Merge branch 'default_implicit'

This commit is contained in:
Jarryd Beck 2014-10-30 08:54:03 +11:00
commit fdf49ba719
2 changed files with 178 additions and 41 deletions

View File

@ -214,15 +214,36 @@ namespace cxxopts
namespace cxxopts
{
class Value
class Value : public std::enable_shared_from_this<Value>
{
public:
virtual void
parse(const std::string& text) const = 0;
virtual void
parse() const = 0;
virtual bool
has_arg() const = 0;
virtual bool
has_default() const = 0;
virtual bool
has_implicit() const = 0;
virtual std::string
get_default_value() const = 0;
virtual std::string
get_implicit_value() const = 0;
virtual std::shared_ptr<Value>
default_value(const std::string& value) = 0;
virtual std::shared_ptr<Value>
implicit_value(const std::string& value) = 0;
};
class OptionException : public std::exception
@ -375,7 +396,7 @@ namespace cxxopts
inline
void
parse_value(const std::string& text, bool& value)
parse_value(const std::string& /*text*/, bool& value)
{
//TODO recognise on, off, yes, no, enable, disable
//so that we can write --long=yes explicitly
@ -395,16 +416,16 @@ namespace cxxopts
};
template <typename T>
class default_value : public Value
class standard_value : public Value
{
public:
default_value()
standard_value()
: m_result(std::make_shared<T>())
, m_store(m_result.get())
{
}
default_value(T* t)
standard_value(T* t)
: m_store(t)
{
}
@ -412,7 +433,20 @@ namespace cxxopts
void
parse(const std::string& text) const
{
parse_value(text, *m_store);
if (m_implicit && text.empty())
{
parse_value(m_implicit_value, *m_store);
}
else
{
parse_value(text, *m_store);
}
}
void
parse() const
{
parse_value(m_default_value, *m_store);
}
bool
@ -421,6 +455,44 @@ namespace cxxopts
return value_has_arg<T>::value;
}
bool
has_default() const
{
return m_default;
}
bool
has_implicit() const
{
return m_implicit;
}
virtual std::shared_ptr<Value>
default_value(const std::string& value){
m_default = true;
m_default_value = value;
return shared_from_this();
}
virtual std::shared_ptr<Value>
implicit_value(const std::string& value){
m_implicit = true;
m_implicit_value = value;
return shared_from_this();
}
std::string
get_default_value() const
{
return m_default_value;
}
std::string
get_implicit_value() const
{
return m_implicit_value;
}
const T&
get() const
{
@ -434,25 +506,28 @@ namespace cxxopts
}
}
private:
protected:
std::shared_ptr<T> m_result;
T* m_store;
bool m_default = false;
std::string m_default_value;
bool m_implicit = false;
std::string m_implicit_value;
};
}
template <typename T>
std::shared_ptr<Value>
value()
{
return std::make_shared<values::default_value<T>>();
return std::make_shared<values::standard_value<T>>();
}
template <typename T>
std::shared_ptr<Value>
value(T& t)
{
return std::make_shared<values::default_value<T>>(&t);
return std::make_shared<values::standard_value<T>>(&t);
}
class OptionAdder;
@ -490,17 +565,28 @@ namespace cxxopts
++m_count;
}
void
parse_default()
{
m_value->parse();
++m_count;
}
int
count() const
{
return m_count;
}
const Value& value() const {
return *m_value;
}
template <typename T>
const T&
as() const
{
return dynamic_cast<const values::default_value<T>&>(*m_value).get();
return dynamic_cast<const values::standard_value<T>&>(*m_value).get();
}
private:
@ -515,6 +601,10 @@ namespace cxxopts
std::string l;
String desc;
bool has_arg;
bool has_default;
std::string default_value;
bool has_implicit;
std::string implicit_value;
std::string arg_help;
};
@ -622,7 +712,7 @@ namespace cxxopts
(
int argc,
char* argv[],
int argPos,
int& current,
std::shared_ptr<OptionDetails> value,
const std::string& name
);
@ -686,12 +776,12 @@ namespace cxxopts
String
format_option
(
const std::string& s,
const std::string& l,
bool has_arg,
const std::string& arg_help
const HelpOptionDetails& o
)
{
auto& s = o.s;
auto& l = o.l;
String result = " ";
if (s.size() > 0)
@ -708,15 +798,17 @@ namespace cxxopts
result += " --" + toLocalString(l);
}
if (has_arg)
if (o.has_arg)
{
if (arg_help.size() != 0)
auto arg = o.arg_help.size() > 0 ? toLocalString(o.arg_help) : "arg";
if (o.has_implicit)
{
result += " " + toLocalString(arg_help);
result += " [=" + arg + "(=" + toLocalString(o.implicit_value) + ")]";
