Struct mz_repr::row::RowArena

source ·
pub struct RowArena {
    inner: RefCell<Vec<Vec<u8>>>,
}
Expand description

RowArena is used to hold on to temporary Rows for functions like eval that need to create complex Datums but don’t have a Row to put them in yet.

Fields§

§inner: RefCell<Vec<Vec<u8>>>

Implementations§

Take ownership of bytes for the lifetime of the arena.

Take ownership of string for the lifetime of the arena.

Take ownership of row for the lifetime of the arena, returning a reference to the first datum in the row.

If we had an owned datum type, this method would be much clearer, and would be called push_owned_datum.

Equivalent to push_unary_row but returns a DatumNested rather than a Datum.

Convenience function to make a new Row containing a single datum, and take ownership of it for the lifetime of the arena

let arena = RowArena::new();
let datum = arena.make_datum(|packer| {
  packer.push_list(&[Datum::String("hello"), Datum::String("world")]);
});
assert_eq!(datum.unwrap_list().iter().collect::<Vec<_>>(), vec![Datum::String("hello"), Datum::String("world")]);

Convenience function identical to make_datum but instead returns a DatumNested.

Like RowArena::make_datum, but the provided closure can return an error.

Trait Implementations§

Formats the value using the given formatter. Read more
Returns the “default value” for a type. Read more

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

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Calls U::from(self).

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The type returned in the event of a conversion error.
Performs the conversion.
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Performs the conversion.
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