Struct Schema 

pub struct Schema {
    pub args: Vec<ArgSpec>,
    pub options: BTreeMap<String, OptionSpec>,
    pub strict: bool,
}

The schema declared inline in a sub-command’s fdl.yaml. Maps 1:1 to what <entry> --fdl-schema will later emit as JSON.

Fields

args: Vec<ArgSpec>

options: BTreeMap<String, OptionSpec>

strict: bool

When true, the fdl layer rejects options not declared in the schema before the sub-command’s entry ever runs. Two validation points:

1. Load time — preset options: maps are checked against the enclosing schema.options (see validate_presets_strict). A typo like options: { batchsize: 32 } when the schema declares batch-size is a loud load error.
2. Dispatch time — the user’s extra argv tail is tokenized against the schema (see validate_tail). Unknown flags error out with a “did you mean” suggestion instead of being silently forwarded.

Validation NOT gated by strict — always-on for declared items, so positive assertions from the schema always hold:

• choices: on options: the user’s value and any preset YAML value must be in the list.
• choices: on positional args: the user’s value must be in the list (when strict is off, this may mis-fire if unknown flags push orphan values into positional slots — opt into strict for clean positional handling).

strict is purely about unknown options/args, not about validating declared contracts.

Trait Implementations

impl Clone for Schema

fn clone(&self) -> Schema

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Schema

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

Formats the value using the given formatter.

impl Default for Schema

fn default() -> Schema

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Schema

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Schema

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.