Re: __traits(compiles , mixin ... )

[SrMordred via Digitalmars-d-learn]

On Wednesday, 25 October 2017 at 19:25:01 UTC, Adam D. Ruppe 
wrote:
On Wednesday, 25 October 2017 at 19:12:02 UTC, SrMordred wrote:
Maybe i´m tired already, but whats wrong here:
pragma(msg, __traits( compiles, mixin("int x") ) );

You are missing a ;

The mixin must compile as a full thing in context. Variable 
declarations need the ; to be complete.

it returns false anyway.

void F(){
  writeln("inside");
}

struct T{}

void main()
{
        pragma(msg, __traits( compiles, mixin("int x;") ) 
);//false

        pragma(msg, __traits( compiles, mixin("F();") ) );//false
        pragma(msg, __traits( compiles, mixin("F()") ) );//true
        mixin( "F();" ); //compiles
        
        pragma(msg, __traits( compiles, mixin("T();") ) ); //false
        pragma(msg, __traits( compiles, mixin("T()") ) ); // true
	mixin( "T();" ); // Error: `structliteral` has no effect in 
expression `T()`
}