Adds most of the toolsHEADmaster

1 files changed, 1469 insertions, 0 deletions

diff --git a/v_windows/v/old/vlib/builtin/array_test.v b/v_windows/v/old/vlib/builtin/array_test.v
new file mode 100644
index 0000000..d7699ca
--- /dev/null
+++ b/v_windows/v/old/vlib/builtin/array_test.v
@@ -0,0 +1,1469 @@
+fn test_pointer() {
+	mut arr := []&int{}
+	a := 1
+	b := 2
+	c := 3
+	arr << &a
+	arr << &b
+	arr << &c
+	assert *arr[0] == 1
+	arr[1] = &c
+	assert *arr[1] == 3
+	mut d_arr := [arr] // [][]&int
+	d_arr << arr
+	assert *d_arr[0][1] == 3
+	println(*d_arr[0][1])
+	assert *d_arr[1][0] == 1
+}
+
+fn test_assign() {
+	mut arr := [2, 4, 8, 16, 32, 64, 128]
+	arr[0] = 2
+	arr[1] &= 255
+	arr[2] |= 255
+	arr[3] <<= 4
+	arr[4] >>= 4
+	arr[5] %= 5
+	arr[6] ^= 3
+	assert arr[0] == 2
+	assert arr[1] == 4 & 255
+	assert arr[2] == 8 | 255
+	assert arr[3] == 16 << 4
+	assert arr[4] == 32 >> 4
+	assert arr[5] == 64 % 5
+	assert arr[6] == 128 ^ 3
+}
+
+fn test_ints() {
+	mut a := [1, 5, 2, 3]
+	assert a.len == 4
+	assert a[0] == 1
+	assert a[2] == 2
+	assert a.last() == 3
+	a << 4
+	assert a.len == 5
+	assert a[4] == 4
+	assert a.last() == 4
+	s := a.str()
+	assert s == '[1, 5, 2, 3, 4]'
+	assert a[1] == 5
+	assert a.last() == 4
+}
+
+fn test_deleting() {
+	mut a := [1, 5, 2, 3, 4]
+	assert a.len == 5
+	assert a.str() == '[1, 5, 2, 3, 4]'
+	a.delete(0)
+	assert a.str() == '[5, 2, 3, 4]'
+	assert a.len == 4
+	a.delete(1)
+	assert a.str() == '[5, 3, 4]'
+	assert a.len == 3
+	a.delete(a.len - 1)
+	assert a.str() == '[5, 3]'
+	assert a.len == 2
+}
+
+fn test_slice_delete() {
+	mut a := [1.5, 2.5, 3.25, 4.5, 5.75]
+	b := a[2..4]
+	a.delete(0)
+	assert a == [2.5, 3.25, 4.5, 5.75]
+	assert b == [3.25, 4.5]
+	a = [3.75, 4.25, -1.5, 2.25, 6.0]
+	c := a[..3]
+	a.delete(2)
+	assert a == [3.75, 4.25, 2.25, 6.0]
+	assert c == [3.75, 4.25, -1.5]
+}
+
+fn test_delete_many() {
+	mut a := [1, 2, 3, 4, 5, 6, 7, 8, 9]
+	b := a[2..6]
+	a.delete_many(4, 3)
+	assert a == [1, 2, 3, 4, 8, 9]
+	assert b == [3, 4, 5, 6]
+	c := a[..a.len]
+	a.delete_many(2, 0) // this should just clone
+	a[1] = 17
+	assert a == [1, 17, 3, 4, 8, 9]
+	assert c == [1, 2, 3, 4, 8, 9]
+	a.delete_many(0, a.len)
+	assert a == []int{}
+}
+
+fn test_short() {
+	a := [1, 2, 3]
+	assert a.len == 3
+	assert a.cap == 3
+	assert a[0] == 1
+	assert a[1] == 2
+	assert a[2] == 3
+}
+
+fn test_large() {
+	mut a := [0].repeat(0)
+	for i in 0 .. 10000 {
+		a << i
+	}
+	assert a.len == 10000
+	assert a[234] == 234
+}
+
+struct Chunk {
+	val string
+}
+
+struct Kkk {
+	q []Chunk
+}
+
+fn test_empty() {
+	mut chunks := []Chunk{}
+	a := Chunk{}
+	assert chunks.len == 0
+	chunks << a
+	assert chunks.len == 1
+	chunks = []
+	assert chunks.len == 0
+	chunks << a
+	assert chunks.len == 1
+}
+
+fn test_push() {
+	mut a := []int{}
+	a << 1
+	a << 3
+	assert a[1] == 3
+	assert a.str() == '[1, 3]'
+}
+
+fn test_insert() {
+	mut a := [1, 2]
+	a.insert(0, 3)
+	assert a[0] == 3
+	assert a[2] == 2
+	assert a.len == 3
+	a.insert(1, 4)
+	assert a[1] == 4
+	assert a[2] == 1
+	assert a.len == 4
+	a.insert(4, 5)
+	assert a[4] == 5
+	assert a[3] == 2
+	assert a.len == 5
+	mut b := []f64{}
+	assert b.len == 0
+	b.insert(0, f64(1.1))
+	assert b.len == 1
+	assert b[0] == f64(1.1)
+}
+
+fn test_insert_many() {
+	mut a := [3, 4]
+	a.insert(0, [1, 2])
+	assert a == [1, 2, 3, 4]
+	b := [5, 6]
+	a.insert(1, b)
+	assert a == [1, 5, 6, 2, 3, 4]
+}
+
+fn test_prepend() {
