35 lines
1.0 KiB
TypeScript
35 lines
1.0 KiB
TypeScript
import {Command, joinDestructured, ParseContext, StrTerm, unwrapDestructured, wrapString} from "./command.js";
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import {LexInput} from "../lexer.js";
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import {StrVM} from "../vm.js";
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import {Awaitable} from "../../util/types.js";
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export class Join extends Command<{ with?: StrTerm }> {
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attemptParse(context: ParseContext): { with?: StrTerm } {
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return {
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with: context.popOptionalTerm(),
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}
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}
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getDisplayName(): string {
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return 'join'
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}
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isParseCandidate(token: LexInput): boolean {
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return this.isKeyword(token, 'join')
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}
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execute(vm: StrVM, data: { with?: StrTerm }): Awaitable<StrVM> {
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return vm.replaceContextMatchingTerm(ctx => ({
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restructure: parts => {
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if ( data.with ) {
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return parts
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.map(part => part.value)
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.join(ctx.resolveString(data.with))
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}
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return joinDestructured(parts)
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}
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}))
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}
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}
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