Enum relalg::ScalarExpr

pub enum ScalarExpr {
    Literal(Datum),
    ColRef(usize),
    Eq(Box<ScalarExpr>, Box<ScalarExpr>),
    Plus(Box<ScalarExpr>, Box<ScalarExpr>),
}

Variants

Literal(Datum)

ColRef(usize)

Eq(Box<ScalarExpr>, Box<ScalarExpr>)

Plus(Box<ScalarExpr>, Box<ScalarExpr>)

Implementations

impl ScalarExpr

pub fn eval(&self, data: &[Datum]) -> Datum

Trait Implementations

impl Clone for ScalarExpr

fn clone(&self) -> ScalarExpr

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ScalarExpr

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

Formats the value using the given formatter.

impl Hash for ScalarExpr

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ScalarExpr

fn eq(&self, other: &ScalarExpr) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl ToTokens for ScalarExpr

fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream.

fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object.

fn into_token_stream(self) -> TokenStream

where Self: Sized,

Convert self directly into a TokenStream object.

impl Eq for ScalarExpr

impl StructuralPartialEq for ScalarExpr