[cpp.predefined] - C++20 → C++23

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@@ -4,13 +4,20 @@ The following macro names shall be defined by the implementation:
 - **`__cplusplus`**
 The integer literal `202302L`.
-[*Note 1*: It is intended that future versions of this International
-Standard will replace the value of this macro with a greater
-value. — *end note*]
 - **`__DATE__`**
 The date of translation of the source file: a character string literal
 of the form `"Mmm dd yyyy"`, where the names of the months are the same
@@ -30,89 +37,121 @@ The presumed line number (within the current source file) of the current
 source line (an integer literal).[^10]
 - **`__STDC_HOSTED__`**
 The integer literal `1` if the implementation is a hosted implementation
-or the integer literal `0` if it is not.
 - **`__STDCPP_DEFAULT_NEW_ALIGNMENT__`**
 An integer literal of type `std::size_t` whose value is the alignment
 guaranteed by a call to `operator new(std::size_t)` or
 `operator new[](std::size_t)`.
-[*Note 2*: Larger alignments will be passed to
 `operator new(std::size_t, std::align_val_t)`, etc.
 [[expr.new]]. — *end note*]
 - **`__TIME__`**
 The time of translation of the source file: a character string literal
 of the form `"hh:mm:ss"` as in the time generated by the `asctime`
 function. If the time of translation is not available, an
 *implementation-defined* valid time shall be supplied.
-- **The names listed in [[cpp.predefined.ft]].**
-The macros defined in [[cpp.predefined.ft]] shall be defined to the
-corresponding integer literal.
-[*Note 3*: Future versions of this International Standard might replace
-the values of these macros with greater values. — *end note*]
 **Table: Feature-test macros** <a id="cpp.predefined.ft">[cpp.predefined.ft]</a>
 | Macro name                              | Value     |
 | --------------------------------------- | --------- |
 | `__cpp_aggregate_bases`                 | `201603L` |
 | `__cpp_aggregate_nsdmi`                 | `201304L` |
 | `__cpp_aggregate_paren_init`            | `201902L` |
 | `__cpp_alias_templates`                 | `200704L` |
 | `__cpp_aligned_new`                     | `201606L` |
 | `__cpp_attributes`                      | `200809L` |
 | `__cpp_binary_literals`                 | `201304L` |
 | `__cpp_capture_star_this`               | `201603L` |
-| `__cpp_char8_t`                         | `201811L` |
-| `__cpp_concepts`                        | `201907L` |
 | `__cpp_conditional_explicit`            | `201806L` |
-| `__cpp_constexpr`                       | `201907L` |
 | `__cpp_constexpr_dynamic_alloc`         | `201907L` |
 | `__cpp_constexpr_in_decltype`           | `201711L` |
-| `__cpp_consteval`                       | `201811L` |
 | `__cpp_constinit`                       | `201907L` |
 | `__cpp_decltype`                        | `200707L` |
 | `__cpp_decltype_auto`                   | `201304L` |
 | `__cpp_deduction_guides`                | `201907L` |
 | `__cpp_delegating_constructors`         | `200604L` |
 | `__cpp_designated_initializers`         | `201707L` |
 | `__cpp_enumerator_attributes`           | `201411L` |
 | `__cpp_fold_expressions`                | `201603L` |
 | `__cpp_generic_lambdas`                 | `201707L` |
 | `__cpp_guaranteed_copy_elision`         | `201606L` |
 | `__cpp_hex_float`                       | `201603L` |
 | `__cpp_if_constexpr`                    | `201606L` |
 | `__cpp_impl_coroutine`                  | `201902L` |
 | `__cpp_impl_destroying_delete`          | `201806L` |
 | `__cpp_impl_three_way_comparison`       | `201907L` |
 | `__cpp_inheriting_constructors`         | `201511L` |
 | `__cpp_init_captures`                   | `201803L` |
 | `__cpp_initializer_lists`               | `200806L` |
 | `__cpp_inline_variables`                | `201606L` |
 | `__cpp_lambdas`                         | `200907L` |
 | `__cpp_modules`                         | `201907L` |
 | `__cpp_namespace_attributes`            | `201411L` |
 | `__cpp_noexcept_function_type`          | `201510L` |
 | `__cpp_nontype_template_args`           | `201911L` |
 | `__cpp_nontype_template_parameter_auto` | `201606L` |
 | `__cpp_nsdmi`                           | `200809L` |
-| `__cpp_range_based_for`                 | `201603L` |
 | `__cpp_raw_strings`                     | `200710L` |
 | `__cpp_ref_qualifiers`                  | `200710L` |
 | `__cpp_return_type_deduction`           | `201304L` |
 | `__cpp_rvalue_references`               | `200610L` |
 | `__cpp_sized_deallocation`              | `201309L` |
 | `__cpp_static_assert`                   | `201411L` |
 | `__cpp_structured_bindings`             | `201606L` |
 | `__cpp_template_template_args`          | `201611L` |
 | `__cpp_threadsafe_static_init`          | `200806L` |
 | `__cpp_unicode_characters`              | `200704L` |
 | `__cpp_unicode_literals`                | `200710L` |
@@ -143,22 +182,13 @@ character literal.
