Enum Type 

#[non_exhaustive]
pub enum Type {
    Con {
        qualifier: Option<ModuleName>,
        name: Identifier,
        span: Span,
    },
    App(Box<Self>, Vec<Self>, Span),
    List(Box<Self>, Span),
    Tuple(Vec<Self>, Span),
    Fun(Box<Self>, Box<Self>, Span),
    Var(Identifier, Span),
    Unit(Span),
    Constrained(Box<Self>, Span),
    Lit {
        kind: LitKind,
        text: String,
        span: Span,
    },
}

Structured Daml type, parsed from the real token stream.

Scoped to the forms the corpus actually contains; it exists so consumers can tell a type application from a function arrow from an atomic constructor — a distinction a string matcher structurally cannot make. Every node carries a byte span so consumers can render exact source text from (source, span). Unlike declarations, expressions, and patterns, type nodes do not carry a separate Pos; use Type::span and source line mapping when a line/column anchor is required for a type fragment.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Con

Type constructor, possibly qualified: Party, DA.Map.Map.

Fields

qualifier: Option<ModuleName>

Optional module qualifier before the constructor name.

name: Identifier

Constructor name.

span: Span

Span of the constructor token in the source.

App(Box<Self>, Vec<Self>, Span)

Type application, head applied to one or more args: ContractId Foo, Map Text Int, Script (). Type-level nat literals (the 10 in Numeric 10) are NOT types, so they are dropped from the arg list — a Numeric 10 collapses to the bare head Con "Numeric".

List(Box<Self>, Span)

List type [T].

Tuple(Vec<Self>, Span)

Tuple type (a, b, ...).

Fun(Box<Self>, Box<Self>, Span)

Function type a -> b (right-associative).

Var(Identifier, Span)

Lowercase type variable: a, n.

Unit(Span)

The unit type ().

Constrained(Box<Self>, Span)

A constrained type C a => T: the context is not modeled, the body T is kept.

Lit

Type-level string or char literal, e.g. the "observers" in HasField "observers" t PartiesMap.

Fields

kind: LitKind

Literal family.

text: String

Normalized literal payload.

span: Span

Span of the literal token in the source.

Implementations

impl Type

pub const fn span(&self) -> Span

Trait Implementations

impl Clone for Type

fn clone(&self) -> Type

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Type

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

Formats the value using the given formatter.

impl Eq for Type

impl PartialEq for Type

Type equality intentionally ignores source spans.

Spans describe where equivalent type syntax appeared in a source file; they are not part of structural type identity used by parser consumers.

fn eq(&self, other: &Self) -> 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.