mirror of
https://github.com/encounter/dawn-cmake.git
synced 2025-08-07 04:35:53 +00:00
3bb360f0bb
A fork of utils::Transform() that transforms at most 'n' elements of the input vector. Change-Id: I0ec546f99ee74817ebfd20abf02db5faf5f8ec5c Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/91302 Reviewed-by: Antonio Maiorano <amaiorano@google.com> Commit-Queue: Ben Clayton <bclayton@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com>
92 lines
3.6 KiB
C++
92 lines
3.6 KiB
C++
// Copyright 2021 The Tint Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef SRC_TINT_UTILS_TRANSFORM_H_
|
|
#define SRC_TINT_UTILS_TRANSFORM_H_
|
|
|
|
#include <algorithm>
|
|
#include <type_traits>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
#include "src/tint/traits.h"
|
|
|
|
namespace tint::utils {
|
|
|
|
/// Transform performs an element-wise transformation of a vector.
|
|
/// @param in the input vector.
|
|
/// @param transform the transformation function with signature: `OUT(IN)`
|
|
/// @returns a new vector with each element of the source vector transformed by `transform`.
|
|
template <typename IN, typename TRANSFORMER>
|
|
auto Transform(const std::vector<IN>& in, TRANSFORMER&& transform)
|
|
-> std::vector<decltype(transform(in[0]))> {
|
|
std::vector<decltype(transform(in[0]))> result(in.size());
|
|
for (size_t i = 0; i < result.size(); ++i) {
|
|
result[i] = transform(in[i]);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/// Transform performs an element-wise transformation of a vector.
|
|
/// @param in the input vector.
|
|
/// @param transform the transformation function with signature: `OUT(IN, size_t)`
|
|
/// @returns a new vector with each element of the source vector transformed by `transform`.
|
|
template <typename IN, typename TRANSFORMER>
|
|
auto Transform(const std::vector<IN>& in, TRANSFORMER&& transform)
|
|
-> std::vector<decltype(transform(in[0], 1u))> {
|
|
std::vector<decltype(transform(in[0], 1u))> result(in.size());
|
|
for (size_t i = 0; i < result.size(); ++i) {
|
|
result[i] = transform(in[i], i);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/// TransformN performs an element-wise transformation of a vector, transforming and returning at
|
|
/// most `n` elements.
|
|
/// @param in the input vector.
|
|
/// @param n the maximum number of elements to transform.
|
|
/// @param transform the transformation function with signature: `OUT(IN)`
|
|
/// @returns a new vector with at most n-elements of the source vector transformed by `transform`.
|
|
template <typename IN, typename TRANSFORMER>
|
|
auto TransformN(const std::vector<IN>& in, size_t n, TRANSFORMER&& transform)
|
|
-> std::vector<decltype(transform(in[0]))> {
|
|
const auto count = std::min(n, in.size());
|
|
std::vector<decltype(transform(in[0]))> result(count);
|
|
for (size_t i = 0; i < count; ++i) {
|
|
result[i] = transform(in[i]);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/// TransformN performs an element-wise transformation of a vector, transforming and returning at
|
|
/// most `n` elements.
|
|
/// @param in the input vector.
|
|
/// @param n the maximum number of elements to transform.
|
|
/// @param transform the transformation function with signature: `OUT(IN, size_t)`
|
|
/// @returns a new vector with at most n-elements of the source vector transformed by `transform`.
|
|
template <typename IN, typename TRANSFORMER>
|
|
auto TransformN(const std::vector<IN>& in, size_t n, TRANSFORMER&& transform)
|
|
-> std::vector<decltype(transform(in[0], 1u))> {
|
|
const auto count = std::min(n, in.size());
|
|
std::vector<decltype(transform(in[0], 1u))> result(count);
|
|
for (size_t i = 0; i < count; ++i) {
|
|
result[i] = transform(in[i], i);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
} // namespace tint::utils
|
|
|
|
#endif // SRC_TINT_UTILS_TRANSFORM_H_
|