Module expr 

The Expr graph: the checked-form representation of source.

The kernel defines the expression graph, number literals, quote modes, and source-origin tracking; general-purpose codecs in library crates round-trip every expression through this shared graph.

Structs

LocatedExpr

An Expr paired with its optional source Origin.

LocatedExprTree

A located expression together with its located children.

NumberLiteral

A number literal: a domain symbol plus its canonical textual form.

Origin

Source provenance of an expression: which codec, source, span, and trivia.

SourceId

Opaque identifier of a registered source.

SourceRegistry

A store mapping each SourceId to its raw source bytes.

Span

A half-open byte range [start, end) within a source.

Enums

CanonicalKey

A normalized, comparable key derived from an Expr.

Expr

The codec-neutral expression graph: the checked form of source.

QuoteMode

The quoting mode attached to a Expr::Quote form.

Trivia

Non-semantic source trivia preserved alongside an expression.