X-Git-Url: https://git.efficios.com/?a=blobdiff_plain;f=src%2Fcpp-common%2Fbt2%2Fvalue.hpp;h=7388c3403a7558c0e94fefcd8527a2fdac80c249;hb=bd6e66fd0c3012ad6bcb03cdb3fb687767fb6ccf;hp=7c4e4a997c5b04596ec0fd8ece7930580f0d643a;hpb=dcb8ae9be121cdae6f6d16757d2233d705df057d;p=babeltrace.git

diff --git a/src/cpp-common/bt2/value.hpp b/src/cpp-common/bt2/value.hpp
index 7c4e4a99..7388c340 100644
--- a/src/cpp-common/bt2/value.hpp
+++ b/src/cpp-common/bt2/value.hpp
@@ -15,13 +15,14 @@
 
 #include "common/assert.h"
 #include "common/common.h"
-#include "cpp-common/optional.hpp"
-#include "cpp-common/string_view.hpp"
+#include "cpp-common/bt2c/c-string-view.hpp"
 
+#include "borrowed-object-iterator.hpp"
 #include "borrowed-object.hpp"
-#include "common-iterator.hpp"
 #include "exc.hpp"
 #include "internal/utils.hpp"
+#include "optional-borrowed-object.hpp"
+#include "raw-value-proxy.hpp"
 #include "shared-object.hpp"
 
 namespace bt2 {
@@ -81,56 +82,44 @@ enum class ValueType
     MAP = BT_VALUE_TYPE_MAP,
 };
 
-template <typename LibObjT>
-class CommonClockClass;
-
-template <typename LibObjT>
-class CommonFieldClass;
-
-template <typename LibObjT>
-class CommonTraceClass;
-
-template <typename LibObjT>
-class CommonStreamClass;
+template <typename ValueObjT>
+class CommonValueRawValueProxy final
+{
+public:
+    explicit CommonValueRawValueProxy(const ValueObjT obj) : _mObj {obj}
+    {
+    }
 
-template <typename LibObjT>
-class CommonEventClass;
+    CommonValueRawValueProxy& operator=(bool rawVal) noexcept;
+    CommonValueRawValueProxy& operator=(std::int64_t rawVal) noexcept;
+    CommonValueRawValueProxy& operator=(std::uint64_t rawVal) noexcept;
+    CommonValueRawValueProxy& operator=(double rawVal) noexcept;
+    CommonValueRawValueProxy& operator=(const char *rawVal);
+    CommonValueRawValueProxy& operator=(bt2c::CStringView rawVal);
+    operator bool() const noexcept;
+    operator std::int64_t() const noexcept;
+    operator std::uint64_t() const noexcept;
+    operator double() const noexcept;
+    operator bt2c::CStringView() const noexcept;
 
-template <typename LibObjT>
-class CommonStream;
+private:
+    ValueObjT _mObj;
+};
 
 template <typename LibObjT>
 class CommonValue : public BorrowedObject<LibObjT>
 {
-    /* Allow append() to call `val.libObjPtr()` */
-    friend class CommonArrayValue<bt_value>;
-
-    /* Allow insert() to call `val.libObjPtr()` */
-    friend class CommonMapValue<bt_value>;
-
-    /* Allow userAttributes() to call `val.libObjPtr()` */
-    friend class CommonClockClass<bt_clock_class>;
-    friend class CommonFieldClass<bt_field_class>;
-    friend class CommonTraceClass<bt_trace_class>;
-    friend class CommonStreamClass<bt_stream_class>;
-    friend class CommonEventClass<bt_event_class>;
-    friend class CommonStream<bt_stream>;
-
-    /* Allow operator==() to call `other.libObjPtr()` */
-    friend class CommonValue<bt_value>;
-    friend class CommonValue<const bt_value>;
-
 private:
     using typename BorrowedObject<LibObjT>::_ThisBorrowedObject;
 
 protected:
-    using typename BorrowedObject<LibObjT>::_LibObjPtr;
     using _ThisCommonValue = CommonValue<LibObjT>;
 
 public:
+    using typename BorrowedObject<LibObjT>::LibObjPtr;
     using Shared = SharedValue<CommonValue<LibObjT>, LibObjT>;
 
-    explicit CommonValue(const _LibObjPtr libObjPtr) noexcept : _ThisBorrowedObject {libObjPtr}
+    explicit CommonValue(const LibObjPtr libObjPtr) noexcept : _ThisBorrowedObject {libObjPtr}
     {
     }
 
@@ -140,12 +129,17 @@ public:
     }
 
     template <typename OtherLibObjT>
-    _ThisCommonValue& operator=(const CommonValue<OtherLibObjT> val) noexcept
+    _ThisCommonValue operator=(const CommonValue<OtherLibObjT> val) noexcept
     {
         _ThisBorrowedObject::operator=(val);
         return *this;
     }
 
+    CommonValue<const bt_value> asConst() const noexcept
+    {
+        return CommonValue<const bt_value> {*this};
+    }
+
     ValueType type() const noexcept
     {
         return static_cast<ValueType>(bt_value_get_type(this->libObjPtr()));
@@ -208,6 +202,66 @@ public:
         return !(*this == other);
     }
 
