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|
fn f(n int) ?int {
if n < 0 {
return error('negative arg')
}
return n
}
fn test_lhs_option() {
mut a := [0, 1, 2, 3, 4]
a[f(-1) or { 2 }] = 7
assert a == [0, 1, 7, 3, 4]
}
fn ret_no_opt(n int) int {
return f(n) or { panic(err.msg) }
}
fn test_opt_return_no_opt() {
aa := ret_no_opt(3)
assert aa == 3
}
fn test_range_for_and_array_push() {
mut a := []int{}
for n in f(-3) or { -1 } .. f(3) or { 12 } {
a << f(n) or { -5 }
}
assert a == [-5, 0, 1, 2]
}
fn test_channel_push() {
ch := chan f64{cap: 2}
ch <- 12.25
ch.close()
mut res := []f64{cap: 3}
for _ in 0 .. 3 {
res << <-ch or { -6.75 }
}
assert res == [12.25, -6.75, -6.75]
}
fn test_thread_wait() {
thrs := [
go f(3),
go f(-7),
go f(12),
]
mut res := []int{cap: 3}
for t in thrs {
res << t.wait() or { -13 }
}
assert res == [3, -13, 12]
}
fn test_nested_opt() {
a := f(f(f(-3) or { -7 }) or { 4 }) or { 17 }
assert a == 4
}
fn foo() ?string {
return 'hi'
}
fn test_opt_subexp_field() ? {
assert foo() ?.len == 2
}
|
