Struct rsfbclient::Column

pub struct Column {
    pub value: Option<ColumnType>,
    pub name: String,
}

Fields

value: Option<ColumnType>

name: String

Implementations

impl Column

pub fn new(name: String, value: Option<ColumnType>) -> Column

Methods from Deref<Target = Option<ColumnType>>

#[must_use = "if you intended to assert that this has a value, consider `.unwrap()` instead"]pub const fn is_some(&self) -> bool

Returns true if the option is a Some value.

Examples

let x: Option<u32> = Some(2);
assert_eq!(x.is_some(), true);

let x: Option<u32> = None;
assert_eq!(x.is_some(), false);

#[must_use = "if you intended to assert that this doesn't have a value, consider \ `.and_then(|| panic!(\"`Option` had a value when expected `None`\"))` instead"]pub const fn is_none(&self) -> bool

Returns true if the option is a None value.

Examples

let x: Option<u32> = Some(2);
assert_eq!(x.is_none(), false);

let x: Option<u32> = None;
assert_eq!(x.is_none(), true);

#[must_use]pub fn contains<U>(&self, x: &U) -> bool where
    U: PartialEq<T>, 

🔬 This is a nightly-only experimental API. (option_result_contains)

Returns true if the option is a Some value containing the given value.

Examples

#![feature(option_result_contains)]

let x: Option<u32> = Some(2);
assert_eq!(x.contains(&2), true);

let x: Option<u32> = Some(3);
assert_eq!(x.contains(&2), false);

let x: Option<u32> = None;
assert_eq!(x.contains(&2), false);

pub const fn as_ref(&self) -> Option<&T>

Converts from &Option<T> to Option<&T>.

Examples

Converts an Option<String> into an Option<usize>, preserving the original. The map method takes the self argument by value, consuming the original, so this technique uses as_ref to first take an Option to a reference to the value inside the original.

let text: Option<String> = Some("Hello, world!".to_string());
// First, cast `Option<String>` to `Option<&String>` with `as_ref`,
// then consume *that* with `map`, leaving `text` on the stack.
let text_length: Option<usize> = text.as_ref().map(|s| s.len());
println!("still can print text: {:?}", text);

pub fn as_pin_ref(self: Pin<&Option<T>>) -> Option<Pin<&T>>

Converts from Pin<&Option<T>> to Option<Pin<&T>>.

pub fn as_pin_mut(self: Pin<&mut Option<T>>) -> Option<Pin<&mut T>>

Converts from Pin<&mut Option<T>> to Option<Pin<&mut T>>.

pub const fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

Examples

let x = Some(4);
assert_eq!(x.iter().next(), Some(&4));

let x: Option<u32> = None;
assert_eq!(x.iter().next(), None);

pub fn as_deref(&self) -> Option<&<T as Deref>::Target>

Converts from Option<T> (or &Option<T>) to Option<&T::Target>.

Leaves the original Option in-place, creating a new one with a reference to the original one, additionally coercing the contents via Deref.

Examples

let x: Option<String> = Some("hey".to_owned());
assert_eq!(x.as_deref(), Some("hey"));

let x: Option<String> = None;
assert_eq!(x.as_deref(), None);

Trait Implementations

impl Clone for Column

fn clone(&self) -> Column

Returns a copy of the value.

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

Performs copy-assignment from source.

impl ColumnToVal<NaiveDate> for Column

fn to_val(self) -> Result<NaiveDate, FbError>

impl ColumnToVal<NaiveDateTime> for Column

fn to_val(self) -> Result<NaiveDateTime, FbError>

impl ColumnToVal<NaiveTime> for Column

fn to_val(self) -> Result<NaiveTime, FbError>

impl<T> ColumnToVal<Option<T>> for Column where
    Column: ColumnToVal<T>, 

Implements for all nullable variants

fn to_val(self) -> Result<Option<T>, FbError>

impl ColumnToVal<String> for Column

fn to_val(self) -> Result<String, FbError>

impl ColumnToVal<Vec<u8>> for Column

fn to_val(self) -> Result<Vec<u8>, FbError>

impl ColumnToVal<bool> for Column

fn to_val(self) -> Result<bool, FbError>

impl ColumnToVal<f32> for Column

fn to_val(self) -> Result<f32, FbError>

impl ColumnToVal<f64> for Column

fn to_val(self) -> Result<f64, FbError>

impl ColumnToVal<i16> for Column

fn to_val(self) -> Result<i16, FbError>

impl ColumnToVal<i32> for Column

fn to_val(self) -> Result<i32, FbError>

impl ColumnToVal<i64> for Column

fn to_val(self) -> Result<i64, FbError>

impl Debug for Column

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

Formats the value using the given formatter.

impl Deref for Column

type Target = Option<ColumnType>

The resulting type after dereferencing.

fn deref(&self) -> &<Column as Deref>::Target

Dereferences the value.