+	mut a := []int{}
+	assert a.len == 0
+	a.prepend(1)
+	assert a.len == 1
+	assert a[0] == 1
+	mut b := []f64{}
+	assert b.len == 0
+	b.prepend(f64(1.1))
+	assert b.len == 1
+	assert b[0] == f64(1.1)
+}
+
+fn test_prepend_many() {
+	mut a := [3, 4]
+	a.prepend([1, 2])
+	assert a == [1, 2, 3, 4]
+	b := [5, 6]
+	a.prepend(b)
+	assert a == [5, 6, 1, 2, 3, 4]
+}
+
+fn test_strings() {
+	a := ['a', 'b', 'c']
+	assert a.str() == "['a', 'b', 'c']"
+}
+
+/*
+fn test_compare_ints() {
+    assert compare_ints(1, 2) == -1
+    assert compare_ints(2, 1) == 1
+    assert compare_ints(0, 0) == 0
+
+    a := 1
+    b := 2
+    assert compare_ints(a, b) == -1
+    assert compare_ints(b, a) == 1
+    assert compare_ints(a, a) == 0
+}
+*/
+fn test_repeat() {
+	{
+		a := [0].repeat(5)
+		assert a.len == 5
+		assert a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0 && a[4] == 0
+	}
+	{
+		a := [1.1].repeat(10)
+		assert a[0] == 1.1
+		assert a[5] == 1.1
+		assert a[9] == 1.1
+	}
+	{
+		a := [i64(-123)].repeat(10)
+		assert a[0] == -123
+		assert a[5] == -123
+		assert a[9] == -123
+	}
+	{
+		a := [u64(123)].repeat(10)
+		assert a[0] == 123
+		assert a[5] == 123
+		assert a[9] == 123
+	}
+	{
+		a := [1.1].repeat(10)
+		assert a[0] == 1.1
+		assert a[5] == 1.1
+		assert a[9] == 1.1
+	}
+	{
+		a := [1, 2].repeat(2)
+		assert a[0] == 1
+		assert a[1] == 2
+		assert a[2] == 1
+		assert a[3] == 2
+	}
+	{
+		a := ['1', 'abc'].repeat(2)
+		assert a[0] == '1'
+		assert a[1] == 'abc'
+		assert a[2] == '1'
+		assert a[3] == 'abc'
+	}
+	{
+		mut a := ['1', 'abc'].repeat(0)
+		assert a.len == 0
+		a << 'abc'
+		assert a[0] == 'abc'
+	}
+}
+
+fn test_deep_repeat() {
+	mut a3 := [[[1, 1], [2, 2], [3, 3]], [[4, 4], [5, 5], [6, 6]]]
+	r := a3.repeat(3)
+	a3[1][1][0] = 17
+	assert r == [
+		[[1, 1], [2, 2], [3, 3]],
+		[[4, 4], [5, 5], [6, 6]],
+		[[1, 1], [2, 2], [3, 3]],
+		[[4, 4], [5, 5], [6, 6]],
+		[[1, 1], [2, 2], [3, 3]],
+		[[4, 4], [5, 5], [6, 6]],
+	]
+	assert a3 == [[[1, 1], [2, 2], [3, 3]], [[4, 4], [17, 5], [6, 6]]]
+}
+
+fn test_right() {
+	a := [1, 2, 3, 4]
+	c := a[1..a.len]
+	d := a[1..]
+	assert c[0] == 2
+	assert c[1] == 3
+	assert d[0] == 2
+	assert d[1] == 3
+}
+
+fn test_left() {
+	a := [1, 2, 3]
+	c := a[0..2]
+	d := a[..2]
+	assert c[0] == 1
+	assert c[1] == 2
+	assert d[0] == 1
+	assert d[1] == 2
+}
+
+fn test_slice() {
+	a := [1, 2, 3, 4]
+	b := a[2..4]
+	assert b.len == 2
+	assert a[1..2].len == 1
+	assert a.len == 4
+}
+
+fn test_push_many() {
+	mut a := [1, 2, 3]
+	b := [4, 5, 6]
+	a << b
+	assert a.len == 6
+	assert a[0] == 1
+	assert a[3] == 4
+	assert a[5] == 6
+}
+
+fn test_reverse() {
+	a := [1, 2, 3, 4]
+	b := ['test', 'array', 'reverse']
+	c := a.reverse()
+	println(c)
+	d := b.reverse()
+	for i, _ in c {
+		assert c[i] == a[a.len - i - 1]
+	}
+	for i, _ in d {
+		assert d[i] == b[b.len - i - 1]
+	}
+	e := []int{}
+	f := e.reverse()
+	assert f.len == 0
+}
+
+const (
+	c_n = 5
+)
+
+struct Foooj {
+	a [5]int // c_n
+}
+
+fn test_fixed() {
+	mut nums := [4]int{}
+	// x := nums[1..3]
+	// assert x.len == 2
+	assert nums[0] == 0
+	assert nums[1] == 0
+	assert nums[2] == 0
+	assert nums[3] == 0
+	nums[1] = 7
+	assert nums[1] == 7
+	nums2 := [5]int{} // c_n
+	assert nums2[c_n - 1] == 0
+}
+
+fn modify(mut numbers []int) {
+	numbers[0] = 777
+}
+
+fn test_mut_slice() {
+	mut n := [1, 2, 3]
+	// modify(mut n)
+	modify(mut n[..2])
+	assert n[0] == 777
+	modify(mut n[2..])
