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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#pragma once
#include <cstddef>
#include <clang/AST/DeclBase.h>
#include <clang/AST/Decl.h>
#include <clang/AST/Type.h>
#include <clang/Basic/OperatorKinds.h>
namespace loplugin {
class ContextCheck;
class TerminalCheck;
namespace detail {
inline ContextCheck checkRecordDecl(
clang::Decl const * decl, clang::TagTypeKind tag, llvm::StringRef id);
}
class DeclCheck;
class TypeCheck {
public:
explicit TypeCheck(clang::QualType type): type_(type) {}
explicit TypeCheck(clang::Type const * type): type_(type, 0) {}
explicit TypeCheck(clang::TypeDecl const * decl): type_(decl->getTypeForDecl(), 0) {}
explicit operator bool() const { return !type_.isNull(); }
TypeCheck NonConst() const;
TypeCheck NonConstVolatile() const;
TypeCheck Const() const;
TypeCheck Volatile() const;
TypeCheck ConstVolatile() const;
TypeCheck ConstNonVolatile() const;
TerminalCheck Void() const;
TerminalCheck Char() const;
TerminalCheck AnyBoolean() const;
TypeCheck Pointer() const;
TerminalCheck Enum() const;
TypeCheck LvalueReference() const;
TypeCheck RvalueReference() const;
inline ContextCheck Class(llvm::StringRef id) const;
inline ContextCheck Struct(llvm::StringRef id) const;
inline ContextCheck ClassOrStruct(llvm::StringRef id) const;
TypeCheck Typedef() const;
inline ContextCheck Typedef(llvm::StringRef id) const;
DeclCheck TemplateSpecializationClass() const;
TypeCheck NotSubstTemplateTypeParmType() const;
private:
TypeCheck() = default;
clang::QualType const type_{};
};
class DeclCheck {
friend TypeCheck;
public:
explicit DeclCheck(clang::Decl const * decl): decl_(decl) {}
explicit operator bool() const { return decl_ != nullptr; }
inline ContextCheck Class(llvm::StringRef id) const;
inline ContextCheck Struct(llvm::StringRef id) const;
inline ContextCheck ClassOrStruct(llvm::StringRef id) const;
inline ContextCheck Union(llvm::StringRef id) const;
inline ContextCheck Function(llvm::StringRef id) const;
ContextCheck Operator(clang::OverloadedOperatorKind op) const;
inline ContextCheck Var(llvm::StringRef id) const;
ContextCheck MemberFunction() const;
private:
DeclCheck() = default;
clang::Decl const * const decl_ = nullptr;
};
class ContextCheck {
public:
explicit ContextCheck(clang::DeclContext const * context = nullptr):
context_(context) {}
explicit operator bool() const { return context_ != nullptr; }
TerminalCheck GlobalNamespace() const;
inline ContextCheck Namespace(llvm::StringRef id) const;
TerminalCheck StdNamespace() const;
TerminalCheck StdOrNestedNamespace() const;
ContextCheck AnonymousNamespace() const;
inline ContextCheck Class(llvm::StringRef id) const;
inline ContextCheck Struct(llvm::StringRef id) const;
explicit ContextCheck(const clang::NamespaceDecl * decl ) : context_( decl ) {}
private:
clang::DeclContext const * const context_;
};
class TerminalCheck {
public:
explicit operator bool() const { return satisfied_; }
private:
friend ContextCheck;
friend TypeCheck;
explicit TerminalCheck(bool satisfied): satisfied_(satisfied) {}
bool const satisfied_;
};
typedef std::function<bool(clang::Decl const *)> DeclChecker;
// Returns true if the class has a base matching the checker, or if the class itself matches.
