mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
100 lines
1.2 KiB
V
100 lines
1.2 KiB
V
type Node = Expr | string
|
|
type Expr = IfExpr | IntegerLiteral
|
|
|
|
struct IntegerLiteral {}
|
|
|
|
struct IfExpr {
|
|
pos int
|
|
}
|
|
|
|
struct NodeWrapper {
|
|
node Node
|
|
}
|
|
|
|
fn test_nested_sumtype_match_selector() {
|
|
c := NodeWrapper{Node(Expr(IfExpr{
|
|
pos: 1
|
|
}))}
|
|
match c.node {
|
|
Expr {
|
|
match c.node {
|
|
IfExpr {
|
|
assert c.node.pos == 1
|
|
}
|
|
else {
|
|
assert false
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
assert false
|
|
}
|
|
}
|
|
}
|
|
|
|
fn test_nested_sumtype_match() {
|
|
c := Node(Expr(IfExpr{
|
|
pos: 1
|
|
}))
|
|
match c {
|
|
Expr {
|
|
match c {
|
|
IfExpr {
|
|
assert c.pos == 1
|
|
}
|
|
else {
|
|
assert false
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
assert false
|
|
}
|
|
}
|
|
}
|
|
|
|
struct Milk {
|
|
mut:
|
|
name string
|
|
}
|
|
|
|
struct Eggs {
|
|
mut:
|
|
name string
|
|
}
|
|
|
|
type Food = Eggs | Milk
|
|
|
|
struct FoodWrapper {
|
|
mut:
|
|
food Food
|
|
}
|
|
|
|
fn test_match_mut() {
|
|
mut f := Food(Milk{'test'})
|
|
match mut f {
|
|
Eggs {
|
|
f.name = 'eggs'
|
|
assert f.name == 'eggs'
|
|
}
|
|
Milk {
|
|
f.name = 'milk'
|
|
assert f.name == 'milk'
|
|
}
|
|
}
|
|
}
|
|
|
|
fn test_match_mut_selector() {
|
|
mut f := FoodWrapper{Food(Milk{'test'})}
|
|
match mut f.food {
|
|
Eggs {
|
|
f.food.name = 'eggs'
|
|
assert f.food.name == 'eggs'
|
|
}
|
|
Milk {
|
|
f.food.name = 'milk'
|
|
assert f.food.name == 'milk'
|
|
}
|
|
}
|
|
}
|