🚀 go-pugleaf

Christopher Pilsworth wrote:
> 
> Hi there,
> 
> I am looking for someone who can help me with some STL stuff.
> I have checked out a lot of the web/ftp sites for relevant code but have
> so far been unable to find any.
> 
> I bought a book the other day that showed how to use input and output
> iterators to write containers (the example was a vector) to disk.  It
> looked extremely simple.  However the compiler didn't like it.
> 
> The method seems to work with a standard ostream or istream (cin/cout)
> but did not work when given a ifstream or ofstream as in the book.
> 
> I need this code urgently as it seems the best way to manage indexes to
> my data files and the deadline is in two weeks time.
> 
> The code in the book looked kind of like this:
> 
> ifstream myin ("infile");
> ofstream myout("outfile);
> 
> istream_iterator<char> input_iter(myin), eos;
> ostream_iterator<char> output_iter(myout);
> 
> vector<char> myvector ...etc. etc.
> ...
> (This is probably wrong but is there just to give the jist)
> 
> The problem was on the third line of code. The error message was "illegal
> template arguments".  I have checked over and over that the text was
> identical to that of the book, but still no joy!
> 
> Does the STL supplied with the Metrowerks Codewarrior 8 not like fstreams
> as arguments to this template.
> 
> I'm sorry that I can not supply my code as I am in university and the
> code is at home.  Any hints on making containers persistent (any way)
> would be very gratefully recieved.
> 
> thankyou in advance
> 
> regards
> 
> Christopher Pilsworth
> HCM94CP@dmu.ac.uk
> PS: Please could replies be CC'd to the above e-mail address as I
> sometimes have problems with my news reader. Thanks



Chris,

The MW compiler does not yet support default template arguments.

You need to code something like this:

istream_iterator<InputRecord, ptrdiff_t> inputFile_itor(inputFile);

where ptrdiff_t is a type. MW already knows about ptrdiff_t so just code 
it as is.  The argument to the constructor is of course the stream you 
are iterating on.

Hope this helps.

Dave Riedel
Silk City Software Inc.

David Riedel wrote:

[...]

> Chris,
> 
> The MW compiler does not yet support default template arguments.

As an aside. Do you (or anybody else) know if a compiler
compatible with AT&T 3.0 does support default template
arguments?

Also does that compiler support RTTI?

[...]

> Dave Riedel
> Silk City Software Inc.

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Paul K Egell-Johnsen,

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