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//===- xray-registry.cpp: Implement a command registry. -------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Implement a simple subcommand registry.
//
//===----------------------------------------------------------------------===//
#include "xray-registry.h"
#include <unordered_map>
namespace llvm {
namespace xray {
using HandlerType = std::function<Error()>;
static std::unordered_map<cl::SubCommand *, HandlerType> &getCommands() {
static std::unordered_map<cl::SubCommand *, HandlerType> Commands;
return Commands;
}
CommandRegistration::CommandRegistration(cl::SubCommand *SC,
HandlerType Command) {
assert(getCommands().count(SC) == 0 &&
"Attempting to overwrite a command handler");
assert(Command && "Attempting to register an empty std::function<Error()>");
getCommands()[SC] = Command;
}
HandlerType dispatch(cl::SubCommand *SC) {
auto It = getCommands().find(SC);
assert(It != getCommands().end() &&
"Attempting to dispatch on un-registered SubCommand.");
return It->second;
}
} // namespace xray
} // namespace llvm
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