4.1 ECL stacks
ECL uses the following stacks:
- Frame Stack
- consisting of catch, block, tagbody frames
- Bind Stack
- for shallow binding of dynamic variables
- Interpreter Stack
- acts as a Forth data stack, keeping intermediate arguments to
interpreted functions, plus a history of called functions.
- C Control Stack
- used for arguments/values passing, typed lexical variables,
temporary values, and function invocation.