How about "inline" for manifest constants?

[Robert Fraser]

Russell Lewis wrote:
> inline int x = 3;
> 
> Where the "inline" keyword means "the compiler is free to not allocate 
> any storage for this constant."  In particular, this means that it would 
> be a syntax error to either:
>     1) Take the address of an inline constant
>     2) Change its value
> 
> Whether or not the compiler actually inlines all instances or not is 
> implementation-specific.

You mean semantic error? But now we're just talking semantics...

Anyways, it's a good idea.