cmdopt: print type argument type information
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parent
76179f264b
commit
90386f63fe
49
cmdopt.cpp
49
cmdopt.cpp
@ -149,6 +149,15 @@ null::execute (const char *restrict)
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}
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}
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//-----------------------------------------------------------------------------
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const std::string&
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null::example (void) const
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{
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static const std::string EXAMPLE;
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return EXAMPLE;
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}
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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present::present (std::string _name, std::string _description, bool &_data):
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present::present (std::string _name, std::string _description, bool &_data):
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base (std::move (_name), std::move (_description)),
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base (std::move (_name), std::move (_description)),
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@ -164,6 +173,15 @@ present::execute (void)
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}
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}
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//-----------------------------------------------------------------------------
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const std::string&
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present::example (void) const
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{
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static const std::string EXAMPLE;
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return EXAMPLE;
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}
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//-----------------------------------------------------------------------------
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//-----------------------------------------------------------------------------
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void
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void
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present::finish (void)
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present::finish (void)
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@ -443,12 +461,28 @@ parser::print_help (const int argc,
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exit (0);
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exit (0);
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// find the longest long form argument so we can set field alignment
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// find the longest long form argument so we can set field alignment
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auto largest = std::max_element (m_long.begin (),
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auto largestwidth = std::max_element (
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m_long.end (),
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m_long.begin (),
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[] (const auto &a, const auto &b) {
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m_long.end (),
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return std::get<0> (a).size () < std::get<0> (b).size ();
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[] (const auto &a, const auto &b)
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{
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return std::get<std::string> (a).size () < std::get<std::string> (b).size ();
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});
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});
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int longwidth = std::get<0> (*largest).size ();
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int longwidth = std::get<std::string> (*largestwidth).size ();
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// find the longest example text
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auto largestexample = std::max_element (
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m_options.cbegin (),
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m_options.cend (),
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[] (const auto &a, const auto &b)
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{
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const auto &example_a = std::get<std::unique_ptr<option::base>> (a)->example ();
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const auto &example_b = std::get<std::unique_ptr<option::base>> (b)->example ();
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return example_a.size () > example_b.size ();
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});
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int longexample = std::get<std::unique_ptr<option::base>> (*largestexample)->example ().size ();
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// field width requires an alignment. we don't care about preserving
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// field width requires an alignment. we don't care about preserving
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// state as we're about to bail anyway
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// state as we're about to bail anyway
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@ -459,8 +493,9 @@ parser::print_help (const int argc,
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for (auto &o: m_options) {
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for (auto &o: m_options) {
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std::cout << '\t'
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std::cout << '\t'
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<< '-' << std::get<0> (o) << '\t'
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<< '-' << std::get<char> (o) << '\t'
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<< std::setw (longwidth) << std::get<1> (o) << '\t'
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<< std::setw (longwidth) << std::get<std::string> (o) << '\t'
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<< std::setw (longexample) << std::get<std::unique_ptr<option::base>> (o)->example () << '\t'
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<< std::setw (0) << std::get<2> (o)->description ()
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<< std::setw (0) << std::get<2> (o)->description ()
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<< '\n';
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<< '\n';
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}
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}
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@ -38,6 +38,8 @@ namespace util { namespace cmdopt {
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virtual void start (void);
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virtual void start (void);
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virtual void finish (void);
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virtual void finish (void);
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virtual const std::string& example (void) const = 0;
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const std::string& name (void) const;
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const std::string& name (void) const;
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const std::string& description (void) const;
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const std::string& description (void) const;
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@ -62,6 +64,8 @@ namespace util { namespace cmdopt {
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virtual void execute (void) override;
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virtual void execute (void) override;
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virtual void execute (const char *restrict) override;
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virtual void execute (const char *restrict) override;
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virtual const std::string& example (void) const override;
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};
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};
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@ -72,6 +76,8 @@ namespace util { namespace cmdopt {
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using base::execute;
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using base::execute;
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virtual void execute (void) override;
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virtual void execute (void) override;
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virtual const std::string& example (void) const override;
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virtual void finish (void) override;
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virtual void finish (void) override;
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private:
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private:
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@ -87,6 +93,8 @@ namespace util { namespace cmdopt {
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using base::execute;
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using base::execute;
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void execute (const char *restrict) override;
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void execute (const char *restrict) override;
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const std::string& example (void) const override;
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T data (void) const;
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T data (void) const;
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T& data (void);
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T& data (void);
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T& data (T);
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T& data (T);
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42
cmdopt.ipp
42
cmdopt.ipp
@ -21,6 +21,9 @@
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#include <sstream>
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#include <sstream>
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#include "./introspection.hpp"
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#include "./iterator.hpp"
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namespace util { namespace cmdopt {
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namespace util { namespace cmdopt {
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///////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////
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template <typename T>
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template <typename T>
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@ -53,6 +56,45 @@ namespace util { namespace cmdopt {
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}
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}
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//-------------------------------------------------------------------------
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namespace detail {
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template <typename T>
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std::enable_if_t<!std::is_enum<T>::value, const std::string&>
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value_example (void)
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{
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static const std::string EXAMPLE =
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std::string {"<"} +
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std::string {to_string<T> ()} +
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std::string {">"};
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return EXAMPLE;
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}
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template <typename T>
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std::enable_if_t<std::is_enum<T>::value, const std::string&>
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value_example (void)
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{
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static const std::string EXAMPLE = [] (void) {
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std::ostringstream os;
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std::copy (std::cbegin (enum_values<T>::values),
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std::cend (enum_values<T>::values),
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infix_iterator<T> (os, "|"));
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return os.str ();
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} ();
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return EXAMPLE;
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}
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}
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//-------------------------------------------------------------------------
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template <typename T>
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const std::string&
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option::value<T>::example (void) const
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{
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return detail::value_example<T> ();
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}
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//-----------------------------------------------------------------------------
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//-----------------------------------------------------------------------------
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template <typename T>
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template <typename T>
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T
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T
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