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[Option] Support MultiArg in --help

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Currently, if you use a MultiArg<> option, then printing out the help/usage
message will cause an assert.  This fixes getOptionHelpName() to work with
MultiArg Options.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215770 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Kledzik 2014-08-15 21:35:07 +00:00
parent 0549fc2448
commit 4a8a0f2132
1 changed files with 12 additions and 1 deletions
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13
lib/Option/OptTable.cpp
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@ -300,7 +300,18 @@ static std::string getOptionHelpName(const OptTable &Opts, OptSpecifier Id) {
llvm_unreachable("Invalid option with help text.");
case Option::MultiArgClass:
llvm_unreachable("Cannot print metavar for this kind of option.");
if (const char *MetaVarName = Opts.getOptionMetaVar(Id)) {
// For MultiArgs, metavar is full list of all argument names.
Name += ' ';
Name += MetaVarName;
}
else {
// For MultiArgs<N>, if metavar not supplied, print <value> N times.
for (unsigned i=0, e=O.getNumArgs(); i< e; ++i) {
Name += " <value>";
}
}
break;
case Option::FlagClass:
break;