Class BBContainerSEXP

Remarks

BBContainer represents a logical piece of compilable code, it consists of two parts. The first arg contains a BindingsSEXP which is used to create and populate a stack frame. The second arg contains a ListSEXP of type BBSEXP which contains the instructions to execute.

Structure

• ARG(bindings): Stores a BindingsSEXP.

• ARG(BB): Stores a ListSEXP of type BBSEXP.

• FLAG(ECMAArgs): Used to set the length property for functions, which indicates the number of expected arguments as per the ECMAScript spec.

• FLAG(StartBBIDX): IDX of the entry BB.

• FLAG(ScopeIDX): Scope/environment IDX of top level scope for this container.

• FLAG(ARGUMENTS): Is the arguments object allowed in this scope?

• FLAG(ASYNC): Is this an asynchronous function/module?

• FLAG(STRICT): Is the code in strict mode?

• FLAG(GENERATOR): Is this a generator function?

• FLAG(PROTO): Does the function have a prototype?

• FLAG(NEW): Is new.target lookup allowed in this function?

• FLAG(SCALL): Is super call allowed in this function?

• FLAG(SOBJ): Is super object allowed in this function?

• FLAG(HOME): Does this function need the home object?

• FLAG(DERIVED): Is this a derived constructor function?

• FLAG(TopLevel): Is top Level?

• FLAG(ContainerFlagID): A number.

Closure Type Map

1. Regular Closure = { }

2. Constructor = { PROTO, NEW }

3. Derived Constructor = { PROTO, NEW, SCALL, SOBJ, HOME, DERIVED }

4. Derived Method = { SOBJ, HOME }

5. Private Method = { HOME }

6. Prop Init + no_private = { }

7. Prop Init Derived + no_private = { SOBJ, HOME }

8. Prop Init + private = { HOME }

9. Prop Init Derived + private = { SOBJ, HOME }

10. Private Derived Method = { SOBJ, HOME }

11. Static Prop Init = { }

12. Static Prop Init Derived = { SOBJ, HOME }