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| 1 | +#include "llvm/ADT/ArrayRef.h" |
| 2 | +#include "llvm/ADT/StringRef.h" |
| 3 | +#include "llvm/Option/ArgList.h" |
| 4 | +#include "llvm/Option/OptTable.h" |
| 5 | +#include "llvm/Support/Error.h" |
| 6 | +#include "llvm/Support/InitLLVM.h" |
| 7 | +#include "llvm/Support/raw_ostream.h" |
| 8 | + |
| 9 | +using namespace llvm; |
| 10 | +using namespace llvm::opt; |
| 11 | + |
| 12 | +namespace { |
| 13 | +enum ID { |
| 14 | + OPT_INVALID = 0, |
| 15 | +#define OPTION(PREFIXES, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, \ |
| 16 | + VISIBILITY, PARAM, HELPTEXT, HELPTEXTSFORVARIANTS, METAVAR, \ |
| 17 | + VALUES, SUBCOMMANDIDS_OFFSET) \ |
| 18 | + OPT_##ID, |
| 19 | +#include "Opts.inc" |
| 20 | +#undef OPTION |
| 21 | +}; |
| 22 | +#define OPTTABLE_STR_TABLE_CODE |
| 23 | +#include "Opts.inc" |
| 24 | +#undef OPTTABLE_STR_TABLE_CODE |
| 25 | + |
| 26 | +#define OPTTABLE_PREFIXES_TABLE_CODE |
| 27 | +#include "Opts.inc" |
| 28 | +#undef OPTTABLE_PREFIXES_TABLE_CODE |
| 29 | + |
| 30 | +#define OPTTABLE_SUBCOMMAND_IDS_TABLE_CODE |
| 31 | +#include "Opts.inc" |
| 32 | +#undef OPTTABLE_SUBCOMMAND_IDS_TABLE_CODE |
| 33 | + |
| 34 | +#define OPTTABLE_SUBCOMMANDS_CODE |
| 35 | +#include "Opts.inc" |
| 36 | +#undef OPTTABLE_SUBCOMMANDS_CODE |
| 37 | + |
| 38 | +static constexpr OptTable::Info InfoTable[] = { |
| 39 | +#define OPTION(...) LLVM_CONSTRUCT_OPT_INFO(__VA_ARGS__), |
| 40 | +#include "Opts.inc" |
| 41 | +#undef OPTION |
| 42 | +}; |
| 43 | + |
| 44 | +class HelloSubOptTable : public GenericOptTable { |
| 45 | +public: |
| 46 | + HelloSubOptTable() |
| 47 | + : GenericOptTable(OptionStrTable, OptionPrefixesTable, InfoTable, |
| 48 | + /*IgnoreCase=*/false, OptionSubCommands, |
| 49 | + OptionSubCommandIDsTable) {} |
| 50 | +}; |
| 51 | +} // namespace |
| 52 | + |
| 53 | +int main(int argc, char **argv) { |
| 54 | + InitLLVM X(argc, argv); |
| 55 | + HelloSubOptTable T; |
| 56 | + unsigned MissingArgIndex, MissingArgCount; |
| 57 | + |
| 58 | + auto HandleMultipleSubcommands = [](ArrayRef<StringRef> SubCommands) { |
| 59 | + assert(SubCommands.size() > 1); |
| 60 | + llvm::errs() << "error: more than one subcommand passed [\n"; |
| 61 | + for (auto SC : SubCommands) |
| 62 | + llvm::errs() << " `" << SC << "`\n"; |
| 63 | + llvm::errs() << "]\n"; |
| 64 | + llvm::errs() << "See --help.\n"; |
| 65 | + exit(1); |
| 66 | + }; |
| 67 | + |
| 68 | + auto HandleOtherPositionals = [](ArrayRef<StringRef> Positionals) { |
| 69 | + assert(!Positionals.empty()); |
| 70 | + llvm::errs() << "error: unknown positional argument(s) [\n"; |
| 71 | + for (auto SC : Positionals) |
| 72 | + llvm::errs() << " `" << SC << "`\n"; |
| 73 | + llvm::errs() << "]\n"; |
| 74 | + llvm::errs() << "See --help.\n"; |
| 75 | + exit(1); |
| 76 | + }; |
| 77 | + |
| 78 | + InputArgList Args = T.ParseArgs(ArrayRef(argv + 1, argc - 1), MissingArgIndex, |
| 79 | + MissingArgCount); |
| 80 | + |
| 81 | + StringRef SubCommand = Args.getSubCommand( |
| 82 | + T.getSubCommands(), HandleMultipleSubcommands, HandleOtherPositionals); |
| 83 | + // Handle help. When help options is found, ignore all other options and exit |
| 84 | + // after printing help. |
| 85 | + |
| 86 | + if (Args.hasArg(OPT_help)) { |
| 87 | + T.printHelp(llvm::outs(), "llvm-hello-sub [subcommand] [options]", |
| 88 | + "LLVM Hello SubCommand Example", false, false, Visibility(), |
| 89 | + SubCommand); |
| 90 | + return 0; |
| 91 | + } |
| 92 | + |
| 93 | + auto HandleSubCommandArg = [&](ID OptionType) { |
| 94 | + if (!Args.hasArg(OptionType)) |
| 95 | + return false; |
| 96 | + auto O = T.getOption(OptionType); |
| 97 | + if (!O.isRegisteredSC(SubCommand)) { |
| 98 | + llvm::errs() << "Option [" << O.getName() |
| 99 | + << "] is not valid for SubCommand [" << SubCommand << "]\n"; |
| 100 | + return false; |
| 101 | + } |
| 102 | + return true; |
| 103 | + }; |
| 104 | + |
| 105 | + bool HasUnknownOptions = false; |
| 106 | + for (const Arg *A : Args.filtered(OPT_UNKNOWN)) { |
| 107 | + HasUnknownOptions = true; |
| 108 | + llvm::errs() << "Unknown option `" << A->getAsString(Args) << "'\n"; |
| 109 | + } |
| 110 | + if (HasUnknownOptions) { |
| 111 | + llvm::errs() << "See `OptSubcommand --help`.\n"; |
| 112 | + return 1; |
| 113 | + } |
| 114 | + if (SubCommand.empty()) { |
| 115 | + if (Args.hasArg(OPT_version)) |
| 116 | + llvm::outs() << "LLVM Hello SubCommand Example 1.0\n"; |
| 117 | + } else if (SubCommand == "foo") { |
| 118 | + if (HandleSubCommandArg(OPT_uppercase)) |
| 119 | + llvm::outs() << "FOO\n"; |
| 120 | + else if (HandleSubCommandArg(OPT_lowercase)) |
| 121 | + llvm::outs() << "foo\n"; |
| 122 | + |
| 123 | + if (HandleSubCommandArg(OPT_version)) |
| 124 | + llvm::outs() << "LLVM Hello SubCommand foo Example 1.0\n"; |
| 125 | + |
| 126 | + } else if (SubCommand == "bar") { |
| 127 | + if (HandleSubCommandArg(OPT_lowercase)) |
| 128 | + llvm::outs() << "bar\n"; |
| 129 | + else if (HandleSubCommandArg(OPT_uppercase)) |
| 130 | + llvm::outs() << "BAR\n"; |
| 131 | + |
| 132 | + if (HandleSubCommandArg(OPT_version)) |
| 133 | + llvm::outs() << "LLVM Hello SubCommand bar Example 1.0\n"; |
| 134 | + } |
| 135 | + |
| 136 | + return 0; |
| 137 | +} |
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