Main.C

   1 // $Id: exprtest.cc 18 2007-08-19 19:51:52Z tb $
   2
   3 #include <iostream>
   4 #include <fstream>
   5
   6 #include "ObCompiler.H"
   7 #include "expression.h"
   8
   9 int main(int argc, char *argv[])
  10 {
  11     CalcContext calc;
  12     objectbuilder::ObCompiler obCompiler(calc);
  13     bool readfile = false;
  14
  15     for(int ai = 1; ai < argc; ++ai)
  16     {
  17         if (argv[ai] == std::string ("-p")) {
  18             obCompiler.trace_parsing = true;
  19         }
  20         else if (argv[ai] == std::string ("-s")) {
  21             obCompiler.trace_scanning = true;
  22         }
  23         else
  24         {
  25             // read a file with expressions
  26
  27             std::fstream infile(argv[ai]);
  28             if (!infile.good())
  29             {
  30                 std::cerr << "Could not open file: " << argv[ai] << std::endl;
  31                 return 0;
  32             }
  33
  34             calc.clearExpressions();
  35             bool result = obCompiler.parse_stream(infile, argv[ai]);
  36             if (result)
  37             {
  38                 std::cout << "Expressions:" << std::endl;
  39                 for (unsigned int ei = 0; ei < calc.expressions.size(); ++ei)
  40                 {
  41                     std::cout << "[" << ei << "]:" << std::endl;
  42                     std::cout << "tree:" << std::endl;
  43                     calc.expressions[ei]->print(std::cout);
  44                     std::cout << "evaluated: "
  45                               << calc.expressions[ei]->evaluate()
  46                               << std::endl;
  47                 }
  48             }
  49
  50             readfile = true;
  51         }
  52     }
  53
  54     if (readfile) return 0;
  55
  56     std::cout << "Reading expressions from stdin" << std::endl;
  57
  58     std::string line;
  59     while( std::cout << "input: " &&
  60            std::getline(std::cin, line) &&
  61            !line.empty() )
  62     {
  63         calc.clearExpressions();
  64         bool result = obCompiler.parse_string(line, "input");
  65
  66         if (result)
  67         {
  68             for (unsigned int ei = 0; ei < calc.expressions.size(); ++ei)
  69             {
  70                 std::cout << "tree:" << std::endl;
  71                 calc.expressions[ei]->print(std::cout);
  72                 std::cout << "evaluated: "
  73                           << calc.expressions[ei]->evaluate()
  74                           << std::endl;
  75             }
  76         }
  77     }
  78 }