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Rewrite PerArgumentCommandCompleter to use compile time dispatching

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No need to store these vectors of std::functions around anymore.
This commit is contained in:
Maxime Coste 2016-09-18 16:07:00 +01:00
parent 8627c93e11
commit d14c39ebdd
3 changed files with 66 additions and 75 deletions
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19
src/command_manager.cc
View File

@ -672,23 +672,4 @@ Completions CommandManager::complete(const Context& context,
return Completions{};
}
Completions PerArgumentCommandCompleter::operator()(const Context& context,
CompletionFlags flags,
CommandParameters params,
size_t token_to_complete,
ByteCount pos_in_token)
const
{
if (token_to_complete >= m_completers.size())
return Completions{};
// it is possible to try to complete a new argument
kak_assert(token_to_complete <= params.size());
const String& argument = token_to_complete < params.size() ?
params[token_to_complete] : String();
return m_completers[token_to_complete](context, flags, argument,
pos_in_token);
}
}

21
src/command_manager.hh
View File

@ -38,27 +38,6 @@ enum class CommandFlags
template<> struct WithBitOps<CommandFlags> : std::true_type {};
class PerArgumentCommandCompleter
{
public:
using ArgumentCompleter = std::function<Completions (const Context&,
CompletionFlags flags,
const String&, ByteCount)>;
using ArgumentCompleterList = ConstArrayView<ArgumentCompleter>;
PerArgumentCommandCompleter(ArgumentCompleterList completers)
: m_completers(completers.begin(), completers.end()) {}
Completions operator()(const Context& context,
CompletionFlags flags,
CommandParameters params,
size_t token_to_complete,
ByteCount pos_in_token) const;
private:
Vector<ArgumentCompleter, MemoryDomain::Commands> m_completers;
};
using CommandInfo = std::pair<String, String>;
struct Token

