Re: confusion about string.erase( --string.end() )

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On Tue, 22 Nov 2011, Pawel Sikora wrote:

Hi,

afaics the gcc-4.6 accepts following code:

#include <string>
int main()
{
       std::string line( "blabla" );
       line.erase( --line.end() );
}

but other compilers reject such code:

msvc8  : error C2105: '--' needs l-value
comeau : error: expression must be a modifiable lvalue

is it a bug in g++?

Hello,

your code is wrong. Libraries that use pointers as iterators will fail. Libraries that use classes are likely to work. There is nothing wrong with the fact that libstdc++ accepts this code.

When references on member functions are implemented, it would be possible to reject this code, but I am not sure we want to.

--
Marc Glisse


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