+    CommonValueRawValueProxy<CommonValue> operator*() const noexcept
+    {
+        return CommonValueRawValueProxy<CommonValue> {*this};
+    }
+
+    std::uint64_t arrayLength() const noexcept
+    {
+        return this->asArray().length();
+    }
+
+    bool arrayIsEmpty() const noexcept
+    {
+        return this->asArray().isEmpty();
+    }
+
+    CommonValue<LibObjT> operator[](const std::uint64_t index) const noexcept
+    {
+        return this->asArray()[index];
+    }
+
+    template <typename T>
+    void append(T&& elem) const
+    {
+        this->asArray().append(std::forward<T>(elem));
+    }
+
+    CommonArrayValue<bt_value> appendEmptyArray() const;
+    CommonMapValue<bt_value> appendEmptyMap() const;
+
+    std::uint64_t mapLength() const noexcept
+    {
+        return this->asMap().length();
+    }
+
+    bool mapIsEmpty() const noexcept
+    {
+        return this->asMap().isEmpty();
+    }
+
+    template <typename KeyT>
+    OptionalBorrowedObject<CommonValue<LibObjT>> operator[](KeyT&& key) const noexcept
+    {
+        return this->asMap()[std::forward<KeyT>(key)];
+    }
+
+    template <typename KeyT>
+    bool hasEntry(KeyT&& key) const noexcept
+    {
+        return this->asMap().hasEntry(std::forward<KeyT>(key));
+    }
+
+    template <typename KeyT, typename ValT>
+    void insert(KeyT&& key, ValT&& val) const
+    {
+        this->asMap().insert(std::forward<KeyT>(key), std::forward<ValT>(val));
+    }
+
+    CommonArrayValue<bt_value> insertEmptyArray(bt2c::CStringView key) const;
+    CommonMapValue<bt_value> insertEmptyMap(bt2c::CStringView key) const;
+
     Shared shared() const noexcept
     {
         return Shared::createWithRef(*this);
@@ -238,6 +292,84 @@ protected:
 using Value = CommonValue<bt_value>;
 using ConstValue = CommonValue<const bt_value>;
 
+template <typename ValueObjT>
+CommonValueRawValueProxy<ValueObjT>&
+CommonValueRawValueProxy<ValueObjT>::operator=(const bool rawVal) noexcept
+{
+    _mObj.asBool().value(rawVal);
+    return *this;
+}
+
+template <typename ValueObjT>
+CommonValueRawValueProxy<ValueObjT>&
+CommonValueRawValueProxy<ValueObjT>::operator=(const std::int64_t rawVal) noexcept
+{
+    _mObj.asSignedInteger().value(rawVal);
+    return *this;
+}
+
+template <typename ValueObjT>
+CommonValueRawValueProxy<ValueObjT>&
+CommonValueRawValueProxy<ValueObjT>::operator=(const std::uint64_t rawVal) noexcept
+{
+    _mObj.asUnsignedInteger().value(rawVal);
+    return *this;
+}
+
+template <typename ValueObjT>
+CommonValueRawValueProxy<ValueObjT>&
+CommonValueRawValueProxy<ValueObjT>::operator=(const double rawVal) noexcept
+{
+    _mObj.asReal().value(rawVal);
+    return *this;
+}
+
+template <typename ValueObjT>
+CommonValueRawValueProxy<ValueObjT>&
+CommonValueRawValueProxy<ValueObjT>::operator=(const char * const rawVal)
+{
+    _mObj.asString().value(rawVal);
+    return *this;
+}
+
+template <typename ValueObjT>
+CommonValueRawValueProxy<ValueObjT>&
+CommonValueRawValueProxy<ValueObjT>::operator=(const bt2c::CStringView rawVal)
+{
+    _mObj.asString().value(rawVal);
+    return *this;
+}
+
+template <typename ValueObjT>
+CommonValueRawValueProxy<ValueObjT>::operator bool() const noexcept
+{
+    return _mObj.asBool().value();
+}
+
+template <typename ValueObjT>
+CommonValueRawValueProxy<ValueObjT>::operator std::int64_t() const noexcept
+{
+    return _mObj.asSignedInteger().value();
+}
+
+template <typename ValueObjT>
+CommonValueRawValueProxy<ValueObjT>::operator std::uint64_t() const noexcept
+{
+    return _mObj.asUnsignedInteger().value();
+}
+
+template <typename ValueObjT>
+CommonValueRawValueProxy<ValueObjT>::operator double() const noexcept
+{
+    return _mObj.asReal().value();
+}
+
+template <typename ValueObjT>
+CommonValueRawValueProxy<ValueObjT>::operator bt2c::CStringView() const noexcept
+{
+    return _mObj.asString().value();
+}
+
 namespace internal {
 
 struct ValueTypeDescr
@@ -277,12 +409,17 @@ public:
     }
 
     template <typename OtherLibObjT>
-    CommonNullValue<LibObjT>& operator=(const CommonNullValue<OtherLibObjT> val) noexcept
+    CommonNullValue<LibObjT> operator=(const CommonNullValue<OtherLibObjT> val) noexcept
     {
         _ThisCommonValue::operator=(val);
         return *this;
     }
 
