| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| package com.google.devtools.build.lib.syntax; |
| |
| import java.util.EnumSet; |
| |
| /** A BinaryExpression represents a binary operator expression 'x op y'. */ |
| public final class BinaryOperatorExpression extends Expression { |
| |
| private final Expression x; |
| private final TokenKind op; // one of 'operators' |
| private final int opOffset; |
| private final Expression y; |
| |
| /** operators is the set of valid binary operators. */ |
| public static final EnumSet<TokenKind> operators = |
| EnumSet.of( |
| TokenKind.AND, |
| TokenKind.EQUALS_EQUALS, |
| TokenKind.GREATER, |
| TokenKind.GREATER_EQUALS, |
| TokenKind.IN, |
| TokenKind.LESS, |
| TokenKind.LESS_EQUALS, |
| TokenKind.MINUS, |
| TokenKind.NOT_EQUALS, |
| TokenKind.NOT_IN, |
| TokenKind.OR, |
| TokenKind.PERCENT, |
| TokenKind.SLASH, |
| TokenKind.SLASH_SLASH, |
| TokenKind.PLUS, |
| TokenKind.PIPE, |
| TokenKind.STAR); |
| |
| BinaryOperatorExpression( |
| FileLocations locs, Expression x, TokenKind op, int opOffset, Expression y) { |
| super(locs); |
| this.x = x; |
| this.op = op; |
| this.opOffset = opOffset; |
| this.y = y; |
| } |
| |
| /** Returns the left operand. */ |
| public Expression getX() { |
| return x; |
| } |
| |
| /** Returns the operator. */ |
| public TokenKind getOperator() { |
| return op; |
| } |
| |
| public Location getOperatorLocation() { |
| return locs.getLocation(opOffset); |
| } |
| |
| /** Returns the right operand. */ |
| public Expression getY() { |
| return y; |
| } |
| |
| @Override |
| public int getStartOffset() { |
| return x.getStartOffset(); |
| } |
| |
| @Override |
| public int getEndOffset() { |
| return y.getEndOffset(); |
| } |
| |
| @Override |
| public String toString() { |
| // This omits the parentheses for brevity, but is not correct in general due to operator |
| // precedence rules. |
| return x + " " + op + " " + y; |
| } |
| |
| @Override |
| public void accept(NodeVisitor visitor) { |
| visitor.visit(this); |
| } |
| |
| @Override |
| public Kind kind() { |
| return Kind.BINARY_OPERATOR; |
| } |
| } |