• Ellery Newcomer (4/4) Apr 20 2014 is there a function in phobos anywhere that takes a string and
• monarch_dodra (21/25) Apr 20 2014 It's a bit hackish, but it avoids deploying code and reinventing
• Timothee Cour via Digitalmars-d-learn (7/32) Apr 21 2014 does that work?

"Ellery Newcomer" <ellery-newcomer utulsa.edu> writes:

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\"");

"monarch_dodra" <monarchdodra gmail.com> writes:

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.

Timothee Cour via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:

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.