The template instance std::numeric_limits<BloombergLP::bdldfp::Decimal128> is meaningfully specialized.
std::numeric_limits<BloombergLP::bdldfp::Decimal128>
Declared in <bdldfp_decimal.h>
<bdldfp_decimal.h>
static bool const is_specialized = true;
Also means that BloombergLP::bdldfp::Decimal128 is a numeric type.
BloombergLP::bdldfp::Decimal128