Enum LambdaExpr 

pub enum LambdaExpr<'a, T> {
    Lambda(LambdaExprRef, LambdaType),
    BoundVariable(usize, LambdaType),
    FreeVariable(FreeVar<'a>, LambdaType),
    Application {
        subformula: LambdaExprRef,
        argument: LambdaExprRef,
    },
    LanguageOfThoughtExpr(T),
}

The core expression type of a lambda term

Variants

Lambda(LambdaExprRef, LambdaType)

A lambda of a given type.

BoundVariable(usize, LambdaType)

A variable bound by a lambda, labeled by its De Bruijn index.

FreeVariable(FreeVar<'a>, LambdaType)

A free variable (may be named or anonymous, see FreeVar).

Application

The application of an argument to a function

Fields

subformula: LambdaExprRef

The body of the function

argument: LambdaExprRef

The argument of the function

LanguageOfThoughtExpr(T)

Any expression which is not part of the lambda calculus directly (e.g. primitives). See crate::Expr for an example.

Trait Implementations

impl<'a, T: Clone> Clone for LambdaExpr<'a, T>

fn clone(&self) -> LambdaExpr<'a, T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a, T: Debug> Debug for LambdaExpr<'a, T>

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

Formats the value using the given formatter.

impl<'a, T: Hash> Hash for LambdaExpr<'a, T>

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<'a, T: PartialEq> PartialEq for LambdaExpr<'a, T>

fn eq(&self, other: &LambdaExpr<'a, T>) -> 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<'a, T: Eq> Eq for LambdaExpr<'a, T>

impl<'a, T> StructuralPartialEq for LambdaExpr<'a, T>