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// 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 com.google.devtools.build.lib.events.Location;
/** Syntax node for an augmented assignment statement. */
public final class AugmentedAssignmentStatement extends Statement {
private final Operator operator;
private final LValue lvalue;
private final Expression expression;
/** Constructs an augmented assignment: "lvalue ::= value". */
AugmentedAssignmentStatement(Operator operator, Expression lhs, Expression expression) {
this.operator = operator;
this.lvalue = new LValue(lhs);
this.expression = expression;
}
/** Returns the operator of the assignment. */
public Operator getOperator() {
return operator;
}
/** Returns the LValue of the assignment. */
public LValue getLValue() {
return lvalue;
}
/** Returns the RHS of the assignment. */
public Expression getExpression() {
return expression;
}
@Override
public String toString() {
return String.format("%s %s= %s\n", lvalue, operator, expression);
}
@Override
void doExec(Environment env) throws EvalException, InterruptedException {
Location loc = getLocation();
lvalue.assign(env, loc, expression, operator);
}
@Override
public void accept(SyntaxTreeVisitor visitor) {
visitor.visit(this);
}
@Override
void validate(ValidationEnvironment env) throws EvalException {
lvalue.validate(env, getLocation());
expression.validate(env);
}
}
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