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proof-of-concept boost::wave iteration policy

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This commit is contained in:
greye 2014-05-21 23:50:58 +04:00
parent 8b94e31062
commit 3721174ae4
1 changed files with 45 additions and 1 deletions
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46
extern/shiny/Main/Preprocessor.cpp vendored
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@ -4,6 +4,50 @@
#include <boost/wave/cpplexer/cpp_lex_token.hpp>
#include <boost/wave/cpplexer/cpp_lex_iterator.hpp>
#include <boost/filesystem/fstream.hpp>
namespace boost {
namespace wave {
namespace iteration_context_policies {
struct load_utf8_path_to_string
{
template <typename IterContextT>
class inner
{
public:
template <typename PositionT>
static void init_iterators(IterContextT &iter_ctx,
PositionT const &act_pos, language_support language)
{
typedef typename IterContextT::iterator_type iterator_type;
namespace bfs = boost::filesystem;
// read in the file
bfs::ifstream instream(bfs::path(iter_ctx.filename.c_str()));
if (!instream.is_open()) {
BOOST_WAVE_THROW_CTX(iter_ctx.ctx, preprocess_exception,
bad_include_file, iter_ctx.filename.c_str(), act_pos);
return;
}
instream.unsetf(std::ios::skipws);
iter_ctx.instring.assign(
std::istreambuf_iterator<char>(instream.rdbuf()),
std::istreambuf_iterator<char>());
iter_ctx.first = iterator_type(
iter_ctx.instring.begin(), iter_ctx.instring.end(),
PositionT(iter_ctx.filename), language);
iter_ctx.last = iterator_type();
}
private:
std::string instring;
};
};
} } }
namespace sh
{
std::string Preprocessor::preprocess (std::string source, const std::string& includePath, std::vector<std::string> definitions, const std::string& name)
@ -29,7 +73,7 @@ namespace sh
// match the iterator type used during construction of the context
// instance (see below). It is the type of the underlying input stream.
typedef boost::wave::context<std::string::iterator, lex_iterator_type
, boost::wave::iteration_context_policies::load_file_to_string,
, boost::wave::iteration_context_policies::load_utf8_path_to_string,
emit_custom_line_directives_hooks>
context_type;