+    CommonNullValue<const bt_value> asConst() const noexcept
+    {
+        return CommonNullValue<const bt_value> {*this};
+    }
+
     Shared shared() const noexcept
     {
         return Shared::createWithRef(*this);
@@ -316,14 +453,14 @@ template <typename LibObjT>
 class CommonBoolValue final : public CommonValue<LibObjT>
 {
 private:
-    using typename CommonValue<LibObjT>::_LibObjPtr;
     using typename CommonValue<LibObjT>::_ThisCommonValue;
 
 public:
+    using typename CommonValue<LibObjT>::LibObjPtr;
     using Shared = SharedValue<CommonBoolValue<LibObjT>, LibObjT>;
     using Value = bool;
 
-    explicit CommonBoolValue(const _LibObjPtr libObjPtr) noexcept : _ThisCommonValue {libObjPtr}
+    explicit CommonBoolValue(const LibObjPtr libObjPtr) noexcept : _ThisCommonValue {libObjPtr}
     {
         BT_ASSERT_DBG(this->isBool());
     }
@@ -342,18 +479,20 @@ public:
     }
 
     template <typename OtherLibObjT>
-    CommonBoolValue<LibObjT>& operator=(const CommonBoolValue<OtherLibObjT> val) noexcept
+    CommonBoolValue<LibObjT> operator=(const CommonBoolValue<OtherLibObjT> val) noexcept
     {
         _ThisCommonValue::operator=(val);
         return *this;
     }
 
-    CommonBoolValue<LibObjT> operator=(const Value rawVal) const noexcept
+    CommonBoolValue<const bt_value> asConst() const noexcept
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        return CommonBoolValue<const bt_value> {*this};
+    }
 
-        bt_value_bool_set(this->libObjPtr(), static_cast<bt_bool>(rawVal));
-        return *this;
+    RawValueProxy<CommonBoolValue> operator*() const noexcept
+    {
+        return RawValueProxy<CommonBoolValue> {*this};
     }
 
     Value value() const noexcept
@@ -361,9 +500,11 @@ public:
         return static_cast<Value>(bt_value_bool_get(this->libObjPtr()));
     }
 
-    operator Value() const noexcept
+    void value(const Value val) const noexcept
     {
-        return this->value();
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstBoolValue`.");
+
+        bt_value_bool_set(this->libObjPtr(), static_cast<bt_bool>(val));
     }
 
     Shared shared() const noexcept
@@ -399,14 +540,14 @@ template <typename LibObjT>
 class CommonUnsignedIntegerValue final : public CommonValue<LibObjT>
 {
 private:
-    using typename CommonValue<LibObjT>::_LibObjPtr;
     using typename CommonValue<LibObjT>::_ThisCommonValue;
 
 public:
+    using typename CommonValue<LibObjT>::LibObjPtr;
     using Shared = SharedValue<CommonUnsignedIntegerValue<LibObjT>, LibObjT>;
     using Value = std::uint64_t;
 
-    explicit CommonUnsignedIntegerValue(const _LibObjPtr libObjPtr) noexcept :
+    explicit CommonUnsignedIntegerValue(const LibObjPtr libObjPtr) noexcept :
         _ThisCommonValue {libObjPtr}
     {
         BT_ASSERT_DBG(this->isUnsignedInteger());
@@ -427,29 +568,34 @@ public:
     }
 
     template <typename OtherLibObjT>
-    CommonUnsignedIntegerValue<LibObjT>&
+    CommonUnsignedIntegerValue<LibObjT>
     operator=(const CommonUnsignedIntegerValue<OtherLibObjT> val) noexcept
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
-
         _ThisCommonValue::operator=(val);
         return *this;
     }
 
-    CommonUnsignedIntegerValue<LibObjT> operator=(const Value rawVal) const noexcept
+    CommonUnsignedIntegerValue<const bt_value> asConst() const noexcept
     {
-        bt_value_integer_unsigned_set(this->libObjPtr(), rawVal);
-        return *this;
+        return CommonUnsignedIntegerValue<const bt_value> {*this};
     }
 
-    Value value() const noexcept
+    RawValueProxy<CommonUnsignedIntegerValue> operator*() const noexcept
     {
-        return bt_value_integer_unsigned_get(this->libObjPtr());
+        return RawValueProxy<CommonUnsignedIntegerValue> {*this};
     }
 
-    operator Value() const noexcept
+    void value(const Value val) const noexcept
     {
-        return this->value();
+        static_assert(!std::is_const<LibObjT>::value,
+                      "Not available with `bt2::ConstUnsignedIntegerValue`.");
+
+        bt_value_integer_unsigned_set(this->libObjPtr(), val);
+    }
+
+    Value value() const noexcept
+    {
+        return bt_value_integer_unsigned_get(this->libObjPtr());
     }
 
