How to use neverEnds method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

statement.ts

Source:statement.ts Github

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1import { ExprElement, Statement, ValueType } from '../shared/ast'2import { diagnostic, DiagnosticLevel } from '../shared/diagnostics'3import { CodeSection, Token } from '../shared/parsed'4import { matchStrWithValues, matchUnion } from '../shared/utils'5import { err, success, Typechecker, TypecheckerResult } from './base'6import { blockChecker, StatementChainMetadata } from './block'7import { cmdCallTypechecker } from './cmdcall'8import { cmdDeclSubCommandTypechecker } from './cmddecl'9import { enumMatchingTypechecker } from './matching'10import { getTypedEntityInScope } from './scope/search'11import { resolveValueChainings } from './types/chaining'12import { buildExprDoubleOp, resolveDoubleOpType } from './types/double-op'13import { resolveCondOrTypeAssertionType, resolveExprType } from './types/expr'14import { validateFnBody } from './types/fn'15import { rebuildType } from './types/rebuilder'16import { typeValidator } from './types/validator'17export type StatementMetadata = Omit<StatementChainMetadata, 'topLevelScope'>18export const statementChecker: Typechecker<Token<Statement>, StatementMetadata> = (stmt, ctx) => {19 return matchUnion(stmt.parsed, 'type', {20 variableDecl: ({ varname, vartype, mutable, expr }): TypecheckerResult<StatementMetadata> => {21 const entity = ctx.scopes[ctx.scopes.length - 1].entities.get(varname.parsed)22 if (entity?.type === 'fn') {23 return err(varname.at, {24 message: 'a function already exists with this name',25 also: [{ at: entity.at, message: 'original declaration occurs here' }],26 })27 }28 let expectedType: ValueType | null = null29 if (vartype) {30 const validation = typeValidator(vartype.parsed, ctx)31 if (!validation.ok) return validation32 expectedType = vartype.parsed33 }34 const validation = resolveExprType(expr, {35 ...ctx,36 typeExpectation: expectedType37 ? {38 type: expectedType,39 from: vartype?.at ?? null,40 }41 : null,42 })43 if (!validation.ok) return validation44 ctx.scopes[ctx.scopes.length - 1].entities.set(varname.parsed, {45 type: 'var',46 at: varname.at,47 mutable: mutable.parsed,48 varType: expectedType ?? validation.data,49 })50 return success({ neverEnds: false })51 },52 assignment: ({ varname, propAccesses, prefixOp, listPush, expr }) => {53 if (prefixOp && listPush) {54 return err(prefixOp.at, 'cannot use an arithmetic operator when pushing to a list')55 }56 const tryScopedVar = getTypedEntityInScope(varname, 'var', ctx)57 if (!tryScopedVar.ok) return tryScopedVar58 if (!tryScopedVar.data.mutable) {59 return err(varname.at, {60 message: `cannot assign to non-mutable variable \`${varname.parsed}\``,61 complements: [['tip', 'you can make the variable mutable by declaring it with `let mut` instead of `let`']],62 })63 }64 let expectedType: ValueType = tryScopedVar.data.varType65 const leftAt: CodeSection = {66 start: varname.at.start,67 next: propAccesses.length > 0 ? propAccesses[propAccesses.length - 1].at.next : varname.at.next,68 }69 if (propAccesses.length > 0) {70 const check = resolveValueChainings(71 {72 left: {73 at: varname.at,74 matched: varname.matched,75 parsed: {76 type: 'value',77 content: {78 at: varname.at,79 matched: varname.matched,80 parsed: {81 type: 'reference',82 varname,83 },84 },85 },86 },87 leftType: expectedType,88 chainings: propAccesses.map((access) => ({89 at: access.at,90 matched: access.matched,91 parsed: { type: 'propertyAccess', access: access.parsed, nullable: false },92 })),93 },94 ctx95 )96 if (!check.ok) return check97 expectedType = check.data98 }99 let listPushType: ValueType | null100 if (listPush) {101 if (expectedType.type !