Trait Schema 

pub trait Schema: Send + Sync {
    // Required methods
    fn shape_id(&self) -> &ShapeId;
    fn shape_type(&self) -> ShapeType;
    fn traits(&self) -> &TraitMap;

    // Provided methods
    fn member_name(&self) -> Option<&str> { ... }
    fn member_schema(&self, _name: &str) -> Option<&dyn Schema> { ... }
    fn member_schema_by_index(&self, _index: usize) -> Option<&dyn Schema> { ... }
    fn member(&self) -> Option<&dyn Schema> { ... }
    fn key(&self) -> Option<&dyn Schema> { ... }
    fn members(&self) -> Box<dyn Iterator<Item = &dyn Schema> + '_> { ... }
    fn member_index(&self) -> Option<usize> { ... }
}

Core trait representing a Smithy schema at runtime.

A schema is a lightweight runtime representation of a Smithy shape, containing the shape’s ID, type, traits, and references to member schemas.

Required Methods

fn shape_id(&self) -> &ShapeId

Returns the Shape ID of this schema.

fn shape_type(&self) -> ShapeType

Returns the shape type.

fn traits(&self) -> &TraitMap

Returns the traits associated with this schema.

Provided Methods

fn member_name(&self) -> Option<&str>

Returns the member name if this is a member schema.

fn member_schema(&self, _name: &str) -> Option<&dyn Schema>

Returns the member schema by name (for structures and unions).

fn member_schema_by_index(&self, _index: usize) -> Option<&dyn Schema>

Returns the member schema by position index (for structures and unions).

This is an optimization for generated code to avoid string lookups. Consumer code should not rely on specific position values as they may change.

fn member(&self) -> Option<&dyn Schema>

Returns the member schema for collections (list member or map value).

fn key(&self) -> Option<&dyn Schema>

Returns the key schema for maps.

fn members(&self) -> Box<dyn Iterator<Item = &dyn Schema> + '_>

Returns an iterator over member schemas (for structures and unions).

fn member_index(&self) -> Option<usize>

Returns the member index for member schemas.

This is used internally by generated code for efficient member lookup. Returns None if not applicable or not a member schema.

Implementors

impl Schema for PreludeSchema