//===-- CommandLine.cpp - Command line parser implementation --------------===//
//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
// This class implements a command line argument processor that is useful when
// creating a tool. It provides a simple, minimalistic interface that is easily
// extensible and supports nonlocal (library) command line options.
//
+// Note that rather than trying to figure out what this code does, you could try
+// reading the library documentation located in docs/CommandLine.html
+//
//===----------------------------------------------------------------------===//
+#include "llvm/Config/config.h"
#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/STLExtras.h"
-#include <vector>
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/System/Path.h"
#include <algorithm>
+#include <functional>
#include <map>
+#include <ostream>
#include <set>
+#include <cstdlib>
+#include <cerrno>
+#include <cstring>
+using namespace llvm;
using namespace cl;
-// Return the global command line option vector. Making it a function scoped
-// static ensures that it will be initialized before its first use correctly.
+//===----------------------------------------------------------------------===//
+// Template instantiations and anchors.
//
-static map<string, Option*> &getOpts() {
- static map<string,Option*> CommandLineOptions;
- return CommandLineOptions;
+TEMPLATE_INSTANTIATION(class basic_parser<bool>);
+TEMPLATE_INSTANTIATION(class basic_parser<boolOrDefault>);
+TEMPLATE_INSTANTIATION(class basic_parser<int>);
+TEMPLATE_INSTANTIATION(class basic_parser<unsigned>);
+TEMPLATE_INSTANTIATION(class basic_parser<double>);
+TEMPLATE_INSTANTIATION(class basic_parser<float>);
+TEMPLATE_INSTANTIATION(class basic_parser<std::string>);
+
+TEMPLATE_INSTANTIATION(class opt<unsigned>);
+TEMPLATE_INSTANTIATION(class opt<int>);
+TEMPLATE_INSTANTIATION(class opt<std::string>);
+TEMPLATE_INSTANTIATION(class opt<bool>);
+
+void Option::anchor() {}
+void basic_parser_impl::anchor() {}
+void parser<bool>::anchor() {}
+void parser<boolOrDefault>::anchor() {}
+void parser<int>::anchor() {}
+void parser<unsigned>::anchor() {}
+void parser<double>::anchor() {}
+void parser<float>::anchor() {}
+void parser<std::string>::anchor() {}
+
+//===----------------------------------------------------------------------===//
+
+// Globals for name and overview of program. Program name is not a string to
+// avoid static ctor/dtor issues.
+static char ProgramName[80] = "<premain>";
+static const char *ProgramOverview = 0;
+
+// This collects additional help to be printed.
+static ManagedStatic<std::vector<const char*> > MoreHelp;
+
+extrahelp::extrahelp(const char *Help)
+ : morehelp(Help) {
+ MoreHelp->push_back(Help);
}
-static void AddArgument(const string &ArgName, Option *Opt) {
- if (getOpts().find(ArgName) != getOpts().end()) {
- cerr << "CommandLine Error: Argument '" << ArgName
- << "' specified more than once!\n";
- } else {
- getOpts()[ArgName] = Opt; // Add argument to the argument map!
+static bool OptionListChanged = false;
+
+// MarkOptionsChanged - Internal helper function.
+void cl::MarkOptionsChanged() {
+ OptionListChanged = true;
+}
+
+/// RegisteredOptionList - This is the list of the command line options that
+/// have statically constructed themselves.
+static Option *RegisteredOptionList = 0;
+
+void Option::addArgument() {
+ assert(NextRegistered == 0 && "argument multiply registered!");
+
+ NextRegistered = RegisteredOptionList;
+ RegisteredOptionList = this;
+ MarkOptionsChanged();
+}
+
+
+//===----------------------------------------------------------------------===//
+// Basic, shared command line option processing machinery.
+//
+
+/// GetOptionInfo - Scan the list of registered options, turning them into data
+/// structures that are easier to handle.
+static void GetOptionInfo(std::vector<Option*> &PositionalOpts,
+ std::map<std::string, Option*> &OptionsMap) {
+ std::vector<const char*> OptionNames;
+ Option *CAOpt = 0; // The ConsumeAfter option if it exists.
+ for (Option *O = RegisteredOptionList; O; O = O->getNextRegisteredOption()) {
+ // If this option wants to handle multiple option names, get the full set.
+ // This handles enum options like "-O1 -O2" etc.
+ O->getExtraOptionNames(OptionNames);
+ if (O->ArgStr[0])
+ OptionNames.push_back(O->ArgStr);
+
+ // Handle named options.
+ for (unsigned i = 0, e = OptionNames.size(); i != e; ++i) {
+ // Add argument to the argument map!
+ if (!OptionsMap.insert(std::pair<std::string,Option*>(OptionNames[i],
+ O)).second) {
+ cerr << ProgramName << ": CommandLine Error: Argument '"
+ << OptionNames[0] << "' defined more than once!\n";
+ }
+ }
+
+ OptionNames.clear();
+
+ // Remember information about positional options.
+ if (O->getFormattingFlag() == cl::Positional)
+ PositionalOpts.push_back(O);
+ else if (O->getNumOccurrencesFlag() == cl::ConsumeAfter) {
+ if (CAOpt)
+ O->error("Cannot specify more than one option with cl::ConsumeAfter!");
+ CAOpt = O;
+ }
}
+
+ if (CAOpt)
+ PositionalOpts.push_back(CAOpt);
+
+ // Make sure that they are in order of registration not backwards.
+ std::reverse(PositionalOpts.begin(), PositionalOpts.end());
}
-static const char *ProgramName = 0;
-static const char *ProgramOverview = 0;
-void cl::ParseCommandLineOptions(int &argc, char **argv,
- const char *Overview = 0) {
- ProgramName = argv[0]; // Save this away safe and snug
+/// LookupOption - Lookup the option specified by the specified option on the
+/// command line. If there is a value specified (after an equal sign) return
+/// that as well.
+static Option *LookupOption(const char *&Arg, const char *&Value,
+ std::map<std::string, Option*> &OptionsMap) {
+ while (*Arg == '-') ++Arg; // Eat leading dashes
+
+ const char *ArgEnd = Arg;
+ while (*ArgEnd && *ArgEnd != '=')
+ ++ArgEnd; // Scan till end of argument name.
+
+ if (*ArgEnd == '=') // If we have an equals sign...
