[−][src]Struct cxx::CxxString
Binding to C++ std::string
.
Invariants
As an invariant of this API and the static analysis of the cxx::bridge
macro, in Rust code we can never obtain a CxxString
by value. C++'s string
requires a move constructor and may hold internal pointers, which is not
compatible with Rust's move behavior. Instead in Rust code we will only ever
look at a CxxString through a reference or smart pointer, as in &CxxString
or UniquePtr<CxxString>
.
Implementations
impl CxxString
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pub fn len(&self) -> usize
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Returns the length of the string in bytes.
Matches the behavior of C++ std::string::size.
pub fn is_empty(&self) -> bool
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Returns true if self
has a length of zero bytes.
Matches the behavior of C++ std::string::empty.
pub fn as_bytes(&self) -> &[u8]
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Returns a byte slice of this string's contents.
pub fn as_ptr(&self) -> *const u8
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Produces a pointer to the first character of the string.
Matches the behavior of C++ std::string::data.
Note that the return type may look like const char *
but is not a
const char *
in the typical C sense, as C++ strings may contain
internal null bytes. As such, the returned pointer only makes sense as a
string in combination with the length returned by len()
.
pub fn to_str(&self) -> Result<&str, Utf8Error>
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Validates that the C++ string contains UTF-8 data and produces a view of it as a Rust &str, otherwise an error.
pub fn to_string_lossy(&self) -> Cow<'_, str>
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If the contents of the C++ string are valid UTF-8, this function returns a view as a Cow::Borrowed &str. Otherwise replaces any invalid UTF-8 sequences with the U+FFFD replacement character and returns a Cow::Owned String.
Trait Implementations
impl Debug for CxxString
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impl Display for CxxString
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impl PartialEq<CxxString> for CxxString
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impl PartialEq<CxxString> for str
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impl PartialEq<str> for CxxString
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Auto Trait Implementations
impl RefUnwindSafe for CxxString
impl Send for CxxString
impl Sync for CxxString
impl Unpin for CxxString
impl UnwindSafe for CxxString
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,