[vtk-developers] vtkStdString vs std::string

[Robert Maynard]

std::string for the majority of STL implementation is just a typedef of
std::basic_string<Type,Traits,Allocator> with Type = char.


On Wed, Feb 20, 2013 at 10:42 PM, David Thompson <david.thompson at kitware.com
> wrote:

> Hi JC,
>
> At least one reason vtkStdString exists is because old versions of SunCC
> could not compile std::map<std::string,std::string> as the template
> expansions resulted in class names exceeding a fixed string length in the
> compiler (strings were templated on character type in Sun's STL). That is
> no longer a concern and when we dropped support for old compilers a while
> back, std::string became allowed.
>
>         David
>
> On Feb 20, 2013, at 5:56 PM, Jean-Christophe Fillion-Robin <
> jchris.fillionr at kitware.com> wrote:
>
> > Hi Folks,
> >
> > What is the advantages of one vs the other? Looking at the current code
> base, seems both are widely used.
> >
> >
> > $ rm -rf Common/Core/vtkStdString.*
> > $ ack -c -l -h "std\:\:string" | cut -d":" -f2 | awk '{s+=$1} END {print
> s}'
> > 1583
> > $ ack -c -l -h "vtkStdString" | cut -d":" -f2 | awk '{s+=$1} END {print
> s}'
> > 2104
> >
> >
> > Are the following reason still valid:
> >     - allow forward declaration hence reducing the number of header
> inclusion, and also speed compilation.
> >     - shorter symbol name. See [1]
> >
> >
> > As a best practice, should we recommend one vs the other ?
> >
> > Thanks
> > Jc
> >
> > [1] http://www.vtk.org/pipermail/vtkusers/2010-January/105450.html
> >
> > --
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>
> David Thompson
> R&D Engineer – Kitware, Inc.
> david.thompson at kitware.com
> (919)869-8868
> Suite G-4
> 101 E. Weaver St.
> Carrboro, NC 27510
>
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-- 
Robert Maynard
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