+ Value = ArgEnd+1; // Get the value, not the equals
+
+
+ if (*Arg == 0) return 0;
+
+ // Look up the option.
+ std::map<std::string, Option*>::iterator I =
+ OptionsMap.find(std::string(Arg, ArgEnd));
+ return I != OptionsMap.end() ? I->second : 0;
+}
+
+static inline bool ProvideOption(Option *Handler, const char *ArgName,
+ const char *Value, int argc, char **argv,
+ int &i) {
+ // Enforce value requirements
+ switch (Handler->getValueExpectedFlag()) {
+ case ValueRequired:
+ if (Value == 0) { // No value specified?
+ if (i+1 < argc) { // Steal the next argument, like for '-o filename'
+ Value = argv[++i];
+ } else {
+ return Handler->error(" requires a value!");
+ }
+ }
+ break;
+ case ValueDisallowed:
+ if (Value)
+ return Handler->error(" does not allow a value! '" +
+ std::string(Value) + "' specified.");
+ break;
+ case ValueOptional:
+ break;
+ default:
+ cerr << ProgramName
+ << ": Bad ValueMask flag! CommandLine usage error:"
+ << Handler->getValueExpectedFlag() << "\n";
+ abort();
+ break;
+ }
+
+ // Run the handler now!
+ return Handler->addOccurrence(i, ArgName, Value ? Value : "");
+}
+
+static bool ProvidePositionalOption(Option *Handler, const std::string &Arg,
+ int i) {
+ int Dummy = i;
+ return ProvideOption(Handler, Handler->ArgStr, Arg.c_str(), 0, 0, Dummy);
+}
+
+
+// Option predicates...
+static inline bool isGrouping(const Option *O) {
+ return O->getFormattingFlag() == cl::Grouping;
+}
+static inline bool isPrefixedOrGrouping(const Option *O) {
+ return isGrouping(O) || O->getFormattingFlag() == cl::Prefix;
+}
+
+// getOptionPred - Check to see if there are any options that satisfy the
+// specified predicate with names that are the prefixes in Name. This is
+// checked by progressively stripping characters off of the name, checking to
+// see if there options that satisfy the predicate. If we find one, return it,
+// otherwise return null.
+//
+static Option *getOptionPred(std::string Name, unsigned &Length,
+ bool (*Pred)(const Option*),
+ std::map<std::string, Option*> &OptionsMap) {
+
+ std::map<std::string, Option*>::iterator OMI = OptionsMap.find(Name);
+ if (OMI != OptionsMap.end() && Pred(OMI->second)) {
+ Length = Name.length();
+ return OMI->second;
+ }
+
+ if (Name.size() == 1) return 0;
+ do {
+ Name.erase(Name.end()-1, Name.end()); // Chop off the last character...
+ OMI = OptionsMap.find(Name);
+
+ // Loop while we haven't found an option and Name still has at least two
+ // characters in it (so that the next iteration will not be the empty
+ // string...
+ } while ((OMI == OptionsMap.end() || !Pred(OMI->second)) && Name.size() > 1);
+
+ if (OMI != OptionsMap.end() && Pred(OMI->second)) {
+ Length = Name.length();
+ return OMI->second; // Found one!
+ }
+ return 0; // No option found!
+}
+
+static bool RequiresValue(const Option *O) {
+ return O->getNumOccurrencesFlag() == cl::Required ||
+ O->getNumOccurrencesFlag() == cl::OneOrMore;
+}
+
+static bool EatsUnboundedNumberOfValues(const Option *O) {
+ return O->getNumOccurrencesFlag() == cl::ZeroOrMore ||
+ O->getNumOccurrencesFlag() == cl::OneOrMore;
+}
+
+/// ParseCStringVector - Break INPUT up wherever one or more
+/// whitespace characters are found, and store the resulting tokens in
+/// OUTPUT. The tokens stored in OUTPUT are dynamically allocated
+/// using strdup (), so it is the caller's responsibility to free ()
+/// them later.
+///
+static void ParseCStringVector(std::vector<char *> &output,
+ const char *input) {
+ // Characters which will be treated as token separators:
+ static const char *delims = " \v\f\t\r\n";
+
+ std::string work (input);
+ // Skip past any delims at head of input string.
+ size_t pos = work.find_first_not_of (delims);
+ // If the string consists entirely of delims, then exit early.
+ if (pos == std::string::npos) return;
+ // Otherwise, jump forward to beginning of first word.
+ work = work.substr (pos);
+ // Find position of first delimiter.
+ pos = work.find_first_of (delims);
+
+ while (!work.empty() && pos != std::string::npos) {
+ // Everything from 0 to POS is the next word to copy.
+ output.push_back (strdup (work.substr (0,pos).c_str ()));
+ // Is there another word in the string?
+ size_t nextpos = work.find_first_not_of (delims, pos + 1);
+ if (nextpos != std::string::npos) {
+ // Yes? Then remove delims from beginning ...
+ work = work.substr (work.find_first_not_of (delims, pos + 1));
+ // and find the end of the word.
+ pos = work.find_first_of (delims);
+ } else {
+ // No? (Remainder of string is delims.) End the loop.
+ work = "";
+ pos = std::string::npos;
+ }
+ }
+
+ // If `input' ended with non-delim char, then we'll get here with
+ // the last word of `input' in `work'; copy it now.
+ if (!work.empty ()) {
+ output.push_back (strdup (work.c_str ()));
+ }
+}
+
+/// ParseEnvironmentOptions - An alternative entry point to the
+/// CommandLine library, which allows you to read the program's name
+/// from the caller (as PROGNAME) and its command-line arguments from
+/// an environment variable (whose name is given in ENVVAR).
+///
+void cl::ParseEnvironmentOptions(const char *progName, const char *envVar,
+ const char *Overview) {
+ // Check args.
+ assert(progName && "Program name not specified");
+ assert(envVar && "Environment variable name missing");
+
+ // Get the environment variable they want us to parse options out of.
+ const char *envValue = getenv(envVar);
+ if (!envValue)
+ return;
+
+ // Get program's "name", which we wouldn't know without the caller
+ // telling us.
+ std::vector<char*> newArgv;
+ newArgv.push_back(strdup(progName));
+
+ // Parse the value of the environment variable into a "command line"
+ // and hand it off to ParseCommandLineOptions().
