Struct InMemorySchemaBuilder 

pub struct InMemorySchemaBuilder { /* private fields */ }

Builder for InMemorySchema.

All mutation goes through this builder so the target struct remains invariant-preserving: unique label / rel type / parameter names, deterministic iteration order (spec 0001 §17.14).

Implementations

impl InMemorySchemaBuilder

pub fn add_label(self, name: SmolStr, properties: Vec<PropertyDecl>) -> Self

Declare a label. The first insertion wins; subsequent insertions with the same name are recorded and surfaced by InMemorySchemaBuilder::build.

pub fn add_rel_type(self, rel: RelDecl) -> Self

Declare a relationship type. The first insertion wins; subsequent insertions are recorded and surfaced by InMemorySchemaBuilder::build.

pub fn add_parameter(self, param: ParamDecl) -> Self

Declare a query parameter.

pub fn schema_name(self, name: Option<SmolStr>) -> Self

Set the schema name from a [meta] block.

pub fn description(self, desc: Option<String>) -> Self

Set the description from a [meta] block.

pub fn build(self) -> Result<InMemorySchema, BuilderError>

Finalise the builder.

Returns the first duplicate label name encountered (if any), the first duplicate rel type name, or the built schema. Reference validation (rel_type endpoints referring to declared labels) lives in the TOML loader, not the builder — the builder has no view of the original source ordering.

Trait Implementations

impl Debug for InMemorySchemaBuilder

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

Formats the value using the given formatter.

impl Default for InMemorySchemaBuilder

fn default() -> InMemorySchemaBuilder

Returns the “default value” for a type.