import {Command, ParseContext, StrTerm} from "./command.js";
import {LexInput} from "../lexer.js";

export type RSubData = {
    offset: StrTerm,
    length?: StrTerm,
}

export class RSub extends Command<RSubData> {
    attemptParse(context: ParseContext): RSubData {
        return {
            offset: context.popTerm(),
            length: context.popOptionalTerm(),
        }
    }

    getDisplayName(): string {
        return 'rsub'
    }

    isParseCandidate(token: LexInput): boolean {
        return this.isKeyword(token, 'rsub')
    }
}