+ ParseCStringVector(newArgv, envValue);
+ int newArgc = newArgv.size();
+ ParseCommandLineOptions(newArgc, &newArgv[0], Overview);
+
+ // Free all the strdup()ed strings.
+ for (std::vector<char*>::iterator i = newArgv.begin(), e = newArgv.end();
+ i != e; ++i)
+ free (*i);
+}
+
+void cl::ParseCommandLineOptions(int argc, char **argv,
+ const char *Overview) {
+ // Process all registered options.
+ std::vector<Option*> PositionalOpts;
+ std::map<std::string, Option*> Opts;
+ GetOptionInfo(PositionalOpts, Opts);
+
+ assert((!Opts.empty() || !PositionalOpts.empty()) &&
+ "No options specified!");
+ sys::Path progname(argv[0]);
+
+ // Copy the program name into ProgName, making sure not to overflow it.
+ std::string ProgName = sys::Path(argv[0]).getLast();
+ if (ProgName.size() > 79) ProgName.resize(79);
+ strcpy(ProgramName, ProgName.c_str());
+
ProgramOverview = Overview;
bool ErrorParsing = false;
+ // Check out the positional arguments to collect information about them.
+ unsigned NumPositionalRequired = 0;
+
+ // Determine whether or not there are an unlimited number of positionals
+ bool HasUnlimitedPositionals = false;
+
+ Option *ConsumeAfterOpt = 0;
+ if (!PositionalOpts.empty()) {
+ if (PositionalOpts[0]->getNumOccurrencesFlag() == cl::ConsumeAfter) {
+ assert(PositionalOpts.size() > 1 &&
+ "Cannot specify cl::ConsumeAfter without a positional argument!");
+ ConsumeAfterOpt = PositionalOpts[0];
+ }
+
+ // Calculate how many positional values are _required_.
+ bool UnboundedFound = false;
+ for (unsigned i = ConsumeAfterOpt != 0, e = PositionalOpts.size();
+ i != e; ++i) {
+ Option *Opt = PositionalOpts[i];
+ if (RequiresValue(Opt))
+ ++NumPositionalRequired;
+ else if (ConsumeAfterOpt) {
+ // ConsumeAfter cannot be combined with "optional" positional options
+ // unless there is only one positional argument...
+ if (PositionalOpts.size() > 2)
+ ErrorParsing |=
+ Opt->error(" error - this positional option will never be matched, "
+ "because it does not Require a value, and a "
+ "cl::ConsumeAfter option is active!");
+ } else if (UnboundedFound && !Opt->ArgStr[0]) {
+ // This option does not "require" a value... Make sure this option is
+ // not specified after an option that eats all extra arguments, or this
+ // one will never get any!
+ //
+ ErrorParsing |= Opt->error(" error - option can never match, because "
+ "another positional argument will match an "
+ "unbounded number of values, and this option"
+ " does not require a value!");
+ }
+ UnboundedFound |= EatsUnboundedNumberOfValues(Opt);
+ }
+ HasUnlimitedPositionals = UnboundedFound || ConsumeAfterOpt;
+ }
+
+ // PositionalVals - A vector of "positional" arguments we accumulate into
+ // the process at the end...
+ //
+ std::vector<std::pair<std::string,unsigned> > PositionalVals;
+
+ // If the program has named positional arguments, and the name has been run
+ // across, keep track of which positional argument was named. Otherwise put
+ // the positional args into the PositionalVals list...
+ Option *ActivePositionalArg = 0;
+
// Loop over all of the arguments... processing them.
+ bool DashDashFound = false; // Have we read '--'?
for (int i = 1; i < argc; ++i) {
Option *Handler = 0;
- const char *Value = "";
+ const char *Value = 0;
const char *ArgName = "";
- if (argv[i][0] != '-') { // Unnamed argument?
- Handler = getOpts()[""];
- Value = argv[i];
- } else { // We start with a - or --, eat dashes
- ArgName = argv[i]+1;
- while (*ArgName == '-') ++ArgName; // Eat leading dashes
-
- const char *ArgNameEnd = ArgName;
- while (*ArgNameEnd && *ArgNameEnd != '=') ++ArgNameEnd; // Scan till end
- Value = ArgNameEnd;
- if (*Value) // If we have an equals sign...
- ++Value; // Advance to value...
+ // If the option list changed, this means that some command line
+ // option has just been registered or deregistered. This can occur in
+ // response to things like -load, etc. If this happens, rescan the options.
+ if (OptionListChanged) {
+ PositionalOpts.clear();
+ Opts.clear();
+ GetOptionInfo(PositionalOpts, Opts);
+ OptionListChanged = false;
+ }
+
+ // Check to see if this is a positional argument. This argument is
+ // considered to be positional if it doesn't start with '-', if it is "-"
+ // itself, or if we have seen "--" already.
+ //
+ if (argv[i][0] != '-' || argv[i][1] == 0 || DashDashFound) {
+ // Positional argument!
+ if (ActivePositionalArg) {
+ ProvidePositionalOption(ActivePositionalArg, argv[i], i);
+ continue; // We are done!
+ } else if (!PositionalOpts.empty()) {
+ PositionalVals.push_back(std::make_pair(argv[i],i));
+
+ // All of the positional arguments have been fulfulled, give the rest to
+ // the consume after option... if it's specified...
+ //
+ if (PositionalVals.size() >= NumPositionalRequired &&
+ ConsumeAfterOpt != 0) {
+ for (++i; i < argc; ++i)
+ PositionalVals.push_back(std::make_pair(argv[i],i));
+ break; // Handle outside of the argument processing loop...
+ }
+
+ // Delay processing positional arguments until the end...
+ continue;
+ }
+ } else if (argv[i][0] == '-' && argv[i][1] == '-' && argv[i][2] == 0 &&
+ !DashDashFound) {
+ DashDashFound = true; // This is the mythical "--"?
+ continue; // Don't try to process it as an argument itself.
+ } else if (ActivePositionalArg &&
+ (ActivePositionalArg->getMiscFlags() & PositionalEatsArgs)) {
+ // If there is a positional argument eating options, check to see if this
+ // option is another positional argument. If so, treat it as an argument,
+ // otherwise feed it to the eating positional.
+ ArgName = argv[i]+1;
+ Handler = LookupOption(ArgName, Value, Opts);
+ if (!Handler || Handler->getFormattingFlag() != cl::Positional) {
+ ProvidePositionalOption(ActivePositionalArg, argv[i], i);
+ continue; // We are done!