bool isDerivedFrom(const clang::CXXRecordDecl *decl, DeclChecker base);
namespace detail {
ContextCheck checkRecordDecl(
clang::Decl const * decl, clang::TagTypeKind tag, llvm::StringRef id)
{
auto r = llvm::dyn_cast_or_null<clang::RecordDecl>(decl);
if (r != nullptr && r->getTagKind() == tag) {
auto const i = r->getIdentifier();
if (i != nullptr && i->getName() == id) {
return ContextCheck(r->getDeclContext());
}
}
return ContextCheck();
}
}
ContextCheck TypeCheck::Class(llvm::StringRef id)
const
{
if (!type_.isNull()) {
auto const t = type_->getAs<clang::RecordType>();
if (t != nullptr) {
return detail::checkRecordDecl(t->getDecl(), clang::TTK_Class, id);
}
}
return ContextCheck();
}
ContextCheck TypeCheck::Struct(llvm::StringRef id) const
{
if (!type_.isNull()) {
auto const t = type_->getAs<clang::RecordType>();
if (t != nullptr) {
return detail::checkRecordDecl(t->getDecl(), clang::TTK_Struct, id);
}
}
return ContextCheck();
}
ContextCheck TypeCheck::ClassOrStruct(llvm::StringRef id) const
{
auto const c1 = Class(id);
if (c1) {
return c1;
}
return Struct(id);
}
ContextCheck TypeCheck::Typedef(llvm::StringRef id) const
{
if (!type_.isNull()) {
if (auto const t = type_->getAs<clang::TypedefType>()) {
auto const d = t->getDecl();
auto const i = d->getIdentifier();
assert(i != nullptr);
if (i->getName() == id) {
return ContextCheck(d->getDeclContext());
}
}
}
return ContextCheck();
}
ContextCheck DeclCheck::Class(llvm::StringRef id) const
{
return detail::checkRecordDecl(decl_, clang::TTK_Class, id);
}
ContextCheck DeclCheck::Struct(llvm::StringRef id) const
{
return detail::checkRecordDecl(decl_, clang::TTK_Struct, id);
}
ContextCheck DeclCheck::ClassOrStruct(llvm::StringRef id) const
{
auto const c1 = Class(id);
if (c1) {
return c1;
}
return Struct(id);
}
ContextCheck DeclCheck::Union(llvm::StringRef id) const
{
return detail::checkRecordDecl(decl_, clang::TTK_Union, id);
}
ContextCheck DeclCheck::Function(llvm::StringRef id) const
{
auto f = llvm::dyn_cast_or_null<clang::FunctionDecl>(decl_);
if (f != nullptr) {
auto const i = f->getIdentifier();
if (i != nullptr && i->getName() == id) {
return ContextCheck(f->getDeclContext());
}
}
return ContextCheck();
}
ContextCheck DeclCheck::Var(llvm::StringRef id) const
{
auto f = llvm::dyn_cast_or_null<clang::VarDecl>(decl_);
if (f != nullptr) {
auto const i = f->getIdentifier();
if (i != nullptr && i->getName() == id) {
return ContextCheck(f->getDeclContext());
}
}
return ContextCheck();
}
ContextCheck ContextCheck::Namespace(llvm::StringRef id) const
{
if (context_) {
auto n = llvm::dyn_cast<clang::NamespaceDecl>(context_);
if (n != nullptr) {
auto const i = n->getIdentifier();
if (i != nullptr && i->getName() == id) {
return ContextCheck(n->getParent());
}
}
}
return ContextCheck();
}
ContextCheck ContextCheck::Class(llvm::StringRef id) const
{
return detail::checkRecordDecl(
llvm::dyn_cast_or_null<clang::Decl>(context_), clang::TTK_Class, id);
}
ContextCheck ContextCheck::Struct(llvm::StringRef id) const
{
return detail::checkRecordDecl(
llvm::dyn_cast_or_null<clang::Decl>(context_), clang::TTK_Struct, id);
}
bool isExtraWarnUnusedType(clang::QualType type);
bool isOkToRemoveArithmeticCast(
clang::ASTContext & context, clang::QualType t1, clang::QualType t2,
const clang::Expr* subExpr);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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