 Whether \_\_STDC_VERSION\_\_ is predefined and if so, what its value is,
 are *implementation-defined*.
 - **`__STDC_ISO_10646__`**
-An integer literal of the form `yyyymmL` (for example, `199712L`). If
-this symbol is defined, then every character in the Unicode required
-set, when stored in an object of type `wchar_t`, has the same value as
-the code point of that character. The *Unicode required set* consists of
-all the characters that are defined by ISO/IEC 10646, along with all
-amendments and technical corrigenda as of the specified year and month.
-- **`__STDCPP_STRICT_POINTER_SAFETY__`**
-Defined, and has the value integer literal 1, if and only if the
-implementation has strict pointer safety
-[[basic.stc.dynamic.safety]].
 - **`__STDCPP_THREADS__`**
 Defined, and has the value integer literal 1, if and only if a program
 can have more than one thread of execution [[intro.multithread]].

 - **`__cplusplus`**
 The integer literal `202302L`.
+[*Note 1*: Future revisions of C++ will replace the value of this macro
+with a greater value. — *end note*]
+- **The names listed in [[cpp.predefined.ft]].**
+The macros defined in [[cpp.predefined.ft]] shall be defined to the
+corresponding integer literal.
+[*Note 2*: Future revisions of C++ might replace the values of these
+macros with greater values. — *end note*]
 - **`__DATE__`**
 The date of translation of the source file: a character string literal
 of the form `"Mmm dd yyyy"`, where the names of the months are the same
 source line (an integer literal).[^10]
 - **`__STDC_HOSTED__`**
 The integer literal `1` if the implementation is a hosted implementation
+or the integer literal `0` if it is a freestanding implementation
+[[intro.compliance]].
 - **`__STDCPP_DEFAULT_NEW_ALIGNMENT__`**
 An integer literal of type `std::size_t` whose value is the alignment
 guaranteed by a call to `operator new(std::size_t)` or
 `operator new[](std::size_t)`.
+[*Note 3*: Larger alignments will be passed to
 `operator new(std::size_t, std::align_val_t)`, etc.
 [[expr.new]]. — *end note*]
+- **`__STDCPP_FLOAT16_T__`**
+Defined as the integer literal `1` if and only if the implementation
+supports the ISO/IEC/IEEE 60559 floating-point interchange format
+binary16 as an extended floating-point type [[basic.extended.fp]].
+- **`__STDCPP_FLOAT32_T__`**
+Defined as the integer literal `1` if and only if the implementation
+supports the ISO/IEC/IEEE 60559 floating-point interchange format
+binary32 as an extended floating-point type.
+- **`__STDCPP_FLOAT64_T__`**
+Defined as the integer literal `1` if and only if the implementation
+supports the ISO/IEC/IEEE 60559 floating-point interchange format
+binary64 as an extended floating-point type.
+- **`__STDCPP_FLOAT128_T__`**
+Defined as the integer literal `1` if and only if the implementation
+supports the ISO/IEC/IEEE 60559 floating-point interchange format
+binary128 as an extended floating-point type.
+- **`__STDCPP_BFLOAT16_T__`**
+Defined as the integer literal `1` if and only if the implementation
+supports an extended floating-point type with the properties of the
+\*typedef-name\* `std::bfloat16_t` as described in
+[[basic.extended.fp]].
 - **`__TIME__`**
 The time of translation of the source file: a character string literal
 of the form `"hh:mm:ss"` as in the time generated by the `asctime`
 function. If the time of translation is not available, an
 *implementation-defined* valid time shall be supplied.
