control-flow.md

Control Flow

if / else

if (x > 0)
    DoA();
else
    DoB();

if (x > 0) then
    DoA()
else
    DoB()
end

while

while (count > 0)
{
    count -= 1;
}

while (count > 0) do
    count = (count - 1)
end

for

for (int i = 0; i < 10; i++)
{
    Process(i);
}

local i = 0
while (i < 10) do
    Process(i)
    i = (i + 1)
end

foreach over array

foreach (var item in items)
{
    Use(item);
}

for _, item in ipairs(items) do
    Use(item)
end

foreach over List<T>

foreach (var item in list)
{
    Use(item);
}

for i = 1, SF__.ListCount__(list) do
    local item = SF__.ListGet__(list, i)
    Use(item)
end

foreach over Dictionary<K,V>

foreach (var kv in dict)
{
    Use(kv.Key, kv.Value);
}

for _, kv__ in ipairs(SF__.DictKeys__(dict)) do
    local kv__key = kv__
    local kv__val = SF__.DictGet__(dict, kv__)
    Use(kv__key, kv__val)
end

switch

switch on integer and string values is supported. Each section must end with break or return. Fall-through (no break/return) produces a transpiler error.

switch (x)
{
    case 1:
        DoA();
        break;
    case 2:
        DoB();
        break;
    default:
        DoC();
        break;
}

if (x == 1) then
    DoA()
elseif (x == 2) then
    DoB()
else
    DoC()
end

break / continue

break and continue are supported inside while, for, and foreach. continue lowers to a goto continue__ jump.

Unsupported

do...while, goto (other than internal continue__), labeled statements, and switch with fall-through produce a transpiler error.