     Shared shared() const noexcept
@@ -485,14 +631,14 @@ template <typename LibObjT>
 class CommonSignedIntegerValue final : public CommonValue<LibObjT>
 {
 private:
-    using typename CommonValue<LibObjT>::_LibObjPtr;
     using typename CommonValue<LibObjT>::_ThisCommonValue;
 
 public:
+    using typename CommonValue<LibObjT>::LibObjPtr;
     using Shared = SharedValue<CommonSignedIntegerValue<LibObjT>, LibObjT>;
     using Value = std::int64_t;
 
-    explicit CommonSignedIntegerValue(const _LibObjPtr libObjPtr) noexcept :
+    explicit CommonSignedIntegerValue(const LibObjPtr libObjPtr) noexcept :
         _ThisCommonValue {libObjPtr}
     {
         BT_ASSERT_DBG(this->isSignedInteger());
@@ -520,22 +666,27 @@ public:
         return *this;
     }
 
-    CommonSignedIntegerValue<LibObjT> operator=(const Value rawVal) const noexcept
+    CommonSignedIntegerValue<const bt_value> asConst() const noexcept
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        return CommonSignedIntegerValue<const bt_value> {*this};
+    }
 
-        bt_value_integer_signed_set(this->libObjPtr(), rawVal);
-        return *this;
+    RawValueProxy<CommonSignedIntegerValue> operator*() const noexcept
+    {
+        return RawValueProxy<CommonSignedIntegerValue> {*this};
     }
 
-    Value value() const noexcept
+    void value(const Value val) const noexcept
     {
-        return bt_value_integer_signed_get(this->libObjPtr());
+        static_assert(!std::is_const<LibObjT>::value,
+                      "Not available with `bt2::ConstSignedIntegerValue`.");
+
+        bt_value_integer_signed_set(this->libObjPtr(), val);
     }
 
-    operator Value() const noexcept
+    Value value() const noexcept
     {
-        return this->value();
+        return bt_value_integer_signed_get(this->libObjPtr());
     }
 
     Shared shared() const noexcept
@@ -571,14 +722,14 @@ template <typename LibObjT>
 class CommonRealValue final : public CommonValue<LibObjT>
 {
 private:
-    using typename CommonValue<LibObjT>::_LibObjPtr;
     using typename CommonValue<LibObjT>::_ThisCommonValue;
 
 public:
+    using typename CommonValue<LibObjT>::LibObjPtr;
     using Shared = SharedValue<CommonRealValue<LibObjT>, LibObjT>;
     using Value = double;
 
-    explicit CommonRealValue(const _LibObjPtr libObjPtr) noexcept : _ThisCommonValue {libObjPtr}
+    explicit CommonRealValue(const LibObjPtr libObjPtr) noexcept : _ThisCommonValue {libObjPtr}
     {
         BT_ASSERT_DBG(this->isReal());
     }
@@ -597,28 +748,32 @@ public:
     }
 
     template <typename OtherLibObjT>
-    CommonRealValue<LibObjT>& operator=(const CommonRealValue<OtherLibObjT> val) noexcept
+    CommonRealValue<LibObjT> operator=(const CommonRealValue<OtherLibObjT> val) noexcept
     {
         _ThisCommonValue::operator=(val);
         return *this;
     }
 
-    CommonRealValue<LibObjT> operator=(const Value rawVal) const noexcept
+    CommonRealValue<const bt_value> asConst() const noexcept
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        return CommonRealValue<const bt_value> {*this};
+    }
 
-        bt_value_real_set(this->libObjPtr(), rawVal);
-        return *this;
+    RawValueProxy<CommonRealValue> operator*() const noexcept
+    {
+        return RawValueProxy<CommonRealValue> {*this};
     }
 
-    Value value() const noexcept
+    void value(const Value val) const noexcept
     {
-        return bt_value_real_get(this->libObjPtr());
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstRealValue`.");
+
+        bt_value_real_set(this->libObjPtr(), val);
     }
 
-    operator Value() const noexcept
+    Value value() const noexcept
     {
-        return this->value();
+        return bt_value_real_get(this->libObjPtr());
     }
 
     Shared shared() const noexcept
@@ -654,18 +809,19 @@ template <typename LibObjT>
 class CommonStringValue final : public CommonValue<LibObjT>
 {
 private:
-    using typename CommonValue<LibObjT>::_LibObjPtr;
     using typename CommonValue<LibObjT>::_ThisCommonValue;
 
 public:
+    using typename CommonValue<LibObjT>::LibObjPtr;
     using Shared = SharedValue<CommonStringValue<LibObjT>, LibObjT>;
+    using Value = bt2c::CStringView;
 
-    explicit CommonStringValue(const _LibObjPtr libObjPtr) noexcept : _ThisCommonValue {libObjPtr}
+    explicit CommonStringValue(const LibObjPtr libObjPtr) noexcept : _ThisCommonValue {libObjPtr}
     {
         BT_ASSERT_DBG(this->isString());
     }
 
