Line-drawing constants

[Ian Lynagh]

Hi,

On

http://www.opengroup.org/onlinepubs/007908799/xcurses/curses.h.html

it says

    Line-drawing Constants

    The <curses.h> header defines the symbolic constants shown in the
    leftmost two columns of the following table for use in drawing
    lines. The symbolic constants that begin with ACS_ are char
    constants. The symbolic constants that begin with WACS_ are cchar_t
    constants for use with the wide-character interfaces that take a
    pointer to a cchar_t.

However, the ncurses code seems to define ACS_BLOCK etc as elements of
an array that is overwritten with the appropriate values for the
terminal in use. My reading of the specification was that this should
not be allowed, and the obvious acceptable implementation would define
them as integer constants used to index an array at addch time.

My reason for emailing is that I am writing code in Haskell and your
interpretation is making the curses interfacing quite inconvenient. Do
you believe it is a legitimate interpretation of the standard?

If I am looking at the wrong standard then please direct me to the
correct one.


Thanks
Ian