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|
fn foo() string {
println('foo()')
return 'foo'
}
fn foo2() string {
println('start')
defer {
println('defer')
}
defer {
println('defer2')
}
println('end')
return foo()
}
fn test_defer() {
assert foo2() == 'foo'
}
fn set_num(i int, mut n Num) {
defer {
println('exiting')
n.val++
}
println('Hi')
if i < 5 {
return
} else {
n.val++
}
}
fn set_num_opt(mut n Num) ?int {
defer {
n.val = 1
}
return 99
}
struct Num {
mut:
val int
}
fn (n Num) add(i int) int {
return n.val + i
}
fn test_defer_early_exit() {
mut sum := Num{0}
for i in 0 .. 10 {
set_num(i, mut sum)
}
println('sum: $sum.val')
assert sum.val == 15
}
fn test_defer_option() {
mut ok := Num{0}
set_num_opt(mut ok) or {}
assert ok.val == 1
}
fn test_defer_with_anon_fn() {
mut f := &Num{
val: 110
}
defer {
assert f.add(1) == 111
}
go fn () {
defer {
println('deferred 1')
}
}()
x := fn () {
defer {
println('defered 2')
}
return
}
x()
return
}
fn set_num_if(mut n Num, v int, cond bool) {
if cond {
defer {
n.val = v
}
}
}
fn test_defer_with_if() {
mut n := Num{0}
set_num_if(mut n, 10, true)
assert n.val == 10
set_num_if(mut n, 20, false)
assert n.val == 10
}
fn test_defer_order() {
mut i := 0
defer {
i++
assert i == 3
}
defer {
i++
assert i == 2
}
defer {
i++
assert i == 1
}
}
fn test_defer_access() {
if true {
mut i := 0
defer {
i++
assert i == 1
}
}
}
fn test_defer_arrays() {
mut ia := []int{}
defer {
ia << 1
}
}
fn test_defer_str_interpol() {
mut t := []string{}
defer {
t << 'test'
t << '${t[0]}'
}
}
fn test_defer_not_change_return_values() {
assert num() == 10
}
fn num() int {
mut ret := 10
defer {
ret = 20
}
return ret
}
|
