76e73866e5
Only implemented flag is OptionsOnlyAtStart which considers options given after the first positional parameter as a positional one
100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
#include "parameters_parser.hh"
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namespace Kakoune
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{
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ParametersParser::ParametersParser(const ParameterList& params,
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std::unordered_map<String, bool> options,
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Flags flags,
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size_t min_positionals,
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size_t max_positionals)
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: m_params(params),
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m_options(std::move(options))
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{
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bool only_pos = false;
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for (size_t i = 0; i < params.size(); ++i)
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{
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if (params[i] == "--")
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only_pos = true;
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else if (not only_pos and params[i][0] == '-')
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{
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auto it = m_options.find(params[i].substr(1_byte));
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if (it == m_options.end())
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throw unknown_option(params[i]);
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if (it->second)
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{
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++i;
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if (i == params.size() or params[i][0] == '-')
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throw missing_option_value(params[i]);
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}
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}
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else
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{
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if (flags & Flags::OptionsOnlyAtStart)
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only_pos = true;
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m_positional_indices.push_back(i);
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}
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}
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size_t count = m_positional_indices.size();
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if (count > max_positionals or count < min_positionals)
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throw wrong_argument_count();
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}
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bool ParametersParser::has_option(const String& name) const
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{
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assert(m_options.find(name) != m_options.end());
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for (auto& param : m_params)
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{
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if (param[0] == '-' and param.substr(1_byte) == name)
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return true;
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if (param == "--")
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break;
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}
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return false;
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}
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const String& ParametersParser::option_value(const String& name) const
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{
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#ifdef KAK_DEBUG
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auto it = m_options.find(name);
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assert(it != m_options.end());
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assert(it->second == true);
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#endif
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for (size_t i = 0; i < m_params.size(); ++i)
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{
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if (m_params[i][0] == '-' and m_params[i].substr(1_byte) == name)
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return m_params[i+1];
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if (m_params[i] == "--")
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break;
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}
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static String empty;
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return empty;
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}
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size_t ParametersParser::positional_count() const
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{
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return m_positional_indices.size();
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}
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const String& ParametersParser::operator[] (size_t index) const
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{
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assert(index < positional_count());
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return m_params[m_positional_indices[index]];
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}
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ParametersParser::iterator ParametersParser::begin() const
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{
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return iterator(*this, 0);
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}
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ParametersParser::iterator ParametersParser::end() const
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{
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return iterator(*this, m_positional_indices.size());
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}
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}
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