/usr/include/llvm-3.9/llvm/Option/OptTable.h is in llvm-3.9-dev 1:3.9.1-19ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | //===--- OptTable.h - Option Table ------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_OPTION_OPTTABLE_H
#define LLVM_OPTION_OPTTABLE_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/Option/OptSpecifier.h"
namespace llvm {
class raw_ostream;
namespace opt {
class Arg;
class ArgList;
class InputArgList;
class Option;
/// \brief Provide access to the Option info table.
///
/// The OptTable class provides a layer of indirection which allows Option
/// instance to be created lazily. In the common case, only a few options will
/// be needed at runtime; the OptTable class maintains enough information to
/// parse command lines without instantiating Options, while letting other
/// parts of the driver still use Option instances where convenient.
class OptTable {
public:
/// \brief Entry for a single option instance in the option data table.
struct Info {
/// A null terminated array of prefix strings to apply to name while
/// matching.
const char *const *Prefixes;
const char *Name;
const char *HelpText;
const char *MetaVar;
unsigned ID;
unsigned char Kind;
unsigned char Param;
unsigned short Flags;
unsigned short GroupID;
unsigned short AliasID;
const char *AliasArgs;
};
private:
/// \brief The static option information table.
ArrayRef<Info> OptionInfos;
bool IgnoreCase;
unsigned TheInputOptionID;
unsigned TheUnknownOptionID;
/// The index of the first option which can be parsed (i.e., is not a
/// special option like 'input' or 'unknown', and is not an option group).
unsigned FirstSearchableIndex;
/// The union of all option prefixes. If an argument does not begin with
/// one of these, it is an input.
StringSet<> PrefixesUnion;
std::string PrefixChars;
private:
const Info &getInfo(OptSpecifier Opt) const {
unsigned id = Opt.getID();
assert(id > 0 && id - 1 < getNumOptions() && "Invalid Option ID.");
return OptionInfos[id - 1];
}
protected:
OptTable(ArrayRef<Info> OptionInfos, bool IgnoreCase = false);
public:
~OptTable();
/// \brief Return the total number of option classes.
unsigned getNumOptions() const { return OptionInfos.size(); }
/// \brief Get the given Opt's Option instance, lazily creating it
/// if necessary.
///
/// \return The option, or null for the INVALID option id.
const Option getOption(OptSpecifier Opt) const;
/// \brief Lookup the name of the given option.
const char *getOptionName(OptSpecifier id) const {
return getInfo(id).Name;
}
/// \brief Get the kind of the given option.
unsigned getOptionKind(OptSpecifier id) const {
return getInfo(id).Kind;
}
/// \brief Get the group id for the given option.
unsigned getOptionGroupID(OptSpecifier id) const {
return getInfo(id).GroupID;
}
/// \brief Get the help text to use to describe this option.
const char *getOptionHelpText(OptSpecifier id) const {
return getInfo(id).HelpText;
}
/// \brief Get the meta-variable name to use when describing
/// this options values in the help text.
const char *getOptionMetaVar(OptSpecifier id) const {
return getInfo(id).MetaVar;
}
/// \brief Parse a single argument; returning the new argument and
/// updating Index.
///
/// \param [in,out] Index - The current parsing position in the argument
/// string list; on return this will be the index of the next argument
/// string to parse.
/// \param [in] FlagsToInclude - Only parse options with any of these flags.
/// Zero is the default which includes all flags.
/// \param [in] FlagsToExclude - Don't parse options with this flag. Zero
/// is the default and means exclude nothing.
///
/// \return The parsed argument, or 0 if the argument is missing values
/// (in which case Index still points at the conceptual next argument string
/// to parse).
Arg *ParseOneArg(const ArgList &Args, unsigned &Index,
unsigned FlagsToInclude = 0,
unsigned FlagsToExclude = 0) const;
/// \brief Parse an list of arguments into an InputArgList.
///
/// The resulting InputArgList will reference the strings in [\p ArgBegin,
/// \p ArgEnd), and their lifetime should extend past that of the returned
/// InputArgList.
///
/// The only error that can occur in this routine is if an argument is
/// missing values; in this case \p MissingArgCount will be non-zero.
///
/// \param MissingArgIndex - On error, the index of the option which could
/// not be parsed.
/// \param MissingArgCount - On error, the number of missing options.
/// \param FlagsToInclude - Only parse options with any of these flags.
/// Zero is the default which includes all flags.
/// \param FlagsToExclude - Don't parse options with this flag. Zero
/// is the default and means exclude nothing.
/// \return An InputArgList; on error this will contain all the options
/// which could be parsed.
InputArgList ParseArgs(ArrayRef<const char *> Args, unsigned &MissingArgIndex,
unsigned &MissingArgCount, unsigned FlagsToInclude = 0,
unsigned FlagsToExclude = 0) const;
/// \brief Render the help text for an option table.
///
/// \param OS - The stream to write the help text to.
/// \param Name - The name to use in the usage line.
/// \param Title - The title to use in the usage line.
/// \param FlagsToInclude - If non-zero, only include options with any
/// of these flags set.
/// \param FlagsToExclude - Exclude options with any of these flags set.
void PrintHelp(raw_ostream &OS, const char *Name,
const char *Title, unsigned FlagsToInclude,
unsigned FlagsToExclude) const;
void PrintHelp(raw_ostream &OS, const char *Name,
const char *Title, bool ShowHidden = false) const;
};
} // end namespace opt
} // end namespace llvm
#endif
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