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libcarla/include/system/boost/wave/grammars/cpp_has_include_grammar.hpp
LiXiaoqi 220ecf68c6 init
2024-10-18 13:19:59 +08:00

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/*=============================================================================
Boost.Wave: A Standard compliant C++ preprocessor library
http://www.boost.org/
Copyright (c) 2020 Jeff Trull
Copyright (c) 2001-2012 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_CPP_HAS_INCLUDE_GRAMMAR_HPP_F48287B2_DC67_40A8_B4A1_800EFBD67869_INCLUDED)
#define BOOST_CPP_HAS_INCLUDE_GRAMMAR_HPP_F48287B2_DC67_40A8_B4A1_800EFBD67869_INCLUDED
#include <boost/wave/wave_config.hpp>
#include <boost/assert.hpp>
#include <boost/spirit/include/classic_core.hpp>
#include <boost/spirit/include/classic_closure.hpp>
#include <boost/spirit/include/classic_assign_actor.hpp>
#include <boost/spirit/include/classic_push_back_actor.hpp>
#include <boost/wave/token_ids.hpp>
#include <boost/wave/util/pattern_parser.hpp>
#include <boost/wave/grammars/cpp_has_include_grammar_gen.hpp>
#if !defined(spirit_append_actor)
#define spirit_append_actor(actor) boost::spirit::classic::push_back_a(actor)
#endif // !has_include(spirit_append_actor)
// this must occur after all of the includes and before any code appears
#ifdef BOOST_HAS_ABI_HEADERS
#include BOOST_ABI_PREFIX
#endif
///////////////////////////////////////////////////////////////////////////////
namespace boost {
namespace wave {
namespace grammars {
///////////////////////////////////////////////////////////////////////////////
// define, whether the rule's should generate some debug output
#define TRACE_CPP_HAS_INCLUDE_GRAMMAR \
bool(BOOST_SPIRIT_DEBUG_FLAGS_CPP & BOOST_SPIRIT_DEBUG_FLAGS_HAS_INCLUDE_GRAMMAR) \
/**/
template <typename ContainerT>
struct has_include_grammar :
public boost::spirit::classic::grammar<has_include_grammar<ContainerT> >
{
has_include_grammar(ContainerT &tokens_seq_,
bool &is_quoted_filename_,
bool &is_system_)
: tokens_seq(tokens_seq_), is_quoted_filename(is_quoted_filename_),
is_system(is_system_), true_(true)
{
BOOST_SPIRIT_DEBUG_TRACE_GRAMMAR_NAME(*this, "has_include_grammar",
TRACE_CPP_HAS_INCLUDE_GRAMMAR);
is_quoted_filename = false;
is_system = false;
}
template <typename ScannerT>
struct definition
{
typedef boost::spirit::classic::rule<ScannerT> rule_t;
rule_t has_include_op;
rule_t system_include;
rule_t nonsystem_include;
rule_t nonparen;
rule_t parenthesized_exp;
rule_t computed_include;
definition(has_include_grammar const & self)
{
using namespace boost::spirit::classic;
using namespace boost::wave;
using namespace boost::wave::util;
has_include_op
= ch_p(T_IDENTIFIER) >> // token contains '__has_include'
ch_p(T_LEFTPAREN) >>
(system_include | nonsystem_include | computed_include) >>
ch_p(T_RIGHTPAREN)
;
system_include
= ch_p(T_LESS)
[
spirit_append_actor(self.tokens_seq)
]
>> * (~ch_p(T_GREATER))
[
spirit_append_actor(self.tokens_seq)
]
>> ch_p(T_GREATER)
[
spirit_append_actor(self.tokens_seq)
][
assign_a(self.is_quoted_filename, self.true_)
][
assign_a(self.is_system, self.true_)
]
;
nonsystem_include = ch_p(T_STRINGLIT)
[
spirit_append_actor(self.tokens_seq)
][
assign_a(self.is_quoted_filename, self.true_)
]
;
// an action to store a sequence of parsed tokens
auto append_seq = [&](typename ScannerT::iterator_t first,
typename ScannerT::iterator_t last) {
for (;first != last;++first) {
self.tokens_seq.push_back(*first);
};
};
// if neither of the above match we take everything between
// the parentheses and evaluate it ("computed include")
// supported expressions are "implementation defined" per the gcc manual
// we've tried to be fairly generous in Wave
// here we accept any set of non-whitespace characters with
