Syntax for struct constructors

[Ali Çehreli]

Steve Teale wrote:
 > The D2 structs and unions documentation tells how to define a struct
 > constructor (that's a mouthful). But it doesn't tell how to use it. 
Seems
 > like if you have say
 >
 > struct Bar
 > {
 >     int[] a;
 >     this(uint sz) { a.length = sz; }
 > }
 >
 > you can do either:
 >
 > Bar bar = Bar(256);
 >
 > or:
 >
 > Bar bar;
 > bar = bar(256);

You probably meant Bar(256) on the right hand side? Then it's a struct 
literal.

In any case, even if the produced codes are the same; *I think* the 
latter is actually technically default construction, followed by 
assignment. Which may involve different operations, depending on the 
struct...

 > but it would be nicer if you could just do:
 >
 > Bar bar(256);

I miss that from C++ too. I assumed that there must be reasons related 
to D's syntax for not allowing that.

I've settled to this syntax myself, which is effectively the same as 
your first above:

auto bar = Bar(256);

 >
 > In any case, it should be documented.

Ali