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;
}
