| // Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// The user-definable operators in Dart. |
| /// |
| /// The names have been chosen to represent their normal semantic meaning. |
| enum Operator(final String text, final int requiredArgumentCount) { |
| add("+", 1), |
| bitwiseAnd("&", 1), |
| bitwiseNot("~", 0), |
| bitwiseOr("|", 1), |
| bitwiseXor("^", 1), |
| divide("/", 1), |
| equals("==", 1), |
| greaterThan(">", 1), |
| greaterThanEquals(">=", 1), |
| indexGet("[]", 1), |
| indexSet("[]=", 2), |
| leftShift("<<", 1), |
| lessThan("<", 1), |
| lessThanEquals("<=", 1), |
| modulo("%", 1), |
| multiply("*", 1), |
| rightShift(">>", 1), |
| tripleShift(">>>", 1), |
| subtract("-", 1), |
| truncatingDivide("~/", 1), |
| unaryMinus("unary-", 0); |
| |
| static Operator? fromText(String text) { |
| // TODO(johnniwinther): Should we have a map instead? |
| for (Operator operator in values) { |
| if (identical(operator.text, text)) { |
| return operator; |
| } |
| } |
| return null; |
| } |
| } |