== 'list') {102 return err(listPush.at, 'cannot use the push syntax ([]) on a non-list value')103 }104 listPushType = expectedType.itemsType105 } else {106 listPushType = null107 }108 const synth: Token<ExprElement> = {109 at: expr.at,110 matched: expr.matched,111 parsed: {112 content: {113 at: expr.at,114 matched: expr.matched,115 parsed: {116 type: 'synth',117 inner: expr,118 },119 },120 chainings: [],121 },122 }123 const check: TypecheckerResult<ValueType> = prefixOp124 ? resolveDoubleOpType(125 { leftExprAt: leftAt, leftExprType: expectedType, op: buildExprDoubleOp(prefixOp, expr.at, synth, []) },126 ctx127 )128 : resolveExprType(expr, { ...ctx, typeExpectation: { type: listPushType ?? expectedType, from: leftAt } })129 if (!check.ok) return check130 return success({ neverEnds: false })131 },132 ifBlock: ({ cond, then: body, elif, els }) => {133 const condCheck = resolveCondOrTypeAssertionType(cond, {134 ...ctx,135 typeExpectation: { type: { type: 'bool' }, from: null },136 })137 if (!condCheck.ok) return condCheck138 const thenCheck = blockChecker(139 body,140 condCheck.data.type === 'assertion'141 ? { ...ctx, scopes: ctx.scopes.concat([condCheck.data.normalAssertionScope]) }142 : ctx143 )144 if (!thenCheck.ok) return thenCheck145 const blocksMetadata: StatementChainMetadata[] = []146 for (const { cond, body } of elif) {147 const condCheck = resolveCondOrTypeAssertionType(cond, {148 ...ctx,149 typeExpectation: { type: { type: 'bool' }, from: null },150 })151 if (!condCheck.ok) return condCheck152 const elifCheck = blockChecker(body, {153 ...ctx,154 scopes:155 condCheck.data.type === 'assertion' ? ctx.scopes.concat([condCheck.data.normalAssertionScope]) : ctx.scopes,156 })157 if (!elifCheck.ok) return elifCheck158 blocksMetadata.push(elifCheck.data)159 }160 if (els) {161 const elseCheck = blockChecker(162 els,163 condCheck.data.type === 'assertion' && condCheck.data.inverted164 ? { ...ctx, scopes: ctx.scopes.concat(condCheck.data.normalAssertionScope) }165 : ctx166 )167 if (!elseCheck.ok) return elseCheck168 blocksMetadata.push(elseCheck.data)169 }170 const neverEnds = blocksMetadata.every((metadata) => metadata.neverEnds)171 if (172 condCheck.data.type === 'assertion' &&173 ((condCheck.data.inverted && thenCheck.data.neverEnds) || (!condCheck.data.inverted && neverEnds))174 ) {175 const assertionScope = condCheck.data.inverted176 ? condCheck.data.normalAssertionScope177 : condCheck.data.oppositeAssertionScope178 for (const [varname, scopedVar] of assertionScope.entities) {179 ctx.scopes[ctx.scopes.length - 1].entities.set(varname, scopedVar)180 }181 }182 return success({183 // a simple 'if' with no 'else' variant cannot never-end (e.g. `if <cond> { <throw> }` is not never-ending)184 neverEnds: neverEnds && els !== null && thenCheck.data.neverEnds,185 })186 },187 forLoop: ({ loopVar, subject, body }) => {188 const subjectType = resolveExprType(subject, { ...ctx, typeExpectation: null })189 if (!subjectType.ok) return subjectType190 if (subjectType.data.type === 'map') {191 return err(subject.at, {192 message: 'cannot iterate directly on maps',193 complements: [['tip', 'you can iterate on maps using: for key, value in <a map>']],194 })195 } else if (subjectType.data.type !== 'list') {196 return err(197 subject.at,198 `cannot iterate over non-list/map values (found \`${rebuildType(subjectType.data, { noDepth: true })}\`)`199 )200 }201 const check = blockChecker(body, {202 ...ctx,203 inLoop: true,204 scopes: ctx.scopes.concat([205 {206 generics: new Map(),207 methods: [],208 entities: new Map([209 [loopVar.parsed, { type: 'var', at: loopVar.at, mutable: false, varType: subjectType.data.itemsType }],210 ]),211 },212 ]),213 })214 if (!check.ok) return check215 if (check.data.neverEnds) {216 ctx.emitDiagnostic(diagnostic(stmt.at, 'this loop always returns or breaks', DiagnosticLevel.Warning))217 }218 return success({ neverEnds: check.data.neverEnds })219 },220 forLoopDuo: ({ keyVar, valueVar, subject, body }) => {221 const subjectType = resolveExprType(subject, ctx)222 if (!subjectType.ok) return subjectType223 if (subjectType.data.type !== 'list' && subjectType.data.type !== 'map') {224 return err(225 subject.at,226 `expected a \`list\` or \`map\` to iterate on, found a \`${rebuildType(subjectType.data, {227 noDepth: true,228 })}\``229 )230 }231 const iterVarType: ValueType = matchStrWithValues(subjectType.data.type, {232 list: { type: 'int' },233 map: { type: 'string' },234 })235 const check = blockChecker(body, {236 ...ctx,237 inLoop: true,238 scopes: ctx.scopes.concat([239 {240 generics: new Map(),241 methods: [],242 entities: new Map([243 [keyVar.parsed, { type: 'var', at: keyVar.at, mutable: false, varType: iterVarType }],244 [valueVar.parsed, { type: 'var', at: valueVar.at, mutable: false, varType: subjectType.data.itemsType }],245 ]),246 },247 ]),248 })249 if (!check.ok) return check250 if (check.data.neverEnds) {251 ctx.emitDiagnostic(diagnostic(stmt.at, 