Struct sqlx::types::uuid::adapter::UrnRef

pub struct UrnRef<'a>(_);

An adaptor for formatting an Uuid as a URN string.

Takes a reference of the Uuid.

Implementations

impl<'a> UrnRef<'a>

pub const LENGTH: usize

The length of a URN Uuid string.

pub const fn from_uuid_ref(uuid: &'a Uuid) -> UrnRef<'a>

Creates a UrnRef from a Uuid reference.

pub fn encode_lower(&self, buffer: &'buf mut [u8]) -> &'buf mut str

Writes the Uuid as a lower-case URN string to buffer, and returns the subslice of the buffer that contains the encoded UUID.

This is slightly more efficient than using the formatting infrastructure as it avoids virtual calls, and may avoid double buffering.

Panics

Panics if the buffer is not large enough: it must have length at least LENGTH. Uuid::encode_buffer can be used to get a sufficiently-large temporary buffer.

Examples

use uuid::Uuid;

fn main() -> Result<(), uuid::Error> {
    let uuid = Uuid::parse_str("936DA01f9abd4d9d80c702af85c822a8")?;

    // the encoded portion is returned
    assert_eq!(
        uuid.to_urn().encode_lower(&mut Uuid::encode_buffer()),
        "urn:uuid:936da01f-9abd-4d9d-80c7-02af85c822a8"
    );

    // the buffer is mutated directly, and trailing contents remains
    let mut buf = [b'!'; 49];
    uuid.to_urn().encode_lower(&mut buf);
    assert_eq!(
        uuid.to_urn().encode_lower(&mut buf),
        "urn:uuid:936da01f-9abd-4d9d-80c7-02af85c822a8"
    );
    assert_eq!(
        &buf as &[_],
        b"urn:uuid:936da01f-9abd-4d9d-80c7-02af85c822a8!!!!" as &[_]
    );

    Ok(())
}

*/

pub fn encode_upper(&self, buffer: &'buf mut [u8]) -> &'buf mut str

Writes the Uuid as an upper-case URN string to buffer, and returns the subslice of the buffer that contains the encoded UUID.

This is slightly more efficient than using the formatting infrastructure as it avoids virtual calls, and may avoid double buffering.

Panics

Panics if the buffer is not large enough: it must have length at least LENGTH. Uuid::encode_buffer can be used to get a sufficiently-large temporary buffer.

Examples

use uuid::Uuid;

fn main() -> Result<(), uuid::Error> {
    let uuid = Uuid::parse_str("936da01f9abd4d9d80c702af85c822a8")?;

    // the encoded portion is returned
    assert_eq!(
        uuid.to_urn().encode_upper(&mut Uuid::encode_buffer()),
        "urn:uuid:936DA01F-9ABD-4D9D-80C7-02AF85C822A8"
    );

    // the buffer is mutated directly, and trailing contents remains
    let mut buf = [b'!'; 49];
    assert_eq!(
        uuid.to_urn().encode_upper(&mut buf),
        "urn:uuid:936DA01F-9ABD-4D9D-80C7-02AF85C822A8"
    );
    assert_eq!(
        &buf as &[_],
        b"urn:uuid:936DA01F-9ABD-4D9D-80C7-02AF85C822A8!!!!" as &[_]
    );

    Ok(())
}

*/

Trait Implementations

impl<'a> Clone for UrnRef<'a>

pub fn clone(&self) -> UrnRef<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for UrnRef<'a>

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

Formats the value using the given formatter.

impl<'a> Display for UrnRef<'a>

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

Formats the value using the given formatter.

impl<'a> From<&'a Uuid> for UrnRef<'a>

pub fn from(f: &'a Uuid) -> UrnRef<'a>

Performs the conversion.

impl<'a> Hash for UrnRef<'a>

pub 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, 

Feeds a slice of this type into the given Hasher.

impl<'a> LowerHex for UrnRef<'a>

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

Formats the value using the given formatter.

impl<'a> Ord for UrnRef<'a>

pub fn cmp(&self, other: &UrnRef<'a>) -> Ordering

This method returns an Ordering between self and other.

#[must_use]

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

Compares and returns the maximum of two values.

#[must_use]

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

Compares and returns the minimum of two values.

#[must_use]

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

Restrict a value to a certain interval.

impl<'a> PartialEq<UrnRef<'a>> for UrnRef<'a>

pub fn eq(&self, other: &UrnRef<'a>) -> bool

This method tests for self and other values to be equal, and is used by ==.

pub fn ne(&self, other: &UrnRef<'a>) -> bool

This method tests for !=.

impl<'a> PartialOrd<UrnRef<'a>> for UrnRef<'a>

pub fn partial_cmp(&self, other: &UrnRef<'a>) -> Option<Ordering>

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

#[must_use]

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

This method tests less than (for self and other) and is used by the < operator.

#[must_use]

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

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

#[must_use]

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

This method tests greater than (for self and other) and is used by the > operator.

#[must_use]

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

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

impl<'a> UpperHex for UrnRef<'a>

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

Formats the value using the given formatter.

impl<'a> Copy for UrnRef<'a>

impl<'a> Eq for UrnRef<'a>

impl<'a> StructuralEq for UrnRef<'a>

impl<'a> StructuralPartialEq for UrnRef<'a>