On Tuesday, 12 January 2016 at 17:03:49 UTC, Ali Çehreli wrote:
On 01/12/2016 08:55 AM, ParticlePeter wrote:
> I have a function "otherFunc" which takes a function with
lots of
> parameters as argument:
>
> void otherFunc( void function( ref int p1, float p2, ubyte
p3, ... ) mf );
Ok.
> otherFunc( void function( ref int p1, float p2, ubyte p3 ) {
myCode; } );
Ok.
> alias MF = void function( ref int p1, float p2, ubyte p3 );
Ok.
> I can rewrite the definition of otherFunc like this:
> void otherFunc( MF mf );
That has the same problem of trying to do this for int:
void foo(int i) {
}
void main() {
foo(int 42); // <-- ERROR
}
But you can do this:
foo(int(42)); // (Relatively new syntax in D.)
> But I cannot pass an anonymous function to otherFunc like
this:
> otherFunc( MF { myCode; } );
It works with the parentheses as it does for int:
alias MF = void function( ref int p1, float p2, ubyte p3 );
void otherFunc( MF mf ) {
}
void main() {
otherFunc(MF((ref int, float, ubyte){ })); // <-- Parens
}
O.K. so I conclude that writing:
void main() {
otherFunc(MF { });
}
is not possible. At least not with alias, maybe with templates or
mixins?
In essence something like C #define as in:
#define MF function( ref int p1, float p2, ubyte p3 )
Is there some such way?
