Struct ExprIsVariant 

pub struct ExprIsVariant {
    pub expr: Box<Expr>,
    pub variant: VariantId,
}

Tests whether an expression evaluates to a specific enum variant.

This is an application-level check that abstracts over the storage format (unit enums stored as bare I64 vs data-carrying enums stored as Records). The lowerer translates this into the appropriate DB-level comparison.

Fields

expr: Box<Expr>

Expression evaluating to an enum value.

variant: VariantId

Identifies the variant to check against.

Trait Implementations

impl Clone for ExprIsVariant

fn clone(&self) -> ExprIsVariant

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExprIsVariant

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

Formats the value using the given formatter.

impl From<ExprIsVariant> for Expr

fn from(value: ExprIsVariant) -> Self

Converts to this type from the input type.

impl PartialEq for ExprIsVariant

fn eq(&self, other: &ExprIsVariant) -> 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 StructuralPartialEq for ExprIsVariant