src/cli.js
function _eval(opts) {
    throwIfRequiredOption(opts, 'src')

    var src = opts['src']

    // read from stdin
    if (src === 'stdin') {
        readFromStdin(function(src) {
            run(src)
        })
    } else {
        run(src)
    }

    function run(src) {
        var fn = new Function('R', ram.compile(src, '<eval>').js)
        fn(R)
    }
}
function _eval(opts) {
    throwIfRequiredOption(opts, 'src')

    var src = opts['src']

    // read from stdin
    if (src === 'stdin') {
        readFromStdin(function(src) {
            run(src)
        })
    } else {
        run(src)
    }

    function run(src) {
        var fn = new Function('R', ram.compile(src, '<eval>').js)
        fn(R)
    }
}
executes eval command