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Add missing && when forwarding args (#894)

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Without the && args would be copied and perfect forwarding won't work.

Also add template utils to make sure the function only forwards array
and not vector<array>.
This commit is contained in:
Cheng 2024-03-26 06:55:54 +09:00 committed by GitHub
parent 8e686764ac
commit 28fcd2b519
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GPG Key ID: B5690EEEBB952194
4 changed files with 18 additions and 8 deletions
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11
mlx/array.h
View File

@ -510,4 +510,15 @@ void array::init(It src) {
}
}
/* Utilities for determining whether a template parameter is array. */
template <typename T>
inline constexpr bool is_array_v =
std::is_same_v<std::remove_cv_t<std::remove_reference_t<T>>, array>;
template <typename... T>
inline constexpr bool is_arrays_v = (is_array_v<T> && ...);
template <typename... T>
using enable_for_arrays_t = typename std::enable_if_t<is_arrays_v<T...>>;
} // namespace mlx::core

5
mlx/backend/common/utils.h
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@ -89,9 +89,8 @@ collapse_contiguous_dims(const std::vector<array>& xs) {
return collapse_contiguous_dims(xs[0].shape(), strides);
}
template <typename... Arrays>
inline std::tuple<std::vector<int>, std::vector<std::vector<size_t>>>
collapse_contiguous_dims(Arrays... xs) {
template <typename... Arrays, typename = enable_for_arrays_t<Arrays...>>
inline auto collapse_contiguous_dims(Arrays&&... xs) {
return collapse_contiguous_dims(
std::vector<array>{std::forward<Arrays>(xs)...});
}

8
mlx/graph_utils.h
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@ -14,15 +14,15 @@ struct NodeNamer {
void print_graph(std::ostream& os, const std::vector<array>& outputs);
template <typename... Arrays>
void print_graph(std::ostream& os, Arrays... outputs) {
template <typename... Arrays, typename = enable_for_arrays_t<Arrays...>>
void print_graph(std::ostream& os, Arrays&&... outputs) {
print_graph(os, std::vector<array>{std::forward<Arrays>(outputs)...});
}
void export_to_dot(std::ostream& os, const std::vector<array>& outputs);
template <typename... Arrays>
void export_to_dot(std::ostream& os, Arrays... outputs) {
template <typename... Arrays, typename = enable_for_arrays_t<Arrays...>>
void export_to_dot(std::ostream& os, Arrays&&... outputs) {
export_to_dot(os, std::vector<array>{std::forward<Arrays>(outputs)...});
}

2
mlx/transforms.h
View File

@ -8,7 +8,7 @@ namespace mlx::core {
void eval(std::vector<array> outputs);
template <typename... Arrays>
template <typename... Arrays, typename = enable_for_arrays_t<Arrays...>>
void eval(Arrays&&... outputs) {
eval(std::vector<array>{std::forward<Arrays>(outputs)...});
}