ginac/parser/parse_context.cpp

   1 #include "parse_context.hpp"
   2 #include <sstream>
   3 #include <stdexcept>
   4 namespace GiNaC
   5 {
   6
   7 const symbol&
   8 find_or_insert_symbol(const std::string& name, symtab& syms, const bool strict)
   9 {
  10         symtab::const_iterator p = syms.find(name);
  11         if (p != syms.end())
  12                 return p->second.first;
  13
  14         if (strict)
  15                 throw std::invalid_argument(
  16                                 std::string("find_or_insert_symbol: symbol \"")
  17                                 + name + "\" not found");
  18
  19         // false means this symbol was created by parser
  20         const std::pair<symbol, bool> tmp = std::make_pair(symbol(name), false);
  21
  22         symtab::iterator i = syms.insert(symtab::value_type(name, tmp)).first;
  23         return i->second.first;
  24 }
  25
  26 }
  27