+	assert n[2] == 777
+	println(n)
+}
+
+fn double_up(mut a []int) {
+	for i := 0; i < a.len; i++ {
+		a[i] = a[i] * 2
+	}
+}
+
+fn double_up_v2(mut a []int) {
+	for i, _ in a {
+		a[i] = a[i] * 2 // or val*2, doesn't matter
+	}
+}
+
+fn test_mut_arg() {
+	mut arr := [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+	double_up(mut arr)
+	assert arr.str() == '[2, 4, 6, 8, 10, 12, 14, 16, 18, 20]'
+	arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+	double_up_v2(mut arr)
+	assert arr.str() == '[2, 4, 6, 8, 10, 12, 14, 16, 18, 20]'
+}
+
+fn test_clone() {
+	nums := [1, 2, 3, 4, 100]
+	_ = nums
+	nums2 := nums.clone()
+	assert nums2.len == 5
+	assert nums.str() == '[1, 2, 3, 4, 100]'
+	assert nums2.str() == '[1, 2, 3, 4, 100]'
+	assert nums[1..3].str() == '[2, 3]'
+}
+
+/*
+fn test_copy() {
+	a := [1, 2, 3]
+	b := a
+	assert b[0] == 1
+	assert b[1] == 2
+	assert b[2] == 3
+}
+*/
+fn test_multi_array_clone() {
+	// 2d array_int
+	mut a2_1 := [[1, 2, 3], [4, 5, 6]]
+	mut a2_2 := a2_1.clone()
+	a2_1[0][1] = 0
+	a2_2[1][0] = 0
+	assert a2_1 == [[1, 0, 3], [4, 5, 6]]
+	assert a2_2 == [[1, 2, 3], [0, 5, 6]]
+	// 2d array_string
+	mut b2_1 := [['1', '2', '3'], ['4', '5', '6']]
+	mut b2_2 := b2_1.clone()
+	b2_1[0][1] = '0'
+	b2_2[1][0] = '0'
+	assert b2_1 == [['1', '0', '3'], ['4', '5', '6']]
+	assert b2_2 == [['1', '2', '3'], ['0', '5', '6']]
+	// 3d array_int
+	mut a3_1 := [[[1, 1], [2, 2], [3, 3]], [[4, 4], [5, 5], [6, 6]]]
+	mut a3_2 := a3_1.clone()
+	a3_1[0][0][1] = 0
+	a3_2[0][1][0] = 0
+	assert a3_1 == [[[1, 0], [2, 2], [3, 3]], [[4, 4], [5, 5],
+		[6, 6],
+	]]
+	assert a3_2 == [[[1, 1], [0, 2], [3, 3]], [[4, 4], [5, 5],
+		[6, 6],
+	]]
+	// 3d array_string
+	mut b3_1 := [[['1', '1'], ['2', '2'], ['3', '3']], [['4', '4'],
+		['5', '5'], ['6', '6']]]
+	mut b3_2 := b3_1.clone()
+	b3_1[0][0][1] = '0'
+	b3_2[0][1][0] = '0'
+	assert b3_1 == [[['1', '0'], ['2', '2'], ['3', '3']], [['4', '4'],
+		['5', '5'], ['6', '6']]]
+	assert b3_2 == [[['1', '1'], ['0', '2'], ['3', '3']], [['4', '4'],
+		['5', '5'], ['6', '6']]]
+}
+
+fn test_doubling() {
+	mut nums := [1, 2, 3, 4, 5]
+	for i in 0 .. nums.len {
+		nums[i] *= 2
+	}
+	println(nums.str())
+	assert nums.str() == '[2, 4, 6, 8, 10]'
+}
+
+struct Test2 {
+	one int
+	two int
+}
+
+struct Test {
+	a string
+mut:
+	b []Test2
+}
+
+// TODO: default array/struct str methods
+fn (ta []Test2) str() string {
+	mut s := '['
+	for i, t in ta {
+		s += t.str()
+		if i < ta.len - 1 {
+			s += ', '
+		}
+	}
+	s += ']'
+	return s
+}
+
+fn (t Test2) str() string {
+	return '{$t.one $t.two}'
+}
+
+fn (t Test) str() string {
+	return '{$t.a $t.b}'
+}
+
+fn test_struct_print() {
+	mut a := Test{
+		a: 'Test'
+		b: []
+	}
+	b := Test2{
+		one: 1
+		two: 2
+	}
+	a.b << b
+	a.b << b
+	assert a.str() == '{Test [{1 2}, {1 2}]}'
+	assert b.str() == '{1 2}'
+	assert a.b.str() == '[{1 2}, {1 2}]'
+}
+
+fn test_single_element() {
+	mut a := [1]
+	a << 2
+	assert a.len == 2
+	assert a[0] == 1
+	assert a[1] == 2
+	println(a)
+}
+
+fn test_find_index() {
+	// string
+	a := ['v', 'is', 'great']
+	assert a.index('v') == 0
+	assert a.index('is') == 1
+	assert a.index('gre') == -1
+	// int
+	b := [1, 2, 3, 4]
+	assert b.index(1) == 0
+	assert b.index(4) == 3
+	assert b.index(5) == -1
+	// byte
+	c := [0x22, 0x33, 0x55]
+	assert c.index(0x22) == 0
+	assert c.index(0x55) == 2
+	assert c.index(0x99) == -1
+	// char
+	d := [`a`, `b`, `c`]
+	assert d.index(`b`) == 1
+	assert d.index(`c`) == 2
+	assert d.index(`u`) == -1
+}
+
+fn test_multi() {
+	a := [[1, 2, 3], [4, 5, 6]]
+	assert a.len == 2
+	assert a[0].len == 3
+	assert a[0][0] == 1
+	assert a[0][2] == 3
+	assert a[1][2] == 6
+	// TODO
+	// b :=  [ [[1,2,3],[4,5,6]], [[1,2]] ]
+	// assert b[0][0][0] == 1
+}
+
+fn test_in() {
+	a := [1, 2, 3]
+	assert 1 in a
+	assert 2 in a
+	assert 3 in a
+	assert !(4 in a)
+	assert !(0 in a)
+	assert 0 !in a
+	assert 4 !in a
+	b := [1, 4, 0]
+	c := [3, 6, 2, 0]
+	assert 0 in b
+	assert 0 in c
+}
+
+fn sum(prev int, curr int) int {
+	return prev + curr
+}
+
+fn sub(prev int, curr int) int {
+	return prev - curr
+}
+
+fn test_reduce() {
+	a := [1, 2, 3, 4, 5]
+	b := a.reduce(sum, 0)
+	c := a.reduce(sum, 5)
+	d := a.reduce(sum, -1)
+	assert b == 15
+	assert c == 20
+	assert d == 14
+	e := [1, 2, 3]
+	f := e.reduce(sub, 0)
+	g := e.reduce(sub, -1)
+	assert f == -6
+	assert g == -7
+}
+
+fn filter_test_helper_1(a int) bool {
+	return a > 3
+}
+
+fn test_filter() {
+	a := [1, 2, 3, 4, 5, 6]
+	b := a.filter(it % 2 == 0)
