Struct diesel::serialize::Output

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pub struct Output<'a, 'b, DB>where
    DB: Backend,
    DB::MetadataLookup: 'a,{ /* private fields */ }
Expand description

Wraps a buffer to be written by ToSql with additional backend specific utilities.

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impl<'a, 'b, DB: Backend> Output<'a, 'b, DB>

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pub fn new( out: <BindCollector<'a, DB> as BindCollector<'a, DB>>::Buffer, metadata_lookup: &'b mut DB::MetadataLookup ) -> Self

Construct a new Output

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pub fn into_inner( self ) -> <BindCollector<'a, DB> as BindCollector<'a, DB>>::Buffer

Consume the current Output structure to access the inner buffer type

This function is only useful for people implementing their own Backend.

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pub fn metadata_lookup(&mut self) -> &mut DB::MetadataLookup

Returns the backend’s mechanism for dynamically looking up type metadata at runtime, if relevant for the given backend.

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pub fn set_value<V>(&mut self, value: V)where V: Into<<BindCollector<'a, DB> as BindCollector<'a, DB>>::Buffer>,

Set the inner buffer to a specific value

Checkout the documentation of the type of BindCollector::Buffer for your specific backend for supported types.

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impl<'a, 'b, DB: Backend<BindCollector = RawBytesBindCollector<DB>>> Output<'a, 'b, DB>

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pub fn reborrow<'c>(&'c mut self) -> Output<'c, 'c, DB> where 'a: 'c,

Call this method whenever you pass an instance of Output<DB> by value.

Effectively copies self, with a narrower lifetime. When passing a reference or a mutable reference, this is normally done by rust implicitly. This is why you can pass &mut Foo to multiple functions, even though mutable references are not Copy. However, this is only done implicitly for references. For structs with lifetimes it must be done explicitly. This method matches the semantics of what Rust would do implicitly if you were passing a mutable reference

Trait Implementations§

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impl<'a, 'b, DB> Debug for Output<'a, 'b, DB>where <<DB as HasBindCollector<'a>>::BindCollector as BindCollector<'a, DB>>::Buffer: Debug, DB: Backend,

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

Formats the value using the given formatter. Read more
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impl<'a, 'b, DB: Backend<BindCollector = RawBytesBindCollector<DB>>> Write for Output<'a, 'b, DB>

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fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written. Read more
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fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
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fn write_all(&mut self, buf: &[u8]) -> Result<()>

Attempts to write an entire buffer into this writer. Read more
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fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<()>

Writes a formatted string into this writer, returning any error encountered. Read more
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fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers. Read more
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fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Writer has an efficient write_vectored implementation. Read more
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fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)
Attempts to write multiple buffers into this writer. Read more
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fn by_ref(&mut self) -> &mut Selfwhere Self: Sized,

Creates a “by reference” adapter for this instance of Write. Read more

Auto Trait Implementations§

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impl<'a, 'b, DB> RefUnwindSafe for Output<'a, 'b, DB>where <<DB as HasBindCollector<'a>>::BindCollector as BindCollector<'a, DB>>::Buffer: RefUnwindSafe, <DB as TypeMetadata>::MetadataLookup: RefUnwindSafe,

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impl<'a, 'b, DB> Send for Output<'a, 'b, DB>where <<DB as HasBindCollector<'a>>::BindCollector as BindCollector<'a, DB>>::Buffer: Send, <DB as TypeMetadata>::MetadataLookup: Send,

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impl<'a, 'b, DB> Sync for Output<'a, 'b, DB>where <<DB as HasBindCollector<'a>>::BindCollector as BindCollector<'a, DB>>::Buffer: Sync, <DB as TypeMetadata>::MetadataLookup: Sync,

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impl<'a, 'b, DB> Unpin for Output<'a, 'b, DB>where <<DB as HasBindCollector<'a>>::BindCollector as BindCollector<'a, DB>>::Buffer: Unpin,

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impl<'a, 'b, DB> !UnwindSafe for Output<'a, 'b, DB>

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoSql for T

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fn into_sql<T>(self) -> AsExprOf<Self, T>where Self: AsExpression<T> + Sized, T: SqlType + TypedExpressionType,

Convert self to an expression for Diesel’s query builder. Read more
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fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T>where &'a Self: AsExpression<T>, T: SqlType + TypedExpressionType,

Convert &self to an expression for Diesel’s query builder. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<W> WriteBytesExt for Wwhere W: Write + ?Sized,

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fn write_u8(&mut self, n: u8) -> Result<(), Error>

Writes an unsigned 8 bit integer to the underlying writer. Read more
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fn write_i8(&mut self, n: i8) -> Result<(), Error>

Writes a signed 8 bit integer to the underlying writer. Read more
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fn write_u16<T>(&mut self, n: u16) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 16 bit integer to the underlying writer. Read more
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fn write_i16<T>(&mut self, n: i16) -> Result<(), Error>where T: ByteOrder,

Writes a signed 16 bit integer to the underlying writer. Read more
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fn write_u24<T>(&mut self, n: u32) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 24 bit integer to the underlying writer. Read more
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fn write_i24<T>(&mut self, n: i32) -> Result<(), Error>where T: ByteOrder,

Writes a signed 24 bit integer to the underlying writer. Read more
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fn write_u32<T>(&mut self, n: u32) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 32 bit integer to the underlying writer. Read more
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fn write_i32<T>(&mut self, n: i32) -> Result<(), Error>where T: ByteOrder,

Writes a signed 32 bit integer to the underlying writer. Read more
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fn write_u48<T>(&mut self, n: u64) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 48 bit integer to the underlying writer. Read more
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fn write_i48<T>(&mut self, n: i64) -> Result<(), Error>where T: ByteOrder,

Writes a signed 48 bit integer to the underlying writer. Read more
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fn write_u64<T>(&mut self, n: u64) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 64 bit integer to the underlying writer. Read more
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fn write_i64<T>(&mut self, n: i64) -> Result<(), Error>where T: ByteOrder,

Writes a signed 64 bit integer to the underlying writer. Read more
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fn write_u128<T>(&mut self, n: u128) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned 128 bit integer to the underlying writer.
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fn write_i128<T>(&mut self, n: i128) -> Result<(), Error>where T: ByteOrder,

Writes a signed 128 bit integer to the underlying writer.
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fn write_uint<T>(&mut self, n: u64, nbytes: usize) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned n-bytes integer to the underlying writer. Read more
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fn write_int<T>(&mut self, n: i64, nbytes: usize) -> Result<(), Error>where T: ByteOrder,

Writes a signed n-bytes integer to the underlying writer. Read more
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fn write_uint128<T>(&mut self, n: u128, nbytes: usize) -> Result<(), Error>where T: ByteOrder,

Writes an unsigned n-bytes integer to the underlying writer. Read more
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fn write_int128<T>(&mut self, n: i128, nbytes: usize) -> Result<(), Error>where T: ByteOrder,

Writes a signed n-bytes integer to the underlying writer. Read more
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fn write_f32<T>(&mut self, n: f32) -> Result<(), Error>where T: ByteOrder,

Writes a IEEE754 single-precision (4 bytes) floating point number to the underlying writer. Read more
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fn write_f64<T>(&mut self, n: f64) -> Result<(), Error>where T: ByteOrder,

Writes a IEEE754 double-precision (8 bytes) floating point number to the underlying writer. Read more