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include/tenzr/txpr/tracer.h

Namespaces

Name
tenzr
tenzr::txpr

Classes

Name
class tenzr::txpr::TracerContext
Per-thread stack of active tracing targets; traced operations append to the innermost active Txpr.
class tenzr::txpr::TracerScope
RAII guard that pushes a Txpr as the active tracing target and pops it on destruction.

Source code

// 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_TRACER_H_
#define TENZR_TXPR_TRACER_H_

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

#include "tenzr/common/error.h"
#include "tenzr/txpr/txpr.h"

namespace tenzr::txpr {

  class TracerContext {
   public:
    [[nodiscard]] static bool IsActive() noexcept;
    [[nodiscard]] static Txpr* CurrentTxpr() noexcept;
    [[nodiscard]] static Txpr* CurrentTape() noexcept { return CurrentTxpr(); }

    static void PushTxpr(Txpr* txpr);
    static void PopTxpr();

    static void PushTape(Txpr* txpr) { PushTxpr(txpr); }

    static void PopTape() { PopTxpr(); }

   private:
    static std::vector<Txpr*>& TxprStack();
  };

  class TracerScope {
   public:
    explicit TracerScope(Txpr& txpr) { TracerContext::PushTxpr(&txpr); }

    ~TracerScope() { TracerContext::PopTxpr(); }

    TracerScope(const TracerScope&) = delete;
    TracerScope& operator=(const TracerScope&) = delete;
    TracerScope(TracerScope&&) = delete;
    TracerScope& operator=(TracerScope&&) = delete;
  };

}  // namespace tenzr::txpr

namespace tenzr {
  using txpr::TracerContext;
  using txpr::TracerScope;
}  // namespace tenzr

#endif  // TENZR_TXPR_TRACER_H_