+ }
- if (*ArgName != 0) {
- string ArgNameStr(ArgName, ArgNameEnd); // Extract arg name part
- Handler = getOpts()[ArgNameStr];
+ } else { // We start with a '-', must be an argument...
+ ArgName = argv[i]+1;
+ Handler = LookupOption(ArgName, Value, Opts);
+
+ // Check to see if this "option" is really a prefixed or grouped argument.
+ if (Handler == 0) {
+ std::string RealName(ArgName);
+ if (RealName.size() > 1) {
+ unsigned Length = 0;
+ Option *PGOpt = getOptionPred(RealName, Length, isPrefixedOrGrouping,
+ Opts);
+
+ // If the option is a prefixed option, then the value is simply the
+ // rest of the name... so fall through to later processing, by
+ // setting up the argument name flags and value fields.
+ //
+ if (PGOpt && PGOpt->getFormattingFlag() == cl::Prefix) {
+ Value = ArgName+Length;
+ assert(Opts.find(std::string(ArgName, Value)) != Opts.end() &&
+ Opts.find(std::string(ArgName, Value))->second == PGOpt);
+ Handler = PGOpt;
+ } else if (PGOpt) {
+ // This must be a grouped option... handle them now.
+ assert(isGrouping(PGOpt) && "Broken getOptionPred!");
+
+ do {
+ // Move current arg name out of RealName into RealArgName...
+ std::string RealArgName(RealName.begin(),
+ RealName.begin() + Length);
+ RealName.erase(RealName.begin(), RealName.begin() + Length);
+
+ // Because ValueRequired is an invalid flag for grouped arguments,
+ // we don't need to pass argc/argv in...
+ //
+ assert(PGOpt->getValueExpectedFlag() != cl::ValueRequired &&
+ "Option can not be cl::Grouping AND cl::ValueRequired!");
+ int Dummy;
+ ErrorParsing |= ProvideOption(PGOpt, RealArgName.c_str(),
+ 0, 0, 0, Dummy);
+
+ // Get the next grouping option...
+ PGOpt = getOptionPred(RealName, Length, isGrouping, Opts);
+ } while (PGOpt && Length != RealName.size());
+
+ Handler = PGOpt; // Ate all of the options.
+ }
+ }
}
}
if (Handler == 0) {
- cerr << "Unknown command line argument '" << argv[i] << "'. Try: "
- << argv[0] << " --help\n'";
+ cerr << ProgramName << ": Unknown command line argument '"
+ << argv[i] << "'. Try: '" << argv[0] << " --help'\n";
ErrorParsing = true;
continue;
}
- // Enforce value requirements
- switch (Handler->Flags & ValueMask) {
- case ValueRequired:
- if (Value == 0 || *Value == 0) { // No value specified?
- if (i+1 < argc) { // Steal the next argument, like for '-o filename'
- Value = argv[++i];
- } else {
- ErrorParsing = Handler->error(" requires a value!");
- continue;
- }
+ // Check to see if this option accepts a comma separated list of values. If
+ // it does, we have to split up the value into multiple values...
+ if (Value && Handler->getMiscFlags() & CommaSeparated) {
+ std::string Val(Value);
+ std::string::size_type Pos = Val.find(',');
+
+ while (Pos != std::string::npos) {
+ // Process the portion before the comma...
+ ErrorParsing |= ProvideOption(Handler, ArgName,
+ std::string(Val.begin(),
+ Val.begin()+Pos).c_str(),
+ argc, argv, i);
+ // Erase the portion before the comma, AND the comma...
+ Val.erase(Val.begin(), Val.begin()+Pos+1);
+ Value += Pos+1; // Increment the original value pointer as well...
+
+ // Check for another comma...
+ Pos = Val.find(',');
}
- break;
- case ValueDisallowed:
- if (*Value != 0) {
- ErrorParsing = Handler->error(" does not allow a value! '" +
- string(Value) + "' specified.");
- continue;
+ }
+
+ // If this is a named positional argument, just remember that it is the
+ // active one...
+ if (Handler->getFormattingFlag() == cl::Positional)
+ ActivePositionalArg = Handler;
+ else
+ ErrorParsing |= ProvideOption(Handler, ArgName, Value, argc, argv, i);
+ }
+
+ // Check and handle positional arguments now...
+ if (NumPositionalRequired > PositionalVals.size()) {
+ cerr << ProgramName
+ << ": Not enough positional command line arguments specified!\n"
+ << "Must specify at least " << NumPositionalRequired
+ << " positional arguments: See: " << argv[0] << " --help\n";
+
+ ErrorParsing = true;
+ } else if (!HasUnlimitedPositionals
+ && PositionalVals.size() > PositionalOpts.size()) {
+ cerr << ProgramName
+ << ": Too many positional arguments specified!\n"
+ << "Can specify at most " << PositionalOpts.size()
+ << " positional arguments: See: " << argv[0] << " --help\n";
+ ErrorParsing = true;
+
+ } else if (ConsumeAfterOpt == 0) {
+ // Positional args have already been handled if ConsumeAfter is specified...
+ unsigned ValNo = 0, NumVals = PositionalVals.size();
+ for (unsigned i = 0, e = PositionalOpts.size(); i != e; ++i) {
+ if (RequiresValue(PositionalOpts[i])) {
+ ProvidePositionalOption(PositionalOpts[i], PositionalVals[ValNo].first,
+ PositionalVals[ValNo].second);
+ ValNo++;
+ --NumPositionalRequired; // We fulfilled our duty...
}
- break;
- case Optional: break;
- default: cerr << "Bad ValueMask flag! CommandLine usage error!\n"; abort();
+
+ // If we _can_ give this option more arguments, do so now, as long as we
+ // do not give it values that others need. 'Done' controls whether the
+ // option even _WANTS_ any more.
+ //
+ bool Done = PositionalOpts[i]->getNumOccurrencesFlag() == cl::Required;
+ while (NumVals-ValNo > NumPositionalRequired && !Done) {
+ switch (PositionalOpts[i]->getNumOccurrencesFlag()) {
+ case cl::Optional:
+ Done = true; // Optional arguments want _at most_ one value
+ // FALL THROUGH
+ case cl::ZeroOrMore: // Zero or more will take all they can get...