'this loop always returns or breaks', DiagnosticLevel.Warning))252 }253 return success({ neverEnds: check.data.neverEnds })254 },255 whileLoop: ({ cond, body }) => {256 const condCheck = resolveCondOrTypeAssertionType(cond, {257 ...ctx,258 typeExpectation: { type: { type: 'bool' }, from: null },259 })260 if (!condCheck.ok) return condCheck261 const check = blockChecker(body, {262 ...ctx,263 inLoop: true,264 scopes:265 condCheck.data.type === 'assertion' ? ctx.scopes.concat([condCheck.data.normalAssertionScope]) : ctx.scopes,266 })267 if (!check.ok) return check268 if (check.data.neverEnds) {269 ctx.emitDiagnostic(diagnostic(stmt.at, 'this loop always returns or breaks', DiagnosticLevel.Warning))270 }271 return success({ neverEnds: false })272 },273 continue: () => {274 if (!ctx.inLoop) {275 return err(stmt.at, 'the "continue" instruction is only allowed inside loops')276 }277 return success({ neverEnds: true })278 },279 break: () => {280 if (!ctx.inLoop) {281 return err(stmt.at, 'the "break" instruction is only allowed inside loops')282 }283 return success({ neverEnds: true })284 },285 // Nothing to do here, already handled in first pass286 typeAlias: () => success({ neverEnds: false }),287 // Same here288 enumDecl: () => success({ neverEnds: false }),289 match: ({ subject, arms }) => {290 let neverEnds = true291 const check = enumMatchingTypechecker(292 subject,293 arms,294 ctx,295 (matchWith) => blockChecker(matchWith.parsed, ctx),296 (block) => {297 neverEnds &&= block.neverEnds298 }299 )300 return check.ok ? success({ neverEnds }) : check301 },302 fnDecl: ({ fnType, body }) => {303 const check = validateFnBody({ fnType, body }, ctx)304 return check.ok ? success({ neverEnds: false }) : check305 },306 methodDecl: ({ fnType, body }) => {307 const check = validateFnBody({ fnType, body }, ctx)308 return check.ok ? success({ neverEnds: false }) : check309 },310 return: ({ expr }) => {311 if (!ctx.fnExpectation) {312 return err(stmt.at, '`return` statements are only allowed inside functions')313 }314 if (!ctx.fnExpectation.returnType) {315 return expr316 ? err(expr.at, 'current function does not have a return type so the `return` statement should be empty')317 : success({ neverEnds: true })318 }319 if (!expr) {320 return err(stmt.at, {321 message: `missing return expression (expected \`${rebuildType(ctx.fnExpectation.returnType.type)}\`)`,322 also: [323 {324 at: ctx.fnExpectation.returnType.from,325 message: 'return type expectation originates here',326 },327 ],328 })329 }330 const resolved = resolveExprType(expr, { ...ctx, typeExpectation: ctx.fnExpectation.returnType })331 return resolved.ok ? success({ neverEnds: true }) : resolved332 },333 panic: ({ message }) => {334 const check = resolveExprType(message, {335 ...ctx,336 typeExpectation: { from: null, type: { type: 'string' } },337 })338 if (!check.ok) return check339 return success({ neverEnds: true })340 },341 cmdCall: ({ content }) => {342 const cmdCallCheck = cmdCallTypechecker(content, ctx)343 return cmdCallCheck.ok ? success({ neverEnds: false }) : cmdCallCheck344 },345 cmdDecl: ({ name, body }) => {346 const orig = ctx.commandDeclarations.get(name.parsed)347 if (orig) {348 return err(name.at, {349 message: 'cannot declare a command twice',350 also: [{ at: orig.at, message: 'command was originally declared here' }],351 })352 }353 if (!ctx.checkIfCommandExists(name.parsed)) {354 return err(name.at, 'this command was not found in PATH')355 }356 const check = cmdDeclSubCommandTypechecker(body, ctx)357 if (!check.ok) return check358 ctx.commandDeclarations.set(name.parsed, { at: name.at, content: body })359 return success({ neverEnds: false })360 },361 // Nothing to do here, already handled in first pass362 fileInclusion: () => success({ neverEnds: false }),363 runExpr: ({ content }) => {364 if (365 content.parsed.from.parsed.content.parsed.type !== 'value' ||366 content.parsed.from.parsed.content.parsed.content.parsed.type !== 'fnCall'367 ) {368 return err(content.at, 'only function calls are allowed as statements')369 }370 const returnType = resolveExprType(content, ctx)371 if (!returnType.ok) return returnType372 if (returnType.data.type === 'failable') {373 ctx.emitDiagnostic(diagnostic(content.at, 'unhandled `failable` value', DiagnosticLevel.Warning))374 }375 return success({ neverEnds: false })376 },377 })...

