Debug019

Elm 0.19 moved toString to the Debug module, and renamed crash to todo.

toString : a -> String

Turn any kind of value into a string.

Debug019.toString 42                --> "42"

Debug019.toString [1,2]             --> "[1,2]"

Debug019.toString ('a', "cat", 13)  --> "('a',\"cat\",13)"

Debug019.toString "he said, \"hi\"" --> "\"he said, \\\"hi\\\"\""

Notice that with strings, this is not the identity function. It escapes characters so if you say Html.text (toString "he said, \"hi\"") it will show "he said, \"hi\"" rather than he said, "hi". This makes it nice for viewing Elm data structures.

todo : String -> a

This is a placeholder for code that you will write later.

For example, if you are working with a large union type and have partially completed a case expression, it may make sense to do this:

type Entity = Ship | Fish | Captain | Seagull

drawEntity entity =
  case entity of
    Ship ->
      ...

    Fish ->
      ...

    _ ->
      Debug.todo "handle Captain and Seagull"

The Elm compiler recognizes each Debug.todo so if you run into it, you get an uncatchable runtime exception that includes the module name and line number.

Note: For the equivalent of try/catch error handling in Elm, use modules like Maybe and Result which guarantee that no error goes unhandled!

module Debug019 exposing (toString, todo)

{-| Elm 0.19 moved `toString` to the `Debug` module, and renamed
`crash` to `todo`.

@docs toString, todo

-}


{-| Turn any kind of value into a string.

    Debug019.toString 42                --> "42"

    Debug019.toString [1,2]             --> "[1,2]"

    Debug019.toString ('a', "cat", 13)  --> "('a',\"cat\",13)"

    Debug019.toString "he said, \"hi\"" --> "\"he said, \\\"hi\\\"\""

Notice that with strings, this is not the `identity` function. It escapes
characters so if you say `Html.text (toString "he said, \"hi\"")` it will
show `"he said, \"hi\""` rather than `he said, "hi"`. This makes it nice
for viewing Elm data structures.

-}
toString : a -> String
toString =
    Basics.toString


{-| This is a placeholder for code that you will write later.

For example, if you are working with a large union type and have partially
completed a case expression, it may make sense to do this:

    type Entity = Ship | Fish | Captain | Seagull

    drawEntity entity =
      case entity of
        Ship ->
          ...

        Fish ->
          ...

        _ ->
          Debug.todo "handle Captain and Seagull"

The Elm compiler recognizes each `Debug.todo` so if you run into it, you get
an **uncatchable runtime exception** that includes the module name and line
number.

**Note:** For the equivalent of try/catch error handling in Elm, use modules
like [`Maybe`](#Maybe) and [`Result`](#Result) which guarantee that no error
goes unhandled!

-}
todo : String -> a
todo =
    Debug.crash