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Added a few examples

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Vyacheslav Egorov 2021-07-06 21:34:28 +03:00
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docs/_posts/2021-06-30-luau-recap-june-2021.md
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@ -23,6 +23,28 @@ This framework is extensible and we have plans for future improvements with `a =
It is now also possible to get better type information inside `else` blocks of an `if` statement.
A few examples to see the constraint resolver in action:
```lua
function say_hello(name: string?)
-- extra parentheses were enough to trip the old typechecker
if (name) then
print("Hello " .. name .. "!")
else
print("Hello mysterious stranger!")
end
end
```
```lua
function say_hello(name: string?, surname: string?)
-- but now we handle that and more complex expressions as well
if not (name and surname) then
print("Hello mysterious stranger!")
else
print("Hello " .. name .. " " .. surname .. "!")
end
end
```
## Typechecking improvements
We have improved the way we handled module `require` calls. Previously, we had a simple pattern match on the `local m = require(...)` statement, but now we have replaced it with a general handling of the function call in any context.