Uniform Function Call syntax for properties

[Steven Schveighoffer]

Someone was asking about UFC syntax for properties on d.learn, and I  
realized, we have a huge ambiguity here.

Given a function:

@property int foo(int x)

Is this a global setter or a getter on an int?

i.e.

int y = foo = 3;

or

int y = (3).foo;

???

I know arrays have an issue with property setters, see a bug report I  
filed a while back:

http://d.puremagic.com/issues/show_bug.cgi?id=3857

But that seems like a totally unambiguous case (a global property function  
with two parameters is obviously a setter on the first parameter in UFC).

The getter seems much more problematic.  Does anyone have a solution  
besides adding more syntax?  Should we disallow global properties to avoid  
ambiguity?

-Steve