• Danni Coy (12/12) May 24 2020 can anybody tell me why
• =?UTF-8?Q?Ali_=c3=87ehreli?= (5/16) May 25 2020 alias this is for implicit conversion, which requires an object to
• Adam D. Ruppe (4/7) May 25 2020 alias this only applies if you already have an object.
• lalit.singhh (1/13) May 25 2020

Danni Coy <danni.coy gmail.com> writes:

can anybody tell me why

struct S
{
    int x;
    alias x this;
}

void test()
{
    S s;
    s = 8; // this works
    S s = 8 // but this does not?
}

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 5/24/20 6:35 PM, Danni Coy wrote:> can anybody tell me why
 struct S
 {
      int x;
      alias x this;
 }

 void test()
 {
      S s;
      s = 8; // this works
      S s = 8 // but this does not?
 }

alias this is for implicit conversion, which requires an object to 
convert from. The second case above is about constructing an object.

That's probably why it works that way.

Ali

Adam D. Ruppe <destructionator gmail.com> writes:

On Monday, 25 May 2020 at 01:35:47 UTC, Danni Coy wrote:
     s = 8; // this works
     S s = 8 // but this does not?
 }

alias this only applies if you already have an object. 
Construction is too soon.

You can add a constructor to make that work though.

lalit.singhh <lalit.singhh007 gmail.com> writes:

On Monday, 25 May 2020 at 01:35:47 UTC, Danni Coy wrote:
 can anybody tell me why

 struct S
 {
     int x;
     alias x this;
 }

 void test()
 {
     S s;
     s = 8; // this works
     S s = 8 // but this does not?
 }