| /* |
| * Copyright 2014-present Facebook, Inc. |
| * |
| * 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.facebook.buck.cxx; |
| |
| import com.google.common.base.Optional; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.ImmutableMultimap; |
| |
| /** |
| * Utility class for manipulating C/C++/etc. preprocessor flags specified |
| * in {@link CxxConstructorArg}. |
| */ |
| public class CxxPreprocessorFlags { |
| // Utility class; do not instantiate. |
| private CxxPreprocessorFlags() { } |
| |
| /** |
| * Converts from CxxConstructorArg.preprocessorFlags and |
| * CxxConstructorArg.langPreprocessorFlags to the multimap |
| * of (source type: [flag, flag2, ...]) pairs. |
| * |
| * If the list version of the arg is present, fills every source |
| * type with the list's value. |
| * |
| * Otherwise, converts the map version of the arg to a multimap. |
| */ |
| public static ImmutableMultimap<CxxSource.Type, String> fromArgs( |
| Optional<ImmutableList<String>> defaultFlags, |
| Optional<ImmutableMap<CxxSource.Type, ImmutableList<String>>> perLanguageFlags |
| ) { |
| |
| ImmutableMultimap.Builder<CxxSource.Type, String> result = ImmutableMultimap.builder(); |
| if (defaultFlags.isPresent()) { |
| for (CxxSource.Type type : CxxSource.Type.values()) { |
| result.putAll(type, defaultFlags.get()); |
| } |
| } |
| if (perLanguageFlags.isPresent()) { |
| for (ImmutableMap.Entry<CxxSource.Type, ImmutableList<String>> entry : |
| perLanguageFlags.get().entrySet()) { |
| result.putAll(entry.getKey(), entry.getValue()); |
| } |
| } |
| return result.build(); |
| } |
| } |