tom-weatherhead/thaw-grammar

// tom-weatherhead/thaw-grammar/src/languages/lisp/domain-object-model/isexpression.ts

export interface ISExpression {
    // TODO: Turn these predicates into 'get' accessors; e.g.:
    // isNumber: boolean; // This is a 'get' accessor.
    isNumber(): boolean;
    isSymbol(): boolean;
    isList(): boolean;
    isNull(): boolean;
    isPrimOp(): boolean;
    isClosure(): boolean;
    isString(): boolean;

    toString(): string;

    isEqualTo(other: unknown): boolean;
}