A
Tcl extension is a new command written in the implementation language of Tcl and provided via
load. Because it has access to the
Tcl C API and the structures that implement objects visible at the script level, an extension can extend the feature set of the Tcl interpreter. A
procedure, the body of which is simply a script to be evaluated by the interpreter, lacks this capability. An extension is often included in a
package, where the
pkgIndex.tcl script uses
load to load the extension into the interpreter process. An extension may define new actions, new
widgets, new processing types, etc.
See Also edit
- Tcl Extension: User Guide
- Tcl Extension: Developer Guide
- Extensions for Tcl and Tk
- Extending Tcl
- How to write software that will be implemented as an extension, perhaps in C (or C++ code with extern "C" {} around it).
- Sampleextension
- package
- extension language
