// 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 static com.google.devtools.build.lib.syntax.compiler.ByteCodeUtils.append;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.syntax.SkylarkList.MutableList;
import com.google.devtools.build.lib.syntax.SkylarkList.Tuple;
import com.google.devtools.build.lib.syntax.compiler.ByteCodeMethodCalls;
import com.google.devtools.build.lib.syntax.compiler.ByteCodeUtils;
import com.google.devtools.build.lib.syntax.compiler.DebugInfo;
import com.google.devtools.build.lib.syntax.compiler.DebugInfo.AstAccessors;
import com.google.devtools.build.lib.syntax.compiler.NewObject;
import com.google.devtools.build.lib.syntax.compiler.VariableScope;
import com.google.devtools.build.lib.util.Preconditions;
import net.bytebuddy.implementation.bytecode.ByteCodeAppender;
import net.bytebuddy.implementation.bytecode.Duplication;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Syntax node for list and tuple literals.
*
*
(Note that during evaluation, both list and tuple values are represented by
* java.util.List objects, the only difference between them being whether or not
* they are mutable.)
*/
public final class ListLiteral extends Expression {
/**
* Types of the ListLiteral.
*/
public static enum Kind {LIST, TUPLE}
private final Kind kind;
private final List exprs;
private ListLiteral(Kind kind, List exprs) {
this.kind = kind;
this.exprs = exprs;
}
public static ListLiteral makeList(List exprs) {
return new ListLiteral(Kind.LIST, exprs);
}
public static ListLiteral makeTuple(List exprs) {
return new ListLiteral(Kind.TUPLE, exprs);
}
/** A new literal for an empty list, onto which a new location can be specified */
public static ListLiteral emptyList() {
return makeList(Collections.emptyList());
}
/**
* Returns the list of expressions for each element of the tuple.
*/
public List getElements() {
return exprs;
}
/**
* Returns true if this list is a tuple (a hash table, immutable list).
*/
public boolean isTuple() {
return kind == Kind.TUPLE;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
Printer.printList(sb, exprs, isTuple(), '"', Printer.SUGGESTED_CRITICAL_LIST_ELEMENTS_COUNT,
Printer.SUGGESTED_CRITICAL_LIST_ELEMENTS_STRING_LENGTH);
return sb.toString();
}
@Override
Object doEval(Environment env) throws EvalException, InterruptedException {
List