`STL.natvis`: `ranges::view_interface` doesn't always have `size()`

[StephanTLavavej]

STL/stl/inc/xutility

Lines 3766 to 3779 in ef1d621

	_NODISCARD constexpr auto size()
	requires forward_range<_Derived> && sized_sentinel_for<sentinel_t<_Derived>, iterator_t<_Derived>>
	{
	auto& _Self = _Cast();
	return _STD _To_unsigned_like(_RANGES end(_Self) - _RANGES begin(_Self));
	}
	_NODISCARD constexpr auto size() const
	requires forward_range<const _Derived>
	&& sized_sentinel_for<sentinel_t<const _Derived>, iterator_t<const _Derived>>
	{
	auto& _Self = _Cast();
	return _STD _To_unsigned_like(_RANGES end(_Self) - _RANGES begin(_Self));
	}

STL/stl/debugger/STL.natvis

Lines 2004 to 2012 in ef1d621

	<Type Name="std::ranges::view_interface&lt;*&gt;">
	<DisplayString>{{ size={size()} }}</DisplayString>
	<Expand>
	<Item Optional="true" Name="empty">empty()</Item>
	<Item Optional="true" Name="front">front()</Item>
	<Item Optional="true" Name="back">back()</Item>
	<Item Optional="true" Name="data">data()</Item>
	</Expand>
	</Type>

Reported by Xiang Fan (@xiangfan-ms):

The 'size' member function doesn't always exist in the specialization. When this happens, the entry will be ignored by the debugger.

Present since this visualizer was added by #2191 on 2022-07-11 in VS 2022 17.4.