+ case cl::OneOrMore: // One or more will take all they can get...
+ ProvidePositionalOption(PositionalOpts[i],
+ PositionalVals[ValNo].first,
+ PositionalVals[ValNo].second);
+ ValNo++;
+ break;
+ default:
+ assert(0 && "Internal error, unexpected NumOccurrences flag in "
+ "positional argument processing!");
+ }
+ }
+ }
+ } else {
+ assert(ConsumeAfterOpt && NumPositionalRequired <= PositionalVals.size());
+ unsigned ValNo = 0;
+ for (unsigned j = 1, e = PositionalOpts.size(); j != e; ++j)
+ if (RequiresValue(PositionalOpts[j])) {
+ ErrorParsing |= ProvidePositionalOption(PositionalOpts[j],
+ PositionalVals[ValNo].first,
+ PositionalVals[ValNo].second);
+ ValNo++;
+ }
+
+ // Handle the case where there is just one positional option, and it's
+ // optional. In this case, we want to give JUST THE FIRST option to the
+ // positional option and keep the rest for the consume after. The above
+ // loop would have assigned no values to positional options in this case.
+ //
+ if (PositionalOpts.size() == 2 && ValNo == 0 && !PositionalVals.empty()) {
+ ErrorParsing |= ProvidePositionalOption(PositionalOpts[1],
+ PositionalVals[ValNo].first,
+ PositionalVals[ValNo].second);
+ ValNo++;
}
- // Run the handler now!
- ErrorParsing |= Handler->addOccurance(ArgName, Value);
+ // Handle over all of the rest of the arguments to the
+ // cl::ConsumeAfter command line option...
+ for (; ValNo != PositionalVals.size(); ++ValNo)
+ ErrorParsing |= ProvidePositionalOption(ConsumeAfterOpt,
+ PositionalVals[ValNo].first,
+ PositionalVals[ValNo].second);
}
- // TODO: loop over args and make sure all required args are specified!
+ // Loop over args and make sure all required args are specified!
+ for (std::map<std::string, Option*>::iterator I = Opts.begin(),
+ E = Opts.end(); I != E; ++I) {
+ switch (I->second->getNumOccurrencesFlag()) {
+ case Required:
+ case OneOrMore:
+ if (I->second->getNumOccurrences() == 0) {
+ I->second->error(" must be specified at least once!");
+ ErrorParsing = true;
+ }
+ // Fall through
+ default:
+ break;
+ }
+ }
- // Free all of the memory allocated to the vector. Command line options may
- // only be processed once!
- getOpts().clear();
+ // Free all of the memory allocated to the map. Command line options may only
+ // be processed once!
+ Opts.clear();
+ PositionalOpts.clear();
+ MoreHelp->clear();
// If we had an error processing our arguments, don't let the program execute
if (ErrorParsing) exit(1);
//===----------------------------------------------------------------------===//
// Option Base class implementation
//
-Option::Option(const char *argStr, const char *helpStr, int flags)
- : NumOccurances(0), ArgStr(argStr), HelpStr(helpStr), Flags(flags) {
- AddArgument(ArgStr, this);
-}
-bool Option::error(string Message, const char *ArgName = 0) {
+bool Option::error(std::string Message, const char *ArgName) {
if (ArgName == 0) ArgName = ArgStr;
- cerr << "-" << ArgName << " option" << Message << endl;
+ if (ArgName[0] == 0)
+ cerr << HelpStr; // Be nice for positional arguments
+ else
+ cerr << ProgramName << ": for the -" << ArgName;
+
+ cerr << " option: " << Message << "\n";
return true;
}
-bool Option::addOccurance(const char *ArgName, const string &Value) {
- NumOccurances++; // Increment the number of times we have been seen
+bool Option::addOccurrence(unsigned pos, const char *ArgName,
+ const std::string &Value) {
+ NumOccurrences++; // Increment the number of times we have been seen
- switch (Flags & OccurancesMask) {
+ switch (getNumOccurrencesFlag()) {
case Optional:
- if (NumOccurances > 1)
+ if (NumOccurrences > 1)
return error(": may only occur zero or one times!", ArgName);
break;
case Required:
- if (NumOccurances > 1)
+ if (NumOccurrences > 1)
return error(": must occur exactly one time!", ArgName);
// Fall through
case OneOrMore:
- case ZeroOrMore: break;
- default: return error(": bad num occurances flag value!");
+ case ZeroOrMore:
+ case ConsumeAfter: break;
+ default: return error(": bad num occurrences flag value!");
}
- return handleOccurance(ArgName, Value);
+ return handleOccurrence(pos, ArgName, Value);
}
+
+// getValueStr - Get the value description string, using "DefaultMsg" if nothing
+// has been specified yet.
+//
+static const char *getValueStr(const Option &O, const char *DefaultMsg) {
+ if (O.ValueStr[0] == 0) return DefaultMsg;
+ return O.ValueStr;
+}
+
+//===----------------------------------------------------------------------===//
+// cl::alias class implementation
+//
+
// Return the width of the option tag for printing...
-unsigned Option::getOptionWidth() const {
+unsigned alias::getOptionWidth() const {
return std::strlen(ArgStr)+6;
}
-void Option::printOptionInfo(unsigned GlobalWidth) const {
+// Print out the option for the alias.
+void alias::printOptionInfo(unsigned GlobalWidth) const {
unsigned L = std::strlen(ArgStr);
- if (L == 0) return; // Don't print the empty arg like this!
- cerr << " -" << ArgStr << string(GlobalWidth-L-6, ' ') << " - "
- << HelpStr << endl;
+ cout << " -" << ArgStr << std::string(GlobalWidth-L-6, ' ') << " - "
+ << HelpStr << "\n";
}
+
//===----------------------------------------------------------------------===//
-// Boolean/flag command line option implementation
+// Parser Implementation code...
//
-bool Flag::handleOccurance(const char *ArgName, const string &Arg) {
- if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
- Arg == "1") {
- Value = true;
- } else if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
- Value = false;
- } else {
- return error(": '" + Arg + "' is invalid value for boolean argument! Try 0 or 1");
- }
+// basic_parser implementation
+//
- return false;
-}
+// Return the width of the option tag for printing...
