oftlisp

Trait Context

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pub trait Context: Sized {
    type BuiltinFunction: Clone + Debug + Finalize + Trace;
    type Expr: Clone + Debug + Finalize + Trace;
    type ObjectVtable: Clone + Debug + Finalize + Trace;
    type UserFunction: Clone + Debug + Finalize + Trace;
    type ValueMeta: Clone + Debug + Default + Finalize + Trace;

    // Required method
    fn from_expr(expr: Gc<Expr<Self>>) -> Gc<Self::Expr>;
}
Expand description

A trait for the things a Value is parameterized over.

Yeah, it’s vague. Basically, think of it as a collection of associated types that is used to define Value.

Required Associated Types§

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type BuiltinFunction: Clone + Debug + Finalize + Trace

The type of a function implemented by the runtime.

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type Expr: Clone + Debug + Finalize + Trace

The type of an expression in the AST.

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type ObjectVtable: Clone + Debug + Finalize + Trace

The type of the vtable of an object.

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type UserFunction: Clone + Debug + Finalize + Trace

The type of a user function. This probably should just be the arguments (as an Args<C>), the body (as C::Expr), and the variables closed over and their values (as a GcLinkedList<(Symbol, Value<C>)>).

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type ValueMeta: Clone + Debug + Default + Finalize + Trace

The metadata attached to the value.

Required Methods§

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fn from_expr(expr: Gc<Expr<Self>>) -> Gc<Self::Expr>

Converts a standard ast::Expr to the expression type of the context.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§