BetterC + startsWith

[Paul Backus]

On Saturday, 22 February 2020 at 02:01:25 UTC, SrMordred wrote:
> //-betterC
> import core.stdc.stdio;
> import std.algorithm;
>
> void main(){
>     printf( "%d\n",startsWith("a","b") );
> }
>
> //Fails to compile with betterC, dmd/ldc2 last versions.
>
> Any reason for not work with betterC or should i file the issue 
> ?
> (Find this on a bindbc lib, so i think that it may have worked 
> previously)

The issue is that strings aren't input ranges in betterC [1], due 
to autodecoding.

Normally you'd work around this using std.utf.byCodeUnit, but 
that's currently broken, because std.utf attempts to import 
core.exception.UnicodeException from druntime at module scope 
[2], causing any betterC program that imports std.utf to fail 
compilation.

So, for now, I think the best you can do is probably to 
copy-paste byCodeUnit into its own source file, and use that 
until std.utf is fixed.

[1] https://issues.dlang.org/show_bug.cgi?id=20139
[2] 
https://github.com/dlang/phobos/blob/7a656e09d23507d0c404dabaa2c440a45e7c753d/std/utf.d#L65