+unsigned basic_parser_impl::getOptionWidth(const Option &O) const {
+ unsigned Len = std::strlen(O.ArgStr);
+ if (const char *ValName = getValueName())
+ Len += std::strlen(getValueStr(O, ValName))+3;
-//===----------------------------------------------------------------------===//
-// Integer valued command line option implementation
-//
-bool Int::handleOccurance(const char *ArgName, const string &Arg) {
- const char *ArgStart = Arg.c_str();
- char *End;
- Value = (int)strtol(ArgStart, &End, 0);
- if (*End != 0)
- return error(": '" + Arg + "' value invalid for integer argument!");
- return false;
+ return Len + 6;
}
-//===----------------------------------------------------------------------===//
-// String valued command line option implementation
+// printOptionInfo - Print out information about this option. The
+// to-be-maintained width is specified.
//
-bool String::handleOccurance(const char *ArgName, const string &Arg) {
- Value = Arg;
- return false;
-}
+void basic_parser_impl::printOptionInfo(const Option &O,
+ unsigned GlobalWidth) const {
+ cout << " -" << O.ArgStr;
-//===----------------------------------------------------------------------===//
-// Enum valued command line option implementation
-//
-void EnumBase::processValues(va_list Vals) {
- while (const char *EnumName = va_arg(Vals, const char *)) {
- int EnumVal = va_arg(Vals, int);
- const char *EnumDesc = va_arg(Vals, const char *);
- ValueMap.push_back(make_pair(EnumName, // Add value to value map
- make_pair(EnumVal, EnumDesc)));
- }
-}
+ if (const char *ValName = getValueName())
+ cout << "=<" << getValueStr(O, ValName) << ">";
-// registerArgs - notify the system about these new arguments
-void EnumBase::registerArgs() {
- for (unsigned i = 0; i < ValueMap.size(); ++i)
- AddArgument(ValueMap[i].first, this);
+ cout << std::string(GlobalWidth-getOptionWidth(O), ' ') << " - "
+ << O.HelpStr << "\n";
}
-const char *EnumBase::getArgName(int ID) const {
- for (unsigned i = 0; i < ValueMap.size(); ++i)
- if (ID == ValueMap[i].second.first) return ValueMap[i].first;
- return "";
-}
-const char *EnumBase::getArgDescription(int ID) const {
- for (unsigned i = 0; i < ValueMap.size(); ++i)
- if (ID == ValueMap[i].second.first) return ValueMap[i].second.second;
- return "";
-}
-bool EnumValueBase::handleOccurance(const char *ArgName, const string &Arg) {
- unsigned i;
- for (i = 0; i < ValueMap.size(); ++i)
- if (ValueMap[i].first == Arg) break;
- if (i == ValueMap.size())
- return error(": unrecognized alternative '"+Arg+"'!");
- Value = ValueMap[i].second.first;
+// parser<bool> implementation
+//
+bool parser<bool>::parse(Option &O, const char *ArgName,
+ const std::string &Arg, bool &Value) {
+ if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
+ Arg == "1") {
+ Value = true;
+ } else if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
+ Value = false;
+ } else {
+ return O.error(": '" + Arg +
+ "' is invalid value for boolean argument! Try 0 or 1");
+ }
return false;
}
-// Return the width of the option tag for printing...
-unsigned EnumValueBase::getOptionWidth() const {
- unsigned BaseSize = Option::getOptionWidth();
- for (unsigned i = 0; i < ValueMap.size(); ++i)
- BaseSize = max(BaseSize, std::strlen(ValueMap[i].first)+8);
- return BaseSize;
+// parser<boolOrDefault> implementation
+//
+bool parser<boolOrDefault>::parse(Option &O, const char *ArgName,
+ const std::string &Arg, boolOrDefault &Value) {
+ if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
+ Arg == "1") {
+ Value = BOU_TRUE;
+ } else if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
+ Value = BOU_FALSE;
+ } else {
+ return O.error(": '" + Arg +
+ "' is invalid value for boolean argument! Try 0 or 1");
+ }
+ return false;
}
-// printOptionInfo - Print out information about this option. The
-// to-be-maintained width is specified.
+// parser<int> implementation
//
-void EnumValueBase::printOptionInfo(unsigned GlobalWidth) const {
- Option::printOptionInfo(GlobalWidth);
- for (unsigned i = 0; i < ValueMap.size(); ++i) {
- unsigned NumSpaces = GlobalWidth-strlen(ValueMap[i].first)-8;
- cerr << " =" << ValueMap[i].first << string(NumSpaces, ' ') << " - "
- << ValueMap[i].second.second;
-
- if (i == 0) cerr << " (default)";
- cerr << endl;
- }
+bool parser<int>::parse(Option &O, const char *ArgName,
+ const std::string &Arg, int &Value) {
+ char *End;
+ Value = (int)strtol(Arg.c_str(), &End, 0);
+ if (*End != 0)
+ return O.error(": '" + Arg + "' value invalid for integer argument!");
+ return false;
}
-//===----------------------------------------------------------------------===//
-// Enum flags command line option implementation
+// parser<unsigned> implementation
//
+bool parser<unsigned>::parse(Option &O, const char *ArgName,
+ const std::string &Arg, unsigned &Value) {
+ char *End;
+ errno = 0;
+ unsigned long V = strtoul(Arg.c_str(), &End, 0);
+ Value = (unsigned)V;
+ if (((V == ULONG_MAX) && (errno == ERANGE))
+ || (*End != 0)
+ || (Value != V))
+ return O.error(": '" + Arg + "' value invalid for uint argument!");
+ return false;
+}
-bool EnumFlagsBase::handleOccurance(const char *ArgName, const string &Arg) {
- return EnumValueBase::handleOccurance("", ArgName);
+// parser<double>/parser<float> implementation
+//
+static bool parseDouble(Option &O, const std::string &Arg, double &Value) {
+ const char *ArgStart = Arg.c_str();
+ char *End;
+ Value = strtod(ArgStart, &End);
+ if (*End != 0)
+ return O.error(": '" +Arg+ "' value invalid for floating point argument!");
+ return false;
}
-unsigned EnumFlagsBase::getOptionWidth() const {
- unsigned BaseSize = 0;
- for (unsigned i = 0; i < ValueMap.size(); ++i)
- BaseSize = max(BaseSize, std::strlen(ValueMap[i].first)+6);
- return BaseSize;
+bool parser<double>::parse(Option &O, const char *AN,
+ const std::string &Arg, double &Val) {
+ return parseDouble(O, Arg, Val);
}
-void EnumFlagsBase::printOptionInfo(unsigned GlobalWidth) const {
- for (unsigned i = 0; i < ValueMap.size(); ++i) {
- unsigned L = std::strlen(ValueMap[i].first);
- cerr << " -" << ValueMap[i].first << string(GlobalWidth-L-6, ' ') << " - "
- << ValueMap[i].second.second;
- if (i == 0) cerr << " (default)";
- cerr << endl;
- }
+bool parser<float>::parse(Option &O, const char *AN,
+ const std::string &Arg, float &Val) {
+ double dVal;
+ if (parseDouble(O, Arg, dVal))
+ return true;
+ Val = (float)dVal;
+ return false;
}
-//===----------------------------------------------------------------------===//
-// Enum list command line option implementation
+
+// generic_parser_base implementation
//
-bool EnumListBase::handleOccurance(const char *ArgName, const string &Arg) {
- unsigned i;
- for (i = 0; i < ValueMap.size(); ++i)
- if (ValueMap[i].first == string(ArgName)) break;
- if (i == ValueMap.size())
- return error(": CommandLine INTERNAL ERROR", ArgName);
- Values.push_back(ValueMap[i].second.first);
- return false;
+// findOption - Return the option number corresponding to the specified
+// argument string. If the option is not found, getNumOptions() is returned.
