Itai-Nelken / lox_cpp

A Lox implementation in C++

Lox++

Lox++ is a compiler and bytecode VM for the toy language Lox (described in the great book Crafting interpreters).
Lox++ is an implementation of Clox as described in the book but written in C++ using only the C standard library.
The only C++ features used are:

• classes
• enum classes
• custom namespaces
• templates (generics)
• references

Lox++ is currently at chapter 19: Strings

Extra features

• nil or null.
• fun or fn.

Optimizations

• Use same constants: when adding a constant if it already exists in the chunk's constant pool, use the exisiting one. this saves memory and makes the 255 constants per chunk limit slightly less annoying.

TODO

• more than 256 constants per chunk (OP_CONSTANT_LONG or OP_CONSTANT_16 (2 byte operand)).
• string interpolation (one of: $"{var}", "${var}", f"{var}").
• optimization: if constant is already in constant pool, use it instead of adding a new one.