Update clang to r89337.

1 files changed, 163 insertions, 0 deletions

diff --git a/include/clang/Driver/OptTable.h b/include/clang/Driver/OptTable.h
new file mode 100644
index 0000000..faaeba6
--- /dev/null
+++ b/include/clang/Driver/OptTable.h
@@ -0,0 +1,163 @@
+//===--- 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 CLANG_DRIVER_OPTTABLE_H
+#define CLANG_DRIVER_OPTTABLE_H
+
+#include "clang/Driver/OptSpecifier.h"
+#include <cassert>
+
+namespace clang {
+namespace driver {
+namespace options {
+  enum DriverFlag {
+    DriverOption     = (1 << 0),
+    LinkerInput      = (1 << 1),
+    NoArgumentUnused = (1 << 2),
+    RenderAsInput    = (1 << 3),
+    RenderJoined     = (1 << 4),
+    RenderSeparate   = (1 << 5),
+    Unsupported      = (1 << 6)
+  };
+}
+
+  class Arg;
+  class InputArgList;
+  class Option;
+
+  /// OptTable - 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:
+    /// Info - Entry for a single option instance in the option data table.
+    struct Info {
+      const char *Name;
+      const char *HelpText;
+      const char *MetaVar;
+      unsigned char Kind;
+      unsigned char Flags;
+      unsigned char Param;
+      unsigned short GroupID;
+      unsigned short AliasID;
+    };
+
+  private:
+    /// The static option information table.
+    const Info *OptionInfos;
+    unsigned NumOptionInfos;
+
+    /// The lazily constructed options table, indexed by option::ID - 1.
+    mutable Option **Options;
+
+    /// Prebound input option instance.
+    const Option *TheInputOption;
+
+    /// Prebound unknown option instance.
+    const Option *TheUnknownOption;
+
+    /// 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;
+
+  private:
+    const Info &getInfo(OptSpecifier Opt) const {
+      unsigned id = Opt.getID();
+      assert(id > 0 && id - 1 < getNumOptions() && "Invalid Option ID.");
+      return OptionInfos[id - 1];
+    }
+
+    Option *CreateOption(unsigned id) const;
+
+  protected:
+    OptTable(const Info *_OptionInfos, unsigned _NumOptionInfos);
+  public:
+    ~OptTable();
+
+    /// getNumOptions - Return the total number of option classes.
+    unsigned getNumOptions() const { return NumOptionInfos; }
+
+    /// getOption - Get the given \arg id's Option instance, lazily creating it
+    /// if necessary.
+    ///
+    /// \return The option, or null for the INVALID option id.
+    const Option *getOption(OptSpecifier Opt) const {
+      unsigned id = Opt.getID();
+      if (id == 0)
+        return 0;
+
+      assert((unsigned) (id - 1) < getNumOptions() && "Invalid ID.");
+      Option *&Entry = Options[id - 1];
+      if (!Entry)
+        Entry = CreateOption(id);
+      return Entry;
+    }
+
+    /// getOptionName - Lookup the name of the given option.
+    const char *getOptionName(OptSpecifier id) const {
+      return getInfo(id).Name;
+    }
+
+    /// getOptionKind - Get the kind of the given option.
+    unsigned getOptionKind(OptSpecifier id) const {
+      return getInfo(id).Kind;
+    }
+
+    /// getOptionHelpText - Get the help text to use to describe this option.
+    const char *getOptionHelpText(OptSpecifier id) const {
+      return getInfo(id).HelpText;
+    }
+
+    /// getOptionMetaVar - 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;
+    }
+
+    /// ParseOneArg - 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.
+    ///
+    /// \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 InputArgList &Args, unsigned &Index) const;
+
+    /// ParseArgs - Parse an list of arguments into an InputArgList.
+    ///
+    /// The resulting InputArgList will reference the strings in [ArgBegin,
+    /// 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 \arg MissingArgCount will be non-zero.
+    ///
+    /// \param ArgBegin - The beginning of the argument vector.
+    /// \param ArgEnd - The end of the argument vector.
+    /// \param MissingArgIndex - On error, the index of the option which could
+    /// not be parsed.
+    /// \param MissingArgCount - On error, the number of missing options.
+    /// \return - An InputArgList; on error this will contain all the options
+    /// which could be parsed.
+    InputArgList *ParseArgs(const char **ArgBegin,
+                            const char **ArgEnd,
+                            unsigned &MissingArgIndex,
+                            unsigned &MissingArgCount) const;
+  };
+}
+}
+
+#endif