1 files changed, 159 insertions, 0 deletions
diff --git a/v_windows/v/old/vlib/v/tests/cross_assign_test.v b/v_windows/v/old/vlib/v/tests/cross_assign_test.v
new file mode 100644
index 0000000..43014a1
--- /dev/null
+++ b/v_windows/v/old/vlib/v/tests/cross_assign_test.v
@@ -0,0 +1,159 @@
+// Test cross assign of array elements
+fn test_cross_assign_of_array() {
+	mut a := [0, 1]
+	a[0], a[1] = a[1], a[0]
+	assert a[0] == 1
+	assert a[1] == 0
+
+	mut b1 := [1, 2, 3]
+	mut b2 := 4
+	b1[2], b2, b1[0] = b1[0], b1[2], 5
+	assert b1 == [5, 2, 1]
+	assert b2 == 3
+}
+
+// Test cross assign of array elements in function
+fn foo1(mut arr []int) {
+	arr[0], arr[1] = arr[1], arr[0]
+}
+
+fn test_cross_assign_of_array_in_fn() {
+	mut arr := [1, 2]
+	foo1(mut arr)
+	assert arr[0] == 2
+	assert arr[1] == 1
+}
+
+// Test cross assign of map values
+fn test_cross_assign_of_map() {
+	mut a := map{
+		'one': 1
+		'two': 2
+	}
+	a['one'], a['two'] = a['two'], a['one']
+	println(a)
+	assert a['one'] == 2
+	assert a['two'] == 1
+}
+
+// Test cross assign of map values in function
+fn foo2(mut a map[string]int) {
+	a['one'], a['two'] = a['two'], a['one']
+}
+
+fn test_cross_assign_of_map_in_fn() {
+	mut a := map{
+		'one': 1
+		'two': 2
+	}
+	foo2(mut a)
+	assert a['one'] == 2
+	assert a['two'] == 1
+}
+
+// Test cross assign of struct fields
+struct Zoo {
+mut:
+	a int
+	b int
+}
+
+fn test_cross_assign_of_struct() {
+	mut x := Zoo{
+		a: 1
+		b: 2
+	}
+	x.a, x.b = x.b, x.a
+	// println(x)
+	assert x.a == 2
+	assert x.b == 1
+}
+
+// Test cross assign of struct fields in function
+struct Foo {
+mut:
+	a int
+	b int
+}
+
+fn foo3(mut f Foo) {
+	f.a, f.b = f.b, f.a
+}
+
+fn test_cross_assign_of_struct_in_fn() {
+	mut a := Foo{
+		a: 1
+		b: 2
+	}
+	foo3(mut a)
+	println(a)
+	assert a.a == 2
+	assert a.b == 1
+}
+
+// Test cross assign of mixed types
+fn test_cross_assign_of_mixed_types() {
+	mut a := [0, 1]
+	mut m := map{
+		'one': 1
+		'two': 2
+	}
+	mut x := Zoo{
+		a: 1
+		b: 2
+	}
+
+	a[0], m['one'], x.a, a[1], m['two'], x.b = a[1], m['two'], x.b, a[0], m['one'], x.a
+
+	assert a == [1, 0]
+	assert m['one'] == 2
+	assert m['two'] == 1
+	assert x.a == 2
+	assert x.b == 1
+}
+
+// Test cross assign of mixed types in function
+fn foo(mut a []int, mut m map[string]int, mut x Zoo) {
+	a[0], m['one'], x.a, a[1], m['two'], x.b = a[1], m['two'], x.b, a[0], m['one'], x.a
+}
+
+fn test_cross_assign_of_mixed_types_in_fn() {
+	mut a := [0, 1]
+	mut m := map{
+		'one': 1
+		'two': 2
+	}
+	mut x := Zoo{
+		a: 1
+		b: 2
+	}
+
+	foo(mut a, mut m, mut x)
+
+	assert a == [1, 0]
+	assert m['one'] == 2
+	assert m['two'] == 1
+	assert x.a == 2
+	assert x.b == 1
+}
+
+// Test cross assign of complex types
+fn test_cross_assign_of_complex_types() {
+	mut a := [0, 1]
+	mut m := map{
+		'one': 1
+		'two': 2
+	}
+	mut x := Zoo{
+		a: 1
+		b: 2
+	}
+
+	a[0], m['one'], x.a, a[1], m['two'], x.b = a[1] + 1, -m['two'], x.b, a[0] * 2, m['one'] * 3, x.a - x.b
+
+	assert a == [2, 0]
+	assert m['one'] == -2
+	assert m['two'] == 3
+	assert x.a == 2
+	assert x.b == -1
+}