Type Alias Scope 

pub type Scope = BTreeMap<String, Value>;

The scope an expression evaluates against: column name → value. A missing name reads as Null. Any Lookup works; this is the convenient owned form.

Aliased Type

pub struct Scope { /* private fields */ }

Trait Implementations

impl Lookup for Scope

fn lookup(&self, name: &str) -> Value

The value bound to name, or Value::Null.