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//===--- ExceptionSpecAnalyzer.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_UTILS_EXCEPTION_SPEC_ANALYZER_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_EXCEPTION_SPEC_ANALYZER_H
#include "clang/AST/DeclCXX.h"
#include "llvm/ADT/DenseMap.h"
namespace clang::tidy::utils {
/// This class analysis if a `FunctionDecl` has been declared implicitly through
/// defaulting or explicitly as throwing or not and evaluates noexcept
/// expressions if needed. Unlike the `ExceptionAnalyzer` however it can't tell
/// you if the function will actually throw an exception or not.
class ExceptionSpecAnalyzer {
public:
enum class State {
Throwing, ///< This function has been declared as possibly throwing.
NotThrowing, ///< This function has been declared as not throwing.
Unknown, ///< We're unable to tell if this function is declared as throwing
///< or not.
};
ExceptionSpecAnalyzer() = default;
State analyze(const FunctionDecl *FuncDecl);
private:
enum class DefaultableMemberKind {
DefaultConstructor,
CopyConstructor,
MoveConstructor,
CopyAssignment,
MoveAssignment,
Destructor,
CompareEqual,
CompareNotEqual,
CompareThreeWay,
CompareRelational,
None,
};
State analyzeImpl(const FunctionDecl *FuncDecl);
State analyzeUnresolvedOrDefaulted(const CXXMethodDecl *MethodDecl,
const FunctionProtoType *FuncProto);
State analyzeFieldDecl(const FieldDecl *FDecl, DefaultableMemberKind Kind);
State analyzeBase(const CXXBaseSpecifier &Base, DefaultableMemberKind Kind);
enum class SkipMethods : bool {
Yes = true,
No = false,
};
State analyzeRecord(const CXXRecordDecl *RecDecl, DefaultableMemberKind Kind,
SkipMethods SkipMethods = SkipMethods::No);
static State analyzeFunctionEST(const FunctionDecl *FuncDecl,
const FunctionProtoType *FuncProto);
static bool hasTrivialMemberKind(const CXXRecordDecl *RecDecl,
DefaultableMemberKind Kind);
static bool isConstructor(DefaultableMemberKind Kind);
static bool isSpecialMember(DefaultableMemberKind Kind);
static bool isComparison(DefaultableMemberKind Kind);
static DefaultableMemberKind
getDefaultableMemberKind(const FunctionDecl *FuncDecl);
llvm::DenseMap<const FunctionDecl *, State> FunctionCache{32u};
};
} // namespace clang::tidy::utils
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_EXCEPTION_SPEC_ANALYZER_H
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