101
src/commands.cc
View File

@ -62,15 +62,61 @@ Buffer* open_fifo(StringView name, StringView filename, bool scroll)
return create_fifo_buffer(name.str(), fd, scroll);
}
const PerArgumentCommandCompleter filename_completer({
[](const Context& context, CompletionFlags flags, const String& prefix, ByteCount cursor_pos)
{ return Completions{ 0_byte, cursor_pos,
complete_filename(prefix,
context.options()["ignored_files"].get<Regex>(),
cursor_pos) }; }
});
template<typename... Completers> struct PerArgumentCommandCompleter;
static CandidateList complete_buffer_name(StringView query, ByteCount cursor_pos)
template<> struct PerArgumentCommandCompleter<>
{
Completions operator()(const Context&, CompletionFlags, CommandParameters,
size_t, ByteCount) const { return {}; }
};
template<typename Completer, typename... Rest>
struct PerArgumentCommandCompleter<Completer, Rest...> : PerArgumentCommandCompleter<Rest...>
{
template<typename C, typename... R,
typename = typename std::enable_if<not std::is_base_of<PerArgumentCommandCompleter<>,
typename std::remove_reference<C>::type>::value>::type>
PerArgumentCommandCompleter(C&& completer, R&&... rest)
: PerArgumentCommandCompleter<Rest...>(std::forward<R>(rest)...),
m_completer(std::forward<C>(completer)) {}
Completions operator()(const Context& context, CompletionFlags flags,
CommandParameters params, size_t token_to_complete,
ByteCount pos_in_token) const
{
if (token_to_complete == 0)
{
const String& arg = token_to_complete < params.size() ?
params[token_to_complete] : String();
return m_completer(context, flags, arg, pos_in_token);
}
return PerArgumentCommandCompleter<Rest...>::operator()(
context, flags, params, token_to_complete-1, pos_in_token);
}
Completer m_completer;
};
template<typename... Completers>
PerArgumentCommandCompleter<
typename std::remove_cv<
typename std::remove_reference<Completers>::type
>::type...>
make_completer(Completers&&... completers)
{
return {std::forward<Completers>(completers)...};
}
auto filename_completer = make_completer(
[](const Context& context, CompletionFlags flags, const String& prefix, ByteCount cursor_pos)
{ return Completions{ 0_byte, cursor_pos,
complete_filename(prefix,
context.options()["ignored_files"].get<Regex>(),
cursor_pos) }; });
static Completions complete_buffer_name(const Context& context, CompletionFlags flags,
StringView prefix, ByteCount cursor_pos)
{
struct RankedMatchAndBuffer : RankedMatch
{
@ -83,7 +129,7 @@ static CandidateList complete_buffer_name(StringView query, ByteCount cursor_pos
const Buffer* buffer;
};
query = query.substr(0, cursor_pos);
StringView query = prefix.substr(0, cursor_pos);
Vector<RankedMatchAndBuffer> filename_matches;
Vector<RankedMatchAndBuffer> matches;
for (const auto& buffer : BufferManager::instance())
@ -109,13 +155,10 @@ static CandidateList complete_buffer_name(StringView query, ByteCount cursor_pos
for (auto& match : matches)
res.push_back(match.buffer->display_name());
return res;
return { 0, cursor_pos, res };
}
const PerArgumentCommandCompleter buffer_completer({
[](const Context& context, CompletionFlags flags, const String& prefix, ByteCount cursor_pos)
{ return Completions{ 0_byte, cursor_pos, complete_buffer_name(prefix, cursor_pos) }; }
});
auto buffer_completer = make_completer(&complete_buffer_name);
const ParameterDesc no_params{ {}, ParameterDesc::Flags::None, 0, 0 };
const ParameterDesc single_name_param{ {}, ParameterDesc::Flags::None, 1, 1 };
@ -843,9 +886,7 @@ void define_command(const ParametersParser& parser, Context& context, const Shel
CommandParameters params,
size_t token_to_complete, ByteCount pos_in_token)
{
const String& prefix = params[token_to_complete];
return Completions{ 0_byte, pos_in_token,
complete_buffer_name(prefix, pos_in_token) };
return complete_buffer_name(context, flags, params[token_to_complete], pos_in_token);
};
}
else if (auto shell_cmd_opt = parser.get_switch("shell-completion"))
@ -985,9 +1026,7 @@ const CommandDesc alias_cmd = {
ParameterDesc{{}, ParameterDesc::Flags::None, 3, 3},
CommandFlags::None,
CommandHelper{},
PerArgumentCommandCompleter({
complete_scope, complete_nothing, complete_command_name
}),
make_completer(&complete_scope, &complete_nothing, &complete_command_name),
[](const ParametersParser& parser, Context& context, const ShellContext&)
{
if (not CommandManager::instance().command_defined(parser[2]))
@ -1006,10 +1045,7 @@ const CommandDesc unalias_cmd = {
ParameterDesc{{}, ParameterDesc::Flags::None, 2, 3},
CommandFlags::None,
CommandHelper{},
PerArgumentCommandCompleter({
complete_scope, complete_nothing, complete_command_name
}),
make_completer(&complete_scope, &complete_nothing, &complete_command_name),
[](const ParametersParser& parser, Context& context, const ShellContext&)
{
AliasRegistry& aliases = get_scope(parser[0], context).aliases();
@ -1057,12 +1093,12 @@ const CommandDesc debug_cmd = {
ParameterDesc{{}, ParameterDesc::Flags::SwitchesOnlyAtStart, 1},
CommandFlags::None,
CommandHelper{},
PerArgumentCommandCompleter({
make_completer(
[](const Context& context, CompletionFlags flags,
const String& prefix, ByteCount cursor_pos) -> Completions {
auto c = {"info", "buffers", "options", "memory", "shared-strings"};
return { 0_byte, cursor_pos, complete(prefix, cursor_pos, c) };
} }),
}),
[](const ParametersParser& parser, Context& context, const ShellContext&)
{
if (parser[0] == "info")
@ -1621,11 +1657,7 @@ const CommandDesc prompt_cmd = {
ClientManager::instance().complete_client_name(prefix, cursor_pos) };
};
else if (parser.get_switch("buffer-completion"))
completer = [](const Context& context, CompletionFlags,
StringView prefix, ByteCount cursor_pos) -> Completions {
return { 0_byte, cursor_pos,
complete_buffer_name(prefix, cursor_pos) };
};
completer = complete_buffer_name;
else if (parser.get_switch("command-completion"))
completer = [](const Context& context, CompletionFlags flags,
StringView prefix, ByteCount cursor_pos) -> Completions {
@ -1838,7 +1870,7 @@ const CommandDesc face_cmd = {
ParameterDesc{{}, ParameterDesc::Flags::None, 2, 2},
CommandFlags::None,
CommandHelper{},
PerArgumentCommandCompleter({ complete_face, complete_face }),
make_completer(&complete_face, &complete_face),
[](const ParametersParser& parser, Context& context, const ShellContext&)
{
FaceRegistry::instance().register_alias(parser[0], parser[1], true);
@ -1900,15 +1932,14 @@ const CommandDesc change_working_directory_cmd = {
single_optional_name_param,
CommandFlags::None,
CommandHelper{},
PerArgumentCommandCompleter{{
make_completer(
[](const Context& context, CompletionFlags flags,
const String& prefix, ByteCount cursor_pos) -> Completions {
return { 0_byte, cursor_pos,
complete_filename(prefix,
context.options()["ignored_files"].get<Regex>(),
cursor_pos, true) };
}
}},
}),
[](const ParametersParser& parser, Context&, const ShellContext&)
{
StringView target = parser.positional_count() == 1 ? StringView{parser[0]} : "~";