+//
+unsigned generic_parser_base::findOption(const char *Name) {
+ unsigned i = 0, e = getNumOptions();
+ std::string N(Name);
+
+ while (i != e)
+ if (getOption(i) == N)
+ return i;
+ else
+ ++i;
+ return e;
}
+
// Return the width of the option tag for printing...
-unsigned EnumListBase::getOptionWidth() const {
- unsigned BaseSize = 0;
- for (unsigned i = 0; i < ValueMap.size(); ++i)
- BaseSize = max(BaseSize, std::strlen(ValueMap[i].first)+6);
- return BaseSize;
+unsigned generic_parser_base::getOptionWidth(const Option &O) const {
+ if (O.hasArgStr()) {
+ unsigned Size = std::strlen(O.ArgStr)+6;
+ for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
+ Size = std::max(Size, (unsigned)std::strlen(getOption(i))+8);
+ return Size;
+ } else {
+ unsigned BaseSize = 0;
+ for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
+ BaseSize = std::max(BaseSize, (unsigned)std::strlen(getOption(i))+8);
+ return BaseSize;
+ }
}
-
-// printOptionInfo - Print out information about this option. The
+// printOptionInfo - Print out information about this option. The
// to-be-maintained width is specified.
//
-void EnumListBase::printOptionInfo(unsigned GlobalWidth) const {
- for (unsigned i = 0; i < ValueMap.size(); ++i) {
- unsigned L = std::strlen(ValueMap[i].first);
- cerr << " -" << ValueMap[i].first << string(GlobalWidth-L-6, ' ') << " - "
- << ValueMap[i].second.second << endl;
+void generic_parser_base::printOptionInfo(const Option &O,
+ unsigned GlobalWidth) const {
+ if (O.hasArgStr()) {
+ unsigned L = std::strlen(O.ArgStr);
+ cout << " -" << O.ArgStr << std::string(GlobalWidth-L-6, ' ')
+ << " - " << O.HelpStr << "\n";
+
+ for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
+ unsigned NumSpaces = GlobalWidth-strlen(getOption(i))-8;
+ cout << " =" << getOption(i) << std::string(NumSpaces, ' ')
+ << " - " << getDescription(i) << "\n";
+ }
+ } else {
+ if (O.HelpStr[0])
+ cout << " " << O.HelpStr << "\n";
+ for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
+ unsigned L = std::strlen(getOption(i));
+ cout << " -" << getOption(i) << std::string(GlobalWidth-L-8, ' ')
+ << " - " << getDescription(i) << "\n";
+ }
}
}
//===----------------------------------------------------------------------===//
-// Help option... always automatically provided.
+// --help and --help-hidden option implementation
//
-namespace {
-// isHidden/isReallyHidden - Predicates to be used to filter down arg lists.
-inline bool isHidden(pair<string, Option *> &OptPair) {
- return (OptPair.second->Flags & HiddenMask) == Hidden;
-}
-inline bool isReallyHidden(pair<string, Option *> &OptPair) {
- return (OptPair.second->Flags & HiddenMask) == ReallyHidden;
-}
+namespace {
-class Help : public Option {
+class HelpPrinter {
unsigned MaxArgLen;
const Option *EmptyArg;
const bool ShowHidden;
- virtual bool handleOccurance(const char *ArgName, const string &Arg) {
+ // isHidden/isReallyHidden - Predicates to be used to filter down arg lists.
+ inline static bool isHidden(std::pair<std::string, Option *> &OptPair) {
+ return OptPair.second->getOptionHiddenFlag() >= Hidden;
+ }
+ inline static bool isReallyHidden(std::pair<std::string, Option *> &OptPair) {
+ return OptPair.second->getOptionHiddenFlag() == ReallyHidden;
+ }
+
+public:
+ HelpPrinter(bool showHidden) : ShowHidden(showHidden) {
+ EmptyArg = 0;
+ }
+
+ void operator=(bool Value) {
+ if (Value == false) return;
+
+ // Get all the options.
+ std::vector<Option*> PositionalOpts;
+ std::map<std::string, Option*> OptMap;
+ GetOptionInfo(PositionalOpts, OptMap);
+
// Copy Options into a vector so we can sort them as we like...
- vector<pair<string, Option*> > Options;
- copy(getOpts().begin(), getOpts().end(), back_inserter(Options));
+ std::vector<std::pair<std::string, Option*> > Opts;
+ copy(OptMap.begin(), OptMap.end(), std::back_inserter(Opts));
// Eliminate Hidden or ReallyHidden arguments, depending on ShowHidden
- Options.erase(remove_if(Options.begin(), Options.end(),
- ptr_fun(ShowHidden ? isReallyHidden : isHidden)),
- Options.end());
+ Opts.erase(std::remove_if(Opts.begin(), Opts.end(),
+ std::ptr_fun(ShowHidden ? isReallyHidden : isHidden)),
+ Opts.end());
// Eliminate duplicate entries in table (from enum flags options, f.e.)
