ABELL - This treats == and >= at the same precendence level. In C++, <, >, <=, >= come before ==, !=
| 114 | //ABELL - This treats == and >= at the same precendence level. In C++, |
| 115 | // <, >, <=, >= come before ==, != |
| 116 | bool ConditionalParser::compareexpr(Expression& expr) |
| 117 | { |
| 118 | if (!addexpr(expr)) |
| 119 | return false; |
| 120 | |
| 121 | while (true) |
| 122 | { |
| 123 | NodeType type = NodeType::None; |
| 124 | |
| 125 | if (match(TokenType::Equal)) |
| 126 | type = NodeType::Equal; |
| 127 | else if (match(TokenType::NotEqual)) |
| 128 | type = NodeType::NotEqual; |
| 129 | else if (match(TokenType::Greater)) |
| 130 | type = NodeType::Greater; |
| 131 | else if (match(TokenType::GreaterEqual)) |
| 132 | type = NodeType::GreaterEqual; |
| 133 | else if (match(TokenType::Less)) |
| 134 | type = NodeType::Less; |
| 135 | else if (match(TokenType::LessEqual)) |
| 136 | type = NodeType::LessEqual; |
| 137 | else |
| 138 | return true; |
| 139 | |
| 140 | if (!addexpr(expr)) |
| 141 | return false; |
| 142 | |
| 143 | NodePtr right = expr.popNode(); |
| 144 | NodePtr left = expr.popNode(); |
| 145 | ConstValueNode *leftVal = dynamic_cast<ConstValueNode *>(left.get()); |
| 146 | ConstValueNode *rightVal = dynamic_cast<ConstValueNode *>(right.get()); |
| 147 | if (leftVal && rightVal) |
| 148 | { |
| 149 | bool b(false); |
| 150 | if (type == NodeType::Equal) |
| 151 | b = (leftVal->value() == rightVal->value()); |
| 152 | else if (type == NodeType::NotEqual) |
| 153 | b = (leftVal->value() != rightVal->value()); |
| 154 | else if (type == NodeType::Greater) |
| 155 | b = (leftVal->value() > rightVal->value()); |
| 156 | else if (type == NodeType::GreaterEqual) |
| 157 | b = (leftVal->value() >= rightVal->value()); |
| 158 | else if (type == NodeType::Less) |
| 159 | b = (leftVal->value() < rightVal->value()); |
| 160 | else if (type == NodeType::LessEqual) |
| 161 | b = (leftVal->value() <= rightVal->value()); |
| 162 | expr.pushNode(NodePtr(new ConstLogicalNode(b))); |
| 163 | } |
| 164 | else |
| 165 | { |
| 166 | if (left->isBool() || right->isBool()) |
| 167 | { |
| 168 | setError("Can't apply '" + curToken().sval() + "' to " |
| 169 | "logical expression."); |
| 170 | return false; |
| 171 | } |
| 172 | expr.pushNode(NodePtr(new CompareNode(type, std::move(left), std::move(right)))); |
| 173 | } |