Doubt about Struct and members

[matheus]

Hi,

I was doing some tests and this code:

import std;

struct S{
     string[] s = ["ABC"];
     int i = 123;
}

void foo(bool b, string str){
     S t1;

     writeln("t1.s: ", t1.s, ", t1.s.ptr: ", t1.s.ptr, " t1.i: ", 
t1.i);

     if(b){
     	t1.s[0] = str;
     }else{
     	t1.s = [str];
     }

     t1.i = 456;
     S t2;

     writeln("t1.s: ", t1.s, ", t1.s.ptr: ", t1.s.ptr, " t1.i: ", 
t1.i);

     writeln("t2.s: ", t2.s, ", t2.s.ptr: ", t2.s.ptr, " t2.i: ", 
t2.i);
     writeln("");
}

void main(){
     foo(false, "DEF");
     foo(true, "DEF");
     foo(false, "XYZ");
}

Outputs:

t1.s: ["ABC"], t1.s.ptr: 56421C6D7010 t1.i: 123
t1.s: ["DEF"], t1.s.ptr: 7EFC725E6000 t1.i: 456
t2.s: ["ABC"], t2.s.ptr: 56421C6D7010 t2.i: 123

t1.s: ["ABC"], t1.s.ptr: 56421C6D7010 t1.i: 123
t1.s: ["DEF"], t1.s.ptr: 56421C6D7010 t1.i: 456
t2.s: ["DEF"], t2.s.ptr: 56421C6D7010 t2.i: 123

t1.s: ["DEF"], t1.s.ptr: 56421C6D7010 t1.i: 123
t1.s: ["XYZ"], t1.s.ptr: 7EFC725E6020 t1.i: 456
t2.s: ["DEF"], t2.s.ptr: 56421C6D7010 t2.i: 123

As you can see:

     t1.s = [str];

Just changed generated a new address only for t1.s, on the other 
hand:

     t1.s[0] = str;

Changed the value pointed by S.s entirely (The other "instance" 
t2 since points to the same address now has the new value too).

Is this intended?

Matheus.