+	assert b.len == 3
+	assert b[0] == 2
+	assert b[1] == 4
+	assert b[2] == 6
+	c := ['v', 'is', 'awesome']
+	d := c.filter(it.len > 1)
+	assert d[0] == 'is'
+	assert d[1] == 'awesome'
+	////////
+	arr := [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+	println(arr.filter(it % 2 == 0 || it % 3 == 0))
+	assert true
+	assert [1, 2, 3].len == 3
+	mut mut_arr := [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+	mut_arr = mut_arr.filter(it < 4)
+	assert mut_arr.len == 3
+	assert a.filter(filter_test_helper_1) == [4, 5, 6]
+	assert [1, 5, 10].filter(filter_test_helper_1) == [5, 10]
+	// TODO
+	// assert arr.filter(arr % 2).len == 5
+}
+
+fn test_anon_fn_filter() {
+	filter_num := fn (i int) bool {
+		return i % 2 == 0
+	}
+	assert [1, 2, 3, 4, 5].filter(filter_num) == [2, 4]
+}
+
+fn test_anon_fn_arg_filter() {
+	a := [1, 2, 3, 4].filter(fn (i int) bool {
+		return i % 2 == 0
+	})
+	assert a == [2, 4]
+}
+
+fn map_test_helper_1(i int) int {
+	return i * i
+}
+
+fn map_test_helper_2(i int, b string) int {
+	return i + b.len
+}
+
+fn map_test_helper_3(i int, b []string) int {
+	return i + b.map(it.len)[i % b.len]
+}
+
+fn test_map() {
+	nums := [1, 2, 3, 4, 5, 6]
+	strs := ['v', 'is', 'awesome']
+	// assert nums.map() == <error>
+	// assert nums.map(it, 'excessive') == <error>
+	// identity
+	assert nums.map(it) == [1, 2, 3, 4, 5, 6]
+	assert strs.map(it) == ['v', 'is', 'awesome']
+	assert nums.map(it - it) == [0, 0, 0, 0, 0, 0]
+	assert nums.map(it - it)[0] == 0
+	// type switch
+	assert nums.map(it * 10) == [10, 20, 30, 40, 50, 60]
+	assert nums.map(it * it) == [1, 4, 9, 16, 25, 36]
+	assert nums.map('$it') == ['1', '2', '3', '4', '5', '6']
+	assert nums.map(it % 2 == 0) == [false, true, false, true, false, true]
+	assert strs.map(it.to_upper()) == ['V', 'IS', 'AWESOME']
+	assert strs.map(it == 'awesome') == [false, false, true]
+	assert strs.map(it.len in nums) == [true, true, false]
+	assert strs.map(int(7)) == [7, 7, 7]
+	// external func
+	assert nums.map(map_test_helper_1(it)) == [1, 4, 9, 16, 25, 36]
+	assert nums.map(map_test_helper_2(it, 'bb')) == [3, 4, 5, 6, 7, 8]
+	assert nums.map(map_test_helper_3(it, strs)) == [3, 9, 4, 6, 12, 7]
+	// empty array as input
+	assert []int{len: 0}.map(it * 2) == []
+	// nested maps (where it is of same type)
+	assert nums.map(strs.map(int(7)) == [7, 7, 7]) == [true, true, true, true, true, true]
+	assert nums.map('$it' + strs.map('a')[0]) == ['1a', '2a', '3a', '4a', '5a', '6a']
+	assert nums.map(it + strs.map(int(7))[0]) == [8, 9, 10, 11, 12, 13]
+	assert nums.map(it + strs.map(it.len)[0]) == [2, 3, 4, 5, 6, 7]
+	assert strs.map(it.len + strs.map(it.len)[0]) == [2, 3, 8]
+	// nested (different it types)
+	assert strs.map(it[nums.map(it - it)[0]]) == [byte(`v`), `i`, `a`]
+	assert nums[0..3].map('$it' + strs.map(it)[it - 1]) == ['1v', '2is', '3awesome']
+	assert nums.map(map_test_helper_1) == [1, 4, 9, 16, 25, 36]
+	assert [1, 5, 10].map(map_test_helper_1) == [1, 25, 100]
+	assert nums == [1, 2, 3, 4, 5, 6]
+	assert strs == ['v', 'is', 'awesome']
+}
+
+fn test_anon_fn_map() {
+	add_num := fn (i int) int {
+		return i + 1
+	}
+	assert [1, 2, 3].map(add_num) == [2, 3, 4]
+}
+
+fn test_multi_anon_fn_map() {
+	a := [1, 2, 3].map(fn (i int) int {
+		return i + 1
+	})
+	b := [1, 2, 3].map(fn (i int) int {
+		return i + 2
+	})
+	assert a == [2, 3, 4]
+	assert b == [3, 4, 5]
+}
+
+fn test_anon_fn_arg_map() {
+	a := [1, 2, 3].map(fn (i int) int {
+		return i + 1
+	})
+	assert a == [2, 3, 4]
+}
+
+fn test_anon_fn_arg_different_type_map() {
+	i_to_str := fn (i int) string {
+		return i.str()
+	}
+	a := [1, 2, 3].map(i_to_str)
+	assert a == ['1', '2', '3']
+}
+
+fn test_anon_fn_inline_different_type_map() {
+	a := [1, 2, 3].map(fn (i int) string {
+		return i.str()
+	})
+	assert a == ['1', '2', '3']
+}
+
+fn test_array_str() {
+	numbers := [1, 2, 3]
+	assert numbers == [1, 2, 3]
+	numbers2 := [numbers, [4, 5, 6]] // dup str() bug
+	println(numbers2)
+	assert true
+	assert numbers.str() == '[1, 2, 3]'
+	// QTODO
+	// assert numbers2.str() == '[[1, 2, 3], [4, 5, 6]]'
+}
+
+struct User {
+	age  int
+	name string
+}
+
+fn test_eq() {
+	assert [5, 6, 7] != [6, 7]
+	assert [`a`, `b`] == [`a`, `b`]
+	assert [User{
+		age: 22
+		name: 'bob'
+	}] == [User{
+		age: 22
+		name: 'bob'
+	}]
+	assert [map{
+		'bob': 22
+	}, map{
+		'tom': 33
+	}] == [map{
+		'bob': 22
+	}, map{
+		'tom': 33
+	}]
+	assert [[1, 2, 3], [4]] == [[1, 2, 3], [4]]
+}
+
+fn test_fixed_array_eq() {
+	a1 := [1, 2, 3]!