// properly nested parentheses:
nonparen = (anychar_p - ch_p(T_LEFTPAREN) - ch_p(T_RIGHTPAREN)) [ append_seq ] ;
parenthesized_exp =
ch_p(T_LEFTPAREN)[ spirit_append_actor(self.tokens_seq) ] >>
computed_include >>
ch_p(T_RIGHTPAREN)[ spirit_append_actor(self.tokens_seq) ] ;
computed_include = * (nonparen | parenthesized_exp) ;
BOOST_SPIRIT_DEBUG_TRACE_RULE(has_include_op, TRACE_CPP_HAS_INCLUDE_GRAMMAR);
BOOST_SPIRIT_DEBUG_TRACE_RULE(system_include, TRACE_CPP_HAS_INCLUDE_GRAMMAR);
BOOST_SPIRIT_DEBUG_TRACE_RULE(nonsystem_include, TRACE_CPP_HAS_INCLUDE_GRAMMAR);
BOOST_SPIRIT_DEBUG_TRACE_RULE(computed_include, TRACE_CPP_HAS_INCLUDE_GRAMMAR);
BOOST_SPIRIT_DEBUG_TRACE_RULE(parenthesized_exp, TRACE_CPP_HAS_INCLUDE_GRAMMAR);
BOOST_SPIRIT_DEBUG_TRACE_RULE(nonparen, TRACE_CPP_HAS_INCLUDE_GRAMMAR);
}
// start rule of this grammar
rule_t const& start() const
{ return has_include_op; }
};
ContainerT &tokens_seq;
bool &is_quoted_filename;
bool &is_system;
const bool true_; // Spirit Classic actors operate on references, not values
};
///////////////////////////////////////////////////////////////////////////////
#undef TRACE_CPP_HAS_INCLUDE_GRAMMAR
///////////////////////////////////////////////////////////////////////////////
//
// The following parse function is has_include here, to allow the separation of
// the compilation of the has_include_grammar from the function
// using it.
//
///////////////////////////////////////////////////////////////////////////////
#if BOOST_WAVE_SEPARATE_GRAMMAR_INSTANTIATION != 0
#define BOOST_WAVE_HAS_INCLUDE_GRAMMAR_GEN_INLINE
#else
#define BOOST_WAVE_HAS_INCLUDE_GRAMMAR_GEN_INLINE inline
#endif
// The parse_operator_define function is instantiated manually twice to
// simplify the explicit specialization of this template. This way the user
// has only to specify one template parameter (the lexer type) to correctly
// formulate the required explicit specialization.
// This results in no code overhead, because otherwise the function would be
// generated by the compiler twice anyway.
template <typename LexIteratorT>
BOOST_WAVE_HAS_INCLUDE_GRAMMAR_GEN_INLINE
boost::spirit::classic::parse_info<
typename has_include_grammar_gen<LexIteratorT>::iterator1_type
>
has_include_grammar_gen<LexIteratorT>::parse_operator_has_include (
iterator1_type const &first, iterator1_type const &last,
token_sequence_type &tokens,
bool &is_quoted_filename, bool &is_system)
{
using namespace boost::spirit::classic;
using namespace boost::wave;
has_include_grammar<token_sequence_type>
g(tokens, is_quoted_filename, is_system);
return boost::spirit::classic::parse (
first, last, g, ch_p(T_SPACE) | ch_p(T_CCOMMENT));
}
template <typename LexIteratorT>
BOOST_WAVE_HAS_INCLUDE_GRAMMAR_GEN_INLINE
boost::spirit::classic::parse_info<
typename has_include_grammar_gen<LexIteratorT>::iterator2_type
>
has_include_grammar_gen<LexIteratorT>::parse_operator_has_include (
iterator2_type const &first, iterator2_type const &last,
token_sequence_type &found_qualified_name,
bool &is_quoted_filename, bool &is_system)
{
using namespace boost::spirit::classic;
using namespace boost::wave;
has_include_grammar<token_sequence_type>
g(found_qualified_name, is_quoted_filename, is_system);
return boost::spirit::classic::parse (
first, last, g, ch_p(T_SPACE) | ch_p(T_CCOMMENT));
}
#undef BOOST_WAVE_HAS_INCLUDE_GRAMMAR_GEN_INLINE
///////////////////////////////////////////////////////////////////////////////
} // namespace grammars
} // namespace wave
} // namespace boost
// the suffix header occurs after all of the code
#ifdef BOOST_HAS_ABI_HEADERS
#include BOOST_ABI_SUFFIX
#endif
#endif // !defined(BOOST_CPP_HAS_INCLUDE_GRAMMAR_HPP_F48287B2_DC67_40A8_B4A1_800EFBD67869_INCLUDED)
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