3) BLT Library Procedures Blt_TreeExists(3)

NAME

Blt_TreeExists - Indicates if a tree exists.

SYNOPSIS

#include <bltTree.h>
 
int Blt_TreeExists(interp, name)

ARGUMENTS

Tcl_Interp *interp (in)
Interpreter to determine current namespace context.
const char *name (in)
Name of an existing tree data object. Can be qualified by a namespace.
    
 

DESCRIPTION

This procedure determines if a C-based tree data object exists by a given name. The arguments are as follows:
interp
Used the determine the current namespace context.
name
Name of an existing tree data object. Name can be qualified by a namespace such as fred::myTree. If no namespace qualifier is used, the current namespace is searched, then the global namespace.

RETURNS

A boolean result is returned. If the tree exists 1 is returned, 0 otherwise.

EXAMPLE

The following example checks if a tree "myTree" exists.
 
if (!Blt_TreeExists(interp, "myTree")) { fprintf(stderr, "can't find tree \"myTree\\n"); }
 

KEYWORDS

tree, token Tcl_TreeCreate, Tcl_TreeGetToken, Tcl_TreeReleaseToken
2.5 BLT