-    static Shared create(const char * const rawVal = "")
+    static Shared create(const bt2c::CStringView rawVal = "")
     {
         const auto libObjPtr = bt_value_string_create_init(rawVal);
 
@@ -673,42 +829,41 @@ public:
         return CommonStringValue::Shared::createWithoutRef(libObjPtr);
     }
 
-    static Shared create(const std::string& rawVal)
-    {
-        return CommonStringValue::create(rawVal.data());
-    }
-
     template <typename OtherLibObjT>
     CommonStringValue(const CommonStringValue<OtherLibObjT> val) noexcept : _ThisCommonValue {val}
     {
     }
 
     template <typename OtherLibObjT>
-    CommonStringValue<LibObjT>& operator=(const CommonStringValue<OtherLibObjT> val) noexcept
+    CommonStringValue<LibObjT> operator=(const CommonStringValue<OtherLibObjT> val) noexcept
     {
         _ThisCommonValue::operator=(val);
         return *this;
     }
 
-    CommonStringValue<LibObjT> operator=(const char * const rawVal) const
+    CommonStringValue<const bt_value> asConst() const noexcept
+    {
+        return CommonStringValue<const bt_value> {*this};
+    }
+
+    RawValueProxy<CommonStringValue> operator*() const noexcept
+    {
+        return RawValueProxy<CommonStringValue> {*this};
+    }
+
+    void value(const Value val) const
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value,
+                      "Not available with `bt2::ConstStringValue`.");
 
-        const auto status = bt_value_string_set(this->libObjPtr(), rawVal);
+        const auto status = bt_value_string_set(this->libObjPtr(), *val);
 
         if (status == BT_VALUE_STRING_SET_STATUS_MEMORY_ERROR) {
             throw MemoryError {};
         }
-
-        return *this;
-    }
-
-    CommonStringValue<LibObjT> operator=(const std::string& rawVal) const noexcept
-    {
-        return *this = rawVal.data();
     }
 
-    bpstd::string_view value() const noexcept
+    Value value() const noexcept
     {
         return bt_value_string_get(this->libObjPtr());
     }
@@ -770,14 +925,14 @@ template <typename LibObjT>
 class CommonArrayValue final : public CommonValue<LibObjT>
 {
 private:
-    using typename CommonValue<LibObjT>::_LibObjPtr;
     using typename CommonValue<LibObjT>::_ThisCommonValue;
 
 public:
+    using typename CommonValue<LibObjT>::LibObjPtr;
     using Shared = SharedValue<CommonArrayValue<LibObjT>, LibObjT>;
-    using Iterator = CommonIterator<CommonArrayValue<LibObjT>, CommonValue<LibObjT>>;
+    using Iterator = BorrowedObjectIterator<CommonArrayValue<LibObjT>>;
 
-    explicit CommonArrayValue(const _LibObjPtr libObjPtr) noexcept : _ThisCommonValue {libObjPtr}
+    explicit CommonArrayValue(const LibObjPtr libObjPtr) noexcept : _ThisCommonValue {libObjPtr}
     {
         BT_ASSERT_DBG(this->isArray());
     }
@@ -796,21 +951,20 @@ public:
     }
 
     template <typename OtherLibObjT>
-    CommonArrayValue<LibObjT>& operator=(const CommonArrayValue<OtherLibObjT> val) noexcept
+    CommonArrayValue<LibObjT> operator=(const CommonArrayValue<OtherLibObjT> val) noexcept
     {
         _ThisCommonValue::operator=(val);
         return *this;
     }
 
-    std::uint64_t length() const noexcept
+    CommonArrayValue<const bt_value> asConst() const noexcept
     {
-        return bt_value_array_get_length(this->libObjPtr());
+        return CommonArrayValue<const bt_value> {*this};
     }
 
-    /* Required by the `CommonIterator` template class */
-    std::uint64_t size() const noexcept
+    std::uint64_t length() const noexcept
     {
-        return this->length();
+        return bt_value_array_get_length(this->libObjPtr());
     }
 
     Iterator begin() const noexcept
@@ -836,7 +990,7 @@ public:
 
     void append(const Value val) const
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstArrayValue`.");
 
         const auto status = bt_value_array_append_element(this->libObjPtr(), val.libObjPtr());
 
@@ -845,7 +999,7 @@ public:
 
     void append(const bool rawVal) const
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstArrayValue`.");
 
         const auto status =
             bt_value_array_append_bool_element(this->libObjPtr(), static_cast<bt_bool>(rawVal));
@@ -855,7 +1009,7 @@ public:
 
     void append(const std::uint64_t rawVal) const
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstArrayValue`.");
 
         const auto status =
             bt_value_array_append_unsigned_integer_element(this->libObjPtr(), rawVal);
@@ -865,7 +1019,7 @@ public:
 
     void append(const std::int64_t rawVal) const
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstArrayValue`.");
 
         const auto status = bt_value_array_append_signed_integer_element(this->libObjPtr(), rawVal);
 
