Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!samsung!uunet!taumet!steve
From: steve@taumet.com (Stephen Clamage)
Newsgroups: comp.lang.c++
Subject: Re: Problems with typedef variable init'ing in c++
Message-ID: <783@taumet.com>
Date: 26 Jun 91 17:16:21 GMT
References: <2406@sun1.cs.nps.navy.mil>
Distribution: comp
Organization: Taumetric Corporation, San Diego
Lines: 34

lombardo@sun1.cs.nps.navy.mil (charles lombardo) writes:
|The problem is when I compile the same program slightly changed for the C++
|compiler.  Namely: [crunched]

|<>  typedef float Matrix[4][4];
|<>  extern void unit(Matrix);
|<>  main()
|<>  {
|<>       Matrix m;
|<>       unit(m);				// line 7
|<>  }    
|<>  void unit(Matrix m)
|<>  {
|<>    static Matrix un = {1.0, 0.0, 0.0, 0.0,	// line 15
|<>  		           0.0, 1.0, 0.0, 0.0,
|<>  		           0.0, 0.0, 1.0, 0.0,
|<>  		           0.0, 0.0, 0.0, 1.0 };
|<>    ...
|<>  }
|When I compile the above I get the following message:
|<>  "tmp2.c", line 7: warning:  m used but not set
|<>  "tmp2.c", line 15: error: bad initializer type for un: double 
|<>            					 ( float (*)[4] expected)
|<>  "tmp2.c", line 15: error:  initializer list too long

The first warning is because Cfront sees an uninitialized array passed
(as a pointer) to a routine, and is trying to be helpful.

The error messages are due to a bug in Cfront; your code is ok, although
I would suggest using fully-bracketed initialization for clarity and
ease of maintenance.
-- 

Steve Clamage, TauMetric Corp, steve@taumet.com