What is the term for a function that can be CTFEed?

[BCS]

Hello BCS,

> We have pure functions, member functions, static functions and global
> functions; but what kind of function can always be used with CTFE?
> 

Compile Time Evaluable Function = CTEF? (sounds like CDEF; so testing many 
minor variant of one you get AB CTEF testing :b )

Or not.

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