C constant expressions proposals

[Gabriel Dos Reis]

"Joseph S. Myers" <jsm@polyomino.org.uk> writes:

| The part at the end remains just dealing with the grammar productions 
| using __real__ and __imag__.

The bit I'm not happy with is:

    E.float_constant := false

it should be  

    E.float_constant := E1.float_constant

augmented with

   E.bad_operator := false
   E.overflow := E1.overflow


-- Gaby