| // 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.common.collect.ImmutableList; |
| import com.google.devtools.build.lib.events.Location; |
| import java.io.IOException; |
| import java.util.List; |
| |
| /** Syntax node for dictionary literals. */ |
| public final class DictionaryLiteral extends Expression { |
| |
| /** Node for an individual key-value pair in a dictionary literal. */ |
| public static final class DictionaryEntryLiteral extends ASTNode { |
| |
| private final Expression key; |
| private final Expression value; |
| |
| public DictionaryEntryLiteral(Expression key, Expression value) { |
| this.key = key; |
| this.value = value; |
| } |
| |
| public Expression getKey() { |
| return key; |
| } |
| |
| public Expression getValue() { |
| return value; |
| } |
| |
| @Override |
| public void prettyPrint(Appendable buffer, int indentLevel) throws IOException { |
| key.prettyPrint(buffer); |
| buffer.append(": "); |
| value.prettyPrint(buffer); |
| } |
| |
| @Override |
| public void accept(SyntaxTreeVisitor visitor) { |
| visitor.visit(this); |
| } |
| } |
| |
| private final ImmutableList<DictionaryEntryLiteral> entries; |
| |
| public DictionaryLiteral(List<DictionaryEntryLiteral> entries) { |
| this.entries = ImmutableList.copyOf(entries); |
| } |
| |
| /** A new literal for an empty dictionary, onto which a new location can be specified */ |
| public static DictionaryLiteral emptyDict() { |
| return new DictionaryLiteral(ImmutableList.of()); |
| } |
| |
| @Override |
| Object doEval(Environment env) throws EvalException, InterruptedException { |
| SkylarkDict<Object, Object> dict = SkylarkDict.of(env); |
| Location loc = getLocation(); |
| for (DictionaryEntryLiteral entry : entries) { |
| Object key = entry.key.eval(env); |
| Object val = entry.value.eval(env); |
| if (dict.containsKey(key)) { |
| throw new EvalException( |
| loc, "Duplicated key " + Printer.repr(key) + " when creating dictionary"); |
| } |
| dict.put(key, val, loc, env); |
| } |
| return dict; |
| } |
| |
| @Override |
| public void prettyPrint(Appendable buffer) throws IOException { |
| buffer.append("{"); |
| String sep = ""; |
| for (DictionaryEntryLiteral e : entries) { |
| buffer.append(sep); |
| e.prettyPrint(buffer); |
| sep = ", "; |
| } |
| buffer.append("}"); |
| } |
| |
| @Override |
| public void accept(SyntaxTreeVisitor visitor) { |
| visitor.visit(this); |
| } |
| |
| @Override |
| public Kind kind() { |
| return Kind.DICTIONARY_LITERAL; |
| } |
| |
| public ImmutableList<DictionaryEntryLiteral> getEntries() { |
| return entries; |
| } |
| } |