1894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//=== RegistryParser.h - Linker-supported plugin registries -----*- C++ -*-===// 2894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 3894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// The LLVM Compiler Infrastructure 4894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 5894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// This file is distributed under the University of Illinois Open Source 6894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// License. See LICENSE.TXT for details. 7894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 8894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 9894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 10894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// Defines a command-line parser for a registry. 11894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 12894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 13894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 14894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#ifndef LLVM_SUPPORT_REGISTRY_PARSER_H 15894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#define LLVM_SUPPORT_REGISTRY_PARSER_H 16894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 17894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Support/CommandLine.h" 18894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Support/Registry.h" 19894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 20894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumannamespace llvm { 21894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 22894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// A command-line parser for a registry. Use like such: 23894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// 24894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// static cl::opt<Registry<Collector>::entry, false, 25894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// RegistryParser<Collector> > 26894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// GCOpt("gc", cl::desc("Garbage collector to use."), 27894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// cl::value_desc()); 28894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// 29894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// To make use of the value: 30894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// 31894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// Collector *TheCollector = GCOpt->instantiate(); 32894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// 33894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman template <typename T, typename U = RegistryTraits<T> > 34894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman class RegistryParser : 35894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman public cl::parser<const typename U::entry*>, 36894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman public Registry<T, U>::listener { 37894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman typedef U traits; 38894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman typedef typename U::entry entry; 39894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman typedef typename Registry<T, U>::listener listener; 40894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 41894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman protected: 42894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void registered(const entry &E) { 43894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman addLiteralOption(traits::nameof(E), &E, traits::descof(E)); 44894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 45894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 46894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman public: 47894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void initialize(cl::Option &O) { 48894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman listener::init(); 49894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman cl::parser<const typename U::entry*>::initialize(O); 50894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 51894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman }; 52894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 53894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 54894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 55894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#endif // LLVM_SUPPORT_REGISTRY_PARSER_H 56