/src/llvm-project/clang/lib/Driver/ToolChains/LazyDetector.h
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1 | | //===--- LazyDetector.h - Lazy ToolChain Detection --------------*- C++ -*-===// |
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 | | |
9 | | #ifndef LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_LAZYDETECTOR_H |
10 | | #define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_LAZYDETECTOR_H |
11 | | |
12 | | #include "clang/Driver/Tool.h" |
13 | | #include "clang/Driver/ToolChain.h" |
14 | | #include <optional> |
15 | | |
16 | | namespace clang { |
17 | | |
18 | | /// Simple wrapper for toolchain detector with costly initialization. This |
19 | | /// delays the creation of the actual detector until its first usage. |
20 | | |
21 | | template <class T> class LazyDetector { |
22 | | const driver::Driver &D; |
23 | | llvm::Triple Triple; |
24 | | const llvm::opt::ArgList &Args; |
25 | | |
26 | | std::optional<T> Detector; |
27 | | |
28 | | public: |
29 | | LazyDetector(const driver::Driver &D, const llvm::Triple &Triple, |
30 | | const llvm::opt::ArgList &Args) |
31 | 0 | : D(D), Triple(Triple), Args(Args) {}Unexecuted instantiation: clang::LazyDetector<clang::driver::CudaInstallationDetector>::LazyDetector(clang::driver::Driver const&, llvm::Triple const&, llvm::opt::ArgList const&) Unexecuted instantiation: clang::LazyDetector<clang::driver::RocmInstallationDetector>::LazyDetector(clang::driver::Driver const&, llvm::Triple const&, llvm::opt::ArgList const&) |
32 | 0 | T *operator->() { |
33 | 0 | if (!Detector) |
34 | 0 | Detector.emplace(D, Triple, Args); |
35 | 0 | return &*Detector; |
36 | 0 | } Unexecuted instantiation: clang::LazyDetector<clang::driver::RocmInstallationDetector>::operator->() Unexecuted instantiation: clang::LazyDetector<clang::driver::CudaInstallationDetector>::operator->() |
37 | 0 | const T *operator->() const { |
38 | 0 | return const_cast<T const *>( |
39 | 0 | const_cast<LazyDetector &>(*this).operator->()); |
40 | 0 | } Unexecuted instantiation: clang::LazyDetector<clang::driver::RocmInstallationDetector>::operator->() const Unexecuted instantiation: clang::LazyDetector<clang::driver::CudaInstallationDetector>::operator->() const |
41 | | }; |
42 | | |
43 | | } // end namespace clang |
44 | | |
45 | | #endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_LAZYDETECTOR_H |