Date: Sat, 18 Jun 94 15:23:16 JST
From: Stephen Turnbull <turnbull AT shako DOT sk DOT tsukuba DOT ac DOT jp>
To: js1 AT chclu DOT chemie DOT uni-konstanz DOT de
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: grxfont in C++


In C, enums are ints AFAIK.  They can be assigned back and forth, no
problem.  In C++, again AFAIK, enum tags are types *different* from
other integral types.  If this is your problem, there will be an
enumeration of allowed colors, probably called txo_color or something
like that, and you must either cast the integer constants to that type
or (preferably)) use the enumerators defined there.
    I don't know grxfont from a hole-in-the-ground, but this is the
only case I can think of where assignment of an integral literal would
break when switching from C to C++ (for example, signed char and
unsigned char are different types, and at least one of them is
different from char---but both 0 and 6 would be acceptable rvalues in
an assignment to any char type).
    This is a feature of C++, I assure you.

    Since the problem first came up w.r.t. grx, a DJGPP-related
package, this is a reasonable place to check.  But for future
reference (or if you don't get a solution here), you'd probably be
better off in comp.lang.c++ for questions about intelligible error
messages (if you can access Usenet).  (The criterion is that never
having used grx, I can guess what broke---I guess that's a catch-22
:-)


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|                           Stephen Turnbull                            |
|     University of Tsukuba, Institute of Socio-Economic Planning       |
|          Tennodai 1-chome 1--1, Tsukuba, Ibaraki 305 JAPAN            |
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|                                                                       |
|                Founder and CEO, Skinny Boy Associates                 |
|               Mechanism Design and Social Engineering                 |
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