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lox-cpp

C++20 implementation of the bytecode VM from Crafting Interpreters.

Build and run

make
./loxc <file>

By default it builds a debug version; use make BUILD=release to disable that.

Generating compile_commands.json

This is needed to make clang-based tools (like clangd) work properly:

brew install bear
make clean
bear -- make test

Note that building the test target also builds the main programme (so this ensures that compile_commands.json will contain entries for both the main programme and the tests).

Tests

brew install pkg-config catch2
make test

Differences from the book

I allow

{
  var a = 1;
  {
    var a = a;
  }
}

The initialiser on the right hand side refers to the outer a, not itself. Original Lox throws an error in this case.