Struct ArgList

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pub struct ArgList<'a, S: UdfState>(/* private fields */);
Expand description

A collection of SQL arguments

This is rusty wrapper around SQL’s UDF_ARGS struct, providing methods to easily work with arguments.

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impl<'a, S: UdfState> ArgList<'a, S>

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pub fn as_vec(&'a self) -> Vec<SqlArg<'a, S>>

Create a vector of arguments for easy use

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pub fn iter(&'a self) -> Iter<'a, S>

Construct an iterator over arguments

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pub fn is_empty(&self) -> bool

Return true if there are no arguments

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pub fn len(&self) -> usize

Get the number of arguments

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pub fn get(&'a self, index: usize) -> Option<SqlArg<'a, S>>

Safely get an argument at a given index. It it is not available, None will be returned.

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impl<'a, S: UdfState> Debug for ArgList<'a, S>

Derived formatting is a bit ugly, so we clean it up by using the Vec format.

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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, S: UdfState> IntoIterator for &'a ArgList<'a, S>

Trait for being able to iterate arguments

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fn into_iter(self) -> Self::IntoIter

Construct a new

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type Item = SqlArg<'a, S>

The type of the elements being iterated over.
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type IntoIter = Iter<'a, S>

Which kind of iterator are we turning this into?

Auto Trait Implementations§

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impl<'a, S> !Freeze for ArgList<'a, S>

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impl<'a, S> !RefUnwindSafe for ArgList<'a, S>

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impl<'a, S> !Send for ArgList<'a, S>

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impl<'a, S> !Sync for ArgList<'a, S>

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impl<'a, S> Unpin for ArgList<'a, S>

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impl<'a, S> UnwindSafe for ArgList<'a, S>
where S: RefUnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where 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 T
where 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 T
where 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 T
where 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, U> TryFrom<U> for T
where 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 T
where 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.