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/*=============================================================================
Boost.Wave: A Standard compliant C++ preprocessor library
http://www.boost.org/
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(INTERPRET_PRAGMA_HPP_B1F2315E_C5CE_4ED1_A343_0EF548B7942A_INCLUDED)
#define INTERPRET_PRAGMA_HPP_B1F2315E_C5CE_4ED1_A343_0EF548B7942A_INCLUDED
#include <string>
#include <list>
#include <boost/spirit/include/classic_core.hpp>
#include <boost/spirit/include/classic_assign_actor.hpp>
#include <boost/spirit/include/classic_push_back_actor.hpp>
#include <boost/spirit/include/classic_confix.hpp>
#include <boost/wave/wave_config.hpp>
#include <boost/wave/util/pattern_parser.hpp>
#include <boost/wave/util/macro_helpers.hpp>
#include <boost/wave/token_ids.hpp>
#include <boost/wave/cpp_exceptions.hpp>
#include <boost/wave/cpp_iteration_context.hpp>
#include <boost/wave/language_support.hpp>
#if !defined(spirit_append_actor)
#define spirit_append_actor(actor) boost::spirit::classic::push_back_a(actor)
#define spirit_assign_actor(actor) boost::spirit::classic::assign_a(actor)
#endif // !defined(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 util {
///////////////////////////////////////////////////////////////////////////////
//
// The function interpret_pragma interprets the given token sequence as the
// body of a #pragma directive (or parameter to the _Pragma operator) and
// executes the actions associated with recognized Wave specific options.
//
///////////////////////////////////////////////////////////////////////////////
template <typename ContextT, typename IteratorT, typename ContainerT>
inline bool
interpret_pragma(ContextT &ctx, typename ContextT::token_type const &act_token,
IteratorT it, IteratorT const &end, ContainerT &pending)
{
typedef typename ContextT::token_type token_type;
typedef typename token_type::string_type string_type;
using namespace cpplexer;
if (T_IDENTIFIER == token_id(*it)) {
// check for pragma wave ...
if ((*it).get_value() == BOOST_WAVE_PRAGMA_KEYWORD)
{
// this is a wave specific option, it should have the form:
//
// #pragma command option(value)
//
// where
// 'command' is the value of the preprocessor constant
// BOOST_WAVE_PRAGMA_KEYWORD (defaults to "wave") and
// '(value)' is required only for some pragma directives (this is
// optional)
//
// All recognized #pragma operators are forwarded to the supplied
// preprocessing hook.
using namespace boost::spirit::classic;
token_type option;
ContainerT values;
if (!parse (++it, end,
( ch_p(T_IDENTIFIER)
[
spirit_assign_actor(option)
]
| pattern_p(KeywordTokenType,
TokenTypeMask|PPTokenFlag)
[
spirit_assign_actor(option)
]
| pattern_p(OperatorTokenType|AltExtTokenType,
ExtTokenTypeMask|PPTokenFlag) // and, bit_and etc.
[
spirit_assign_actor(option)
]
| pattern_p(BoolLiteralTokenType,
TokenTypeMask|PPTokenFlag)
[
spirit_assign_actor(option)
]
)
>> !comment_nest_p(
ch_p(T_LEFTPAREN),
ch_p(T_RIGHTPAREN)
)[spirit_assign_actor(values)],
pattern_p(WhiteSpaceTokenType, TokenTypeMask|PPTokenFlag)).hit)
{
typename ContextT::string_type msg(
impl::as_string<string_type>(it, end));
BOOST_WAVE_THROW_CTX(ctx, preprocess_exception,
ill_formed_pragma_option,
msg.c_str(), act_token.get_position());
return false;
}
// remove the falsely matched surrounding parenthesis's
if (values.size() >= 2) {
BOOST_ASSERT(T_LEFTPAREN == values.front() && T_RIGHTPAREN == values.back());
values.erase(values.begin());
typename ContainerT::reverse_iterator rit = values.rbegin();
values.erase((++rit).base());
}
// decode the option (call the context_policy hook)
if (!ctx.get_hooks().interpret_pragma(
ctx.derived(), pending, option, values, act_token))
{
// unknown #pragma option
string_type option_str ((*it).get_value());
option_str += option.get_value();
if (values.size() > 0) {
option_str += "(";
option_str += impl::as_string(values);
option_str += ")";
}
BOOST_WAVE_THROW_CTX(ctx, preprocess_exception,
ill_formed_pragma_option,
option_str.c_str(), act_token.get_position());
return false;
}
return true;
}
#if BOOST_WAVE_SUPPORT_PRAGMA_ONCE != 0
else if ((*it).get_value() == "once") {
// #pragma once
return ctx.add_pragma_once_header(act_token, ctx.get_current_filename());
}
#endif
#if BOOST_WAVE_SUPPORT_PRAGMA_MESSAGE != 0
else if ((*it).get_value() == "message") {
// #pragma message(...) or #pragma message ...
using namespace boost::spirit::classic;
ContainerT values;
if (!parse (++it, end,
( ( ch_p(T_LEFTPAREN)
>> lexeme_d[
*(anychar_p[spirit_append_actor(values)] - ch_p(T_RIGHTPAREN))
]
>> ch_p(T_RIGHTPAREN)
)
| lexeme_d[
*(anychar_p[spirit_append_actor(values)] - ch_p(T_NEWLINE))
]
),
pattern_p(WhiteSpaceTokenType, TokenTypeMask|PPTokenFlag)
).hit
)
{
typename ContextT::string_type msg(
impl::as_string<string_type>(it, end));
BOOST_WAVE_THROW_CTX(ctx, preprocess_exception,
ill_formed_pragma_message,
msg.c_str(), act_token.get_position());
return false;
}
// remove the falsely matched closing parenthesis/newline
if (values.size() > 0) {
BOOST_ASSERT(T_RIGHTPAREN == values.back() || T_NEWLINE == values.back());
typename ContainerT::reverse_iterator rit = values.rbegin();
values.erase((++rit).base());
}
// output the message itself
typename ContextT::string_type msg(impl::as_string(values));
BOOST_WAVE_THROW_CTX(ctx, preprocess_exception,
pragma_message_directive,
msg.c_str(), act_token.get_position());
return false;
}
#endif
}
return false;
}
///////////////////////////////////////////////////////////////////////////////
} // namespace util
} // 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(INTERPRET_PRAGMA_HPP_B1F2315E_C5CE_4ED1_A343_0EF548B7942A_INCLUDED)
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