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56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
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//=== RegistryParser.h - Linker-supported plugin registries -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Defines a command-line parser for a registry.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_REGISTRY_PARSER_H
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#define LLVM_SUPPORT_REGISTRY_PARSER_H
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Registry.h"
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namespace llvm {
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/// A command-line parser for a registry. Use like such:
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///
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/// static cl::opt<Registry<Collector>::entry, false,
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/// RegistryParser<Collector> >
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/// GCOpt("gc", cl::desc("Garbage collector to use."),
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/// cl::value_desc());
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///
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/// To make use of the value:
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///
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/// Collector *TheCollector = GCOpt->instantiate();
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///
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template <typename T, typename U = RegistryTraits<T> >
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class RegistryParser :
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public cl::parser<const typename U::entry*>,
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public Registry<T, U>::listener {
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typedef U traits;
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typedef typename U::entry entry;
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typedef typename Registry<T, U>::listener listener;
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protected:
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void registered(const entry &E) {
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addLiteralOption(traits::nameof(E), &E, traits::descof(E));
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}
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public:
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void initialize(cl::Option &O) {
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listener::init();
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cl::parser<const typename U::entry*>::initialize(O);
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}
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};
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}
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#endif // LLVM_SUPPORT_REGISTRY_PARSER_H
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