Struct paho_mqtt::string_collection::StringCollection

pub struct StringCollection { /* fields omitted */ }

A collection of C-compatible (NUL-terminated) strings that is useful with C API's that require an array of strings, normally specified as: const char* arr[] or const char** arr

Methods

impl StringCollection

fn new(coll: &Vec<String>) -> StringCollection

Creates a StringCollection from a vector of strings.

fn len(&self) -> usize

Gets the number of strings in the collection.

fn as_c_arr_ptr(&self) -> *const *const c_char

Gets the collection as a pointer to C string pointers. This returns a pointer that can be sent to a C API that takes a pointer to an array of char pointers, like const char* arr[] This function is inherently unsafe. The pointer it returns is only valid while the collection remains unmodified. In general, it should be requested when needed and not stored for future use.

Trait Implementations

impl Debug for StringCollection

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for StringCollection

fn default() -> StringCollection

Returns the "default value" for a type.

impl Clone for StringCollection

fn clone(&self) -> StringCollection

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.