 **Table: Feature-test macros** <a id="cpp.predefined.ft">[cpp.predefined.ft]</a>
 | Macro name                              | Value     |
 | --------------------------------------- | --------- |
 | `__cpp_aggregate_bases`                 | `201603L` |
 | `__cpp_aggregate_nsdmi`                 | `201304L` |
 | `__cpp_aggregate_paren_init`            | `201902L` |
 | `__cpp_alias_templates`                 | `200704L` |
 | `__cpp_aligned_new`                     | `201606L` |
 | `__cpp_attributes`                      | `200809L` |
+| `__cpp_auto_cast`                       | `202110L` |
 | `__cpp_binary_literals`                 | `201304L` |
 | `__cpp_capture_star_this`               | `201603L` |
+| `__cpp_char8_t`                         | `202207L` |
+| `__cpp_concepts`                        | `202002L` |
 | `__cpp_conditional_explicit`            | `201806L` |
+| `__cpp_constexpr`                       | `202211L` |
 | `__cpp_constexpr_dynamic_alloc`         | `201907L` |
 | `__cpp_constexpr_in_decltype`           | `201711L` |
+| `__cpp_consteval`                       | `202211L` |
 | `__cpp_constinit`                       | `201907L` |
 | `__cpp_decltype`                        | `200707L` |
 | `__cpp_decltype_auto`                   | `201304L` |
 | `__cpp_deduction_guides`                | `201907L` |
 | `__cpp_delegating_constructors`         | `200604L` |
 | `__cpp_designated_initializers`         | `201707L` |
 | `__cpp_enumerator_attributes`           | `201411L` |
+| `__cpp_explicit_this_parameter`         | `202110L` |
 | `__cpp_fold_expressions`                | `201603L` |
 | `__cpp_generic_lambdas`                 | `201707L` |
 | `__cpp_guaranteed_copy_elision`         | `201606L` |
 | `__cpp_hex_float`                       | `201603L` |
+| `__cpp_if_consteval`                    | `202106L` |
 | `__cpp_if_constexpr`                    | `201606L` |
 | `__cpp_impl_coroutine`                  | `201902L` |
 | `__cpp_impl_destroying_delete`          | `201806L` |
 | `__cpp_impl_three_way_comparison`       | `201907L` |
+| `__cpp_implicit_move`                   | `202207L` |
 | `__cpp_inheriting_constructors`         | `201511L` |
 | `__cpp_init_captures`                   | `201803L` |
 | `__cpp_initializer_lists`               | `200806L` |
 | `__cpp_inline_variables`                | `201606L` |
 | `__cpp_lambdas`                         | `200907L` |
 | `__cpp_modules`                         | `201907L` |
+| `__cpp_multidimensional_subscript`      | `202211L` |
+| `__cpp_named_character_escapes`         | `202207L` |
 | `__cpp_namespace_attributes`            | `201411L` |
 | `__cpp_noexcept_function_type`          | `201510L` |
 | `__cpp_nontype_template_args`           | `201911L` |
 | `__cpp_nontype_template_parameter_auto` | `201606L` |
 | `__cpp_nsdmi`                           | `200809L` |
+| `__cpp_range_based_for`                 | `202211L` |
 | `__cpp_raw_strings`                     | `200710L` |
 | `__cpp_ref_qualifiers`                  | `200710L` |
 | `__cpp_return_type_deduction`           | `201304L` |
 | `__cpp_rvalue_references`               | `200610L` |
+| `__cpp_size_t_suffix`                   | `202011L` |
 | `__cpp_sized_deallocation`              | `201309L` |
 | `__cpp_static_assert`                   | `201411L` |
+| `__cpp_static_call_operator`            | `202207L` |
 | `__cpp_structured_bindings`             | `201606L` |
 | `__cpp_template_template_args`          | `201611L` |
 | `__cpp_threadsafe_static_init`          | `200806L` |
 | `__cpp_unicode_characters`              | `200704L` |
 | `__cpp_unicode_literals`                | `200710L` |
 Whether \_\_STDC_VERSION\_\_ is predefined and if so, what its value is,
 are *implementation-defined*.
 - **`__STDC_ISO_10646__`**
+An integer literal of the form `yyyymmL` (for example, `199712L`).
+Whether \_\_STDC_ISO_10646\_\_ is predefined and if so, what its value
+is, are *implementation-defined*.
 - **`__STDCPP_THREADS__`**
 Defined, and has the value integer literal 1, if and only if a program
 can have more than one thread of execution [[intro.multithread]].

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