}
else
{
result += " arg";
result += " " + arg;
}
}
@ -726,20 +818,27 @@ namespace cxxopts
String
format_description
(
const String& text,
const HelpOptionDetails& o,
int start,
int width
)
{
auto desc = o.desc;
if (o.has_default)
{
desc += toLocalString(" (default:" + o.default_value + ")");
}
String result;
auto current = std::begin(text);
auto current = std::begin(desc);
auto startLine = current;
auto lastSpace = current;
int size = 0;
while (current != std::end(text))
while (current != std::end(desc))
{
if (*current == ' ')
{
@ -816,7 +915,7 @@ void
Options::parse_option
(
std::shared_ptr<OptionDetails> value,
const std::string& name,
const std::string& /*name*/,
const std::string& arg
)
{
@ -828,17 +927,34 @@ Options::checked_parse_arg
(
int argc,
char* argv[],
int argPos,
int& current,
std::shared_ptr<OptionDetails> value,
const std::string& name
)
{
if (argPos >= argc)
if (current + 1 >= argc)
{
throw missing_argument_exception(name);
if (value->value().has_implicit())
{
parse_option(value, name, "");
}
else
{
throw missing_argument_exception(name);
}
}
else
{
if (argv[current + 1][0] == '-' && value->value().has_implicit())
{
parse_option(value, name, "");
}
else
{
parse_option(value, name, argv[current + 1]);
++current;
}
}
parse_option(value, name, argv[argPos]);
}
void
@ -909,7 +1025,7 @@ Options::parse(int& argc, char**& argv)
{
const std::string& s = result[4];
for (int i = 0; i != s.size(); ++i)
for (std::size_t i = 0; i != s.size(); ++i)
{
std::string name(1, s[i]);
auto iter = m_options.find(name);
@ -931,8 +1047,11 @@ Options::parse(int& argc, char**& argv)
//it must be the last argument
if (i + 1 == s.size())
{
checked_parse_arg(argc, argv, current+1, value, name);
++current;
checked_parse_arg(argc, argv, current, value, name);
}
else if (value->value().has_implicit())
{
parse_option(value, name, "");
}
else
{
@ -973,9 +1092,7 @@ Options::parse(int& argc, char**& argv)
if (opt->has_arg())
{
//parse the next argument
checked_parse_arg(argc, argv, current + 1, opt, name);
++current;
checked_parse_arg(argc, argv, current, opt, name);
}
else
{
@ -990,6 +1107,16 @@ Options::parse(int& argc, char**& argv)
++current;
}
for (auto& opt : m_options)
{
auto& detail = opt.second;
auto& value = detail->value();
if(!detail->count() && value.has_default()){
detail->parse_default();
}
}
argc = nextKeep;
}
@ -1019,10 +1146,12 @@ Options::add_option
//add the help details
auto& options = m_help[group];
options.options.
emplace_back(HelpOptionDetails{s, l, stringDesc, value->has_arg(),
std::move(arg_help)}
);
options.options.emplace_back(HelpOptionDetails{s, l, stringDesc,
value->has_arg(),
value->has_default(), value->get_default_value(),
value->has_implicit(), value->get_implicit_value(),
std::move(arg_help)});
}
void
@ -1064,7 +1193,7 @@ Options::help_one_group(const std::string& g) const
for (const auto& o : group->second.options)
{
auto s = format_option(o.s, o.l, o.has_arg, o.arg_help);
auto s = format_option(o);
longest = std::max(longest, stringLength(s));
format.push_back(std::make_pair(s, String()));
}
@ -1077,7 +1206,7 @@ Options::help_one_group(const std::string& g) const
auto fiter = format.begin();
for (const auto& o : group->second.options)
{
auto d = format_description(o.desc, longest + OPTION_DESC_GAP, allowed);
auto d = format_description(o, longest + OPTION_DESC_GAP, allowed);
result += fiter->first;
if (stringLength(fiter->first) > longest)

View File

@ -38,6 +38,8 @@ int main(int argc, char* argv[])
("a,apple", "an apple", cxxopts::value<bool>(apple))
("b,bob", "Bob")
("f,file", "File", cxxopts::value<std::vector<std::string>>(), "FILE")
("o,output", "Output file", cxxopts::value<std::string>()
->default_value("a.out")->implicit_value("b.def"), "BIN")
("positional",
"Positional arguments: these are the arguments that are entered "
"without an option", cxxopts::value<std::string>())
@ -92,6 +94,12 @@ int main(int argc, char* argv[])
<< std::endl;
}
if (options.count("output"))
{
std::cout << "Output = " << options["output"].as<std::string>()
<< std::endl;
}
if (options.count("int"))
{
std::cout << "int = " << options["int"].as<int>() << std::endl;