std::vector<std::pair<const char *,
std::pair<DataType, const char *> > > Values;
public:
+ typedef DataType parser_data_type;
// Implement virtual functions needed by generic_parser_base
unsigned getNumOptions() const { return Values.size(); }
return Values[N].second.second;
}
- // 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) {
- string ArgVal;
+ // parse - Return true on error.
+ bool parse(Option &O, const char *ArgName, const std::string &Arg,
+ DataType &V) {
+ std::string ArgVal;
if (hasArgStr)
ArgVal = Arg;
else
for (unsigned i = 0, e = Values.size(); i != e; ++i)
if (ArgVal == Values[i].first) {
- O.addValue(Values[i].second.first);
+ V = Values[i].second.first;
return false;
}
}
};
-
//--------------------------------------------------
-// parser<bool>
+// basic_parser - Super class of parsers to provide boilerplate code
//
-template<>
-class parser<bool> {
- static bool parseImpl(Option &O, const string &Arg, bool &Val);
-public:
-
- template<class Opt> // parse - Return true on error.
- bool parse(Opt &O, const char *ArgName, const string &Arg) {
- bool Val;
- bool Error = parseImpl(O, Arg, Val);
- if (!Error) O.addValue(Val);
- return Error;
- }
+struct basic_parser_impl { // non-template implementation of basic_parser<t>
+ virtual ~basic_parser_impl() {}
enum ValueExpected getValueExpectedFlagDefault() const {
- return ValueOptional;
+ return ValueRequired;
}
-
+
void initialize(Option &O) {}
-
+
// Return the width of the option tag for printing...
- virtual unsigned getOptionWidth(const Option &O) const;
-
- // printOptionInfo - Print out information about this option. The
+ unsigned getOptionWidth(const Option &O) const;
+
+ // printOptionInfo - Print out information about this option. The
// to-be-maintained width is specified.
//
- virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
+ void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
+
+
+ // getValueName - Overload in subclass to provide a better default value.
+ virtual const char *getValueName() const { return "value"; }
+};
+
+// basic_parser - The real basic parser is just a template wrapper that provides
+// a typedef for the provided data type.
+//
+template<class DataType>
+struct basic_parser : public basic_parser_impl {
+ typedef DataType parser_data_type;
};
//--------------------------------------------------
-// parser<int>
+// parser<bool>
//
template<>
-class parser<int> {
- static bool parseImpl(Option &O, const string &Arg, int &Val);
-public:
-
+struct parser<bool> : public basic_parser<bool> {
+
// parse - Return true on error.
- template<class Opt>
- bool parse(Opt &O, const char *ArgName, const string &Arg) {
- int Val;
- bool Error = parseImpl(O, Arg, Val);
- if (!Error) O.addValue(Val);
- return Error;
- }
+ bool parse(Option &O, const char *ArgName, const std::string &Arg, bool &Val);
enum ValueExpected getValueExpectedFlagDefault() const {
- return ValueRequired;
+ return ValueOptional;
}
- void initialize(Option &O) {}
-
- // Return the width of the option tag for printing...
- virtual unsigned getOptionWidth(const Option &O) const;
-
- // printOptionInfo - Print out information about this option. The
- // to-be-maintained width is specified.
- //
- virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
+ // getValueName - Do not print =<value> at all
+ virtual const char *getValueName() const { return 0; }
};
//--------------------------------------------------
-// parser<double>
+// parser<int>
//
template<>
-class parser<double> {
- static bool parseImpl(Option &O, const string &Arg, double &Val);
-public:
+struct parser<int> : public basic_parser<int> {
// parse - Return true on error.
- template<class Opt>
- bool parse(Opt &O, const char *ArgName, const string &Arg) {
- double Val;
- bool Error = parseImpl(O, Arg, Val);
- if (!Error) O.addValue(Val);
- return Error;
- }
+ bool parse(Option &O, const char *ArgName, const std::string &Arg, int &Val);
- enum ValueExpected getValueExpectedFlagDefault() const {
- return ValueRequired;
- }
+ // getValueName - Overload in subclass to provide a better default value.
