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|
interface Speaker {
say_hello() string
speak(msg string)
}
struct Boss {
name string
}
fn (b Boss) say_hello() string {
return 'Hello, My name is $b.name and I\'m the bawz'
}
fn (b Boss) speak(msg string) {
println(msg)
}
struct Cat {
name string
breed string
}
fn (c Cat) say_hello() string {
return 'Meow meow $c.name the $c.breed meow'
}
fn (c Cat) speak(msg string) {
println('Meow $msg')
}
struct Baz {
mut:
sp Speaker
}
fn test_interface_struct() {
bz1 := Baz{
sp: Boss{
name: 'Richard'
}
}
assert bz1.sp.say_hello() == "Hello, My name is Richard and I'm the bawz"
print('Test Boss inside Baz struct: ')
bz1.sp.speak('Hello world!')
bz2 := Baz{
sp: Cat{
name: 'Grungy'
breed: 'Persian Cat'
}
}
assert bz2.sp.say_hello() == 'Meow meow Grungy the Persian Cat meow'
print('Test Cat inside Baz struct: ')
bz2.sp.speak('Hello world!')
}
fn test_interface_mut_struct() {
mut mbaz := Baz{
sp: Boss{
name: 'Derek'
}
}
assert mbaz.sp.say_hello() == "Hello, My name is Derek and I'm the bawz"
mbaz.sp = Cat{
name: 'Dog'
breed: 'Not a dog'
}
assert mbaz.sp.say_hello() == 'Meow meow Dog the Not a dog meow'
}
fn test_interface_struct_from_array() {
bazs := [
Baz{
sp: Cat{
name: 'Kitty'
breed: 'Catty Koo'
}
},
Baz{
sp: Boss{
name: 'Bob'
}
},
]
assert bazs[0].sp.say_hello() == 'Meow meow Kitty the Catty Koo meow'
assert bazs[1].sp.say_hello() == "Hello, My name is Bob and I'm the bawz"
}
/*
// TODO: fix this too; currently with V 0.1.30 7426544 produces: `V panic: as cast: cannot cast 200 to 197`
fn test_interface_struct_from_mut_array() {
mut bazs := [
Baz{
sp: Cat{
name: 'Kitty'
breed: 'Catty Koo'
}
},
Baz{
sp: Boss{
name: 'Bob'
}
}
]
bazs[0].sp = Boss{
name: 'Ross'
}
bazs[1].sp = Cat{
name: 'Doggy'
breed: 'Doggy Doo'
}
assert bazs[0].sp.say_hello() == 'Hello, My name is Ross and I\'m the bawz'
assert bazs[1].sp.say_hello() == 'Meow meow Doggy the Doggy Doo meow'
}
*/
|