@@ -874,7 +1028,7 @@ public:
 
     void append(const double rawVal) const
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstArrayValue`.");
 
         const auto status = bt_value_array_append_real_element(this->libObjPtr(), rawVal);
 
@@ -883,14 +1037,14 @@ public:
 
     void append(const char * const rawVal) const
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstArrayValue`.");
 
         const auto status = bt_value_array_append_string_element(this->libObjPtr(), rawVal);
 
         this->_handleAppendLibStatus(status);
     }
 
-    void append(const std::string& rawVal) const
+    void append(const bt2c::CStringView rawVal) const
     {
         this->append(rawVal.data());
     }
@@ -928,7 +1082,7 @@ public:
         this->append(rawVal);
     }
 
-    void operator+=(const std::string& rawVal) const
+    void operator+=(const bt2c::CStringView rawVal) const
     {
         this->append(rawVal);
     }
@@ -974,7 +1128,7 @@ struct TypeDescr<ConstArrayValue> : public ArrayValueTypeDescr
  * First argument is the entry's key, second is its value.
  */
 template <typename ObjT>
-using CommonMapValueForEachUserFunc = std::function<void(const bpstd::string_view&, ObjT)>;
+using CommonMapValueForEachUserFunc = std::function<void(bt2c::CStringView, ObjT)>;
 
 /*
  * Template of a function to be passed to bt_value_map_foreach_entry()
@@ -984,7 +1138,7 @@ using CommonMapValueForEachUserFunc = std::function<void(const bpstd::string_vie
  * `CommonMapValueForEachUserFunc<ObjT>` (the user function to call).
  *
  * This function catches any exception which the user function throws
- * and returns the `ErrorStatus` value. If there's no execption, this
+ * and returns the `ErrorStatus` value. If there's no exception, this
  * function returns the `OkStatus` value.
  */
 template <typename ObjT, typename LibObjT, typename LibStatusT, int OkStatus, int ErrorStatus>
@@ -1075,13 +1229,13 @@ template <typename LibObjT>
 class CommonMapValue final : public CommonValue<LibObjT>
 {
 private:
-    using typename CommonValue<LibObjT>::_LibObjPtr;
     using typename CommonValue<LibObjT>::_ThisCommonValue;
 
 public:
+    using typename CommonValue<LibObjT>::LibObjPtr;
     using Shared = SharedValue<CommonMapValue<LibObjT>, LibObjT>;
 
-    explicit CommonMapValue(const _LibObjPtr libObjPtr) noexcept : _ThisCommonValue {libObjPtr}
+    explicit CommonMapValue(const LibObjPtr libObjPtr) noexcept : _ThisCommonValue {libObjPtr}
     {
         BT_ASSERT_DBG(this->isMap());
     }
@@ -1100,66 +1254,50 @@ public:
     }
 
     template <typename OtherLibObjT>
-    CommonMapValue<LibObjT>& operator=(const CommonMapValue<OtherLibObjT> val) noexcept
+    CommonMapValue<LibObjT> operator=(const CommonMapValue<OtherLibObjT> val) noexcept
     {
         _ThisCommonValue::operator=(val);
         return *this;
     }
 
-    std::uint64_t size() const noexcept
+    CommonMapValue<const bt_value> asConst() const noexcept
     {
-        return bt_value_map_get_size(this->libObjPtr());
+        return CommonMapValue<const bt_value> {*this};
     }
 
-    bool isEmpty() const noexcept
+    std::uint64_t length() const noexcept
     {
-        return this->size() == 0;
+        return bt_value_map_get_size(this->libObjPtr());
     }
 
-    nonstd::optional<CommonValue<LibObjT>> operator[](const char * const key) const noexcept
+    bool isEmpty() const noexcept
     {
-        const auto libObjPtr =
-            internal::CommonMapValueSpec<LibObjT>::entryByKey(this->libObjPtr(), key);
-
-        if (!libObjPtr) {
-            return nonstd::nullopt;
-        }
-
-        return CommonValue<LibObjT> {libObjPtr};
+        return this->length() == 0;
     }
 
-    nonstd::optional<CommonValue<LibObjT>> operator[](const std::string& key) const noexcept
+    OptionalBorrowedObject<CommonValue<LibObjT>>
+    operator[](const bt2c::CStringView key) const noexcept
     {
-        return (*this)[key.data()];
+        return internal::CommonMapValueSpec<LibObjT>::entryByKey(this->libObjPtr(), key);
     }
 
-    bool hasEntry(const char * const key) const noexcept
+    bool hasEntry(const bt2c::CStringView key) const noexcept
     {
         return static_cast<bool>(bt_value_map_has_entry(this->libObjPtr(), key));
     }
 
