.. _program_listing_file_src_optimizers_clippers.h:

Program Listing for File clippers.h
===================================

|exhale_lsh| :ref:`Return to documentation for file <file_src_optimizers_clippers.h>` (``src/optimizers/clippers.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #pragma once
   
   #include <map>
   #include <memory>
   
   #include "tensors/tensor.h"
   #include "tensors/allocator.h"
   
   namespace marian {
   
   class Clipper {
   protected:
     Ptr<Allocator> allocator_;
   
   public:
     virtual ~Clipper() {}
   
     virtual float clip(Tensor, float /*costScalingFactor*/ = 1.f) = 0;
     virtual void setAllocator(Ptr<Allocator> allocator) { allocator_ = allocator; }
   };
   
   class ElementwiseClipper : public Clipper {
   public:
     ElementwiseClipper(float c = 10.0) : c_(c) {}
     ~ElementwiseClipper() override {}
   
     float clip(Tensor t, float costScalingFactor = 1.f) override;
   
   private:
     float c_;
   };
   
   class NormClipper : public Clipper {
   public:
     NormClipper(float c = 1.0) : c_(c) {}
     ~NormClipper() override {}
   
     float clip(Tensor t, float costScalingFactor = 1.f) override;
   
   private:
     float c_;
   };
   
   // don't clip, just report Froebenius norm
   class ReportNormClipper : public Clipper {
   public:
     ReportNormClipper(float /*c = 1.0*/)  {}
     ~ReportNormClipper() override {}
   
     float clip(Tensor t, float costScalingFactor = 1.f) override;
   };
   
   }  // namespace marian