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rotate function

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This commit is contained in:
Robert Bendun 2022-06-14 11:39:04 +02:00
parent 55554606a1
commit 910792e383
1 changed files with 13 additions and 0 deletions
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13
src/interpreter.cc
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@ -430,6 +430,19 @@ Interpreter::Interpreter()
}});
});
global.force_define("rotate", +[](Interpreter &i, std::vector<Value> args) -> Result<Value> {
assert(!args.empty(), "rotate requires offset"); // TODO(assert)
auto offset = std::move(args.front()).n.as_int();
auto array = Try(into_flat_array(i, std::span(args).subspan(1)));
offset = offset % array.elements.size();
if (offset > 0) {
std::rotate(array.elements.begin(), array.elements.begin() + offset, array.elements.end());
} else if (offset < 0) {
std::rotate(array.elements.rbegin(), array.elements.rbegin() + (-offset), array.elements.rend());
}
return Value::from(std::move(array));
});
global.force_define("chord", +[](Interpreter &i, std::vector<Value> args) -> Result<Value> {
Chord chord;
Try(create_chord(chord.notes, i, std::move(args)));