// To implement.

[ ] and/or operator implementation.
[ ] Runtime error trace.
[ ] Make it possible to override function names.
[ ] VM's debug informations.
     [*] Compiled opcode dump.
     [ ] Stack trace.
[ ] Stack reallocation.
[ ] Garbage collection.
     [*] Mark phase.
     [ ] Sweep phase.
[ ] Hex, binary literals and floats like ".5".
[ ] Relative file import.
[ ] Union tagging alter in var.

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

// Bugs.
[ ] Update cache on each recompilation instead of making a new cache.