+ virtual const char *getValueName() const { return "int"; }
+};
- void initialize(Option &O) {}
- // Return the width of the option tag for printing...
- virtual unsigned getOptionWidth(const Option &O) const;
+//--------------------------------------------------
+// parser<double>
+//
+template<>
+struct parser<double> : public basic_parser<double> {
+ // parse - Return true on error.
+ bool parse(Option &O, const char *AN, const std::string &Arg, double &Val);
- // printOptionInfo - Print out information about this option. The
- // to-be-maintained width is specified.
- //
- virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
+ // getValueName - Overload in subclass to provide a better default value.
+ virtual const char *getValueName() const { return "number"; }
};
-// Parser<float> is the same as parser<double>
-template<> struct parser<float> : public parser<double> {};
+//--------------------------------------------------
+// parser<float>
+//
+template<>
+struct parser<float> : public basic_parser<float> {
+ // parse - Return true on error.
+ bool parse(Option &O, const char *AN, const std::string &Arg, float &Val);
+
+ // getValueName - Overload in subclass to provide a better default value.
+ virtual const char *getValueName() const { return "number"; }
+};
//--------------------------------------------------
-// parser<string>
+// parser<std::string>
//
template<>
-struct parser<string> {
+struct parser<std::string> : public basic_parser<std::string> {
// parse - Return true on error.
- template<class Opt>
- bool parse(Opt &O, const char *ArgName, const string &Arg) {
- O.addValue(Arg);
+ bool parse(Option &O, const char *ArgName, const std::string &Arg,
+ std::string &Value) {
+ Value = Arg;
return false;
}
- enum ValueExpected getValueExpectedFlagDefault() const {
- return ValueRequired;
- }
-
- void initialize(Option &O) {}
-
- // Return the width of the option tag for printing...
- virtual unsigned getOptionWidth(const Option &O) const;
- // printOptionInfo - Print out information about this option. The
- // to-be-maintained width is specified.
- //
- virtual void printOptionInfo(const Option &O, unsigned GlobalWidth) const;
+ // getValueName - Overload in subclass to provide a better default value.
+ virtual const char *getValueName() const { return "string"; }
};
template<class Opt>
static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
};
+template<unsigned n> struct applicator<const char[n]> {
+ template<class Opt>
+ static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
+};
template<> struct applicator<const char*> {
template<class Opt>
static void opt(const char *Str, Opt &O) { O.setArgStr(Str); }
class ParserClass = parser<DataType> >
class opt : public Option,
public opt_storage<DataType, ExternalStorage,
- ::boost::is_class<DataType>::value>{
+ ::boost::is_class<DataType>::value> {
ParserClass Parser;
virtual bool handleOccurance(const char *ArgName, const std::string &Arg) {
- return Parser.parse(*this, ArgName, Arg);
+ typename ParserClass::parser_data_type Val;
+ if (Parser.parse(*this, ArgName, Arg, Val))
+ return true; // Parse error!
+ setValue(Val);
+ return false;
}
virtual enum ValueExpected getValueExpectedFlagDefault() const {
// setInitialValue - Used by the cl::init modifier...
void setInitialValue(const DataType &V) { setValue(V); }
- // addValue - Used by the parser to add a value to the option
- template<class T>
- void addValue(const T &V) { setValue(V); }
ParserClass &getParser() { return Parser; }
operator DataType() const { return getValue(); }
}
virtual bool handleOccurance(const char *ArgName, const std::string &Arg) {
- return Parser.parse(*this, ArgName, Arg);
+ typename ParserClass::parser_data_type Val;
+ if (Parser.parse(*this, ArgName, Arg, Val))
+ return true; // Parse Error!
+ addValue(Val);
+ return false;
}
// Forward printing stuff to the parser...
projects / oota-llvm.git / blobdiff