On Fri, Dec 25, 2015 at 2:07 PM Masakatsu ITO(伊藤) <itoh.masaka...@jaxa.jp> wrote:
> > Actually I tried to adapt my DiffereneceOperator type to Proto > as Proto Users Guide explains in "Adapting Existing Types to Proto". > > > http://www.boost.org/doc/libs/1_57_0/doc/html/proto/users_guide.html#boost_proto.users_guide.front_end.define_operators > > I think this didn't work because the macro doesn't overload the function call operator. > And I wondered when it is necessary to write a code such like > > calculator< proto::terminal< placeholder<0> >::type > const _1; > > > in "The extends< > Expression Wrapper". > > > http://www.boost.org/doc/libs/1_57_0/doc/html/proto/users_guide.html#boost_proto.users_guide.front_end.customizing_expressions_in_your_domain.extends > > <http://www.boost.org/doc/libs/1_57_0/doc/html/proto/users_guide.html#boost_proto.users_guide.front_end.customizing_expressions_in_your_domain.extends> > This is needed to make sure the terminal is part of the calculator domain, if you leave out the calculator<> part you just get an expression in the default domain. > Wishing you a merry Christmas, > Masa > > Merry Christmas to you too! Bart
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