Just me going through "Crafting Interpreters". The code is pretty much the exact same as the one in the book except for some naming conventions (snake_case VS camelCase and some other stuff).

Write some simple Lox file like this one:

class Pair {}

fun get_pair(x, y) {
    var pair = Pair();
    pair.first = 1;
    pair.second = 2;

    return pair;
}

var p = get_pair(1, 2);
var result = p.first + p.second;
print result;

Then compile the binary and run it:

make && ./bin/lox file.lox

Should print 3 to standard output.

There are some flags that make accepts:

• DEBUG_PRINT_CODE: Prints the dissassembly of the Lox file.
• DEBUG_TRACE_EXECUTION: Prints each instruction and state of stack at runtime.
• DEBUG_STRESS_GC: Triggers the garbage collector on every single allocation.
• DEBUG_LOG_GC: Prints garbage collector execution.

Use flags like this:

make clean && make DEBUG_TRACE_EXECUTION=1 DEBUG_PRINT_CODE=1 && ./bin/lox example.lox

After that you should see the instructions twice, once after compilation and then again at runtime along with the state of the stack.