Writing unicode characters

Learning
1

Hi !

I’m trying to right a unicode character in a string. However, the compiler will not let me :frowning:

let s = "\u{1D11E}"

yields

let s = "\u{1D11E}",
         ^^
Warning 14: illegal backslash escape in string.

However, this is not an illegal backslash is it ?

I know I could just copy paste the actual unicode character, but I find it less readable since my editor doesn’t show them

It’s becoming very frustrating because I can’t find a way of making this work, and even (flags -w -14) will not disable the warning for some reason…

I’m thankful for any help

2

The notation \u{...} was only added in OCaml 4.06.0, you probably need to update your OCaml version.

3

Sorry I forgot to mention that I’m using ocaml 4.08.1, so that’s not it unfortunately

4

You should check the version of the compiler that you are using then (do you have an older system compiler installed for instance?). Your code compiles fine with 4.08.1 .

1 Like
5

Oh god.
I am indeed using OCaml 4.8.1, but… with reason syntax on this one. This is my first time using Reason, I just assumed it would be the same. But the lexer was forked before 4.06, so it doesn’t have it ! This also explains why the -w -14 flag will not do anything

Thank you for your answer !!

6

This is indeed an issue on the Reason bug tracker: https://github.com/facebook/reason/issues/2337