---
import std;
import std.stdio;
struct Foo
{
int a = 0, b = 0;
this(int[2] vars)
{
this.a = vars[0];
this.b = vars[1];
// writeln("constructor called");
}
}
Foo foo = [300,300];
void main()
{
writeln(foo.a);
}
---
Compiles and works OK. I cant see anything in the struct docs
explaining why that array on the right hand side is automatically
converted to a constructor call.
Weird thing is if you un-comment the writeln in the constructor
it wont compile. You get this...
/dlang/dmd/linux/bin64/../../src/phobos/std/stdio.d(4839): Error:
variable impl cannot be modified at compile time
/dlang/dmd/linux/bin64/../../src/phobos/std/stdio.d(3806):
called from here: makeGlobal()
/dlang/dmd/linux/bin64/../../src/phobos/std/stdio.d(3896):
called from here: trustedStdout()
onlineapp.d(13): called from here: writeln("constructor
called")
onlineapp.d(18): called from here: Foo(0, 0).this([300,
300])
How ever if you move Point foo declaration into the main function
it works OK.
What exactly is going on? I mean it looks like the Foo is default
constructed and then constructed on top with a call to the arary
constructor? But why?
Why would putting in the writeln cause it to fail? Is it maybe
trying to create the foo at compile time?
