v2 / vlib / v / tests / options / option_var_cast_test.v
61 lines · 52 sloc · 1.12 KB · 5be2fcab7bb566124c7f8ef50cbffe0690595487
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1type SumType = f64 | int


2


3type MyByte = u8


4


5struct Struct {


6    a int


7}


8


9type Alias = int


10


11fn test_main() {


12    arr := [1, 2, 3]


13    mut t := ?[]int([]int{len: 10, init: 2})


14    assert t != none


15    t = ?[]int(arr)


16    assert t != none


17    t = ?[]int([]int{len: 1, init: 0})


18    assert t != none


19


20    mut t2 := ?int(1)


21    assert t2 != none


22    mut t3 := ?f64(1.2)


23    assert t3 != none


24    mut t4 := ?string('')


25    assert t4 != none


26    mut t5 := ?SumType(1)


27    assert t5 != none


28    mut t6 := ?SumType(none)


29    assert t6 == none


30    mut t7 := ?Struct(Struct{})


31    assert t7 != none


32}


33


34fn test_cast() {


35    var := ?u8(1)


36    println(?u8(var))


37    println(?u8(?u8(255)))


38    println(?int(none))


39    println(?int(var?))


40


41    a := ?Struct{}


42    assert a == none


43    b := ?Struct(Struct{})


44    assert b != none


45


46    mut v1 := ?bool(1)


47    assert v1?.str() == 'true'


48    v1 = ?bool(true)


49    assert v1?.str() == 'true'


50    v1 = ?bool(0)


51    assert v1?.str() == 'false'


52    v1 = ?bool(false)


53    assert v1?.str() == 'false'


54}


55


56fn test_cast_alias() {


57    assert '${?MyByte(0)}' == 'Option(MyByte(0))'


58    assert '${?MyByte(255)}' == 'Option(MyByte(255))'


59    assert '${?MyByte(?u8(0))}' == 'Option(MyByte(0))'


60    assert '${?MyByte(?u8(255))}' == 'Option(MyByte(255))'


61}


62