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boost::urls::grammar::string_view_base::find_first_not_of

Return the position of the first non-match

constexpr
size_type
find_first_not_of(
    core::string_view str,
    size_type pos = 0) const noexcept;

constexpr
size_type
find_first_not_of(
    char c,
    size_type pos = 0) const noexcept;

constexpr
size_type
find_first_not_of(
    char const* s,
    size_type pos,
    size_type n) const noexcept;

constexpr
size_type
find_first_not_of(
    char const* s,
    size_type pos = 0) const noexcept;

See core::string_view::find_first_not_of