v/vlib/compiler/tests/struct_test.v

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struct A{
mut:
val int
nums []int
}
struct B{
mut:
a A
}
struct C {
mut:
b B
nums []int
aarr []A
num int
}
struct User {
name string
age int
}
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struct Foo {
@type string
}
//We need to make sure that this compiles with all the reserved names.
struct ReservedKeywords {
delete int
exit int
unix int
error int
malloc int
calloc int
free int
panic int
auto int
char int
do int
double int
extern int
float int
inline int
long int
register int
restrict int
short int
signed int
typedef int
unsigned int
void int
volatile int
while int
}
fn test_struct_levels() {
mut c := C{}
assert c.nums.len == 0
c.nums << 3
assert c.nums.len == 1
assert c.nums[0] == 3
c.nums[0] = 4
assert c.nums[0] == 4
c.b.a.val = 34
assert c.b.a.val == 34
c.b.a.nums = [0].repeat(0)
c.b.a.nums << 0
c.b.a.nums << 2
assert c.b.a.nums.len == 2
assert c.b.a.nums[0] == 0
assert c.b.a.nums[1] == 2
c.b.a.nums [0] = 7
assert c.b.a.nums[0] == 7
c.aarr << A{val:8}
assert c.aarr.len == 1
assert c.aarr[0].val == 8
c.num = 20
assert c.num == 20
c.aarr[0].val = 10
assert c.aarr[0].val == 10
}
fn test_struct_str() {
u := User{'Bob', 30}
println(u) // make sure the struct is printable
// assert u.str() == '{name:"Bob", age:30}' // TODO
}
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fn test_at() {
foo := Foo{ @type: 'test' }
println(foo.@type)
}
fn test_reserved_keywords() {
//Make sure we can initialize them correctly using full syntax.
rk_holder := ReservedKeywords{0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}
//Test a few as it'll take too long to test all. If it's initialized
//correctly, other fields are also probably valid.
assert rk_holder.unix == 5
assert rk_holder.while == 3
rk_holder2 := ReservedKeywords{inline: 9, volatile: 11}
//Make sure partial initialization works too.
assert rk_holder2.inline == 9
assert rk_holder2.volatile == 11
assert rk_holder2.while == 0 //Zero value as not specified.
}
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struct User2 {
mut:
name string
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}
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fn test_mutable_fields() {
mut u := User2{}
u.name = 'Peter'
assert u.name == 'Peter'
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}
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struct Def {
a int
b int = 7
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}
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fn test_default_vals() {
d := Def{}
assert d.a == 0
assert d.b == 7
d2 := Def{10, 20}
assert d2.a == 10
assert d2.b == 20
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}
fn test_assoc_with_vars() {
def2 := Def { a: 12 }
merged := { def2 | a: 42 }
assert merged.a == 42
assert merged.b == 7
}
const (
const_def = Def { a: 100 }
)
fn test_assoc_with_constants() {
merged := { const_def | a: 42 }
assert merged.a == 42
assert merged.b == 7
again := { const_def | b: 22 }
assert again.a == 100
assert again.b == 22
}
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struct AttrTest{
a int // private immutable (default)
mut:
b int // private mutable
c int // (you can list multiple fields with the same access modifier)
pub:
d int // public immmutable (readonly)
pub mut:
e int // public, but mutable only in parent module
//__global:
f int // public and mutable both inside and outside parent module
}
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/*
[typedef]
struct C.fixed {
points [10]C.point
}
[typedef]
struct C.point {
x int
y int
}
fn test_fixed_field() {
f := &C.fixed{}
p := f.points[0]
//f.nums[0] = 10
//println(f.nums[0])
println(p.x)
//nums: [10]int
//}
}
*/