Function map_value

crates/flowtrace-cli/src/explain.rs:227–237

If `s` is a "map type" (object with `additionalProperties` and no declared properties — what schemars emits for `BTreeMap `), return the value schema. Else `None`.

(s: &'a SchemaObject)

/// properties — what schemars emits for `BTreeMap<String, T>`), return the
/// value schema. Else `None`.
fn map_value<'a>(s: &'a SchemaObject) -> Option<&'a SchemaObject> {
    let obj = s.object.as_ref()?;
    if !obj.properties.is_empty() {
        return None;
    }
    let ap = obj.additional_properties.as_deref()?;
    match ap {
        Schema::Object(o) => Some(o),
        Schema::Bool(_) => None,
    }
}

/// Find the (property-name, const-value) pair that identifies a tagged-union
/// variant inside `vo`. schemars represents `#[serde(tag = "X")]` as a single