1 //=== RegistryParser.h - Linker-supported plugin registries -----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Defines a command-line parser for a registry.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_SUPPORT_REGISTRY_PARSER_H
15 #define LLVM_SUPPORT_REGISTRY_PARSER_H
17 #include "llvm/Support/CommandLine.h"
18 #include "llvm/Support/Registry.h"
22 /// A command-line parser for a registry. Use like such:
24 /// static cl::opt<Registry<Collector>::entry, false,
25 /// RegistryParser<Collector> >
26 /// GCOpt("gc", cl::desc("Garbage collector to use."),
27 /// cl::value_desc());
29 /// To make use of the value:
31 /// Collector *TheCollector = GCOpt->instantiate();
33 template <typename T, typename U = RegistryTraits<T> >
34 class RegistryParser :
35 public cl::parser<const typename U::entry*>,
36 public Registry<T, U>::listener {
38 typedef typename U::entry entry;
39 typedef typename Registry<T, U>::listener listener;
42 void registered(const entry &E) {
43 addLiteralOption(traits::nameof(E), &E, traits::descof(E));
47 void initialize(cl::Option &O) {
49 cl::parser<const typename U::entry*>::initialize(O);
55 #endif // LLVM_SUPPORT_REGISTRY_PARSER_H