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play as evaluation operator

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This commit is contained in:
Robert Bendun 2022-08-21 16:49:54 +02:00
parent 5c47b7b808
commit b9eb3f957d
1 changed files with 28 additions and 62 deletions
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90
src/builtin_functions.cc
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@ -61,34 +61,6 @@ static inline Result<void> create_chord(std::vector<Note> &chord, Interpreter &i
return {};
}
template<Iterable T>
static inline Result<void> builtin_play(Interpreter &interpreter, T args)
{
for (auto i = 0u; i < args.size(); ++i) {
Value arg;
if constexpr (With_Index_Method<T>) {
arg = Try(args.index(interpreter, i));
} else {
arg = std::move(args[i]);
}
switch (arg.type) {
case Value::Type::Array:
case Value::Type::Block:
Try(builtin_play(interpreter, std::move(arg)));
break;
case Value::Type::Music:
Try(interpreter.play(arg.chord));
break;
default:
assert(false, "this type does not support playing");
}
}
return {};
}
template<auto Mem_Ptr>
Result<Value> ctx_read_write_property(Interpreter &interpreter, std::vector<Value> args)
@ -269,6 +241,29 @@ static inline Result<void> sequential_play(Interpreter &i, Value v)
return {};
}
template<With_Index_Operator Container = std::vector<Value>>
static inline Result<Value> builtin_play(Interpreter &i, Container args)
{
Try(ensure_midi_connection_available(i, Midi_Connection_Type::Output, "play"));
auto previous_action = std::exchange(i.default_action, action_play);
i.context_stack.push_back(i.context_stack.back());
auto const finally = [&] {
i.default_action = std::move(previous_action);
i.context_stack.pop_back();
};
for (auto &el : args) {
if (std::optional<Error> error = sequential_play(i, std::move(el))) {
finally();
return *std::move(error);
}
}
finally();
return {};
}
static Result<Value> builtin_par(Interpreter &i, std::vector<Value> args) {
Try(ensure_midi_connection_available(i, Midi_Connection_Type::Output, "par"));
@ -287,38 +282,12 @@ static Result<Value> builtin_par(Interpreter &i, std::vector<Value> args) {
i.midi_connection->send_note_on(0, *note.into_midi_note(), 127);
}
auto previous_action = std::exchange(i.default_action, action_play);
i.context_stack.push_back(i.context_stack.back());
auto result = builtin_play(i, std::span(args).subspan(1));
auto const chord_off = [&] {
for (auto const& note : chord.notes) {
i.midi_connection->send_note_off(0, *note.into_midi_note(), 127);
}
i.default_action = std::move(previous_action);
i.context_stack.pop_back();
};
for (auto it = std::next(args.begin()); it != args.end(); ++it) {
std::optional<Error> error = std::nullopt;
switch (it->type) {
break;
case Value::Type::Music:
case Value::Type::Array:
case Value::Type::Block:
error = sequential_play(i, *it);
break; default:
unimplemented(); // type matching error
}
if (error) {
chord_off();
return *std::move(error);
}
for (auto const& note : chord.notes) {
i.midi_connection->send_note_off(0, *note.into_midi_note(), 127);
}
chord_off();
return Value{};
return result;
}
void Interpreter::register_builtin_functions()
@ -383,10 +352,7 @@ error:
return Value::from(Number(args.front().size()));
});
global.force_define("play", +[](Interpreter &i, std::vector<Value> args) -> Result<Value> {
Try(builtin_play(i, std::move(args)));
return Value{};
});
global.force_define("play", builtin_play);
global.force_define("flat", +[](Interpreter &i, std::vector<Value> args) -> Result<Value> {
return Value::from(Try(into_flat_array(i, std::move(args))));