+	assert a1 == [1, 2, 3]!
+	assert a1 != [2, 3, 4]!
+
+	a2 := [[1, 2]!, [3, 4]!]!
+	assert a2 == [[1, 2]!, [3, 4]!]!
+	assert a2 != [[3, 4]!, [1, 2]!]!
+
+	a3 := [[1, 2], [3, 4]]!
+	assert a3 == [[1, 2], [3, 4]]!
+	assert a3 != [[1, 1], [2, 2]]!
+
+	a4 := [[`a`, `b`], [`c`, `d`]]!
+	assert a4 == [[`a`, `b`], [`c`, `d`]]!
+	assert a4 != [[`c`, `a`], [`a`, `b`]]!
+
+	a5 := [['aaa', 'bbb'], ['ccc', 'ddd']]!
+	assert a5 == [['aaa', 'bbb'], ['ccc', 'ddd']]!
+	assert a5 != [['abc', 'def'], ['ccc', 'ddd']]!
+
+	a6 := [['aaa', 'bbb']!, ['ccc', 'ddd']!]!
+	assert a6 == [['aaa', 'bbb']!, ['ccc', 'ddd']!]!
+	assert a6 != [['aaa', 'bbb']!, ['aaa', 'ddd']!]!
+
+	a7 := [[1, 2]!, [3, 4]!]
+	assert a7 == [[1, 2]!, [3, 4]!]
+	assert a7 != [[2, 3]!, [1, 2]!]
+
+	a8 := [['aaa', 'bbb']!, ['ccc', 'ddd']!]
+	assert a8 == [['aaa', 'bbb']!, ['ccc', 'ddd']!]
+	assert a8 != [['bbb', 'aaa']!, ['cccc', 'dddd']!]
+}
+
+fn test_fixed_array_literal_eq() {
+	assert [1, 2, 3]! == [1, 2, 3]!
+	assert [1, 1, 1]! != [1, 2, 3]!
+
+	assert [[1, 2], [3, 4]]! == [[1, 2], [3, 4]]!
+	assert [[1, 1], [2, 2]]! != [[1, 2], [3, 4]]!
+
+	assert [[1, 1]!, [2, 2]!]! == [[1, 1]!, [2, 2]!]!
+	assert [[1, 1]!, [2, 2]!]! != [[1, 2]!, [2, 3]!]!
+
+	assert [[1, 1]!, [2, 2]!] == [[1, 1]!, [2, 2]!]
+	assert [[1, 1]!, [2, 2]!] != [[1, 2]!, [2, 3]!]
