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Add support for removing an option from a genericparser

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llvm-svn: 2998
This commit is contained in:
Chris Lattner 2002-07-23 17:15:09 +00:00
parent 5c25ebd6f2
commit 64ea4b3a11
1 changed files with 16 additions and 1 deletions
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17
include/Support/CommandLine.h
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@ -372,6 +372,11 @@ struct generic_parser_base {
return ValueDisallowed;
}
// findOption - Return the option number corresponding to the specified
// argument string. If the option is not found, getNumOptions() is returned.
//
unsigned findOption(const char *Name);
protected:
bool hasArgStr;
};
@ -384,8 +389,10 @@ protected:
//
template <class DataType>
class parser : public generic_parser_base {
protected:
std::vector<std::pair<const char *,
std::pair<DataType, const char *> > > Values;
public:
// Implement virtual functions needed by generic_parser_base
unsigned getNumOptions() const { return Values.size(); }
@ -394,7 +401,6 @@ class parser : public generic_parser_base {
return Values[N].second.second;
}
public:
// Default implementation, requires user to populate it with values somehow.
template<class Opt> // parse - Return true on error.
bool parse(Opt &O, const char *ArgName, const string &Arg) {
@ -416,8 +422,17 @@ public:
// addLiteralOption - Add an entry to the mapping table...
template <class DT>
void addLiteralOption(const char *Name, const DT &V, const char *HelpStr) {
assert(findOption(Name) == Values.size() && "Option already exists!");
Values.push_back(std::make_pair(Name, std::make_pair((DataType)V,HelpStr)));
}
// removeLiteralOption - Remove the specified option.
//
void removeLiteralOption(const char *Name) {
unsigned N = findOption(Name);
assert(N != Values.size() && "Option not found!");
Values.erase(Values.begin()+N);
}
};