The sentinel value returned by search functions when no match is found.
Synopsis
Declared in <folly/FixedString.h>
constexpr std::size_t const& npos = detail::fixedstring::FixedStringBase::npos;Description
The type is const std::size_t& so that folly::npos has the same address in every translation unit. This avoids potential violations of the ODR.
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