Module cst 

The frontend’s concrete syntax tree (CST).

Source-preserving syntax structure with spans on every node, produced by crate::parser and consumed by [crate::lower] (and, in later milestones, language services). Nodes are deliberately close to the Opy HIR contract so lowering stays a small, reviewable mapping; unresolved names and member accesses remain explicit until semantic resolution.

Structs

Annotation

A source annotation retained for tooling and provenance.

AnnotationArg

One raw annotation argument. Values such as heroes, teams, and slots stay opaque here because their canonical domains belong to workshop-rs.

CallArg

One call argument: either positional (expr) or keyword (name = expr, issue #110). Keyword arguments keep the name token’s exact span so binding diagnostics are source-located on the name (unknown/duplicate keyword) or the value (enum-domain, arity of the value expression) as appropriate.

DictEntry

One key/value pair in an OPY dictionary literal.

Event

A rule event or an @Event directive.

IfBranch

One condition/body pair of an if.

Program

A parsed program: declarations and rule/subroutine entries.

Rule

A rule with its event, conditions, and actions.

Settings

A parsed settings { ... } block (JSONC, #86).

SettingsListElement

One element of a settings list.

Enums

Decl

A program-scope declaration.

Expr

An expression.

RuleEntry

A rule or a subroutine definition.

SettingsNode

One member of a settings group.

Stmt

A statement.

SwitchArm

One source-ordered arm in a switch statement.

TopLevel

A top-level declaration or rule entry in source order.