js-slang
Version:
Javascript-based implementations of Source, written in Typescript
13 lines (12 loc) • 438 B
TypeScript
import { StepperExpression, StepperPattern } from './nodes';
export interface StepperBaseNode {
type: string;
isContractible(): boolean;
isOneStepPossible(): boolean;
contract(): StepperBaseNode;
oneStep(): StepperBaseNode;
substitute(id: StepperPattern, value: StepperExpression): StepperBaseNode;
freeNames(): string[];
allNames(): string[];
rename(before: string, after: string): StepperBaseNode;
}