Change 'TensorImpl' mBackend member variable type and move member functions to source file

- type changed from 'const char*' to 'std::string'

include/aidge/backend/TensorImpl.hpp

@@ -72,7 +72,7 @@ private:
 class TensorImpl {
 protected:
 
-    const char *mBackend;
+    const std::string mBackend;
     /// @brief Device id.
     const DeviceIdx_t mDevice;
     /// Number of elements (to be) stored.
@@ -81,7 +81,7 @@ protected:
 public:
     TensorImpl() = delete;
 
-    TensorImpl(const char *backend, DeviceIdx_t device, std::vector<DimSize_t> dims)
+    TensorImpl(const std::string& backend, DeviceIdx_t device, std::vector<DimSize_t> dims)
         : mBackend(backend),
           mDevice(device)
     {
@@ -97,7 +97,7 @@ public:
      * Return the (backend, device) pair for this implementation.
     */
     std::pair<std::string, DeviceIdx_t> device() const noexcept {
-        return std::make_pair(std::string(mBackend), mDevice);
+        return std::make_pair(mBackend, mDevice);
     }
 
     /**
@@ -194,7 +194,7 @@ public:
         AIDGE_THROW_OR_ABORT(std::runtime_error, "Function not implented");
     }
 
-    constexpr const char *backend() const { return mBackend; }
+    const std::string backend() const { return mBackend; }
 
     /**
      * @brief Copy from another backend.

include/aidge/backend/cpu/data/TensorImpl.hpp

@@ -14,7 +14,6 @@
 
 #include "aidge/backend/TensorImpl.hpp"
 #include "aidge/data/Tensor.hpp"
-#include "aidge/data/half.hpp"
 #include "aidge/utils/Registrar.hpp"
 #include "aidge/utils/Types.h"
 #include "aidge/utils/ErrorHandling.hpp"
@@ -31,21 +30,12 @@ private:
     std::unique_ptr<T[]> mDataOwner;
 
 public:
-    static constexpr const char *Backend = "cpu";
+    static const std::string Backend;
 
+public:
     TensorImpl_cpu(DeviceIdx_t device, std::vector<DimSize_t> dims) : TensorImpl(Backend, device, dims) {}
 
-    bool operator==(const TensorImpl &otherImpl) const override final {
-        const auto& typedOtherImpl = reinterpret_cast<const TensorImpl_cpu<T> &>(otherImpl);
-        AIDGE_INTERNAL_ASSERT(typedOtherImpl.size() >= mNbElts);
-
-        std::size_t i = 0;
-        for (; i < mNbElts &&
-               *static_cast<const T*>(rawPtr(i)) == *static_cast<const T*>(typedOtherImpl.rawPtr(i));
-               ++i) {
-        }
-        return i == mNbElts;
-    }
+    bool operator==(const TensorImpl &other) const override final;
 
     static std::shared_ptr<TensorImpl_cpu> create(DeviceIdx_t device, std::vector<DimSize_t> dims) {
         return std::make_shared<TensorImpl_cpu<T>>(device, dims);
@@ -53,14 +43,7 @@ public:
 
     inline std::size_t scalarSize() const noexcept override final { return sizeof(T); }
 
-    void zeros() override final {
-        if (mData.empty()) {
-            lazyInit();
-        }
-        for (std::size_t i = 0; i < mData.size(); ++i) {
-            *(mData.data() + i) = T(0);
-        }
-    }
+    void zeros() override final;
 
     void copy(const void *src, NbElts_t length, NbElts_t offset = 0) override final {
         const T* srcT = static_cast<const T *>(src);
@@ -71,64 +54,7 @@ public:
         std::copy(srcT, srcT + length, dstT);
     }
 
-    void copyCast(const void *src, const DataType srcDt, NbElts_t length, NbElts_t offset = 0) override final {
-        if (length == 0) {
-            return;
-        }
-
-        T* dstT = static_cast<T *>(rawPtr(offset));
-        AIDGE_ASSERT(length <= mData.size() || length <= mNbElts, "copy length is above capacity");
-        switch (srcDt)
-        {
-            case DataType::Float64:
-                std::copy(static_cast<const double*>(src), static_cast<const double*>(src) + length,
-                        dstT);
-                break;
-            case DataType::Float32:
-                std::copy(static_cast<const float*>(src), static_cast<const float*>(src) + length,
-                        dstT);
-                break;
-            case DataType::Float16:
-                std::copy(static_cast<const half_float::half*>(src), static_cast<const half_float::half*>(src) + length,
-                        dstT);
-                break;
-            case DataType::Int64:
-                std::copy(static_cast<const int64_t*>(src), static_cast<const int64_t*>(src) + length,
-                        dstT);
-                break;
-            case DataType::UInt64:
-                std::copy(static_cast<const uint64_t*>(src), static_cast<const uint64_t*>(src) + length,
-                        dstT);
-                break;
-            case DataType::Int32:
-                std::copy(static_cast<const int32_t*>(src), static_cast<const int32_t*>(src) + length,
-                        dstT);
-                break;
-            case DataType::UInt32:
-                std::copy(static_cast<const uint32_t*>(src), static_cast<const uint32_t*>(src) + length,
-                        dstT);
-                break;
-            case DataType::Int16:
-                std::copy(static_cast<const int16_t*>(src), static_cast<const int16_t*>(src) + length,
-                        dstT);
-                break;
-            case DataType::UInt16:
-                std::copy(static_cast<const uint16_t*>(src), static_cast<const uint16_t*>(src) + length,
-                        dstT);
-                break;
-            case DataType::Int8:
-                std::copy(static_cast<const int8_t*>(src), static_cast<const int8_t*>(src) + length,
-                        dstT);
-                break;
-            case DataType::UInt8:
-                std::copy(static_cast<const uint8_t*>(src), static_cast<const uint8_t*>(src) + length,
-                        dstT);
-                break;
-            default:
-                AIDGE_THROW_OR_ABORT(std::runtime_error, "Unsupported data type.");
-                break;
-        }
-    }
+    void copyCast(const void *src, const DataType srcDt, NbElts_t length, NbElts_t offset = 0) override final;
 
