Struct ExprOptions 

pub struct ExprOptions {
    pub op: IndexMap<String, Option<OpDef>>,
    pub evaluate: Option<Evaluate>,
}

Options for the plugin.

op is an insertion-ordered map, and the order matters: two operators claiming the same source string resolve to the same token, and the later entry wins, exactly as it does in the canonical TypeScript. A None entry deletes an operator the defaults provide.

Fields

op: IndexMap<String, Option<OpDef>>

evaluate: Option<Evaluate>

Implementations

impl ExprOptions

pub fn new() -> Self

Options carrying no operators of their own; the defaults still apply.

pub fn with_op(self, name: impl Into<String>, def: OpDef) -> Self

Add or replace one operator definition.

pub fn without_op(self, name: impl Into<String>) -> Self

Delete a default operator, the Rust spelling of plain: null.

pub fn with_evaluate( self, evaluate: impl Fn(&mut EvalSite<'_>, &Op, &[Value]) -> Value + Send + Sync + 'static, ) -> Self

Set the evaluator that reduces each expression as it closes.

pub fn from_value(options: &Value) -> Self

Read the operator table out of a serialized option bag, as the engine hands it to a plugin. Unreadable entries are ignored, the way the canonical plugin ignores what it cannot use.

Trait Implementations

impl Clone for ExprOptions

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExprOptions

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

Formats the value using the given formatter.

impl Default for ExprOptions

fn default() -> Self

Returns the “default value” for a type.