Problems with template instantiation in C++ Post: 302343101

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Top Forums Programming Problems with template instantiation in C++ Post 302343101 by MartinM09 on Tuesday 11th of August 2009 03:01:05 PM

08-11-2009

Registered User

I thank you for your help.

Quote:

The first several lines about the "export" keyword should be pretty clear: "export", used to enable a separation of declaration and definition of template classes/functions, is not supported by GCC.
A common work around to avoid this deprecated keyword and still stay on top of things is to do sort of a reverse include: Provide prototypes (with normal header extension) and definitions (usually with an "impl" ext.) in distinct files as usual but include the implementation file at the end of the header file. This is necessary as template instantiation requires presence of definition so it can instantiate the template "in one go".

I know, that g++ doesn't support the export keyword. But as time goes, this fact can be changed, or this keyword will be abolished. Therefore the I included this feature.
I have shorten the code to publish it on this forum. In the real world this file is scattered over several files. The core module of this project is about 20000 lines. Every additional module can be rough about 100 000 lines or the multiple size. Therefore I concluded to separate the compile units.

Quote:

Another error I spotted at a quick glance is linked with the very last function. Am I right in assuming it should be a total specialization of the function above? Then it should read "template <>". Of course, also here the function's definition is missing.

I have included the "<>" glyphes into the code. The result is, that the compile errors go away. But I have looked into the object file with the nm tool and I couldn't seen any instantiate function. That is not really what I intended.

MartinM09.

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pydoc

PYDOC(1)						    BSD General Commands Manual 						  PYDOC(1)

NAME

     pydoc -- the Python documentation tool

SYNOPSIS

     pydoc name
     pydoc -k keyword
     pydoc -p port
     pydoc -g
     pydoc -w module ...
     pydoc --help

DESCRIPTION

     pydoc shows text documentation on something related to python(1).	The name argument may be the name of a Python keyword, topic, function,
     module, or package, or a dotted reference to a class or function within a module or module in a package.  If name contains a '/', it is used
     as the path to a Python source file to document.  If name is 'keywords', 'topics', or 'modules', a listing of these things is displayed.

OPTIONS

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     -p port	    Start an HTTP server on the given port on the local machine.

     -g 	    Pop up a graphical interface for finding and serving documentation.

     -w module ...  Write out the HTML documentation for a module to a file in the current directory.  If module contains a '/', it is treated as
		    a filename; if it names a directory, documentation is written for all the contents.

     --help	    Prints out a help message.

AUTHOR

     Moshe Zadka, based on "pydoc --help"

SEE ALSO

     python(1)

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