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Re: Creating C++ constructor member init lists
From: |
Pascal J. Bourguignon |
Subject: |
Re: Creating C++ constructor member init lists |
Date: |
Tue, 27 Oct 2009 22:21:13 +0100 |
User-agent: |
Gnus/5.1008 (Gnus v5.10.8) Emacs/22.3 (darwin) |
Sarir Khamsi <sarir.khamsi@raytheon.com> writes:
> I'd like to write some code in some language (preferably in Emacs
> Lisp) to take a C++ class and add member variables to the
> constructor's member initialization list in an automated
> fashion. Given something like:
>
> struct MyType
> {
> MyType();
> // ...
> private:
> int i1_;
> double d_;
> T1 *pT1_;
> T2 t2_;
> };
>
> I'd like the code to generate:
>
> struct MyType
> {
> MyType() :
> i1_(0),
> d_(0.0),
> pT1_(0),
> t2_()
> {
> }
> // ...
> private:
> int i1_;
> double d_;
> T1 *pT1_;
> T2 t2_;
> };
>
> It would be easy to write something that just default-constructs the
> members, but I'd like to make it smart enough to init bools to
> "false", ints to "0", doubles to "0.0", etc. My questions are:
>
> - Are there helper functions in c++-mode that can be used to
> enumerate member variables, or make life easier?
Not in c++-mode. But you might find that with the cedet project.
> - Is there code to do something like this already (I looked a bit and
> didn't find exactly what I wanted)?
Possibly in cedet. At least, there there are the tools to do such a
thing, (eg. the bovinator is a parser generator to implement the
partial parsers needed for such kind of tools).
> - Is GCC-XML worth looking into? I've looked at the output of a small
> C++ class and could use Python to do what I want.
If you need something more precise. However, if you are working in
emacs, you may want to be able to work on code that is not perfect,
syntax-wise (code that you are editing), and therefore the tools
you'll find in the cedet project will probably be more adapted to what
you want to do than gcc-xml.
> I haven't started the coding and wanted to get other people's
> input. Thanks.
http://cedet.sourceforge.net
The C/C++ parser is already implemented (click on "Parts of CEDET" /
Semantic ) Also, if you want to generate your constructors, you can do
so with SRecode, which is a template based code generation tool. (But
I guess you will have to add your features to collect the attributes
of the class and put them in the constructor tranmission).
--
__Pascal Bourguignon__