exprtk_extract_dependents.cpp File Reference

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

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Functions
template<typename T >
void	extract_expression_dependents ()
int	main ()

Function Documentation

extract_expression_dependents()

template<typename T >

void extract_expression_dependents

(

)

Definition at line 27 of file exprtk_extract_dependents.cpp.

{
   const std::string expression = "a * sin(3x) + foo(abs(y - z) / w)";
 
   exprtk::symbol_table<T> symbol_table;
 
   /*
      Note: Add any functions that are not part of the standard set
            of ExprTk functions
   */
   symbol_table.add_function("foo",[](T /*t*/)->T { return T(0); });
 
   std::deque<std::string> variable_list;
   std::deque<std::string> function_list;
 
   if (!exprtk::collect_variables(expression, symbol_table, variable_list))
   {
      printf("Error: Failed to collect variables for expression: %s\n",expression.c_str());
      variable_list.clear();
   }
 
   if (!exprtk::collect_functions(expression, symbol_table, function_list))
   {
      printf("Error: Failed to collect functions for expression: %s\n",expression.c_str());
      function_list.clear();
   }
 
   for (const auto& var : variable_list)
   {
      printf("variable: %s\n",var.c_str());
   }
 
   for (const auto& func : function_list)
   {
      printf("function: %s\n",func.c_str());
   }
}

References exprtk::symbol_table< T >::add_function(), exprtk::collect_functions(), and exprtk::collect_variables().

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main()

int main

(

)

Definition at line 65 of file exprtk_extract_dependents.cpp.

{
   extract_expression_dependents<double>();
   return 0;
}