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*Implement/Document the cl::extrahelp feature instead of the MoreHelp ptr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17871 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2004-11-16 06:11:52 +00:00
parent eea9b134fc
commit 9bbba09139
3 changed files with 67 additions and 12 deletions
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29
lib/Support/CommandLine.cpp
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@ -838,7 +838,15 @@ void generic_parser_base::printOptionInfo(const Option &O,
// If this variable is set, it is a pointer to a function that the user wants
// us to call after we print out the help info. Basically a hook to allow
// additional help to be printed.
void (*cl::MoreHelp)() = 0;
static std::vector<const char*>* MoreHelp = 0;
extrahelp::extrahelp(const char* Help)
: morehelp(Help) {
if (!MoreHelp) {
MoreHelp = new std::vector<const char*>;
}
MoreHelp->push_back(Help);
}
namespace {
@ -913,11 +921,16 @@ public:
for (unsigned i = 0, e = Options.size(); i != e; ++i)
Options[i].second->printOptionInfo(MaxArgLen);
// Call the user's hook so help output can be extended.
if (MoreHelp != 0)
(*MoreHelp)();
// Print any extra help the user has declared. If MoreHelp is not null,
// then the user used at least one cl::extrahelp instance to provide
// additional help. We just print it out now.
if (MoreHelp != 0) {
for (std::vector<const char *>::iterator I = MoreHelp->begin(),
E = MoreHelp->end(); I != E; ++I)
std::cerr << *I;
}
// Halt the program if help information is printed
// Halt the program since help information was printed
exit(1);
}
};
@ -954,4 +967,10 @@ cl::opt<VersionPrinter, true, parser<bool> >
VersOp("version", cl::desc("display the version"),
cl::location(VersionPrinterInstance), cl::ValueDisallowed);
} // End anonymous namespace
// Utility function for printing the help message.
void cl::PrintHelpMessage() {
NormalPrinter = true;
}