for.sb

import assert

as = assert.Assert

a = 1

i = 0
for a {
    as(1, a)
    i += 1
    if i > 3 {
        a = 0
    }
}

as(0, a)

l = ["a", "b", "c", "d", "e"]

idx = 0
for i, e in l {
    if idx == 0 {
        as(0, i)
        as("a", e)
    } elif idx == 1 {
        as(1, i)
        as("b", e)
    } elif idx == 2 {
        as(2, i)
        as("c", e)
    } elif idx == 3 {
        as(3, i)
        as("d", e)
    } elif idx == 4 {
        as(4, i)
        as("e", e)
    } else {
        print("must not come here")
        exit(1)
    }
    idx += 1
}

as(5, idx)

for i, e in [] {
    print("must not come here")
    exit(1)
}

idx = 0
for i, e in "abc" {
    if idx == 0 {
        as(0, i)
        as("a", e)
    } elif idx == 1 {
        as(1, i)
        as("b", e)
    } elif idx == 2 {
        as(2, i)
        as("c", e)
    } else {
        print("must not come here")
        exit(1)
    }
    idx += 1
}

a = 0
for i, e in l {
    a = e
    if i == 2 {
        break
    }
}
as("c", a)

for i, e in l {
    continue
    print("must not come here")
    exit(1)
}

print("for test succeeded")