mixin template scope inconsistency?

[Timothee Cour via Digitalmars-d-learn]

Template mixin scope seems to have a weird behavior:
I don't understand 'WEIRD(1)' and 'WEIRD(2)' below.

import std.stdio;
struct A{
  int b;
  this(int b){
this.b=b;
writeln(A.begin);
  }
  ~this(){
writeln(A.end);
  }
}

mixin template Entry(){
  auto a=A(12);
}

void test1(){
  writeln(test.begin);
  mixin Entry;
  writeln(a.b);//WEIRD! destructor has been called but a.b is still alive
  writeln(test.end);
}

void test2(){
  writeln(test.begin);
  auto a=A(0);
  writeln(test.end);
}

void test3(){
  writeln(test.begin);
  mixin(auto a=A(0););
  writeln(test.end);
}

void main(){
  test1;
  writeln;
  test2;
  writeln;
  test3;
}

output:

test.begin
A.begin
A.end //WEIRD(1): why is destructor called before test.end?
12 //WEIRD(2): destructor has been called but a.b is still alive
test.end

test.begin
A.begin
test.end
A.end

test.begin
A.begin
test.end
A.end

Re: mixin template scope inconsistency?

[Timothee Cour via Digitalmars-d-learn]

posted as bugzilla/14243. Am I misunderstanding something here?

On Tue, Mar 3, 2015 at 10:20 PM, Timothee Cour thelastmamm...@gmail.com
wrote:

 Template mixin scope seems to have a weird behavior:
 I don't understand 'WEIRD(1)' and 'WEIRD(2)' below.

 import std.stdio;
 struct A{
   int b;
   this(int b){
 this.b=b;
 writeln(A.begin);
   }
   ~this(){
 writeln(A.end);
   }
 }

 mixin template Entry(){
   auto a=A(12);
 }

 void test1(){
   writeln(test.begin);
   mixin Entry;
   writeln(a.b);//WEIRD! destructor has been called but a.b is still alive
   writeln(test.end);
 }

 void test2(){
   writeln(test.begin);
   auto a=A(0);
   writeln(test.end);
 }

 void test3(){
   writeln(test.begin);
   mixin(auto a=A(0););
   writeln(test.end);
 }

 void main(){
   test1;
   writeln;
   test2;
   writeln;
   test3;
 }

 output:
 
 test.begin
 A.begin
 A.end //WEIRD(1): why is destructor called before test.end?
 12 //WEIRD(2): destructor has been called but a.b is still alive
 test.end

 test.begin
 A.begin
 test.end
 A.end

 test.begin
 A.begin
 test.end
 A.end