+}
+
+fn test_sort() {
+	mut a := ['hi', '1', '5', '3']
+	a.sort()
+	assert a[0] == '1'
+	assert a[1] == '3'
+	assert a[2] == '5'
+	assert a[3] == 'hi'
+
+	mut nums := [67, -3, 108, 42, 7]
+	nums.sort()
+	assert nums[0] == -3
+	assert nums[1] == 7
+	assert nums[2] == 42
+	assert nums[3] == 67
+	assert nums[4] == 108
+
+	nums.sort(a < b)
+	assert nums[0] == -3
+	assert nums[1] == 7
+	assert nums[2] == 42
+	assert nums[3] == 67
+	assert nums[4] == 108
+
+	mut users := [User{22, 'Peter'}, User{20, 'Bob'}, User{25, 'Alice'}]
+	users.sort(a.age < b.age)
+	assert users[0].age == 20
+	assert users[1].age == 22
+	assert users[2].age == 25
+	assert users[0].name == 'Bob'
+	assert users[1].name == 'Peter'
+	assert users[2].name == 'Alice'
+
+	users.sort(a.age > b.age)
+	assert users[0].age == 25
+	assert users[1].age == 22
+	assert users[2].age == 20
+
+	users.sort(a.name < b.name) // Test sorting by string fields
+	// assert users.map(it.name).join(' ') == 'Alice Bob Peter'
+}
+
+fn test_rune_sort() {
+	mut bs := [`f`, `e`, `d`, `b`, `c`, `a`]
+	bs.sort()
+	println(bs)
+	assert '$bs' == '[`a`, `b`, `c`, `d`, `e`, `f`]'
+
+	bs.sort(a > b)
+	println(bs)
+	assert '$bs' == '[`f`, `e`, `d`, `c`, `b`, `a`]'
+
+	bs.sort(a < b)
+	println(bs)
+	assert '$bs' == '[`a`, `b`, `c`, `d`, `e`, `f`]'
+}
+
+fn test_sort_by_different_order_of_a_b() {
+	mut x := [1, 2, 3]
+	x.sort(a < b)
+	println(x)
+	assert x == [1, 2, 3]
+
+	mut y := [1, 2, 3]
+	y.sort(b < a)
+	println(y)
+	assert y == [3, 2, 1]
+}
+
+fn test_f32_sort() {
+	mut f := [f32(50.0), 15, 1, 79, 38, 0, 27]
+	f.sort()
+	assert f[0] == 0.0
+	assert f[1] == 1.0
+	assert f[6] == 79.0
+}
+
+fn test_f64_sort() {
+	mut f := [50.0, 15, 1, 79, 38, 0, 27]
+	f.sort()
+	assert f[0] == 0.0
+	assert f[1] == 1.0
+	assert f[6] == 79.0
+}
+
+fn test_i64_sort() {
+	mut f := [i64(50), 15, 1, 79, 38, 0, 27]
+	f.sort()
+	assert f[0] == 0
+	assert f[1] == 1
+	assert f[6] == 79
+}
+
+/*
+fn test_for_last() {
+	numbers := [1, 2, 3, 4]
+	mut s := '['
+	for num in numbers {
+		s += '$num'
+		if !last {
+			s += ', '
+
+		}
+	}
+	s += ']'
+	assert s == '[1, 2, 3, 4]'
+}
+*/
+struct Foo {
+mut:
+	bar []int
+}
+
+fn test_in_struct() {
+	mut baz := Foo{
+		bar: [0, 0, 0]
+	}
+	baz.bar[0] += 2
+	baz.bar[0]++
+	assert baz.bar[0] == 3
+}
+
+[direct_array_access]
+fn test_direct_modification() {
+	mut foo := [2, 0, 5]
+	foo[1] = 3
+	foo[0] *= 7
+	foo[1]--
+	foo[2] -= 2
+	assert foo[0] == 14
+	assert foo[1] == 2
+	assert foo[2] == 3
+}
+
+fn test_bools() {
+	println('test b')
+	mut a := [true, false]
+	a << true
+	println(a)
+}
+
+fn test_push_many_self() {
+	mut actual_arr := [1, 2, 3, 4]
+	actual_arr << actual_arr
+	expected_arr := [1, 2, 3, 4, 1, 2, 3, 4]
+	assert actual_arr.len == expected_arr.len
+	for i in 0 .. actual_arr.len {
+		assert actual_arr[i] == expected_arr[i]
+	}
+}
+
+fn test_for() {
+	nums := [1, 2, 3]
+	mut sum := 0
+	for num in nums {
+		sum += num
+	}
+	assert sum == 6
+}
+
+fn test_clear() {
+	mut arr := [1, 2, 3]
+	assert arr.len == 3
+	arr.clear()
+	assert arr.len == 0
+	arr << 3
+	arr << 2
+	arr << 1
+	arr << 0
+	assert arr.len == 4
+	assert arr[0] == 3
+	assert arr[1] == 2
+	assert arr[2] == 1
+	assert arr[3] == 0
+	arr.clear()
+	assert arr.len == 0
+}
+
+fn test_trim() {
+	mut arr := [1, 2, 3, 4, 5, 6, 7, 8, 9]
+	assert arr.len == 9
+	arr.trim(9)
+	assert arr.len == 9
+	assert arr.last() == 9
+	arr.trim(7)
+	assert arr.len == 7
+	assert arr.last() == 7
+	arr.trim(2)
+	assert arr.len == 2
+	assert arr.last() == 2
+}
+
+fn test_hex() {
+	// array hex
+	st := [byte(`V`), `L`, `A`, `N`, `G`]
+	assert st.hex() == '564c414e47'
+	assert st.hex().len == 10
+	st1 := [byte(0x41)].repeat(100)
+	assert st1.hex() == '41'.repeat(100)
+}
+
+fn test_left_shift_precendence() {
+	mut arr := []int{}
+	arr << 1 + 1
+	arr << 1 - 1
+	arr << 2 / 1
+	arr << 2 * 1
+	assert arr[0] == 2
+	assert arr[1] == 0
+	assert arr[2] == 2
+	assert arr[3] == 2
+}
+
+fn test_array_with_cap() {
+	a4 := []int{len: 1, cap: 10}
+	assert a4.len == 1
+	assert a4.cap == 10
+	a5 := []int{len: 1, cap: 10}
+	assert a5.len == 1
