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1756630dfa
Summary:
According to [C128] "Virtual functions should specify exactly one
of `virtual`, `override`, or `final`", I've added override where a
virtual function is overriden but the explicit `override` keyword
was missing. Whenever both `virtual` and `override` were specified,
I removed `virtual`. As C.128 puts it:
> [...] writing more than one of these three is both redundant and
> a potential source of errors.
I anticipate a discussion about whether or not to add `override` to
destructors but I went for it because of an example in [ISOCPP1000].
Let me repeat the comment for you here:
Consider this code:
```
struct Base {
virtual ~Base(){}
};
struct SubClass : Base {
~SubClass() {
std::cout << "It works!\n";
}
};
int main() {
std::unique_ptr<Base> ptr = std::make_unique<SubClass>();
}
```
If for some odd reason somebody removes the `virtual` keyword from the
`Base` struct, the code will no longer print `It works!`. So adding
`override` to destructors actively protects us from accidentally
breaking our code at runtime.
[C128]: https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#c128-virtual-functions-should-specify-exactly-one-of-virtual-override-or-final
[ISOCPP1000]: https://github.com/isocpp/CppCoreGuidelines/issues/1000#issuecomment-476951555
Reviewers: teemperor, JDevlieghere, davide, shafik
Reviewed By: teemperor
Subscribers: kwk, arphaman, kadircet, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D61440
llvm-svn: 359868
68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
//===-- StructuredDataPlugin.cpp --------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Target/StructuredDataPlugin.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Interpreter/CommandInterpreter.h"
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#include "lldb/Interpreter/CommandObjectMultiword.h"
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using namespace lldb;
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using namespace lldb_private;
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namespace {
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class CommandStructuredData : public CommandObjectMultiword {
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public:
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CommandStructuredData(CommandInterpreter &interpreter)
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: CommandObjectMultiword(interpreter, "structured-data",
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"Parent for per-plugin structured data commands",
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"plugin structured-data <plugin>") {}
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~CommandStructuredData() override {}
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};
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}
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StructuredDataPlugin::StructuredDataPlugin(const ProcessWP &process_wp)
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: PluginInterface(), m_process_wp(process_wp) {}
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StructuredDataPlugin::~StructuredDataPlugin() {}
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bool StructuredDataPlugin::GetEnabled(ConstString type_name) const {
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// By default, plugins are always enabled. Plugin authors should override
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// this if there is an enabled/disabled state for their plugin.
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return true;
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}
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ProcessSP StructuredDataPlugin::GetProcess() const {
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return m_process_wp.lock();
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}
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void StructuredDataPlugin::InitializeBasePluginForDebugger(Debugger &debugger) {
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// Create our mutliword command anchor if it doesn't already exist.
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auto &interpreter = debugger.GetCommandInterpreter();
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if (!interpreter.GetCommandObject("plugin structured-data")) {
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// Find the parent command.
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auto parent_command =
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debugger.GetCommandInterpreter().GetCommandObject("plugin");
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if (!parent_command)
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return;
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// Create the structured-data ommand object.
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auto command_name = "structured-data";
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auto command_sp = CommandObjectSP(new CommandStructuredData(interpreter));
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// Hook it up under the top-level plugin command.
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parent_command->LoadSubCommand(command_name, command_sp);
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}
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}
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void StructuredDataPlugin::ModulesDidLoad(Process &process,
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ModuleList &module_list) {
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// Default implementation does nothing.
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}
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