     void copyFromDevice(const void *src, const std::pair<std::string, DeviceIdx_t>& device, NbElts_t length, NbElts_t offset = 0) override final {
         AIDGE_ASSERT(device.first == Backend, "backend must match");
@@ -185,6 +111,10 @@ private:
     }
 };
 
+
+template <typename T>
+const std::string TensorImpl_cpu<T>::Backend = "cpu";
+
 namespace {
 static Registrar<Tensor> registrarTensorImpl_cpu_Float64(
         {"cpu", DataType::Float64}, Aidge::TensorImpl_cpu<double>::create);

src/backend/cpu/data/TensorImpl.cpp

+/********************************************************************************
+ * Copyright (c) 2023 CEA-List
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ ********************************************************************************/
+
+#include "aidge/backend/cpu/data/TensorImpl.hpp"
+
+#include <algorithm>  // std::copy
+#include <cstddef>    // std::size_t
+#include <cstdint>    // std::uint8_t, std::int8_t, std::uint16_t, std::int16_t,
+                      // std::uint32_t, std::int32_t, std::uint64_t, std::int64_t
+#include <string>
+
+#include "aidge/data/half.hpp"
+#include "aidge/utils/ErrorHandling.hpp"
+#include "aidge/utils/Types.h"
+
+
+template <typename T>
+bool Aidge::TensorImpl_cpu<T>::operator==(const Aidge::TensorImpl &other) const {
+    const auto& typedOtherImpl = reinterpret_cast<const TensorImpl_cpu<T>&>(other);
+    AIDGE_INTERNAL_ASSERT(typedOtherImpl.size() >= mNbElts);
+
+    std::size_t i = 0;
+    for (;
+        i < mNbElts &&
+            *static_cast<const T*>(rawPtr(i)) == *static_cast<const T*>(typedOtherImpl.rawPtr(i));
+        ++i)
+    {}
+    return i == mNbElts;
+}
+
+template <typename T>
+void Aidge::TensorImpl_cpu<T>::zeros() {
+    if (mData.empty()) {
+        lazyInit();
+    }
+    for (std::size_t i = 0; i < mData.size(); ++i) {
+        *(mData.data() + i) = T(0);
+    }
+}
+
+template <typename T>
+void Aidge::TensorImpl_cpu<T>::copyCast(const void *src, const Aidge::DataType srcDt, Aidge::NbElts_t length, Aidge::NbElts_t offset) {
+    if (length == 0) {
+        return;
+    }
+
+    T* dstT = static_cast<T *>(rawPtr(offset));
+    AIDGE_ASSERT(length <= mData.size() || length <= mNbElts, "copy length is above capacity");
+    switch (srcDt)
+    {
+        case DataType::Float64:
+            std::copy(static_cast<const double*>(src), static_cast<const double*>(src) + length,
+                    dstT);
+            break;
+        case DataType::Float32:
+            std::copy(static_cast<const float*>(src), static_cast<const float*>(src) + length,
+                    dstT);
+            break;
+        case DataType::Float16:
+            std::copy(static_cast<const half_float::half*>(src), static_cast<const half_float::half*>(src) + length,
+                    dstT);
+            break;
+        case DataType::Int64:
+            std::copy(static_cast<const int64_t*>(src), static_cast<const int64_t*>(src) + length,
+                    dstT);
+            break;
+        case DataType::UInt64:
+            std::copy(static_cast<const uint64_t*>(src), static_cast<const uint64_t*>(src) + length,
+                    dstT);
+            break;
+        case DataType::Int32:
+            std::copy(static_cast<const int32_t*>(src), static_cast<const int32_t*>(src) + length,
+                    dstT);
+            break;
+        case DataType::UInt32:
+            std::copy(static_cast<const uint32_t*>(src), static_cast<const uint32_t*>(src) + length,
+                    dstT);
+            break;
+        case DataType::Int16:
+            std::copy(static_cast<const int16_t*>(src), static_cast<const int16_t*>(src) + length,
+                    dstT);
+            break;
+        case DataType::UInt16:
+            std::copy(static_cast<const uint16_t*>(src), static_cast<const uint16_t*>(src) + length,
+                    dstT);
+            break;
+        case DataType::Int8:
+            std::copy(static_cast<const int8_t*>(src), static_cast<const int8_t*>(src) + length,
+                    dstT);
+            break;
+        case DataType::UInt8:
+            std::copy(static_cast<const uint8_t*>(src), static_cast<const uint8_t*>(src) + length,
+                    dstT);
+            break;
+        default:
+            AIDGE_THROW_OR_ABORT(std::runtime_error, "Unsupported data type.");
+            break;
+    }
+}
\ No newline at end of file