-    bool hasEntry(const std::string& key) const noexcept
-    {
-        return this->hasEntry(key.data());
-    }
-
-    void insert(const char * const key, const Value val) const
+    void insert(const bt2c::CStringView key, const Value val) const
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstMapValue`.");
 
         const auto status = bt_value_map_insert_entry(this->libObjPtr(), key, val.libObjPtr());
 
         this->_handleInsertLibStatus(status);
     }
 
-    void insert(const std::string& key, const Value val) const
-    {
-        this->insert(key.data(), val);
-    }
-
-    void insert(const char * const key, const bool rawVal) const
+    void insert(const bt2c::CStringView key, const bool rawVal) const
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstMapValue`.");
 
         const auto status =
             bt_value_map_insert_bool_entry(this->libObjPtr(), key, static_cast<bt_bool>(rawVal));
@@ -1167,29 +1305,18 @@ public:
         this->_handleInsertLibStatus(status);
     }
 
-    void insert(const std::string& key, const bool rawVal) const
+    void insert(const bt2c::CStringView key, const std::uint64_t rawVal) const
     {
-        this->insert(key.data(), rawVal);
-    }
-
-    void insert(const char * const key, const std::uint64_t rawVal) const
-    {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstMapValue`.");
 
         const auto status =
             bt_value_map_insert_unsigned_integer_entry(this->libObjPtr(), key, rawVal);
 
         this->_handleInsertLibStatus(status);
     }
-
-    void insert(const std::string& key, const std::uint64_t rawVal) const
+    void insert(const bt2c::CStringView key, const std::int64_t rawVal) const
     {
-        this->insert(key.data(), rawVal);
-    }
-
-    void insert(const char * const key, const std::int64_t rawVal) const
-    {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstMapValue`.");
 
         const auto status =
             bt_value_map_insert_signed_integer_entry(this->libObjPtr(), key, rawVal);
@@ -1197,53 +1324,31 @@ public:
         this->_handleInsertLibStatus(status);
     }
 
-    void insert(const std::string& key, const std::int64_t rawVal) const
-    {
-        this->insert(key.data(), rawVal);
-    }
-
-    void insert(const char * const key, const double rawVal) const
+    void insert(const bt2c::CStringView key, const double rawVal) const
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstMapValue`.");
 
         const auto status = bt_value_map_insert_real_entry(this->libObjPtr(), key, rawVal);
 
         this->_handleInsertLibStatus(status);
     }
 
-    void insert(const std::string& key, const double rawVal) const
-    {
-        this->insert(key.data(), rawVal);
-    }
-
-    void insert(const char * const key, const char * const rawVal) const
+    void insert(const bt2c::CStringView key, const char *rawVal) const
     {
-        static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+        static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstMapValue`.");
 
         const auto status = bt_value_map_insert_string_entry(this->libObjPtr(), key, rawVal);
 
         this->_handleInsertLibStatus(status);
     }
 
-    void insert(const char * const key, const std::string& rawVal) const
-    {
-        this->insert(key, rawVal.data());
-    }
-
-    void insert(const std::string& key, const char * const rawVal) const
-    {
-        this->insert(key.data(), rawVal);
-    }
-
-    void insert(const std::string& key, const std::string& rawVal) const
+    void insert(const bt2c::CStringView key, const bt2c::CStringView rawVal) const
     {
-        this->insert(key.data(), rawVal.data());
+        return this->insert(key, rawVal.data());
     }
 
-    CommonArrayValue<bt_value> insertEmptyArray(const char *key) const;
-    CommonArrayValue<bt_value> insertEmptyArray(const std::string& key) const;
-    CommonMapValue<bt_value> insertEmptyMap(const char *key) const;
-    CommonMapValue<bt_value> insertEmptyMap(const std::string& key) const;
+    CommonArrayValue<bt_value> insertEmptyArray(bt2c::CStringView key) const;
+    CommonMapValue<bt_value> insertEmptyMap(bt2c::CStringView key) const;
 
     void forEach(const internal::CommonMapValueForEachUserFunc<CommonValue<LibObjT>>& func) const
     {
@@ -1287,66 +1392,83 @@ struct TypeDescr<ConstMapValue> : public MapValueTypeDescr
 
 } /* namespace internal */
 
+template <typename LibObjT>
+ArrayValue CommonValue<LibObjT>::appendEmptyArray() const
+{
+    return this->asArray().appendEmptyArray();
+}
+
+template <typename LibObjT>
+MapValue CommonValue<LibObjT>::appendEmptyMap() const
+{
+    return this->asArray().appendEmptyMap();
+}
+
+template <typename LibObjT>
+ArrayValue CommonValue<LibObjT>::insertEmptyArray(const bt2c::CStringView key) const
+{
+    return this->asMap().insertEmptyArray(key);
+}
+
+template <typename LibObjT>
+MapValue CommonValue<LibObjT>::insertEmptyMap(const bt2c::CStringView key) const
+{
+    return this->asMap().insertEmptyMap(key);
+}
+
 template <typename LibObjT>
 CommonNullValue<LibObjT> CommonValue<LibObjT>::asNull() const noexcept
 {
     BT_ASSERT_DBG(this->isNull());
-    return CommonNullValue<LibObjT> {this->libObjPtr()};
+    return CommonNullValue<LibObjT> {};
 }
 
