A place for the code from the Crafting Interpreters book (https://craftinginterpreters.com/contents.html)

jlox

Minor extensions:

• Supports C-style /*...*/ block comments (not nested)
• Comma expressions
• C-style ternary operator ?:
• Supports concatenation of strings with other types via addition +
• Detects and reports a runtime error when division by zero occurs
• Supports break statement inside loops

clox

Minor extensions:

• Arity checking for native functions
• Extended native function system for reporting runtime errors. Example:

static bool callValue(Value callee, int argCount) {
    if (IS_OBJ(callee)) {
        switch (OBJ_TYPE(callee)) {
            case OBJ_NATIVE: {
                if (AS_NATIVE_ARITY(callee) != argCount) {
                    runtimeError(false, "Expected %d arguments but got %d.", AS_NATIVE_ARITY(callee), argCount);
                    return false;
                }
                /*...*/
                return true;
            }
            /*...*/
        }
    }
}