// To implement.

[ ] Garbage collection.
     [*] Mark phase.
     [ ] Sweep phase.
[ ] Stack reallocation.
[ ] and/or operator implementation.
[ ] Relative file import.
[ ] Remove resolve path for the root module.

[ ] Implement fiber from script body and vm run fibers (not scripts).
    Then remove vm's root script.
[ ] C Integration api (including add core lib from host application).
[ ] REPL.
    [ ] compile expression for a script.
[ ] Var handler implement.
[ ] Make it possible to override function names.
[ ] Hex, binary literals and floats like ".5".
[ ] Union tagging alter in var.
[ ] Add a make file/and more? (not every one has scons).
[ ] (future) add structs and maybe enums.

// Add more.
[ ] Compilte core methods.
[ ] Complete var methods.
[ ] Complete core functions.
[ ] Complete builtin operators.
[ ] Complete opcodes.
[ ] Complete core libs.
[ ] Complete the docs.
[ ] More Tests.

// Bugs.
It's at pre-alpha and every thing is left to
implement, and nothing would be work as expected.