• Zhuo Nengwen (17/17) Oct 09 2017 import std.stdio;
• Adam D. Ruppe (4/5) Oct 09 2017 That's a function that returns a function.
• Zhuo Nengwen (7/11) Oct 09 2017 I simplified the test codes. I want write mode codes in closure,
• Adam D. Ruppe (5/9) Oct 09 2017 Just remove the =>
• bauss (2/11) Oct 10 2017 Common mistake from people who worked with LINQ in C#.

Zhuo Nengwen <soarowl yeah.net> writes:

import std.stdio;

void test(ushort market, void delegate(ushort market, char* pc) 
callback)
{
     for (auto i = 0; i < 10; i++)
     {
         callback(cast(ushort) i, cast(char*) null);
     }
}

void main()
{
     test(cast(ushort) 1, (m, c) => writeln(m));
     //test(cast(ushort) 1, (m, c) => { writeln(m); });
     test(cast(ushort) 1, (ushort m, char* c) => writeln(m));
     //test(cast(ushort) 1, (ushort m, char* c) => { writeln(m); 
});
}

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

On Monday, 9 October 2017 at 14:34:48 UTC, Zhuo Nengwen wrote:
     //test(cast(ushort) 1, (m, c) => { writeln(m); });

That's a function that returns a function.

Perhaps you meant to just remove the => and be left with a 
multi-line function.

Zhuo Nengwen <soarowl yeah.net> writes:

On Monday, 9 October 2017 at 14:54:33 UTC, Adam D. Ruppe wrote:
     //test(cast(ushort) 1, (m, c) => { writeln(m); });

 That's a function that returns a function.

 Perhaps you meant to just remove the => and be left with a 
 multi-line function.

I simplified the test codes. I want write mode codes in closure, 
such as:

test(cast(ushort) 1, (m, c) => {
   writeln(m);
   writeln(m);
});

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

On Monday, 9 October 2017 at 15:15:48 UTC, Zhuo Nengwen wrote:
 test(cast(ushort) 1, (m, c) => {
   writeln(m);
   writeln(m);
 });

Just remove the =>

(m, c) {
   // code here
}

bauss <jj_1337 live.dk> writes:

On Monday, 9 October 2017 at 15:22:54 UTC, Adam D. Ruppe wrote:
 On Monday, 9 October 2017 at 15:15:48 UTC, Zhuo Nengwen wrote:
 test(cast(ushort) 1, (m, c) => {
   writeln(m);
   writeln(m);
 });

 Just remove the =>

 (m, c) {
   // code here
 }