diff options
Diffstat (limited to 'contrib/llvm-project/clang/include/clang/Analysis/FlowSensitive/NoopLattice.h')
-rw-r--r-- | contrib/llvm-project/clang/include/clang/Analysis/FlowSensitive/NoopLattice.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/include/clang/Analysis/FlowSensitive/NoopLattice.h b/contrib/llvm-project/clang/include/clang/Analysis/FlowSensitive/NoopLattice.h new file mode 100644 index 000000000000..019219328111 --- /dev/null +++ b/contrib/llvm-project/clang/include/clang/Analysis/FlowSensitive/NoopLattice.h @@ -0,0 +1,41 @@ +//===-- NoopLattice.h -------------------------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// This file defines the lattice with exactly one element. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_NOOP_LATTICE_H +#define LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_NOOP_LATTICE_H + +#include "clang/Analysis/FlowSensitive/DataflowLattice.h" +#include <ostream> + +namespace clang { +namespace dataflow { + +/// Trivial lattice for dataflow analysis with exactly one element. +/// +/// Useful for analyses that only need the Environment and nothing more. +class NoopLattice { +public: + bool operator==(const NoopLattice &Other) const { return true; } + + LatticeJoinEffect join(const NoopLattice &Other) { + return LatticeJoinEffect::Unchanged; + } +}; + +inline std::ostream &operator<<(std::ostream &OS, const NoopLattice &) { + return OS << "noop"; +} + +} // namespace dataflow +} // namespace clang + +#endif // LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_NOOP_LATTICE_H |