forked from OSchip/llvm-project
68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
//===--- PreferIsaOrDynCastInConditionalsCheck.h - clang-tidy ---*- 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_LLVM_PREFERISAORDYNCASTINCONDITIONALSCHECK_H
|
|
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_LLVM_PREFERISAORDYNCASTINCONDITIONALSCHECK_H
|
|
|
|
#include "../ClangTidyCheck.h"
|
|
|
|
namespace clang {
|
|
namespace tidy {
|
|
namespace llvm_check {
|
|
|
|
/// Looks at conditionals and finds and replaces cases of ``cast<>``, which will
|
|
/// assert rather than return a null pointer, and ``dyn_cast<>`` where
|
|
/// the return value is not captured. Additionally, finds and replaces cases that match the
|
|
/// pattern ``var && isa<X>(var)``, where ``var`` is evaluated twice.
|
|
///
|
|
/// Finds cases like these:
|
|
/// \code
|
|
/// if (auto x = cast<X>(y)) {}
|
|
/// // is replaced by:
|
|
/// if (auto x = dyn_cast<X>(y)) {}
|
|
///
|
|
/// if (cast<X>(y)) {}
|
|
/// // is replaced by:
|
|
/// if (isa<X>(y)) {}
|
|
///
|
|
/// if (dyn_cast<X>(y)) {}
|
|
/// // is replaced by:
|
|
/// if (isa<X>(y)) {}
|
|
///
|
|
/// if (var && isa<T>(var)) {}
|
|
/// // is replaced by:
|
|
/// if (isa_and_nonnull<T>(var.foo())) {}
|
|
/// \endcode
|
|
///
|
|
/// // Other cases are ignored, e.g.:
|
|
/// \code
|
|
/// if (auto f = cast<Z>(y)->foo()) {}
|
|
/// if (cast<Z>(y)->foo()) {}
|
|
/// if (X.cast(y)) {}
|
|
/// \endcode
|
|
///
|
|
/// For the user-facing documentation see:
|
|
/// http://clang.llvm.org/extra/clang-tidy/checks/llvm-prefer-isa-or-dyn-cast-in-conditionals.html
|
|
class PreferIsaOrDynCastInConditionalsCheck : public ClangTidyCheck {
|
|
public:
|
|
PreferIsaOrDynCastInConditionalsCheck(StringRef Name,
|
|
ClangTidyContext *Context)
|
|
: ClangTidyCheck(Name, Context) {}
|
|
bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
|
|
return LangOpts.CPlusPlus;
|
|
}
|
|
void registerMatchers(ast_matchers::MatchFinder *Finder) override;
|
|
void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
|
|
};
|
|
|
|
} // namespace llvm_check
|
|
} // namespace tidy
|
|
} // namespace clang
|
|
|
|
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_LLVM_PREFERISAORDYNCASTINCONDITIONALSCHECK_H
|