Re: [boost] Metrowerks 6.0 regression compile results

From: Darin Adler (darin_at_[hidden])
Date: 2000-10-12 20:05:30

on 10/12/00 2:20 PM, Beman Dawes at beman_at_[hidden] wrote:

> ***** random/random_test.cpp *****
> Metrowerks CodeWarrior
> mwcc -maxerrors 10 -cwd source -I- -Ic:/boost/site
> c:/boost/site/libs/random/random_test.cpp
> ### mwcc Compiler:
> #      In: ..\site\boost\random.hpp
> #    From: ..\site\libs\random\random_test.cpp
> # --------------------------------------------
> #     147:        return (a*x+c) % m;
> # Warning:                          ^
> #   division by 0
> #    (instantiating: 'boost::random::const_mod<unsigned long,
> #   0>::mult_add(unsigned long, unsigned long, unsigned long)')

Perhaps a mistake in the compiler, but can probably be worked around with
partial specialization.

> ### mwcc Compiler:
> #    File: ..\site\libs\random\random_test.cpp
> # --------------------------------------------
> #     177:    rand48 rnd(5);
> #   Error:                 ^
> #   ambiguous access to overloaded function
> #   'boost::rand48::rand48(unsigned long long)'
> #   'boost::rand48::rand48(long)'

Changing the constant to 5L should fix this.

> ### mwcc Compiler:
> #     179:    rnd.seed(17);
> #   Error:               ^
> #   ambiguous access to overloaded function
> #   'boost::rand48::seed(unsigned long long)'
> #   'boost::rand48::seed(long)'

Changing the constant to 17L should fix this.

> ***** utility/compressed_pair_test.cpp *****
> Metrowerks CodeWarrior
> mwcc -maxerrors 10 -cwd source -I- -Ic:/boost/site
> c:/boost/site/libs/utility/compressed_pair_test.cpp
> ### mwcc Compiler:
> #    File: ..\site\libs\utility\compressed_pair_test.cpp
> # ------------------------------------------------------
> #     134:  template double& compressed_pair<double, int&>::first();
> #   Error:                                                         ^
> #   illegal explicit template instantiation
> ### mwcc Compiler:
> #     135:  template int& compressed_pair<double, int&>::second();
> #   Error:                                                       ^
> #   illegal explicit template instantiation
> ### mwcc Compiler:
> #     136:  template compressed_pair<double, int&>::compressed_pair(int&);
> #   Error:                                          ^^^^^^^^^^^^^^^
> #   declaration syntax error
> ### mwcc Compiler:
> #     137:  template compressed_pair<double,
> int&>::compressed_pair(call_traits<double>::param_type,int&);
> #   Error:                                          ^^^^^^^^^^^^^^^
> #   declaration syntax error

You can explicitly instantiate a template class, or a template member
function, but not a non-template member function of a template class (see
section 14.7.2 of the standard). The correct code here would be:

    template class Metrowerks::compressed_pair<double, int&>;

These attempts to instantiate individual member functions may work in some
compilers, but they are non-standard.

    -- Darin