Blt_TreeExists(3) BLT Library Procedures Blt_TreeExists(3)
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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.
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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
BLT
2.4 Blt_TreeExists(3)
