flatten_metadata

struct FlattenMetadata
FlattenMetadata(source_systems::Vector{String}, coupling_rules_applied::Vector{String}, dimension_promotions_applied::Vector{NamedTuple}, opaque_coupling_refs::Vector{String}, merged_variable_renames::OrderedCollections.OrderedDict{String, String})
FlattenMetadata(source_systems, coupling_rules_applied, dimension_promotions_applied, opaque_coupling_refs, merged_variable_renames)
FlattenMetadata(; ...)
FlattenMetadata(source_systems::Vector{String}; ...)
FlattenMetadata(source_systems::Vector{String}, coupling_rules_applied::Vector{String}; dimension_promotions_applied, opaque_coupling_refs, merged_variable_renames)

FlattenMetadata

interface FlattenMetadata {
    sourceSystems: string[];
    couplingRules: string[];
    operatorApplies: string[];
    callbacks: string[];
    mergedVariableRenames: Record<string, string>;
    couplingRewrittenNames: Set<string>;
}

class FlattenMetadata
FlattenMetadata(source_systems: list[str] = list(), coupling_rules: list[str] = list(), operator_applies: list[str] = list(), callbacks: list[str] = list(), merged_variable_renames: dict[str, str] = dict(), coupling_rewritten_names: set[str] = set())

pub struct FlattenMetadata {
    pub source_systems: Vec<String>,
    pub coupling_rules_applied: Vec<String>,
    pub dimension_promotions_applied: Vec<DimensionPromotionRecord>,
    pub implicit_interface_inferred: bool,
    pub merged_variable_renames: IndexMap<String, String>,
    pub coupling_rewritten_names: BTreeSet<String>,
}

type FlattenMetadata struct {
	SourceSystems []string // names of systems that were flattened
	CouplingRules []string // descriptions of coupling rules applied
	// OperatorApplies are the `operator_apply` coupling entries, recorded as
	// opaque runtime references (§4.7.5 step 3).
	OperatorApplies []string
	// Callbacks are the `callback` coupling entries, likewise.
	Callbacks []string
	// MergedVariableRenames maps every state spelling an `operator_compose`
	// renaming match DELETED onto the survivor it was folded into (issue #230).
	//
	// The flattener's own retarget reaches equation ASTs; this is the map a
	// CONSUMER that addresses a state by name needs — a parameter_overrides /
	// initial_conditions key, an output selection — to resolve a spelling the
	// merge moved out from under it. Nil for a document with no renaming merge,
	// which is the overwhelming majority.
	MergedVariableRenames map[string]string
	// CouplingRewrittenNames is every name a COUPLING rule rewrote out of the
	// flattened equations: a `variable_map`'s substituted target, and every
	// merged-away spelling above.
	//
	// Only the registry guard reads it — a surviving expression-template body is
	// authored source no substitution reaches, so a body naming one of these is
	// REFUSED rather than resolved (checkRegistryCouplingRewrites,
	// CONFORMANCE_SPEC §5.35). Not a consumer-facing map, unlike
	// MergedVariableRenames: it says a name is GONE, not where it went.
	CouplingRewrittenNames map[string]bool
}