Consider this code:
---
module test;
struct Foo
{
this( int f ) {
_foo = f;
}
@property int baz() {
return _foo;
}
// alias _foo this;
// alias baz this;
immutable int _foo;
}
struct Bar
{
this( int f ) {
_foo = Foo(f);
}
private:
immutable Foo _foo;
}
---
If I uncomment the alias _foo this line, I get the following error message:
% Test.d(22): Error: can only initialize const member _foo inside
constructor
WTF! I'm initializing it in a constructor! Is this a bug? Or by design you
cannot alias this to a immutable member of a struct. It seems that there's
a hidden temp created that wants to initialize the field. Also, I wanted
to alias the property Foo.baz, but it also caused the following errors:
% Test.d(22): Error: function test.Foo.baz () is not callable using
argument types (Foo) immutable
% Test.d(22): Error: expected 0 arguments, not 1 for non-variadic function
type @property int()
It seems that somehow the property is used as a "setter", not as a
"getter".
So, my questions are:
1. Why is disallowed to alias this an immutable data inside a struct?
2. Why is disallowed to alias this a struct "getter" property?
--
Yao G.
