Flex Bison C++ Example: src/driver.cc Source File

00001 // $Id: driver.cc 39 2008-08-03 10:07:15Z tb $
00004 #include <fstream>
00005 #include <sstream>
00006 
00007 #include "driver.h"
00008 #include "scanner.h"
00009 
00010 namespace example {
00011 
00012 Driver::Driver(class CalcContext& _calc)
00013     : trace_scanning(false),
00014       trace_parsing(false),
00015       calc(_calc)
00016 {
00017 }
00018 
00019 bool Driver::parse_stream(std::istream& in, const std::string& sname)
00020 {
00021     streamname = sname;
00022 
00023     Scanner scanner(&in);
00024     scanner.set_debug(trace_scanning);
00025     this->lexer = &scanner;
00026 
00027     Parser parser(*this);
00028     parser.set_debug_level(trace_parsing);
00029     return (parser.parse() == 0);
00030 }
00031 
00032 bool Driver::parse_file(const std::string &filename)
00033 {
00034     std::ifstream in(filename.c_str());
00035     if (!in.good()) return false;
00036     return parse_stream(in, filename);
00037 }
00038 
00039 bool Driver::parse_string(const std::string &input, const std::string& sname)
00040 {
00041     std::istringstream iss(input);
00042     return parse_stream(iss, sname);
00043 }
00044 
00045 void Driver::error(const class location& l,
00046                    const std::string& m)
00047 {
00048     std::cerr << l << ": " << m << std::endl;
00049 }
00050 
00051 void Driver::error(const std::string& m)
00052 {
00053     std::cerr << m << std::endl;
00054 }
00055 
00056 } // namespace example