exprtk_testgen.cpp File Reference

#include <cstdio>
#include <fstream>
#include <string>
#include "exprtk.hpp"

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Functions
template<typename Allocator , template< typename, typename > class Sequence>
std::size_t	load_expressions (const std::string &file_name, Sequence< std::string, Allocator > &sequence)
template<typename T >
bool	test_gen (const std::string &expr_file)
int	main (int argc, char *argv[])

Function Documentation

load_expressions()

template<typename Allocator , template< typename, typename > class Sequence>

std::size_t load_expressions ( const std::string &  file_name, Sequence< std::string, Allocator > &  sequence  )

inline

Definition at line 43 of file exprtk_testgen.cpp.

{
   std::ifstream stream(file_name.c_str());
   if (!stream) return 0;
   std::string buffer;
   buffer.reserve(1024);
   std::size_t line_count = 0;
   while (std::getline(stream,buffer))
   {
      if (buffer.empty())
         continue;
      else if ('#' == buffer[0])
         continue;
      ++line_count;
      sequence.push_back(buffer);
   }
 
   return line_count;
}

Referenced by test_gen().

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main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 154 of file exprtk_testgen.cpp.

{
   if (argc != 2)
   {
      printf("usage: exprtk_testgen <file name>\n");
      return 1;
   }
 
   const std::string file_name = argv[1];
   test_gen<double>(file_name);
 
   return 0;
}

test_gen()

template<typename T >

bool test_gen ( const std::string &  expr_file )

inline

Definition at line 65 of file exprtk_testgen.cpp.

{
   typedef exprtk::expression<T> expression_t;
 
   T x = T(0);
   T y = T(0);
   T z = T(0);
   T w = T(0);
 
   exprtk::polynomial<T, 1> poly01;
   exprtk::polynomial<T, 2> poly02;
   exprtk::polynomial<T, 3> poly03;
   exprtk::polynomial<T, 4> poly04;
   exprtk::polynomial<T, 5> poly05;
   exprtk::polynomial<T, 6> poly06;
   exprtk::polynomial<T, 7> poly07;
   exprtk::polynomial<T, 8> poly08;
   exprtk::polynomial<T, 9> poly09;
   exprtk::polynomial<T,10> poly10;
   exprtk::polynomial<T,11> poly11;
   exprtk::polynomial<T,12> poly12;
 
   exprtk::symbol_table<T> symbol_table;
   symbol_table.add_constants();
   symbol_table.add_variable("x",x);
   symbol_table.add_variable("y",y);
   symbol_table.add_variable("z",z);
   symbol_table.add_variable("w",w);
   symbol_table.add_function("poly01", poly01);
   symbol_table.add_function("poly02", poly02);
   symbol_table.add_function("poly03", poly03);
   symbol_table.add_function("poly04", poly04);
   symbol_table.add_function("poly05", poly05);
   symbol_table.add_function("poly06", poly06);
   symbol_table.add_function("poly07", poly07);
   symbol_table.add_function("poly08", poly08);
   symbol_table.add_function("poly09", poly09);
   symbol_table.add_function("poly10", poly10);
   symbol_table.add_function("poly11", poly11);
   symbol_table.add_function("poly12", poly12);
 
   expression_t expression;
   expression.register_symbol_table(symbol_table);
 
   exprtk::parser<T> parser;
 
   std::deque<std::string> expr_str_list;
 
   if (0 == load_expressions(expr_file,expr_str_list))
   {
      return true;
   }
 
   std::deque<exprtk::expression<T> > expression_list;
 
   bool load_success = true;
 
   for (std::size_t i = 0; i < expr_str_list.size(); ++i)
   {
      exprtk::expression<T> current_expression;
 
      current_expression.register_symbol_table(symbol_table);
 
      if (!parser.compile(expr_str_list[i],current_expression))
      {
         load_success = false;
         printf("test_gen() - Error: %s   Expression: %s\n",
                parser.error().c_str(),
                expr_str_list[i].c_str());
      }
      else
         expression_list.push_back(current_expression);
   }
 
   if (!load_success)
      return false;
 
   for (std::size_t i = 0; i < expression_list.size(); ++i)
   {
      T result = expression_list[i].value();
 
      printf("equal((%050.30f),(%s))\n",
             result,
             expr_str_list[i].c_str());
   }
 
   return true;
}

References exprtk::symbol_table< T >::add_constants(), exprtk::symbol_table< T >::add_function(), exprtk::symbol_table< T >::add_variable(), exprtk::parser< T >::compile(), exprtk::parser< T >::error(), expression_list, load_expressions(), and exprtk::expression< T >::register_symbol_table().

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