FCL(ID:5805/fcl003)

Command interface language 

• FCL tutorial
• The Design and Implementation of FCL FCL is an extension of the Tcl language that provides persistence for simple values, transactions, and a rudimentary object system. This document describes the high level design of the system along with some implementation details where appropriate. For a description of the user visible aspects of the system, see the accompanying user manual, FCL: The FAM Command Language.
  
  FCL is implemented in three layers. The lowest level layer is a C interface between the persistent storage manager and Tcl. The second layer is some Tcl code that implements a simple object system. The final layer is a set of abstract classes for design objects, which is implemented in the object system. This document will describe the lower two layers, and will also show where the layers interact. The toplevel layer is described in the user's manual. The following diagram shows the major components of the FCL system.