 template <typename LibObjT>
 CommonBoolValue<LibObjT> CommonValue<LibObjT>::asBool() const noexcept
 {
-    BT_ASSERT_DBG(this->isBool());
     return CommonBoolValue<LibObjT> {this->libObjPtr()};
 }
 
 template <typename LibObjT>
 CommonSignedIntegerValue<LibObjT> CommonValue<LibObjT>::asSignedInteger() const noexcept
 {
-    BT_ASSERT_DBG(this->isSignedInteger());
     return CommonSignedIntegerValue<LibObjT> {this->libObjPtr()};
 }
 
 template <typename LibObjT>
 CommonUnsignedIntegerValue<LibObjT> CommonValue<LibObjT>::asUnsignedInteger() const noexcept
 {
-    BT_ASSERT_DBG(this->isUnsignedInteger());
     return CommonUnsignedIntegerValue<LibObjT> {this->libObjPtr()};
 }
 
 template <typename LibObjT>
 CommonRealValue<LibObjT> CommonValue<LibObjT>::asReal() const noexcept
 {
-    BT_ASSERT_DBG(this->isReal());
     return CommonRealValue<LibObjT> {this->libObjPtr()};
 }
 
 template <typename LibObjT>
 CommonStringValue<LibObjT> CommonValue<LibObjT>::asString() const noexcept
 {
-    BT_ASSERT_DBG(this->isString());
     return CommonStringValue<LibObjT> {this->libObjPtr()};
 }
 
 template <typename LibObjT>
 CommonArrayValue<LibObjT> CommonValue<LibObjT>::asArray() const noexcept
 {
-    BT_ASSERT_DBG(this->isArray());
     return CommonArrayValue<LibObjT> {this->libObjPtr()};
 }
 
 template <typename LibObjT>
 CommonMapValue<LibObjT> CommonValue<LibObjT>::asMap() const noexcept
 {
-    BT_ASSERT_DBG(this->isMap());
     return CommonMapValue<LibObjT> {this->libObjPtr()};
 }
 
 template <typename LibObjT>
 ArrayValue CommonArrayValue<LibObjT>::appendEmptyArray() const
 {
-    static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+    static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstArrayValue`.");
 
     bt_value *libElemPtr;
     const auto status = bt_value_array_append_empty_array_element(this->libObjPtr(), &libElemPtr);
@@ -1358,7 +1480,7 @@ ArrayValue CommonArrayValue<LibObjT>::appendEmptyArray() const
 template <typename LibObjT>
 MapValue CommonArrayValue<LibObjT>::appendEmptyMap() const
 {
-    static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+    static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstArrayValue`.");
 
     bt_value *libElemPtr;
     const auto status = bt_value_array_append_empty_map_element(this->libObjPtr(), &libElemPtr);
@@ -1368,9 +1490,9 @@ MapValue CommonArrayValue<LibObjT>::appendEmptyMap() const
 }
 
 template <typename LibObjT>
-ArrayValue CommonMapValue<LibObjT>::insertEmptyArray(const char * const key) const
+ArrayValue CommonMapValue<LibObjT>::insertEmptyArray(const bt2c::CStringView key) const
 {
-    static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+    static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstMapValue`.");
 
     bt_value *libEntryPtr;
     const auto status = bt_value_map_insert_empty_array_entry(this->libObjPtr(), key, &libEntryPtr);
@@ -1380,15 +1502,9 @@ ArrayValue CommonMapValue<LibObjT>::insertEmptyArray(const char * const key) con
 }
 
 template <typename LibObjT>
-ArrayValue CommonMapValue<LibObjT>::insertEmptyArray(const std::string& key) const
-{
-    return this->insertEmptyArray(key.data());
-}
-
-template <typename LibObjT>
-MapValue CommonMapValue<LibObjT>::insertEmptyMap(const char * const key) const
+MapValue CommonMapValue<LibObjT>::insertEmptyMap(const bt2c::CStringView key) const
 {
-    static_assert(!std::is_const<LibObjT>::value, "`LibObjT` must NOT be `const`.");
+    static_assert(!std::is_const<LibObjT>::value, "Not available with `bt2::ConstMapValue`.");
 
     bt_value *libEntryPtr;
     const auto status = bt_value_map_insert_empty_map_entry(this->libObjPtr(), key, &libEntryPtr);
@@ -1397,12 +1513,6 @@ MapValue CommonMapValue<LibObjT>::insertEmptyMap(const char * const key) const
     return MapValue {libEntryPtr};
 }
 
-template <typename LibObjT>
-MapValue CommonMapValue<LibObjT>::insertEmptyMap(const std::string& key) const
-{
-    return this->insertEmptyMap(key.data());
-}
-
 inline BoolValue::Shared createValue(const bool rawVal)
 {
     return BoolValue::create(rawVal);
@@ -1428,7 +1538,7 @@ inline StringValue::Shared createValue(const char * const rawVal)
     return StringValue::create(rawVal);
 }
 
-inline StringValue::Shared createValue(const std::string& rawVal)
+inline StringValue::Shared createValue(const bt2c::CStringView rawVal)
 {
     return StringValue::create(rawVal);
 }