I get

    core.exception.UnicodeException@src/rt/util/utf.d(290):

in a call to

    std.string.tr(x, `_`, ` `)

for a badly encode string x. Is it really needed to do auto-decoding here?

Isn't the encoding of underscore and space uniquely one by byte in UTF-8?

What do I need to do/add to avoid auto-decoding here?

V Tue, 13 Jan 2015 12:32:15 +0000
"Nordlöw" via Digitalmars-d-learn <digitalmars-d-learn@puremagic.com>
napsáno:

> I get
> 
>      core.exception.UnicodeException@src/rt/util/utf.d(290):
> 
> in a call to
> 
>      std.string.tr(x, `_`, ` `)
> 
> for a badly encode string x. Is it really needed to do auto-decoding here?
> 
> Isn't the encoding of underscore and space uniquely one by byte in UTF-8?
> 
> What do I need to do/add to avoid auto-decoding here?

std.array.replace(x, `_`, ` `);

On Tuesday, 13 January 2015 at 13:01:56 UTC, Daniel Kozák via Digitalmars-d-learn wrote:
>> What do I need to do/add to avoid auto-decoding here?
>
> std.array.replace(x, `_`, ` `);

Thanks! What about adding See alsos in the docs that relate these two with respect to auto-decoding?

On Tuesday, 13 January 2015 at 20:30:16 UTC, Nordlöw wrote:
> On Tuesday, 13 January 2015 at 13:01:56 UTC, Daniel Kozák via Digitalmars-d-learn wrote:
>>> What do I need to do/add to avoid auto-decoding here?
>>
>> std.array.replace(x, `_`, ` `);
>
> Thanks! What about adding See alsos in the docs that relate these two with respect to auto-decoding?

I am not sure, it doesn`t exactly do the same. And to be fair std.array.replace use internaly std.algorithm.find which use in some scenario auto-decoding. So to be sure no autodecoding occured you must used something like that:

    string x = "some_text";
    auto res = std.array.replace(cast(byte[])x, [byte('_')], [byte(' ')]);
    writeln(cast(string)res);