+	assert a5.cap == 10
+}
+
+fn test_multi_array_index() {
+	mut a := [][]int{len: 2, init: []int{len: 3, init: 0}}
+	a[0][0] = 1
+	assert '$a' == '[[1, 0, 0], [0, 0, 0]]'
+	mut b := [[0].repeat(3)].repeat(2)
+	b[0][0] = 1
+	assert '$b' == '[[1, 0, 0], [0, 0, 0]]'
+}
+
+fn test_plus_assign_string() {
+	mut a := ['']
+	a[0] += 'abc'
+	assert a == ['abc']
+}
+
+fn mut_arr_with_eq_in_fn(mut a []int) {
+	if a == [1, 2, 3, 4] {
+		a[0] = 0
+	}
+	if [0, 2, 3, 4] == a {
+		a[1] = 0
+	}
+	if !(a != [0, 0, 3, 4]) {
+		a[2] = 0
+	}
+	if !([0, 0, 0, 4] != a) {
+		a[3] = 0
+	}
+}
+
+fn test_mut_arr_with_eq_in_fn() {
+	mut a := [1, 2, 3, 4]
+	mut_arr_with_eq_in_fn(mut a)
+	assert a == [0, 0, 0, 0]
+}
+
+fn array_in_mut(mut a []int) {
+	if 1 in a {
+		a[0] = 2
+	}
+}
+
+fn test_array_in_mut() {
+	mut a := [1, 2]
+	array_in_mut(mut a)
+	assert a == [2, 2]
+}
+
+// test array delete in function with mut argument
+fn delete_nums(mut arr []int) {
+	arr.delete(0)
+}
+
+fn test_array_delete_in_mut() {
+	mut nums := [1, 2, 3]
+	delete_nums(mut nums)
+	assert nums == [2, 3]
+}
+
+// test array add in function with mut argument
+fn add_nums(mut arr []int) {
+	arr << 4
+}
+
+fn test_array_add_in_mut() {
+	mut nums := [1, 2, 3]
+	add_nums(mut nums)
+	assert nums == [1, 2, 3, 4]
+}
+
+fn test_reverse_in_place() {
+	mut a := [1, 2, 3, 4]
+	a.reverse_in_place()
+	assert a == [4, 3, 2, 1]
+	mut b := ['a', 'b', 'c']
+	b.reverse_in_place()
+	assert b == ['c', 'b', 'a']
+	mut c := [[1, 2], [3, 4], [5, 6]]
+	c.reverse_in_place()
+	assert c == [[5, 6], [3, 4], [1, 2]]
+}
+
+fn test_array_int_pop() {
+	mut a := [1, 2, 3, 4, 5]
+	assert a.len == 5
+	x := a.last()
+	y := a.pop()
+	assert x == y
+	assert a.len == 4
+	z := a.pop()
+	assert a.len == 3
+	assert z == 4
+	x1 := a.pop()
+	x2 := a.pop()
+	final := a.pop()
+	assert final == 1
+}
+
+fn test_array_string_pop() {
+	mut a := ['abc', 'def', 'xyz']
+	assert a.len == 3
+	assert a.pop() == 'xyz'
+	assert a.pop() == 'def'
+	assert a.pop() == 'abc'
+	assert a.len == 0
+	assert a.cap == 3
+}
+
+fn test_array_first() {
+	a := [3]
+	assert a.first() == 3
+	b := [1, 2, 3, 4]
+	assert b.first() == 1
+	c := ['abc', 'def']
+	assert c.first()[0] == `a`
+	s := [Chunk{'a'}]
+	assert s.first().val == 'a'
+}
+
+fn test_array_last() {
+	a := [3]
+	assert a.last() == 3
+	b := [1, 2, 3, 4]
+	assert b.last() == 4
+	c := ['abc', 'def']
+	assert c.last()[0] == `d`
+	s := [Chunk{'a'}]
+	assert s.last().val == 'a'
+}
+
+[direct_array_access]
+fn test_direct_array_access() {
+	mut a := [11, 22, 33, 44]
+	assert a[0] == 11
+	assert a[2] == 33
+	x := a[0]
+	a[0] = 21
+	a[1] += 2
+	a[2] = x + 3
+	a[3] -= a[1]
+	assert a == [21, 24, 14, 20]
+}
+
+[direct_array_access]
+fn test_direct_array_access_via_ptr() {
+	mut b := [11, 22, 33, 44]
+	unsafe {
+		mut a := &b
+		assert a[0] == 11
+		assert a[2] == 33
+		x := a[0]
+		a[0] = 21
+		a[1] += 2
+		a[2] = x + 3
+		a[3] -= a[1]
+		assert a == [21, 24, 14, 20]
+	}
+}
+
+fn test_push_arr_string_free() {
+	mut lines := ['hi']
+	s := 'a' + 'b'
+	lines << s
+	// make sure the data in the array is valid after freeing the string
+	unsafe { s.free() }
+	//
+	println(lines)
+	assert lines.len == 2
+	assert lines[0] == 'hi'
+	assert lines[1] == 'ab'
+}
+
+const (
+	grid_size_1 = 2
+	grid_size_2 = 3
+	grid_size_3 = 4
+	cell_value  = 123
+)
+
+fn test_multidimensional_array_initialization_with_consts() {
+	mut data := [][][]int{len: grid_size_1, init: [][]int{len: grid_size_2, init: []int{len: grid_size_3, init: cell_value}}}
+	assert data.len == grid_size_1
+	assert data[0].len == grid_size_2
+	assert data[0][0].len == grid_size_3
+	assert data[0][0][0] == cell_value
+	assert data[1][1][1] == cell_value
+}
+
+fn test_byteptr_vbytes() {
+	unsafe {
+		bp := malloc(5)
+		bp[0] = 1
+		bp[1] = 2
+		bp[2] = 3
+		bp[3] = 4
+		bp[4] = 255
+		bytes := bp.vbytes(5)
+		println(bytes)
+		assert bytes.len == 5
+		assert bytes[0] == 1
+		assert bytes[1] == 2
+		assert bytes[2] == 3
+		assert bytes[3] == 4
+		assert bytes[4] == 255
+	}
+}
+
+fn test_voidptr_vbytes() {
+	unsafe {