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WrapSuccessError.js

Source:WrapSuccessError.js Github

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1//2. the asyncErrorRace with dependency support2const neverEnds = new Promise(r => r);3//removes *-prefix and turns all (pending) Promises into undefined4// (a normal object will be able to hold Promises, but a firstWinsObject will only hold pending Promises.)5function getArgsRightNow(state, args) {6 return args.map(arg => (arg = state[arg[0] === '*' ? arg.substr(1) : arg], arg instanceof Promise ? undefined : arg));7}8/**9 * @param state<Object> The object which contains the arguments10 * @param args<Array: string> the properties on the object which must be resolved,11 * all args prefixed with "*" are skipped.12 * @returns {Promise|boolean}13 * true if all the arguments are resolved,14 * otherwise a Promise when all the arguments are resolved15 */16function argsReady(state, args) {17 const awaitArgs = args.filter(arg => arg[0] !== '*').map(arg => state[arg]).filter(arg => arg instanceof Promise);18 return awaitArgs.length ? Promise.allSettled(awaitArgs) : true;19}20function syncInvokefun(fun, state, args) {21 try {22 const argsRightNow = getArgsRightNow(state, args);23 const res = fun(...argsRightNow);24 if (!(res instanceof Promise))25 return {success: res, error: neverEnds};26 let resCb, errCb;27 const success = new Promise(r => resCb = r), error = new Promise(r => errCb = r);28 res.then(r => resCb(r), e => errCb(e));29 return {success, error};30 } catch (err) {31 return {success: neverEnds, error: err};32 }33}34function asyncInvokeFun(ready, fun, state, args) {35 let resCb, errCb;36 const success = new Promise(r => resCb = r), error = new Promise(r => errCb = r);37 ready.then(() => {38 try {39 const argsRightNow = getArgsRightNow(state, args);40 const res = fun(...argsRightNow);41 res instanceof Promise ? res.then(r => resCb(r), e => errCb(e)) : resCb(res);42 } catch (err) {43 errCb(err);44 }45 });46 return {success, error};47}48export function wrapSuccessError(fun, state, args) {49 const ready = argsReady(state, args);50 return ready === true ? syncInvokefun(fun, state, args) : asyncInvokeFun(ready, fun, state, args);...

