export function interpret(expr: ast.Expression): number {
    switch (expr.kind) {
        case "BinaryExpression":
            const { left, right } = expr;
            return interpret(left) + interpret(right);
    }
}

export function interpret(expr): number {
    return newFunction(expr);
}

function newFunction(expr: any) {
    switch (expr.kind) {
        case "BinaryExpression":
            const { left, right } = expr;
            return interpret(left) + interpret(right);
    }
}

export function interpret(expr): number {
    return newFunction();

    function newFunction() {
        switch(expr.kind) {
        case "BinaryExpression":
        const { left, right } = expr;
        return interpret(left) + interpret(right);
    }
    }
}