+		bp := malloc(3)
+		bp[0] = 4
+		bp[1] = 5
+		bp[2] = 6
+		bytes := voidptr(bp).vbytes(3)
+		assert bytes.len == 3
+		assert bytes[0] == 4
+		assert bytes[1] == 5
+		assert bytes[2] == 6
+		println(bytes)
+	}
+}
+
+fn test_multi_array_prepend() {
+	mut a := [][]int{}
+	a.prepend([1, 2, 3])
+	assert a == [[1, 2, 3]]
+	mut b := [][]int{}
+	b.prepend([[1, 2, 3]])
+	assert b == [[1, 2, 3]]
+}
+
+fn test_multi_array_insert() {
+	mut a := [][]int{}
+	a.insert(0, [1, 2, 3])
+	assert a == [[1, 2, 3]]
+	mut b := [][]int{}
+	b.insert(0, [[1, 2, 3]])
+	assert b == [[1, 2, 3]]
+}
+
+fn test_multi_array_in() {
+	a := [[1]]
+	println([1] in a)
+	assert [1] in a
+}
+
+fn test_any_type_array_contains() {
+	a := [true, false]
+	assert a.contains(true)
+	assert true in a
+	assert a.contains(false)
+	assert false in a
+	b := [i64(2), 3, 4]
+	assert b.contains(i64(3))
+	assert 5 !in b
+	c := [[1], [2]]
+	assert c.contains([1])
+	assert [2] in c
+	assert [3] !in c
+}
+
+struct Person {
+	name string
+	nums []int
+	kv   map[string]string
+}
+
+fn test_struct_array_of_multi_type_in() {
+	ivan := Person{
+		name: 'ivan'
+		nums: [1, 2, 3]
+		kv: map{
+			'aaa': '111'
+		}
+	}
+	people := [Person{
+		name: 'ivan'
+		nums: [1, 2, 3]
+		kv: map{
+			'aaa': '111'
+		}
+	}, Person{
+		name: 'bob'
+		nums: [2]
+		kv: map{
+			'bbb': '222'
+		}
+	}]
+	println(ivan in people)
+	assert ivan in people
+}
+
+fn test_struct_array_of_multi_type_index() {
+	ivan := Person{
+		name: 'ivan'
+		nums: [1, 2, 3]
+		kv: map{
+			'aaa': '111'
+		}
+	}
+	people := [Person{
+		name: 'ivan'
+		nums: [1, 2, 3]
+		kv: map{
+			'aaa': '111'
+		}
+	}, Person{
+		name: 'bob'
+		nums: [2]
+		kv: map{
+			'bbb': '222'
+		}
+	}]
+	println(people.index(ivan))
+	assert people.index(ivan) == 0
+}
+
+struct Coord {
+	x int
+	y int
+	z int
+}
+
+fn test_array_struct_contains() {
+	mut coords := []Coord{}
+	coord_1 := Coord{
+		x: 1
+		y: 2
+		z: -1
+	}
+	coords << coord_1
+	exists := coord_1 in coords
+	not_exists := coord_1 !in coords
+	println('`exists`: $exists and `not exists`: $not_exists')
+	assert exists == true
+	assert not_exists == false
+}
+
+fn test_array_struct_ref_contains() {
+	mut coords := []&Coord{}
+	coord_1 := &Coord{
+		x: 1
+		y: 2
+		z: -1
+	}
+	coords << coord_1
+	exists := coord_1 in coords
+	println(exists)
+	assert exists == true
+}
+
+fn test_array_struct_ref_index() {
+	mut coords := []&Coord{}
+	coord_1 := &Coord{
+		x: 1
+		y: 2
+		z: -1
+	}
+	coords << coord_1
+	println(coords.index(coord_1))
+	assert coords.index(coord_1) == 0
+}
+
+fn test_array_of_array_append() {
+	mut x := [][]int{len: 4}
+	println(x) // OK
+	x[2] << 123 // RTE
+	println(x)
+	assert '$x' == '[[], [], [123], []]'
+}
+
+fn test_array_of_map_insert() {
+	mut x := []map[string]int{len: 4}
+	println(x) // OK
+	x[2]['123'] = 123 // RTE
+	println(x)
+	assert '$x' == "[{}, {}, {'123': 123}, {}]"
+}
+
+fn test_multi_fixed_array_init() {
+	a := [3][3]int{}
+	assert '$a' == '[[0, 0, 0], [0, 0, 0], [0, 0, 0]]'
+}
+
+struct Numbers {
+	odds  []int
+	evens []int
+}
+
+fn test_array_of_multi_filter() {
+	arr := [1, 2, 3, 4, 5]
+	nums := Numbers{
+		odds: arr.filter(it % 2 == 1)
+		evens: arr.filter(it % 2 == 0)
+	}
+	println(nums)
+	assert nums.odds == [1, 3, 5]
+	assert nums.evens == [2, 4]
+}
+
+fn test_array_of_multi_map() {
+	arr := [1, 3, 5]
+	nums := Numbers{
+		odds: arr.map(it + 2)
+		evens: arr.map(it * 2)
+	}
+	println(nums)
+	assert nums.odds == [3, 5, 7]
+	assert nums.evens == [2, 6, 10]
+}
+
+fn test_multi_fixed_array_with_default_init() {
+	a := [3][3]int{init: [3]int{init: 10}}
+	println(a)
+	assert a == [[10, 10, 10]!, [10, 10, 10]!, [10, 10, 10]!]!
+}
+
+struct Abc {
+mut:
+	x i64
+	y i64
+	z i64
+}
+
+fn test_clone_of_same_elem_size_array() {
+	mut arr := []Abc{}
+	arr << Abc{1, 2, 3}
+	arr << Abc{2, 3, 4}
+	arr2 := arr.clone()
+	println(arr2)
+	assert arr2 == [Abc{1, 2, 3}, Abc{2, 3, 4}]
+}
+
+pub fn example<T>(mut arr []T) []T {
+	return arr.clone()
+}
+
+fn test_generic_mutable_arrays() {
+	mut arr := [1, 2, 3]
+	assert example(mut arr) == [1, 2, 3]
+}