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Never&Void.ts

Source:Never&Void.ts Github

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...16 shootError('Not Found', 404);17} catch (error) {18 console.log(error.message);19}20// function neverEnds(): never {21// let counter: number = 1;22// while (true) {23// counter += 1;24// }25// }...

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Using AI Code Generation

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1neverEnds();2neverEnds();3neverEnds();4neverEnds();5neverEnds();6neverEnds();7neverEnds();8neverEnds();9neverEnds();10neverEnds();11neverEnds();12neverEnds();13neverEnds();14neverEnds();15neverEnds();16neverEnds();17neverEnds();18neverEnds();19neverEnds();20neverEnds();

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Using AI Code Generation

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1import { neverEnds } from 'fast-check-monorepo';2neverEnds();3{4 "compilerOptions": {5 "paths": {6 }7 },8}9{10 "scripts": {11 },12 "dependencies": {13 }14}15{16 "scripts": {17 },18 "repository": {

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Using AI Code Generation

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1const { neverEnds } = require('fast-check')2neverEnds()3{4 "scripts": {5 },6 "dependencies": {7 }8}

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Using AI Code Generation

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1const { neverEnds } = require('fast-check-monorepo');2describe('neverEnds', () => {3 it('should never end', () => {4 neverEnds();5 });6});7const { neverEnds } = require('fast-check');8describe('neverEnds', () => {9 it('should never end', () => {10 neverEnds();11 });12});

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Using AI Code Generation

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1const { neverEnds } = require('fast-check-monorepo');2const { neverEnds } = require('fast-check');3const { neverEnds } = require('fast-check-monorepo');4const { neverEnds } = require('fast-check');5const { neverEnds } = require('fast-check-monorepo');6const { neverEnds } = require('fast-check');7const { neverEnds } = require('fast-check-monorepo');8const { neverEnds } = require('fast-check');9const { neverEnds } = require('fast-check-monorepo');10const { neverEnds } = require('fast-check');

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Using AI Code Generation

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1const { neverEnds } = require('fast-check');2const test = () => {3 neverEnds();4};5test();6const { neverEnds } = require('fast-check');7const test = () => {8 neverEnds();9};10test();11const { neverEnds } = require('fast-check');12const test = () => {13 neverEnds();14};15test();16const { neverEnds } = require('fast-check');17const test = () => {18 neverEnds();19};20test();21const { neverEnds } = require('fast-check');22const test = () => {23 neverEnds();24};25test();26const { neverEnds } = require('fast-check');27const test = () => {28 neverEnds();29};30test();31const { neverEnds } = require('fast-check');32const test = () => {33 neverEnds();34};35test();36const { neverEnds } = require('fast-check');37const test = () => {38 neverEnds();39};40test();41const { neverEnds } = require('fast-check');42const test = () => {43 neverEnds();44};45test();46const { neverEnds } = require('fast-check');47const test = () => {48 neverEnds();49};50test();51const { neverEnds } = require('fast-check');52const test = () => {

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