Here is a list of all documented namespace members with links to the namespaces they belong to:

### - i -

- ifstream : booster::nowide
- intrusive_ptr_add_ref() : booster
- intrusive_ptr_release() : booster
- invalid() : booster::locale::period , booster::locale::period::marks
- invalid_endpoint : booster::aio::aio_error
- io_handler : booster::aio
- is_array : cppcms::json
- is_ascii_compatible() : cppcms::encoding
- is_boolean : cppcms::json
- is_null : cppcms::json
- is_number : cppcms::json
- is_object : cppcms::json
- is_string : cppcms::json
- is_undefined : cppcms::json
- is_valid_codepoint() : booster::locale::utf