On 04/04/2007 02:18 AM, Eric Niebler wrote:
As discussed here recently, Boost.Proto is an expression template (ET) framework for building domain-specific embedded languages (DSEL). The purpose of this preliminary submission is to solicit feedback prior to a full submission (and to buy myself a little time to polish the docs/tests/examples :-). [snip]
<< Documentation (such as it is) >>
http://boost-sandbox.sourceforge.net/libs/proto/doc/html/index.html
On page: http://boost-sandbox.sourceforge.net/libs/proto/doc/html/boost_proto/user_s_... the sentence: Notice that in order to build a Proto expression template, at least one argument in the expression must be a Proto-ified. In this case, that is done with the terminal<> class template, which is used to wrap std::cout. was, at first, unclear to me because evaluate just had one argument; however, "one argument in expression" suggests there could be more than one. The following would be clearer to me: Notice that in order to build a Proto expression template, at least one subexpression of the whole expression must be a Proto-ified. In the case of: cout_ << "hello" << ',' << " world" this one Proto-ified subexpression is cout_, which is the Proto-ification of std::cout via wrapping by the terminal<> class template. I hope that's right. If not, then I still don't know what the sentence means :( [snip]