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common: implement dynamic option dependencies mechanism

This commit is contained in:
whythat 2018-01-22 03:48:09 +02:00
parent 05a12ccc2d
commit c5f55bb4c0
1 changed files with 11 additions and 14 deletions
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25
src/common/command_line.h
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@ -30,7 +30,9 @@
#pragma once #pragma once
#include <functional>
#include <iostream> #include <iostream>
#include <sstream>
#include <type_traits> #include <type_traits>
#include <boost/program_options/parsers.hpp> #include <boost/program_options/parsers.hpp>
@ -88,10 +90,10 @@ namespace command_line
const char* name; const char* name;
const char* description; const char* description;
const arg_descriptor<bool, false>& ref; T default_value;
T true_default_value; const arg_descriptor<bool, false>& ref;
T false_default_value; std::function<T(bool, bool, T)> depf;
bool not_use_default; bool not_use_default;
}; };
@ -116,14 +118,11 @@ namespace command_line
{ {
auto semantic = boost::program_options::value<T>(); auto semantic = boost::program_options::value<T>();
if (!arg.not_use_default) { if (!arg.not_use_default) {
if (arg.ref.default_value) std::ostringstream format;
{ format << arg.depf(false, true, arg.default_value) << ", "
semantic->default_value(arg.true_default_value); << arg.depf(true, true, arg.default_value) << " if '"
} << arg.ref.name << "'";
else semantic->default_value(arg.depf(arg.ref.default_value, true, arg.default_value), format.str());
{
semantic->default_value(arg.false_default_value);
}
} }
return semantic; return semantic;
} }
@ -231,9 +230,7 @@ namespace command_line
template<typename T, bool required> template<typename T, bool required>
T get_arg(const boost::program_options::variables_map& vm, const arg_descriptor<T, required, true>& arg) T get_arg(const boost::program_options::variables_map& vm, const arg_descriptor<T, required, true>& arg)
{ {
if (is_arg_defaulted(vm, arg) && !is_arg_defaulted(vm, arg.ref)) return arg.depf(get_arg(vm, arg.ref), is_arg_defaulted(vm, arg), vm[arg.name].template as<T>());
return get_arg(vm, arg.ref) ? arg.true_default_value : arg.false_default_value;
return vm[arg.name].template as<T>();
} }
template<typename T, bool required> template<typename T, bool required>