String mixin syntax sugar

[Mantis]

Hello,

since people discussed a lot about user-defined attributes recently, 
I've been thinking about a way to implement it with a string mixins. The 
problem with them is their syntax - it's far from what we want to use in 
everyday job. I understand, they should be easily distinguished at use 
site, but perhaps this may be accomplished in other ways as well. My 
idea is to translate this kind of statements:

# identifier statement

into this:

mixin( identifier( q{ statement } ) );

where an identifier is a, possibly templated, function that accepts one 
string argument and returns a string. Here are some possible use cases:

#serialize         int a; // marked to be serializable
#serialize!not int b; // -.- non-serializable

#readonly float c; // generate trivial private setter and public getter

#handles!Events.Foo void handler(); // event handler

#attribute!"Foo" void foo(); // function with additional compile-time info

Most of these examples require some D parser, but, since it is planned 
to add parser-generation into Phobos, this shouldn't be a problem.
What do you think, does it have some value for the language, and, if 
yes, is it possible to implement?