Method parseComparative

src/Eval.cpp:461–475

/////////////////////////////////////////////////////////////////////////// Comparative --> Arithmetic {( "<=" | "<" | ">=" | ">" ) Arithmetic}

////////////////////////////////////////////////////////////////////////////////
// Comparative --> Arithmetic {( "<=" | "<" | ">=" | ">" ) Arithmetic}
bool Eval::parseComparative(std::vector<std::pair<std::string, Lexer::Type>>& infix,
                            unsigned int& i) const {
  if (i < infix.size() && parseArithmetic(infix, i)) {
    while (i < infix.size() && infix[i].second == Lexer::Type::op &&
           (infix[i].first == "<=" || infix[i].first == "<" || infix[i].first == ">=" ||
            infix[i].first == ">")) {
      ++i;
      if (!parseArithmetic(infix, i)) return false;
    }

    return true;
  }

  return false;
}

////////////////////////////////////////////////////////////////////////////////
// Arithmetic  --> Geometric {( "+" | "-" ) Geometric}