- set<Option*> OptionSet;
- for (unsigned i = 0; i < Options.size(); )
- if (OptionSet.count(Options[i].second) == 0)
- OptionSet.insert(Options[i++].second); // Add to set
- else
- Options.erase(Options.begin()+i); // Erase duplicate
-
+ { // Give OptionSet a scope
+ std::set<Option*> OptionSet;
+ for (unsigned i = 0; i != Opts.size(); ++i)
+ if (OptionSet.count(Opts[i].second) == 0)
+ OptionSet.insert(Opts[i].second); // Add new entry to set
+ else
+ Opts.erase(Opts.begin()+i--); // Erase duplicate
+ }
if (ProgramOverview)
- cerr << "OVERVIEW:" << ProgramOverview << endl;
- // TODO: Sort options by some criteria
+ cout << "OVERVIEW: " << ProgramOverview << "\n";
+
+ cout << "USAGE: " << ProgramName << " [options]";
- cerr << "USAGE: " << ProgramName << " [options]\n\n";
- // TODO: print usage nicer
+ // Print out the positional options.
+ Option *CAOpt = 0; // The cl::ConsumeAfter option, if it exists...
+ if (!PositionalOpts.empty() &&
+ PositionalOpts[0]->getNumOccurrencesFlag() == ConsumeAfter)
+ CAOpt = PositionalOpts[0];
+
+ for (unsigned i = CAOpt != 0, e = PositionalOpts.size(); i != e; ++i) {
+ if (PositionalOpts[i]->ArgStr[0])
+ cout << " --" << PositionalOpts[i]->ArgStr;
+ cout << " " << PositionalOpts[i]->HelpStr;
+ }
+
+ // Print the consume after option info if it exists...
+ if (CAOpt) cout << " " << CAOpt->HelpStr;
+
+ cout << "\n\n";
// Compute the maximum argument length...
MaxArgLen = 0;
- for_each(Options.begin(), Options.end(),
- bind_obj(this, &Help::getMaxArgLen));
+ for (unsigned i = 0, e = Opts.size(); i != e; ++i)
+ MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth());
- cerr << "OPTIONS:\n";
- for_each(Options.begin(), Options.end(),
- bind_obj(this, &Help::printOption));
+ cout << "OPTIONS:\n";
+ for (unsigned i = 0, e = Opts.size(); i != e; ++i)
+ Opts[i].second->printOptionInfo(MaxArgLen);
- return true; // Displaying help is cause to terminate the program
- }
+ // Print any extra help the user has declared.
+ for (std::vector<const char *>::iterator I = MoreHelp->begin(),
+ E = MoreHelp->end(); I != E; ++I)
+ cout << *I;
+ MoreHelp->clear();
- void getMaxArgLen(pair<string, Option *> OptPair) {
- const Option *Opt = OptPair.second;
- if (Opt->ArgStr[0] == 0) EmptyArg = Opt; // Capture the empty arg if exists
- MaxArgLen = max(MaxArgLen, Opt->getOptionWidth());
+ // Halt the program since help information was printed
+ exit(1);
}
+};
+} // End anonymous namespace
- void printOption(pair<string, Option *> OptPair) {
- const Option *Opt = OptPair.second;
- Opt->printOptionInfo(MaxArgLen);
- }
+// Define the two HelpPrinter instances that are used to print out help, or
+// help-hidden...
+//
+static HelpPrinter NormalPrinter(false);
+static HelpPrinter HiddenPrinter(true);
+
+static cl::opt<HelpPrinter, true, parser<bool> >
+HOp("help", cl::desc("Display available options (--help-hidden for more)"),
+ cl::location(NormalPrinter), cl::ValueDisallowed);
+static cl::opt<HelpPrinter, true, parser<bool> >
+HHOp("help-hidden", cl::desc("Display all available options"),
+ cl::location(HiddenPrinter), cl::Hidden, cl::ValueDisallowed);
+
+static void (*OverrideVersionPrinter)() = 0;
+
+namespace {
+class VersionPrinter {
public:
- inline Help(const char *ArgVal, const char *HelpVal, bool showHidden)
- : Option(ArgVal, HelpVal, showHidden ? Hidden : 0), ShowHidden(showHidden) {
- EmptyArg = 0;
+ void print() {
+ cout << "Low Level Virtual Machine (http://llvm.org/):\n";
+ cout << " " << PACKAGE_NAME << " version " << PACKAGE_VERSION;
+#ifdef LLVM_VERSION_INFO
+ cout << LLVM_VERSION_INFO;
+#endif
+ cout << "\n ";
+#ifndef __OPTIMIZE__
+ cout << "DEBUG build";
+#else
+ cout << "Optimized build";
+#endif
+#ifndef NDEBUG
+ cout << " with assertions";
+#endif
+ cout << ".\n";
+ }
+ void operator=(bool OptionWasSpecified) {
+ if (OptionWasSpecified) {
+ if (OverrideVersionPrinter == 0) {
+ print();
+ exit(1);
+ } else {
+ (*OverrideVersionPrinter)();
+ exit(1);
+ }
+ }
}
};
+} // End anonymous namespace
-Help HelpOp("help", "display available options"
- " (-help-hidden for more)", false);
-Help HelpHiddenOpt("help-hidden", "display all available options", true);
-} // End anonymous namespace
+// Define the --version option that prints out the LLVM version for the tool
+static VersionPrinter VersionPrinterInstance;
+
+static cl::opt<VersionPrinter, true, parser<bool> >
+VersOp("version", cl::desc("Display the version of this program"),
+ cl::location(VersionPrinterInstance), cl::ValueDisallowed);
+
+// Utility function for printing the help message.
+void cl::PrintHelpMessage() {
+ // This looks weird, but it actually prints the help message. The
+ // NormalPrinter variable is a HelpPrinter and the help gets printed when
+ // its operator= is invoked. That's because the "normal" usages of the
+ // help printer is to be assigned true/false depending on whether the
+ // --help option was given or not. Since we're circumventing that we have
+ // to make it look like --help was given, so we assign true.
+ NormalPrinter = true;
+}
+
+/// Utility function for printing version number.
+void cl::PrintVersionMessage() {
+ VersionPrinterInstance.print();
+}
+
+void cl::SetVersionPrinter(void (*func)()) {
+ OverrideVersionPrinter = func;
+}
projects / oota-llvm.git / blobdiff