[m-rev.] for review: Add integer.to_base_string.

[Julien Fischer]

Hi,

On Mon, 16 Feb 2015, Peter Wang wrote:

> Add integer.to_base_string.
>
> library/integer.m:
> 	Add to_base_string/2 and to_base_string/3.
>
> tests/general/base_string_to_integer.exp:
> tests/general/base_string_to_integer.m:
> 	Extend test case.
>
> NEWS:
> 	Announce additions.
>
> diff --git a/NEWS b/NEWS
> index bfa7323..d9c8516 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -106,6 +106,8 @@ Changes to the Mercury standard library:
>    - from_base_string/3
>    - to_int/2
>    - det_to_int/1
> +   - to_base_string/2
> +   - to_base_string/3
>
>   The following functions in the integer module have been deprecated:
>
> diff --git a/library/integer.m b/library/integer.m
> index 49d97f7..ef69f01 100644
> --- a/library/integer.m
> +++ b/library/integer.m
> @@ -50,6 +50,16 @@
>     %
> :- func to_string(integer) = string.
>
> +    % to_base_string(Integer, Base, String):
> +    %
> +    % Convert an integer to a string in a given Base.
> +    %
> +    % Base must be between 2 and 36, both inclusive; if it isn't,

s/isn't/is not/

> +    % the predicate will throw an exception.
> +    %
> +:- func to_base_string(integer, int) = string.
> +:- pred to_base_string(integer::in, int::in, string::out) is det.

Is it worth providing a predicate version of this?

The rest looks fine.

Cheers,
Julien.