juliehockett created this revision.
juliehockett added reviewers: aaron.ballman, alexfh, hokein.
juliehockett added a project: clang-tools-extra.
Herald added subscribers: xazax.hun, mgorny.
Adds a check to the Fuchsia module to warn if an operator is overloaded, except
move and copy operators.
See https://fuchsia.googlesource.com/zircon/+/master/docs/cxx.md for reference.
https://reviews.llvm.org/D41363
Files:
clang-tidy/fuchsia/CMakeLists.txt
clang-tidy/fuchsia/FuchsiaTidyModule.cpp
clang-tidy/fuchsia/OverloadedOperatorCheck.cpp
clang-tidy/fuchsia/OverloadedOperatorCheck.h
docs/ReleaseNotes.rst
docs/clang-tidy/checks/fuchsia-overloaded-operator.rst
docs/clang-tidy/checks/list.rst
test/clang-tidy/fuchsia-overloaded-operator.cpp
Index: test/clang-tidy/fuchsia-overloaded-operator.cpp
===================================================================
--- /dev/null
+++ test/clang-tidy/fuchsia-overloaded-operator.cpp
@@ -0,0 +1,15 @@
+// RUN: %check_clang_tidy %s fuchsia-overloaded-operator %t
+
+class A {
+public:
+ int operator+(int);
+ // CHECK-MESSAGES: [[@LINE-1]]:3: warning: operator overloading is disallowed [fuchsia-overloaded-operator]
+};
+
+class B {
+public:
+ B &operator=(B other);
+ // CHECK-MESSAGES-NOT: [[@LINE-1]]:3: warning: operator overloading is disallowed [fuchsia-overloaded-operator]
+ B &operator=(B &&other);
+ // CHECK-MESSAGES-NOT: [[@LINE-1]]:3: warning: operator overloading is disallowed [fuchsia-overloaded-operator]
+};
Index: docs/clang-tidy/checks/list.rst
===================================================================
--- docs/clang-tidy/checks/list.rst
+++ docs/clang-tidy/checks/list.rst
@@ -69,6 +69,7 @@
cppcoreguidelines-slicing
cppcoreguidelines-special-member-functions
fuchsia-default-arguments
+ fuchsia-overloaded-operator
fuchsia-virtual-inheritance
google-build-explicit-make-pair
google-build-namespaces
Index: docs/clang-tidy/checks/fuchsia-overloaded-operator.rst
===================================================================
--- /dev/null
+++ docs/clang-tidy/checks/fuchsia-overloaded-operator.rst
@@ -0,0 +1,17 @@
+.. title:: clang-tidy - fuchsia-overloaded-operator
+
+fuchsia-overloaded-operator
+===========================
+
+Warns if an operator is overloaded, except for the copy and move operators.
+
+For example:
+
+.. code-block:: c++
+
+ int operator+(int); // Warning
+
+ B &operator=(B other); // No warning
+ B &operator=(B &&other) // No warning
+
+See the features disallowed in Fuchsia at https://fuchsia.googlesource.com/zircon/+/master/docs/cxx.md
Index: docs/ReleaseNotes.rst
===================================================================
--- docs/ReleaseNotes.rst
+++ docs/ReleaseNotes.rst
@@ -134,7 +134,12 @@
<http://clang.llvm.org/extra/clang-tidy/checks/fuchsia-default-arguments.html>`_ check
Warns if a function or method is declared or called with default arguments.
-
+
+- New `fuchsia-overloaded-operator
+ <http://clang.llvm.org/extra/clang-tidy/checks/fuchsia-overloaded-operator.html>`_ check
+
+ Warns if an operator is overloaded, except for the copy and move operators.
+
- New `fuchsia-virtual-inheritance
<http://clang.llvm.org/extra/clang-tidy/checks/fuchsia-virtual-inheritance.html>`_ check
Index: clang-tidy/fuchsia/OverloadedOperatorCheck.h
===================================================================
--- /dev/null
+++ clang-tidy/fuchsia/OverloadedOperatorCheck.h
@@ -0,0 +1,35 @@
+//===--- OverloadedOperatorCheck.h - clang-tidy------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_OVERLOADED_OPERATOR_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_OVERLOADED_OPERATOR_H
+
+#include "../ClangTidy.h"
+
+namespace clang {
+namespace tidy {
+namespace fuchsia {
+
+/// Operator overloading is disallowed.
+///
+/// For the user-facing documentation see:
+/// http://clang.llvm.org/extra/clang-tidy/checks/fuchsia-overloaded-operator.html
+class OverloadedOperatorCheck : public ClangTidyCheck {
+public:
+ OverloadedOperatorCheck(StringRef Name, ClangTidyContext *Context)
+ : ClangTidyCheck(Name, Context) {}
+ void registerMatchers(ast_matchers::MatchFinder *Finder) override;
+ void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+};
+
+} // namespace fuchsia
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_FUCHSIA_OVERLOADED_OPERATOR_H
Index: clang-tidy/fuchsia/OverloadedOperatorCheck.cpp
===================================================================
--- /dev/null
+++ clang-tidy/fuchsia/OverloadedOperatorCheck.cpp
@@ -0,0 +1,35 @@
+//===--- OverloadedOperatorCheck.cpp - clang-tidy--------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "OverloadedOperatorCheck.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang {
+namespace tidy {
+namespace fuchsia {
+
+AST_MATCHER(CXXMethodDecl, hasOverloadedOperator) {
+ if (Node.isCopyAssignmentOperator() || Node.isMoveAssignmentOperator())
+ return false;
+ return Node.isOverloadedOperator();
+}
+
+void OverloadedOperatorCheck::registerMatchers(MatchFinder *Finder) {
+ Finder->addMatcher(cxxMethodDecl(hasOverloadedOperator()).bind("decl"), this);
+}
+
+void OverloadedOperatorCheck::check(const MatchFinder::MatchResult &Result) {
+ if (const auto *D = Result.Nodes.getNodeAs<CXXMethodDecl>("decl"))
+ diag(D->getLocStart(), "operator overloading is disallowed");
+}
+
+} // namespace fuchsia
+} // namespace tidy
+} // namespace clang
Index: clang-tidy/fuchsia/FuchsiaTidyModule.cpp
===================================================================
--- clang-tidy/fuchsia/FuchsiaTidyModule.cpp
+++ clang-tidy/fuchsia/FuchsiaTidyModule.cpp
@@ -11,6 +11,7 @@
#include "../ClangTidyModule.h"
#include "../ClangTidyModuleRegistry.h"
#include "DefaultArgumentsCheck.h"
+#include "OverloadedOperatorCheck.h"
#include "VirtualInheritanceCheck.h"
using namespace clang::ast_matchers;
@@ -25,6 +26,8 @@
void addCheckFactories(ClangTidyCheckFactories &CheckFactories) override {
CheckFactories.registerCheck<DefaultArgumentsCheck>(
"fuchsia-default-arguments");
+ CheckFactories.registerCheck<OverloadedOperatorCheck>(
+ "fuchsia-overloaded-operator");
CheckFactories.registerCheck<VirtualInheritanceCheck>(
"fuchsia-virtual-inheritance");
}
Index: clang-tidy/fuchsia/CMakeLists.txt
===================================================================
--- clang-tidy/fuchsia/CMakeLists.txt
+++ clang-tidy/fuchsia/CMakeLists.txt
@@ -3,6 +3,7 @@
add_clang_library(clangTidyFuchsiaModule
DefaultArgumentsCheck.cpp
FuchsiaTidyModule.cpp
+ OverloadedOperatorCheck.cpp
VirtualInheritanceCheck.cpp
LINK_LIBS
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