| 1 | // Copyright (c) 2001-2011 Hartmut Kaiser |
| 2 | // Copyright (c) 2001-2011 Joel de Guzman |
| 3 | // |
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 6 | |
| 7 | #if !defined(BOOST_SPIRIT_LEXER_TYPE_APR_20_2009_0759PM) |
| 8 | #define BOOST_SPIRIT_LEXER_TYPE_APR_20_2009_0759PM |
| 9 | |
| 10 | #if defined(_MSC_VER) |
| 11 | #pragma once |
| 12 | #endif |
| 13 | |
| 14 | #include <boost/mpl/has_xxx.hpp> |
| 15 | #include <boost/spirit/home/lex/domain.hpp> |
| 16 | |
| 17 | namespace boost { namespace spirit { namespace lex |
| 18 | { |
| 19 | template <typename Derived> |
| 20 | struct lexer_type |
| 21 | { |
| 22 | struct lexer_id; |
| 23 | typedef Derived derived_type; |
| 24 | typedef lex::domain domain; |
| 25 | |
| 26 | // Requirement: l.collect(def, state, targetstate) -> void |
| 27 | // |
| 28 | // l: a lexer component |
| 29 | // def: token definition container |
| 30 | // state: lexer state this token definition needs to be added to |
| 31 | // targetstate: an optional lexer state the lexer should be switched |
| 32 | // into after matching this token |
| 33 | |
| 34 | Derived const& derived() const |
| 35 | { |
| 36 | return *static_cast<Derived const*>(this); |
| 37 | } |
| 38 | }; |
| 39 | |
| 40 | template <typename Derived> |
| 41 | struct primitive_lexer : lexer_type<Derived> |
| 42 | { |
| 43 | struct primitive_lexer_id; |
| 44 | }; |
| 45 | |
| 46 | template <typename Derived> |
| 47 | struct unary_lexer : lexer_type<Derived> |
| 48 | { |
| 49 | struct unary_lexer_id; |
| 50 | |
| 51 | // Requirement: l.subject -> subject lexer component |
| 52 | // |
| 53 | // l: a unary lexer component |
| 54 | |
| 55 | // Requirement: L::subject_type -> subject lexer component type |
| 56 | // |
| 57 | // L: a unary lexer component type |
| 58 | }; |
| 59 | |
| 60 | template <typename Derived> |
| 61 | struct nary_lexer : lexer_type<Derived> |
| 62 | { |
| 63 | struct nary_lexer_id; |
| 64 | |
| 65 | // Requirement: l.elements -> fusion sequence |
| 66 | // |
| 67 | // l: a composite lexer component |
| 68 | |
| 69 | // Requirement: L::elements_type -> fusion sequence |
| 70 | // |
| 71 | // L: a composite lexer component type |
| 72 | }; |
| 73 | |
| 74 | }}} |
| 75 | |
| 76 | namespace boost { namespace spirit { namespace traits // classification |
| 77 | { |
| 78 | namespace detail |
| 79 | { |
| 80 | BOOST_MPL_HAS_XXX_TRAIT_DEF(lexer_id) |
| 81 | BOOST_MPL_HAS_XXX_TRAIT_DEF(primitive_lexer_id) |
| 82 | BOOST_MPL_HAS_XXX_TRAIT_DEF(unary_lexer_id) |
| 83 | BOOST_MPL_HAS_XXX_TRAIT_DEF(nary_lexer_id) |
| 84 | } |
| 85 | |
| 86 | template <typename T> |
| 87 | struct is_lexer : detail::has_lexer_id<T> {}; |
| 88 | |
| 89 | template <typename T> |
| 90 | struct is_primitive_lexer : detail::has_primitive_lexer_id<T> {}; |
| 91 | |
| 92 | template <typename T> |
| 93 | struct is_unary_lexer : detail::has_unary_lexer_id<T> {}; |
| 94 | |
| 95 | template <typename T> |
| 96 | struct is_nary_lexer : detail::has_nary_lexer_id<T> {}; |
| 97 | |
| 98 | }}} |
| 99 | |
| 100 | #endif |
| 101 | |