[#mp_units-utility-detail-is_value_preserving_v]
= xref:mp_units.adoc[mp_units]::xref:mp_units/utility.adoc[utility]::xref:mp_units/utility/detail.adoc[detail]::is_value_preserving_v
:relfileprefix: ../../../
:mrdocs:

== Synopsis

Declared in `<mp‐units/utility/safe_int.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    typename From,
    typename To>
inline constexpr bool is_value_preserving_v = [] {
  if constexpr (integral<underlying_int_type_t<From>> && integral<underlying_int_type_t<To>>)
    return is_value_preserving_int_v<From, To>;
  else
    return false;
}();
----


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