12 ms·

The todo keyword https://gleam.run/book/tour/todo.html https://gleam.run/book/tour/todo.html is brilliant. Are there any other languages that have this?

ModernMech 5y ago
Probably based a little on this: https://doc.rust-lang.org/std/macro.todo.html https://doc.rust-lang.org/std/macro.todo.html
_ZeD_ 5y ago
it's not the same, but it's almost idiomatic to leave unfinished python code with "..." (the ellipsis object) def foo(bar, baz): ... is a valid (empty) python function
- senkora 5y ago
  Oh, interesting. I’ve always used “pass” for this.
- staticassertion 5y ago
  Yeah, but this is best used for abstract methods or type stubs. I think in 'real code' you would want to raise NotImplementedError, or even (if you use mypy) potentially return a NoReturn ie: from typing import Any, NoReturn def foo(bar: Any, baz: Any) -> NoReturn: raise NotImplementedError
- toast0 5y ago
  Perl has ellipsis which will die on use.
roebk 5y ago
Elm has `Debug.todo`. If you were to use this, it allows your app to compile in development but the app would crash should it hit this code. Elm's compiler will prevent you from creating a production application with a `Debug.todo` still in place.
ink404 5y ago
kotlin has TODO("reason")
blandflakes 5y ago
AFAIK there's no reason support, but you can make a whole in Scala using ??? as the right-hand side.
the_duke 5y ago
Rust has the `todo!()` macro: https://doc.rust-lang.org/std/macro.todo.html https://doc.rust-lang.org/std/macro.todo.html Haskell has "typed holes": https://downloads.haskell.org/~ghc/7.10.1/docs/html/users_guide/typed-holes.html https://downloads.haskell.org/~ghc/7.10.1/docs/html/users_gu...
brightball 5y ago
You can get a similar effect in Elixir with # TODO comments if you're using Credo. It's just a code comment, but by default Credo will exit non-zero if it sees one so if Credo is part of your CI pipeline it will fail it by default. I'm one of those annoying people who puts # TODO comments all over my code though, so I set Credo so that TODO's wouldn't fail the build.
lalaithion 5y ago
Scala has `???`, which does a similar thing.

ModernMech 5y ago

Probably based a little on this: https://doc.rust-lang.org/std/macro.todo.html https://doc.rust-lang.org/std/macro.todo.html

_ZeD_ 5y ago

it's not the same, but it's almost idiomatic to leave unfinished python code with "..." (the ellipsis object) def foo(bar, baz): ... is a valid (empty) python function

senkora 5y ago
Oh, interesting. I’ve always used “pass” for this.
staticassertion 5y ago
Yeah, but this is best used for abstract methods or type stubs. I think in 'real code' you would want to raise NotImplementedError, or even (if you use mypy) potentially return a NoReturn ie: from typing import Any, NoReturn def foo(bar: Any, baz: Any) -> NoReturn: raise NotImplementedError
toast0 5y ago
Perl has ellipsis which will die on use.

roebk 5y ago

Elm has `Debug.todo`. If you were to use this, it allows your app to compile in development but the app would crash should it hit this code. Elm's compiler will prevent you from creating a production application with a `Debug.todo` still in place.

ink404 5y ago

kotlin has TODO("reason")

blandflakes 5y ago

AFAIK there's no reason support, but you can make a whole in Scala using ??? as the right-hand side.

the_duke 5y ago

Rust has the `todo!()` macro: https://doc.rust-lang.org/std/macro.todo.html https://doc.rust-lang.org/std/macro.todo.html Haskell has "typed holes": https://downloads.haskell.org/~ghc/7.10.1/docs/html/users_guide/typed-holes.html https://downloads.haskell.org/~ghc/7.10.1/docs/html/users_gu...

brightball 5y ago

You can get a similar effect in Elixir with # TODO comments if you're using Credo. It's just a code comment, but by default Credo will exit non-zero if it sees one so if Credo is part of your CI pipeline it will fail it by default. I'm one of those annoying people who puts # TODO comments all over my code though, so I set Credo so that TODO's wouldn't fail the build.

lalaithion 5y ago

Scala has `???`, which does a similar thing.