Enum Term 

pub enum Term {
    Truth,
    Unit,
    Text,
    Literal(String),
    NameWord(Vec<String>),
    Int {
        signed: bool,
        bits: u16,
    },
    Float {
        bits: u16,
    },
    Bytes {
        len: Option<usize>,
    },
    Hex(Box<Term>),
    Decimal(Box<Term>),
    Base64(Box<Term>),
    Opt(Box<Term>),
    Seq(Box<Term>),
    Map(Box<Term>, Box<Term>),
    Product(Vec<Member>),
    Choice(Vec<Term>),
    Named {
        words: Vec<String>,
        body: Box<Term>,
    },
    Reference(Vec<String>),
}

A shape, as a value.

Variants

Truth

Unit

Text

Literal(String)

NameWord(Vec<String>)

Int

Fields

signed: bool

bits: u16

Float

Fields

bits: u16

Bytes

Fields

len: Option<usize>

Hex(Box<Term>)

Decimal(Box<Term>)

Base64(Box<Term>)

Opt(Box<Term>)

Seq(Box<Term>)

Map(Box<Term>, Box<Term>)

Product(Vec<Member>)

Choice(Vec<Term>)

Named

Fields

words: Vec<String>

body: Box<Term>

Reference(Vec<String>)

Implementations

impl Term

pub fn fold<A>(&self, alg: &A) -> A::Ty

where A: ShapeAlg + FieldAlg,

Folds this term into whichever algebra an interpretation provides.

This is the reader: a term written by one host is interpreted by another without either naming the other’s types. Reading and writing are checked against each other, since folding a written term with any interpretation answers what interpreting the original directly does.

pub fn resolved(&self) -> Self

Answers with this term, with every reference replaced by the shape its name introduces.

A fold cannot do this: it builds from the leaves upward, so a reference reaches it before the name it uses has been seen. A term holds the whole shape at once, which is what makes a name resolvable — and is why an interpretation that must decide a value, rather than describe one, reads a resolved term.

A name that would resolve into itself is left as a reference, since expanding it never ends.

Trait Implementations

impl Clone for Term

fn clone(&self) -> Term

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Term

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Term

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Term

impl PartialEq for Term

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Term

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Term