Re: string -> string literal

[Timothee Cour via Digitalmars-d-learn]

does that work?
string escapeD(string a){
import std.array:replace;
return `r"`~a.replace(`"`,`" "\"" r"`)~`"`;
}


On Sun, Apr 20, 2014 at 11:14 AM, monarch_dodra via Digitalmars-d-learn <
digitalmars-d-learn@puremagic.com> wrote:

> On Sunday, 20 April 2014 at 17:55:25 UTC, Ellery Newcomer wrote:
>
>> is there a function in phobos anywhere that takes a string and escapes it
>> into a string literal suitable for string mixins? something like
>>
>> assert (f("abc\ndef") == "\"abc\\ndef\"");
>>
>
> It's a bit hackish, but it avoids deploying code and reinventing anything.
> You can use format "string-range" formating to print the string escaped.
> Catch that, and then do it again:
>
> string s = "abc\ndef";
> writefln("[%s]\n", s); //raw
>
> s = format("%(%s%)", [s]);
> writefln("[%s]\n", s); //escaped
>
> s = format("%(%s%)", [s]);
> writefln("[%s]\n", s); //escapes are escaped
>
> As you can see from the output, after two iterations:
>
> [abc
> def]
>
> ["abc\ndef"]
>
> ["\"abc\\ndef\""]
>
> I seem to recall that printing strings "escaped" has been requested
> before, but, AFAIK, this is the best we are currently providing.
>
> Unless you call std.format's "formatElement" directly. However, this is an
> internal and undocumented function, and the fact it isn't private is
> probably an oversight.
>

Re: string -> string literal

[monarch_dodra via Digitalmars-d-learn]

On Sunday, 20 April 2014 at 17:55:25 UTC, Ellery Newcomer wrote:
is there a function in phobos anywhere that takes a string and 
escapes it into a string literal suitable for string mixins? 
something like


assert (f("abc\ndef") == "\"abc\\ndef\"");


It's a bit hackish, but it avoids deploying code and reinventing 
anything. You can use format "string-range" formating to print 
the string escaped. Catch that, and then do it again:


string s = "abc\ndef";
writefln("[%s]\n", s); //raw

s = format("%(%s%)", [s]);
writefln("[%s]\n", s); //escaped

s = format("%(%s%)", [s]);
writefln("[%s]\n", s); //escapes are escaped

As you can see from the output, after two iterations:

[abc
def]

["abc\ndef"]

["\"abc\\ndef\""]

I seem to recall that printing strings "escaped" has been 
requested before, but, AFAIK, this is the best we are currently 
providing.


Unless you call std.format's "formatElement" directly. However, 
this is an internal and undocumented function, and the fact it 
isn't private is probably an oversight.