Fixed Arrays

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fixed_arrays.fl

// Build: build/flecha build examples/fixed_arrays.fl -o build/fixed_arrays
// Prints 1 through 5, each on its own line, and exits with 0.

void sort(&[5]i32 values) {
    usize pass = 0;
    while pass < (*values).len() {
        usize index = 0;
        while index + 1 < (*values).len() {
            if (*values)[index] > (*values)[index + 1] {
                i32 temporary = (*values)[index];
                (*values)[index] = (*values)[index + 1];
                (*values)[index + 1] = temporary;
            }
            index = index + 1;
        }
        pass = pass + 1;
    }
}

i32 main() {
    [5]i32 original = [5, 1, 4, 2, 3];
    sorted := original; // Copies the elements into independent inline storage.
    sort(&sorted);
    if original[0] != 5 { return 1; }

    usize index = 0;
    while index < sorted.len() {
        stdoutln(sorted[index]);
        index = index + 1;
    }

    [4]u8 zeros = none;
    [4]u8 repeated = [7; 4];
    const [4]u8 fixed = repeated;
    [0]u8 empty = [];
    if zeros[0] != 0 or fixed[3] != 7 or empty.len() != 0 { return 2; }

    [2][3]u8 grid = [[1, 2, 3], [4, 5, 6]];
    cell := &grid[1][2];
    *cell = 42;
    // cell's last use has passed; direct access is permitted again.
    if grid[1][2] != 42 { return 3; }
    return 0;
}