I have got next code:

import std.stdio;
import std.regex;
import std.file;

void main()
{
	auto text = readText("book.txt");
	
	auto inlineCodeBlock = regex("`([^`\n]+)`");
	auto bigCodeBlock = regex(r"`{3}[\s\S]*?`{3}");
	
	foreach(t; text.matchAll(bigCodeBlock))
	{
		string t1 = t.hit.replaceFirst(regex("`"),`<code>`);
		string t2 = t1.replaceFirst(regex("`"),`</code>`);
	}
	
}

Here I am replacing `foo` to <code>foo</code>. But got replaced data as copy, not in original document. But I need to get replacing in original document.

replaceAll is not suitable for it because it's not clear how to get open and close tags (<code> and </code>).

On 07/20/2017 06:39 AM, Suliman wrote:
> I have got next code:
>
> import std.stdio;
> import std.regex;
> import std.file;
>
> void main()
> {
>     auto text = readText("book.txt");
>
>     auto inlineCodeBlock = regex("`([^`\n]+)`");
>     auto bigCodeBlock = regex(r"`{3}[\s\S]*?`{3}");
>
>     foreach(t; text.matchAll(bigCodeBlock))
>     {
>         string t1 = t.hit.replaceFirst(regex("`"),`<code>`);
>         string t2 = t1.replaceFirst(regex("`"),`</code>`);
>     }
>
> }
>
> Here I am replacing `foo` to <code>foo</code>. But got replaced data as
> copy, not in original document. But I need to get replacing in original
> document.
>
> replaceAll is not suitable for it because it's not clear how to get open
> and close tags (<code> and </code>).

It's not guaranteed that the original document have space for the modifications. I recommend outputting to a new place. This one build the output in memory, hoping that it will fit:

import std.stdio;
import std.regex;
import std.array;

void main()
{
    auto text = q"END
first line
```
void main() {
}
```
last line
END";

    auto bigCodeBlock = regex(r"`{3}([\s\S]*?)`{3}");

    auto result = appender!string;
    replaceAllInto(result, text, bigCodeBlock, "<code>$1</code>");
    writeln(result.data);
}

Outputs:

first line
<code>
void main() {
}
</code>
last line

Ali

Question above do not actual now. Now I have got next problem.

import std.stdio;
import std.regex;
import std.file;

void main()
{
    auto text = "#Header
    my header text

    ##SubHeader
    my sub header text

    ###Sub3Header
    my sub 3 text

    #Header2
    my header2 text";

    auto l1 = regex(`(^|\n)#([^#]*)\n([\^]*)(?=\n#[^#]|$)`, ['g', 'm']);

    foreach(t; text.matchAll(l1))
    {
        writeln(t.hit);
    }
}


This code is print to console:

#Header
my header text

How can I modify regex to get it print:

#Header
my header text

##SubHeader
my sub header text

?

I tried different combination, some of them are working in online regexp editors, but do not working in D.

> Ali
Thanks! I opened answer form before you answered me!

There reason of issue above is spaces before "#".

On Friday, 21 July 2017 at 06:19:43 UTC, Suliman wrote:
> There reason of issue above is spaces before "#".

What wrong with next regex https://dpaste.dzfl.pl/024a47ed2a56

I expect that it will select:

#Header
my header text

##SubHeader
my sub header text

Because: ^#{3}

On Friday, 21 July 2017 at 07:08:34 UTC, Suliman wrote:
> On Friday, 21 July 2017 at 06:19:43 UTC, Suliman wrote:
>> There reason of issue above is spaces before "#".
>
> What wrong with next regex https://dpaste.dzfl.pl/024a47ed2a56
>
> I expect that it will select:
>
> #Header
> my header text
>
> ##SubHeader
> my sub header text
>
> Because: ^#{3}

Have you tried https://regex101.com/

It gives you results and explanations about your regex in realtime.

A. Corbi

On Friday, 21 July 2017 at 07:30:07 UTC, Antonio Corbi wrote:
> On Friday, 21 July 2017 at 07:08:34 UTC, Suliman wrote:
>> On Friday, 21 July 2017 at 06:19:43 UTC, Suliman wrote:
>>> There reason of issue above is spaces before "#".
>>
>> What wrong with next regex https://dpaste.dzfl.pl/024a47ed2a56
>>
>> I expect that it will select:
>>
>> #Header
>> my header text
>>
>> ##SubHeader
>> my sub header text
>>
>> Because: ^#{3}
>
> Have you tried https://regex101.com/
>
> It gives you results and explanations about your regex in realtime.
>
> A. Corbi

I tried. But I am getting different behavior in online editor and in the code.

On Friday, 21 July 2017 at 07:42:28 UTC, Suliman wrote:
> On Friday, 21 July 2017 at 07:30:07 UTC, Antonio Corbi wrote:
>> On Friday, 21 July 2017 at 07:08:34 UTC, Suliman wrote:
>>> On Friday, 21 July 2017 at 06:19:43 UTC, Suliman wrote:
>>>> There reason of issue above is spaces before "#".
>>>
>>> What wrong with next regex https://dpaste.dzfl.pl/024a47ed2a56
>>>
>>> I expect that it will select:
>>>
>>> #Header
>>> my header text
>>>
>>> ##SubHeader
>>> my sub header text
>>>
>>> Because: ^#{3}
>>
>> Have you tried https://regex101.com/
>>
>> It gives you results and explanations about your regex in realtime.
>>
>> A. Corbi
>
> I tried. But I am getting different behavior in online editor and in the code.

Could it be related to the regex's 'flavor' you are using?

A. Corbi