66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
#include "parameters_parser.hh"
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namespace Kakoune
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{
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String generate_switches_doc(const SwitchMap& switches)
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{
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String res;
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for (auto& sw : switches)
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res += " -" + sw.key + (sw.value.takes_arg ? " <arg>: " : ": ") + sw.value.description + "\n";
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return res;
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}
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ParametersParser::ParametersParser(ParameterList params,
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const ParameterDesc& desc)
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: m_params(params),
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m_desc(desc)
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{
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bool only_pos = desc.flags & ParameterDesc::Flags::SwitchesAsPositional;
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for (size_t i = 0; i < params.size(); ++i)
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{
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if (not only_pos and params[i] == "--")
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only_pos = true;
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else if (not only_pos and params[i][0_byte] == '-')
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{
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auto it = m_desc.switches.find(params[i].substr(1_byte));
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if (it == m_desc.switches.end())
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throw unknown_option(params[i]);
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if (it->value.takes_arg)
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{
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++i;
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if (i == params.size() or params[i][0_byte] == '-')
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throw missing_option_value(it->key);
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}
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}
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else
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{
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if (desc.flags & ParameterDesc::Flags::SwitchesOnlyAtStart)
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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 > desc.max_positionals or count < desc.min_positionals)
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throw wrong_argument_count();
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}
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Optional<StringView> ParametersParser::get_switch(StringView name) const
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{
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auto it = m_desc.switches.find(name);
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kak_assert(it != m_desc.switches.end());
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for (size_t i = 0; i < m_params.size(); ++i)
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{
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const auto& param = m_params[i];
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if (param[0_byte] == '-' and param.substr(1_byte) == name)
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return it->value.takes_arg ? m_params[i+1] : StringView{};
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if (param == "--")
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break;
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}
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return {};
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}
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}
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