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Support enum forward decls in Objective C++
NS_ENUM changes defintion in Objective C++ based on the C++ spec being compiled with, special case the one situation where it wouldn't support doing a forward decl for the enum.
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| // Protocol Buffers - Google's data interchange format | ||
| // Copyright 2013 Google Inc. All rights reserved. | ||
| // https://developers.google.com/protocol-buffers/ | ||
| // | ||
| // Redistribution and use in source and binary forms, with or without | ||
| // modification, are permitted provided that the following conditions are | ||
| // met: | ||
| // | ||
| // * Redistributions of source code must retain the above copyright | ||
| // notice, this list of conditions and the following disclaimer. | ||
| // * Redistributions in binary form must reproduce the above | ||
| // copyright notice, this list of conditions and the following disclaimer | ||
| // in the documentation and/or other materials provided with the | ||
| // distribution. | ||
| // * Neither the name of Google Inc. nor the names of its | ||
| // contributors may be used to endorse or promote products derived from | ||
| // this software without specific prior written permission. | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | ||
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
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| #import "GPBTestUtilities.h" | ||
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| // | ||
| // This is just a compile test (here to make sure things never regress). | ||
| // | ||
| // Objective C++ can run into issues with how the NS_ENUM/CF_ENUM declartion | ||
| // works because of the C++ spec being used for that compilation unit. So | ||
| // the fact that these imports all work without errors/warning means things | ||
| // are still good. | ||
| // | ||
| // The "well know types" should have cross file enums needing imports. | ||
| #import "GPBProtocolBuffers.h" | ||
| // Some of the tests explicitly use cross file enums also. | ||
| #import "google/protobuf/Unittest.pbobjc.h" | ||
| #import "google/protobuf/UnittestImport.pbobjc.h" | ||
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| // Sanity check the conditions of the test within the Xcode project. | ||
| #if !__cplusplus | ||
| #error This isn't compiled as Objective C++? | ||
| #elif __cplusplus >= 201103L | ||
| // If this trips, it means the Xcode default might have change (or someone | ||
| // edited the testing project) and it might be time to revisit the GPB_ENUM | ||
| // define in GPBBootstrap.h. | ||
| #warning Did the Xcode default for C++ spec change? | ||
| #endif | ||
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| // Dummy XCTest. | ||
| @interface GPBObjectiveCPlusPlusTests : GPBTestCase | ||
| @end | ||
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| @implementation GPBObjectiveCPlusPlusTests | ||
| - (void)testCPlusPlus { | ||
| // Nothing, This was a compile test. | ||
| XCTAssertTrue(YES); | ||
| } | ||
| @end |