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v/vlib/compiler/tests/fn_variadic_test.v

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struct VaTestGroup {
name string
}
// basic
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fn variadic_test(name string, groups ...VaTestGroup) {
assert groups.len == 2
assert groups[0].name == 'users'
assert groups[1].name == 'admins'
}
fn test_fn_variadic() {
group1 := VaTestGroup{name: 'users'}
group2 := VaTestGroup{name: 'admins'}
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variadic_test('joe', group1, group2)
}
// generic
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fn variadic_test_generic<T>(a int, b ...T) T {
b1 := b[0]
b2 := b[1]
return '$a $b1 $b2'
}
fn test_fn_variadic_generic() {
assert variadic_test_generic(111, 'hello', 'v') == '111 hello v'
}
// forwarding
fn variadic_forward_a(a ...string) string {
return variadic_forward_b(a)
}
fn variadic_forward_b(a ...string) string {
a0 := a[0]
a1 := a[1]
a2 := a[2]
return '$a0$a1$a2'
}
fn test_fn_variadic_forward() {
assert variadic_forward_a('a', 'b', 'c') == 'abc'
}
fn variadic_test_no_args(name string, groups ...VaTestGroup) {
assert groups.len == 0
}
fn test_fn_variadic_no_args() {
variadic_test_no_args('marko')
}
struct VaTestStruct {
}
fn (a VaTestStruct) variadic_method(name string, groups ...VaTestGroup) {
assert groups.len == 2
assert groups[0].name == 'users'
assert groups[1].name == 'admins'
}
fn (a VaTestStruct) variadic_method_no_args(name string, groups ...VaTestGroup) {
assert groups.len == 0
}
fn test_fn_variadic_method() {
a := VaTestStruct{}
group1 := VaTestGroup{name: 'users'}
group2 := VaTestGroup{name: 'admins'}
a.variadic_method('marko', group1, group2)
}
fn test_fn_variadic_method_no_args() {
a := VaTestStruct{}
a.variadic_method_no_args('marko')
}