include/tenzr/txpr/control_flow.h¶

// Copyright 2026 The Tenzr Project Authors
//
// SPDX-License-Identifier: Apache-2.0
//
// 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
//
//      https://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 TENZR_TXPR_CONTROL_FLOW_H_
#define TENZR_TXPR_CONTROL_FLOW_H_

#include <concepts>
#include <functional>
#include <utility>
#include <vector>

#include "tenzr/array.h"
#include "tenzr/common/export.h"

namespace tenzr::txpr {
  struct ScanResult {
    Array carry;
    Array ys;
  };

  [[nodiscard]] TENZR_API Array Cond(const Array& pred, const std::function<Array()>& true_fn, const std::function<Array()>& false_fn);

  [[nodiscard]] TENZR_API Array Cond(const Array& pred, const std::function<Array(const Array&)>& true_fn, const std::function<Array(const Array&)>& false_fn,
                                     const Array& operand);

  [[nodiscard]] TENZR_API ScanResult Scan(const std::function<ScanResult(const Array& carry, const Array& x)>& body_fn, const Array& init_carry,
                                          const Array& xs, int64_t length = -1);

  [[nodiscard]] TENZR_API Array WhileLoop(const std::function<Array(const Array&)>& cond_fn, const std::function<Array(const Array&)>& body_fn,
                                          const Array& init_val);

}  // namespace tenzr::txpr

namespace tenzr {
  namespace lax {
    using txpr::Cond;
    using txpr::Scan;
    using txpr::WhileLoop;
  }  // namespace lax

  using txpr::Cond;
  using txpr::Scan;
  using txpr::WhileLoop;
}  // namespace tenzr

#endif  // TENZR_TXPR_CONTROL_FLOW_H_