SmartPointer<Entity> Parser::compareOp(Tokenizer &tokenizer) { SmartPointer<Entity> entity = addOp(tokenizer); while (true) { if (tokenizer.getType() == TokenType::ID_TOKEN) { Operator op; string id = String::toUpper(tokenizer.getValue()); if (id == "EQ") op = Operator::EQ_OP; else if (id == "NE") op = Operator::NE_OP; else if (id == "GT") op = Operator::GT_OP; else if (id == "GE") op = Operator::GE_OP; else if (id == "LT") op = Operator::LT_OP; else if (id == "LE") op = Operator::LE_OP; if (op != Operator::NO_OP) { tokenizer.advance(); entity = new BinaryOp(op, entity, addOp(tokenizer)); continue; } } break; } return entity; }
SmartPointer<Entity> Parser::boolOp(Tokenizer &tokenizer) { SmartPointer<Entity> entity = compareOp(tokenizer); while (true) { if (tokenizer.getType() == TokenType::ID_TOKEN) { Operator op; string id = String::toUpper(tokenizer.getValue()); if (id == "AND") op = Operator::AND_OP; else if (id == "OR") op = Operator::OR_OP; else if (id == "XOR") op = Operator::XOR_OP; if (op != Operator::NO_OP) { tokenizer.advance(); entity = new BinaryOp(op, entity, compareOp(tokenizer)); } } break; } return entity; }
SmartPointer<Entity> Parser::mulOp(Tokenizer &tokenizer) { SmartPointer<Entity> entity = expOp(tokenizer); while (true) { Operator op; switch(tokenizer.getType()) { case TokenType::MUL_TOKEN: op = Operator::MUL_OP; break; case TokenType::DIV_TOKEN: op = Operator::DIV_OP; break; case TokenType::ID_TOKEN: if (String::toUpper(tokenizer.getValue()) == "MOD") op = Operator::MOD_OP; break; default: break; } if (op != Operator::NO_OP) { tokenizer.advance(); entity = new BinaryOp(op, entity, expOp(tokenizer)); } else break; } return entity; }