1 //===- FDRLogBuilder.h - XRay FDR Log Building Utility --------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 #ifndef LLVM_INCLUDE_LLVM_XRAY_FDRLOGBUILDER_H_ 9 #define LLVM_INCLUDE_LLVM_XRAY_FDRLOGBUILDER_H_ 10 11 #include "llvm/XRay/FDRRecords.h" 12 13 namespace llvm { 14 namespace xray { 15 16 /// The LogBuilder class allows for creating ad-hoc collections of records 17 /// through the `add<...>(...)` function. An example use of this API is in 18 /// crafting arbitrary sequences of records: 19 /// 20 /// auto Records = LogBuilder() 21 /// .add<BufferExtents>(256) 22 /// .add<NewBufferRecord>(1) 23 /// .consume(); 24 /// 25 class LogBuilder { 26 std::vector<std::unique_ptr<Record>> Records; 27 28 public: add(T &&...A)29 template <class R, class... T> LogBuilder &add(T &&... A) { 30 Records.emplace_back(new R(std::forward<T>(A)...)); 31 return *this; 32 } 33 consume()34 std::vector<std::unique_ptr<Record>> consume() { return std::move(Records); } 35 }; 36 37 } // namespace xray 38 } // namespace llvm 39 40 #endif // LLVM_INCLUDE_LLVM_XRAY_FDRLOGBUILDER_H_ 41