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Performance improvements, minor bits fixed.

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[SVN r2446]
This commit is contained in:
Hartmut Kaiser
2005-01-18 15:44:51 +00:00
parent 840ae02999
commit e83d5ff8d7
13 changed files with 64 additions and 105 deletions
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37
tool/cpp.cpp
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@@ -275,21 +275,25 @@ boost::wave::util::file_position_type current_position;
istreambuf_iterator<char>());
#endif
// This sample uses the lex_iterator and lex_token types predefined with
// the Wave library, but it is possible to use your own types.
// This application uses the lex_iterator and lex_token types predefined
// with the Wave library, but it is possible to use your own types.
//
// You may want to have a look at the other samples to see how this is
// possible to achieve.
typedef boost::wave::cpplexer::lex_iterator<
boost::wave::cpplexer::lex_token<> >
lex_iterator_type;
// The C++ preprocessor iterators shouldn't be constructed directly. They
// are to be generated through a boost::wave::context<> object. This
// boost::wave::context object is additionally to be used to initialize and
// define different parameters of the actual preprocessing.
typedef boost::wave::context<
std::string::iterator, lex_iterator_type,
boost::wave::iteration_context_policies::load_file_to_string,
trace_macro_expansion>
context_type;
// The C++ preprocessor iterators shouldn't be constructed directly. They
// are to be generated through a boost::wave::context<> object. This
// boost::wave::context object is additionally to be used to initialize and
// define different parameters of the actual preprocessing.
// The preprocessing of the input stream is done on the fly behind the
// scenes during iteration over the context_type::iterator_type stream.
std::ofstream traceout;
@@ -316,7 +320,10 @@ boost::wave::util::file_position_type current_position;
traceout.clear(cerr.rdstate());
static_cast<std::basic_ios<char> &>(traceout).rdbuf(cerr.rdbuf());
}
// This this the central piece of the Wave library, it provides you with
// the iterators to get the preprocessed tokens and allows to configure
// the preprocessing stage in advance.
context_type ctx (instring.begin(), instring.end(), file_name.c_str(),
trace_macro_expansion(traceout, enable_trace));
@@ -442,7 +449,7 @@ boost::wave::util::file_position_type current_position;
// preprocess the required include files
if (vm.count("forceinclude")) {
// add the filenames to force as include files in _reverse_ order
// the second parameter 'is_last' for the force_include function should
// the second parameter 'is_last' of the force_include function should
// be set to true for the last (first given) file.
vector<string> const &force =
vm["forceinclude"].as<vector<string> >();
@@ -454,8 +461,9 @@ boost::wave::util::file_position_type current_position;
first.force_include(filename.c_str(), ++cit == rend);
}
}
// loop over all generated tokens outputing the generated text
// >>>>>>>>>>>>> Here the actual preprocessing happens. <<<<<<<<<<<<<<<<<<<
// loop over all generated tokens outputting the generated text
while (first != last) {
// print out the string representation of this token (skip comments)
using namespace boost::wave;
@@ -626,11 +634,10 @@ main (int argc, char *argv[])
inserter(arguments, arguments.end()), cmd_line_util::is_argument());
// if there is no input file given, then exit
if (0 == arguments.size() || 0 == arguments[0].value.size()) {
// cerr << "wave: no input file given, "
// << "use --help to get a hint." << endl;
// return 5;
// preprocess the given input file
if (0 == arguments.size() || 0 == arguments[0].value.size() ||
arguments[0].value[0] == "-")
{
// preprocess the given input from stdin
return do_actual_work("stdin", std::cin, vm);
}
else {