Night

Night is a bytecode interpreted language.

Table of contents

• Usage
• Build
• Tests

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Usage

You can download either the Windows, Linux or Mac binaries in the Releases section.

Then create a *.night file containing your Night code. Example programs can be found under the programs directory.

To run a Night file, simply type,

./night source.night

Try it out with this simple Night code!

source.night

# recursive fib function
def fib(n int) int
{
    if (n == 0 || n == 1)
        return n;

    return fib(n - 1) + fib(n - 2);
}

print("Enter a number: ");
n int = int(input());

for (i int = 0; i < n; i += 1)
    print(str(fib(i)) + " ");

The programs directory contains sample programs written in Night. These programs are also used in the CI pipeline as integration tests.

---

Build

Dependenies,

• cmake
• g++ or clang

First, clone the repo and move into that directory. Configure cmake and build (optionally specify a Release build with --Release). You should then see a night exectuable file in the current directory.

git clone https://github.com/alex/apostolu/night.git
cd night

mkdir build
cd build

cmake ..
cmake --build .

./night source.night

Tests

There's a testing directory for impractical code, and a sample directory for real world code, both of which come with a testing script that takes in the night executable.

night\tests> sh test_night.sh ../build/night.exe
night\samples> sh test_samples.sh ../build/night.exe

Expected output:

Running 3 tests...

programs/arrays.night Passed.
programs/basic.night Passed.
programs/functions.night Passed.

All tests passed.

Running 15 samples...

programs/ccc/2025_j3.night Passed.
programs/cs50/w1_cash.night Passed.
programs/cs50/w1_credit.night Passed.
programs/cs50/w1_mario.night Passed.
programs/cs50/w2_caesar.night Passed.
programs/cs50/w2_readability.night Passed.
programs/cs50/w2_scrabble.night Passed.
programs/cs50/w2_substitution.night Passed.
programs/leetcode/1_twosum.night Passed.
programs/leetcode/20_parantheses.night Passed.
programs/leetcode/21_mergelists.night Passed.
programs/leetcode/26_removeduplicates.night Passed.
programs/leetcode/9_palindrome.night Passed.
programs/math/collatz_conjecture.night Passed.
programs/math/fizzbuzz.night Passed.

All samples passed.