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Support/CommandLine: Fix LookupNearestOption to also search extra option names.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124124 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2011-01-24 17:27:17 +00:00
parent ccea167db5
commit c98d82a7f0
1 changed files with 25 additions and 10 deletions
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35
lib/Support/CommandLine.cpp
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@ -185,7 +185,8 @@ static Option *LookupOption(StringRef &Arg, StringRef &Value,
/// (after an equal sign) return that as well. This assumes that leading dashes
/// have already been stripped.
static Option *LookupNearestOption(StringRef Arg,
const StringMap<Option*> &OptionsMap) {
const StringMap<Option*> &OptionsMap,
const char *&NearestString) {
// Reject all dashes.
if (Arg.empty()) return 0;
@ -197,11 +198,21 @@ static Option *LookupNearestOption(StringRef Arg,
unsigned BestDistance = 0;
for (StringMap<Option*>::const_iterator it = OptionsMap.begin(),
ie = OptionsMap.end(); it != ie; ++it) {
unsigned Distance = StringRef(it->second->ArgStr).edit_distance(
Arg, /*AllowReplacements=*/true, /*MaxEditDistance=*/BestDistance);
if (!Best || Distance < BestDistance) {
Best = it->second;
BestDistance = Distance;
Option *O = it->second;
SmallVector<const char*, 16> OptionNames;
O->getExtraOptionNames(OptionNames);
if (O->ArgStr[0])
OptionNames.push_back(O->ArgStr);
for (size_t i = 0, e = OptionNames.size(); i != e; ++i) {
StringRef Name = OptionNames[i];
unsigned Distance = StringRef(Name).edit_distance(
Arg, /*AllowReplacements=*/true, /*MaxEditDistance=*/BestDistance);
if (!Best || Distance < BestDistance) {
Best = O;
NearestString = OptionNames[i];
BestDistance = Distance;
}
}
}
@ -600,6 +611,7 @@ void cl::ParseCommandLineOptions(int argc, char **argv,
for (int i = 1; i < argc; ++i) {
Option *Handler = 0;
Option *NearestHandler = 0;
const char *NearestHandlerString = 0;
StringRef Value;
StringRef ArgName = "";
@ -677,7 +689,8 @@ void cl::ParseCommandLineOptions(int argc, char **argv,
// Otherwise, look for the closest available option to report to the user
// in the upcoming error.
if (Handler == 0 && SinkOpts.empty())
NearestHandler = LookupNearestOption(ArgName, Opts);
NearestHandler = LookupNearestOption(ArgName, Opts,
NearestHandlerString);
}
if (Handler == 0) {
@ -685,9 +698,11 @@ void cl::ParseCommandLineOptions(int argc, char **argv,
errs() << ProgramName << ": Unknown command line argument '"
<< argv[i] << "'. Try: '" << argv[0] << " -help'\n";
// If we know a near match, report it as well.
errs() << ProgramName << ": Did you mean '-"
<< NearestHandler->ArgStr << "'?\n";
if (NearestHandler) {
// If we know a near match, report it as well.
errs() << ProgramName << ": Did you mean '-"
<< NearestHandlerString << "'?\n";
}
ErrorParsing = true;
} else {