Struct PvString 

pub struct PvString(/* private fields */);

A wire string: a sequence of bytes that is not guaranteed to be valid UTF-8. Backs EpicsValue::String/StringArray and (in epics-pva-rs) ScalarValue::String/TypedScalarArray::String. See the module docs for why this is a byte newtype rather than String.

Implementations

impl PvString

pub fn new() -> PvString

An empty wire string.

pub fn from_bytes(bytes: impl Into<Vec<u8>>) -> PvString

Wrap raw bytes verbatim (the decode path: bytes straight off the wire).

pub fn as_bytes(&self) -> &[u8]

The logical bytes, layout-agnostic (an encoder applies CA’s 40-byte NUL padding or PVA’s size prefix; this is the unframed content).

pub fn into_bytes(self) -> Vec<u8>

Consume into the owned byte buffer.

pub fn as_str_lossy(&self) -> Cow<'_, str>

Lossy UTF-8 view for diagnostics / JSON / text comparisons where a faithful byte rendering is not required. Non-UTF-8 bytes become U+FFFD. For pvxs-faithful CLI output, escape Self::as_bytes byte-wise instead.

pub fn len(&self) -> usize

Number of logical bytes.

pub fn is_empty(&self) -> bool

True when the string carries no bytes.

Trait Implementations

impl AsRef<[u8]> for PvString

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for PvString

fn clone(&self) -> PvString

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PvString

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Quoted, escaped rendering of the lossy text view — keeps {:?} output readable (mirrors String’s Debug for the common ASCII/UTF-8 case).

impl Default for PvString

fn default() -> PvString

Returns the “default value” for a type.

impl Display for PvString

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Lossy text rendering for diagnostics and {}-formatting. This is the “diagnostic” policy (pvxs uses a byte-wise escaper for its CLI output; that lives in the epics-pva-rs format layer and consumes Self::as_bytes directly).

impl Eq for PvString

impl From<&String> for PvString

fn from(s: &String) -> PvString

Converts to this type from the input type.

impl From<&[u8]> for PvString

fn from(b: &[u8]) -> PvString

Converts to this type from the input type.

impl From<&str> for PvString

fn from(s: &str) -> PvString

Converts to this type from the input type.

impl From<Cow<'_, str>> for PvString

fn from(s: Cow<'_, str>) -> PvString

Converts to this type from the input type.

impl From<PvString> for Vec<u8>

fn from(s: PvString) -> Vec<u8>

Converts to this type from the input type.

impl From<String> for PvString

fn from(s: String) -> PvString

Converts to this type from the input type.

impl From<Vec<u8>> for PvString

fn from(b: Vec<u8>) -> PvString

Converts to this type from the input type.

impl Hash for PvString

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for PvString

fn cmp(&self, other: &PvString) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for PvString

fn eq(&self, other: &PvString) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<&str> for PvString

fn eq(&self, other: &&str) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<PvString> for str

fn eq(&self, other: &PvString) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<PvString> for &str

fn eq(&self, other: &PvString) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<String> for PvString

fn eq(&self, other: &String) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<str> for PvString

fn eq(&self, other: &str) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for PvString

fn partial_cmp(&self, other: &PvString) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for PvString