| // Copyright (c) 2001-2009 Hartmut Kaiser |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| |
| #if !defined(BOOST_SPIRIT_KARMA_ALIGNMENT_META_GRAMMAR_FEB_21_2007_0826PM) |
| #define BOOST_SPIRIT_KARMA_ALIGNMENT_META_GRAMMAR_FEB_21_2007_0826PM |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| #pragma once // MS compatible compilers support #pragma once |
| #endif |
| |
| #include <boost/spirit/home/support/modifier.hpp> |
| #include <boost/spirit/home/support/meta_grammar.hpp> |
| #include <boost/spirit/home/karma/domain.hpp> |
| #include <boost/utility/enable_if.hpp> |
| #include <boost/mpl/if.hpp> |
| #include <boost/mpl/or.hpp> |
| |
| namespace boost { namespace spirit { namespace karma |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // forwards |
| /////////////////////////////////////////////////////////////////////////// |
| struct main_meta_grammar; |
| |
| struct simple_left_aligment; |
| struct simple_right_aligment; |
| struct simple_center_aligment; |
| |
| struct width_left_aligment; |
| struct width_right_aligment; |
| struct width_center_aligment; |
| |
| struct padding_left_aligment; |
| struct padding_right_aligment; |
| struct padding_center_aligment; |
| |
| struct full_left_aligment; |
| struct full_right_aligment; |
| struct full_center_aligment; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename Expr, typename Enable> |
| struct is_valid_expr; |
| |
| template <typename Expr, typename Enable> |
| struct expr_transform; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // left, right and center directive meta-grammars |
| /////////////////////////////////////////////////////////////////////////// |
| struct simple_align_directive_meta_grammar |
| : proto::or_< |
| meta_grammar::binary_rule< |
| karma::domain, proto::tag::subscript, simple_left_aligment, |
| proto::terminal<tag::left_align>, main_meta_grammar |
| >, |
| meta_grammar::binary_rule< |
| karma::domain, proto::tag::subscript, simple_right_aligment, |
| proto::terminal<tag::right_align>, main_meta_grammar |
| >, |
| meta_grammar::binary_rule< |
| karma::domain, proto::tag::subscript, simple_center_aligment, |
| proto::terminal<tag::center>, main_meta_grammar |
| > |
| > |
| {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // matches alignment directives defining the width only: |
| // left_align(width)[...], right_align(width)[...], center(width)[...] |
| /////////////////////////////////////////////////////////////////////////// |
| struct width_align_directive_meta_grammar |
| : proto::or_< |
| meta_grammar::subscript_function1_rule< |
| karma::domain, tag::left_align, width_left_aligment, |
| proto::terminal<int>, main_meta_grammar |
| >, |
| meta_grammar::subscript_function1_rule< |
| karma::domain, tag::right_align, width_right_aligment, |
| proto::terminal<int>, main_meta_grammar |
| >, |
| meta_grammar::subscript_function1_rule< |
| karma::domain, tag::center, width_center_aligment, |
| proto::terminal<int>, main_meta_grammar |
| > |
| > |
| {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // matches alignment directives defining the padding generator only: |
| // left_align(padding)[...], right_align(padding)[...], center(padding)[...] |
| /////////////////////////////////////////////////////////////////////////// |
| struct padding_align_directive_meta_grammar |
| : proto::or_< |
| meta_grammar::subscript_function1_rule< |
| karma::domain, tag::left_align, padding_left_aligment, |
| main_meta_grammar, main_meta_grammar |
| >, |
| meta_grammar::subscript_function1_rule< |
| karma::domain, tag::right_align, padding_right_aligment, |
| main_meta_grammar, main_meta_grammar |
| >, |
| meta_grammar::subscript_function1_rule< |
| karma::domain, tag::center, padding_center_aligment, |
| main_meta_grammar, main_meta_grammar |
| > |
| > |
| {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // matches full alignment directives: left_align(width, padding)[...], |
| // right_align(width, padding)[...], center(width, padding)[...] |
| /////////////////////////////////////////////////////////////////////////// |
| struct full_align_directive_meta_grammar |
| : proto::or_< |
| meta_grammar::subscript_function2_rule< |
| karma::domain, tag::left_align, full_left_aligment, |
| proto::terminal<int>, main_meta_grammar, main_meta_grammar |
| >, |
| meta_grammar::subscript_function2_rule< |
| karma::domain, tag::right_align, full_right_aligment, |
| proto::terminal<int>, main_meta_grammar, main_meta_grammar |
| >, |
| meta_grammar::subscript_function2_rule< |
| karma::domain, tag::center, full_center_aligment, |
| proto::terminal<int>, main_meta_grammar, main_meta_grammar |
| > |
| > |
| {}; |
| |
| // main alignment_directive_meta_grammar |
| struct alignment_directive_meta_grammar |
| : proto::or_< |
| simple_align_directive_meta_grammar, |
| width_align_directive_meta_grammar, |
| padding_align_directive_meta_grammar, |
| full_align_directive_meta_grammar |
| > |
| {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // These specializations non-intrusively hooks into the Karma meta-grammar. |
| // (see karma/meta_grammar.hpp) |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename Expr> |
| struct is_valid_expr< |
| Expr, |
| typename enable_if< |
| proto::matches<Expr, alignment_directive_meta_grammar> |
| >::type |
| > |
| : mpl::true_ |
| { |
| }; |
| |
| template <typename Expr> |
| struct expr_transform< |
| Expr, |
| typename enable_if< |
| proto::matches<Expr, alignment_directive_meta_grammar> |
| >::type |
| > |
| : mpl::identity<alignment_directive_meta_grammar> |
| { |
| }; |
| |
| }}} |
| |
| #endif |
