Re: [ublas] Compilation error: error: expected nested-name-specifier before ‘VEC_T’

Subject: Re: [ublas] Compilation error: error: expected nested-name-specifier before ‘VEC_T’
From: Rutger ter Borg (rutger_at_[hidden])
Date: 2009-12-11 10:44:23

Parker Jones wrote:
> 
> Hello all,
> 
> I am compiling someone else's C++ application that uses UBLAS and am
> getting a compilation error:
> 
> $ g++ distance.h
> distance.h:16: error: expected nested-name-specifier before ‘VEC_T’
> distance.h:16: error: expected ‘;’ before ‘vector_type’
> distance.h:33: error: expected nested-name-specifier before ‘VEC_T’
> distance.h:33: error: expected ‘;’ before ‘vector_type’
> 
> Platform: Ubuntu 9.10, g++4.4, Boost 1.38.
> I haven't touched C++ in over 10 years, so apologies if this is a trivial
> question.
> 
> Many thanks for any suggestions,
> Parker
> 

The compiler is complaining that a "typename" keyword is used, whereas there 
is no nested type defined. For example,

template< typename Vector >
struct something {
  typedef Vector vector_type;
  typedef typename vector::value_type value_type;
};

I.e., try removing the typename keyword from lines 16 and 33.

Cheers,

Rutger