what is the type returned by regex function?
I want to store a regex member because I need to reuse it multiple times.
Can this be done?


class A {

  protected SomeTypeName regexPattern;


 void load() {
      string str;
      // obtain a regex pattern and store it as str.
      regexPattern = regex( str );
  }

  bool matches() {
    // use regexPattern
 }

}

On Monday, 13 January 2014 at 20:53:55 UTC, Tiberiu Gal wrote:
> what is the type returned by regex function?
> I want to store a regex member because I need to reuse it multiple times.
> Can this be done?
>
>
> class A {
>
>   protected SomeTypeName regexPattern;
>
>
>  void load() {
>       string str;
>       // obtain a regex pattern and store it as str.
>       regexPattern = regex( str );
>   }
>
>   bool matches() {
>     // use regexPattern
>  }
>
> }

The type is a template called Regex that is templated on the character width.

struct A
{
	Regex!char re;
	
	this(string str)
	{
		re = regex(str);
	}
}

There is also std.traits.ReturnType you can use for more complex types or voldemort types.

On Monday, 13 January 2014 at 20:53:55 UTC, Tiberiu Gal wrote:
> what is the type returned by regex function?
> I want to store a regex member because I need to reuse it multiple times.
> Can this be done?
>
>
> class A {
>
>   protected SomeTypeName regexPattern;
>
>
>  void load() {
>       string str;
>       // obtain a regex pattern and store it as str.
>       regexPattern = regex( str );
>   }
>
>   bool matches() {
>     // use regexPattern
>  }
>
> }


It's Regex!char

class A {
   protected Regex!char regexPattern;

...

On Monday, 13 January 2014 at 20:59:28 UTC, Brad Anderson wrote:
> On Monday, 13 January 2014 at 20:53:55 UTC, Tiberiu Gal wrote:
>> what is the type returned by regex function?
>> I want to store a regex member because I need to reuse it multiple times.
>> Can this be done?
>>
>>
>> class A {
>>
>>  protected SomeTypeName regexPattern;
>>
>>
>> void load() {
>>      string str;
>>      // obtain a regex pattern and store it as str.
>>      regexPattern = regex( str );
>>  }
>>
>>  bool matches() {
>>    // use regexPattern
>> }
>>
>> }
>
> The type is a template called Regex that is templated on the character width.
>
> struct A
> {
> 	Regex!char re;
> 	
> 	this(string str)
> 	{
> 		re = regex(str);
> 	}
> }
>
> There is also std.traits.ReturnType you can use for more complex types or voldemort types.

thank you

On Monday, 13 January 2014 at 20:59:28 UTC, Brad Anderson wrote:
>
> There is also std.traits.ReturnType you can use for more complex types or voldemort types.

Or:  typeof(regex(""))

BTW, how does ReturnType handle overloads?

--
Nicolas