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// Copyright Vladimir Prus 2002-2004.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt
// or copy at http://www.boost.org/LICENSE_1_0.txt)
#define BOOST_PROGRAM_OPTIONS_SOURCE
#include <boost/program_options/config.hpp>
#include <boost/program_options/parsers.hpp>
#include <boost/program_options/options_description.hpp>
#include <boost/program_options/value_semantic.hpp>
#include <boost/program_options/variables_map.hpp>
#include <cassert>
namespace boost { namespace program_options {
using namespace std;
// First, performs semantic actions for 'oa'.
// Then, stores in 'm' all options that are defined in 'desc'.
BOOST_PROGRAM_OPTIONS_DECL
void store(const parsed_options& options, variables_map& xm,
bool utf8)
{
// TODO: what if we have different definition
// for the same option name during different calls
// 'store'.
assert(options.description);
const options_description& desc = *options.description;
// We need to access map's operator[], not the overriden version
// variables_map. Ehmm.. messy.
std::map<std::string, variable_value>& m = xm;
std::set<std::string> new_final;
// Declared once, to please Intel in VC++ mode;
unsigned i;
// Declared here so can be used to provide context for exceptions
string option_name;
string original_token;
#ifndef BOOST_NO_EXCEPTIONS
try
#endif
{
// First, convert/store all given options
for (i = 0; i < options.options.size(); ++i) {
option_name = options.options[i].string_key;
// Skip positional options without name
if (option_name.empty())
continue;
// Ignore unregistered option. The 'unregistered'
// field can be true only if user has explicitly asked
// to allow unregistered options. We can't store them
// to variables map (lacking any information about paring),
// so just ignore them.
if (options.options[i].unregistered)
continue;
// If option has final value, skip this assignment
if (xm.m_final.count(option_name))
continue;
original_token = options.options[i].original_tokens.size() ?
options.options[i].original_tokens[0] : "";
const option_description& d = desc.find(option_name, false,
false, false);
variable_value& v = m[option_name];
if (v.defaulted()) {
// Explicit assignment here erases defaulted value
v = variable_value();
}
d.semantic()->parse(v.value(), options.options[i].value, utf8);
v.m_value_semantic = d.semantic();
// The option is not composing, and the value is explicitly
// provided. Ignore values of this option for subsequent
// calls to 'store'. We store this to a temporary set,
// so that several assignment inside *this* 'store' call
// are allowed.
if (!d.semantic()->is_composing())
new_final.insert(option_name);
}
}
#ifndef BOOST_NO_EXCEPTIONS
catch(error_with_option_name& e)
{
// add context and rethrow
e.add_context(option_name, original_token, options.m_options_prefix);
throw;
}
#endif
xm.m_final.insert(new_final.begin(), new_final.end());
// Second, apply default values and store required options.
const vector<shared_ptr<option_description> >& all = desc.options();
for(i = 0; i < all.size(); ++i)
{
const option_description& d = *all[i];
string key = d.key("");
// FIXME: this logic relies on knowledge of option_description
// internals.
// The 'key' is empty if options description contains '*'.
// In that
// case, default value makes no sense at all.
if (key.empty())
{
continue;
}
if (m.count(key) == 0) {
boost::any def;
if (d.semantic()->apply_default(def)) {
m[key] = variable_value(def, true);
m[key].m_value_semantic = d.semantic();
}
}
// add empty value if this is an required option
if (d.semantic()->is_required()) {
// For option names specified in multiple ways, e.g. on the command line,
// config file etc, the following precedence rules apply:
// "--" > ("-" or "/") > ""
// Precedence is set conveniently by a single call to length()
string canonical_name = d.canonical_display_name(options.m_options_prefix);
if (canonical_name.length() > xm.m_required[key].length())
xm.m_required[key] = canonical_name;
}
}
}
BOOST_PROGRAM_OPTIONS_DECL
void store(const wparsed_options& options, variables_map& m)
{
store(options.utf8_encoded_options, m, true);
}
BOOST_PROGRAM_OPTIONS_DECL
void notify(variables_map& vm)
{
vm.notify();
}
abstract_variables_map::abstract_variables_map()
: m_next(0)
{}
abstract_variables_map::
abstract_variables_map(const abstract_variables_map* next)
: m_next(next)
{}
const variable_value&
abstract_variables_map::operator[](const std::string& name) const
{
const variable_value& v = get(name);
if (v.empty() && m_next)
return (*m_next)[name];
else if (v.defaulted() && m_next) {
const variable_value& v2 = (*m_next)[name];
if (!v2.empty() && !v2.defaulted())
return v2;
else return v;
} else {
return v;
}
}
void
abstract_variables_map::next(abstract_variables_map* next)
{
m_next = next;
}
variables_map::variables_map()
{}
variables_map::variables_map(const abstract_variables_map* next)
: abstract_variables_map(next)
{}
void variables_map::clear()
{
std::map<std::string, variable_value>::clear();
m_final.clear();
m_required.clear();
}
const variable_value&
variables_map::get(const std::string& name) const
{
static variable_value empty;
const_iterator i = this->find(name);
if (i == this->end())
return empty;
else
return i->second;
}
void
variables_map::notify()
{
// This checks if all required options occur
for (map<string, string>::const_iterator r = m_required.begin();
r != m_required.end();
++r)
{
const string& opt = r->first;
const string& display_opt = r->second;
map<string, variable_value>::const_iterator iter = find(opt);
if (iter == end() || iter->second.empty())
{
boost::throw_exception(required_option(display_opt));
}
}
// Lastly, run notify actions.
for (map<string, variable_value>::iterator k = begin();
k != end();
++k)
{
/* Users might wish to use variables_map to store their own values
that are not parsed, and therefore will not have value_semantics
defined. Do not crash on such values. In multi-module programs,
one module might add custom values, and the 'notify' function
will be called after that, so we check that value_sematics is
not NULL. See:
https://svn.boost.org/trac/boost/ticket/2782
*/
if (k->second.m_value_semantic)
k->second.m_value_semantic->notify(k->second.value());
}
}
}}
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