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189
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple prompt system for a command-line interface. The prompt system should support requesting and res...
1,927
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a validation system for a JSON schema. The system should be able to handle various types of errors and p...
2,100
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that converts a given string into a specific format. The function should take a string as inp...
3,109
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple encryption algorithm for a text-based messaging application. The algorithm should shift each le...
3,399
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple bit manipulation data structure in Rust. The data structure should support two operations: `cha...
4,879
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a utility function for setting authorization headers in an HTTP request. The function should support set...
1,932
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a custom deserializer for a specific data type in Rust. The data type in question is a URI (Uniform Resource...
872
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that constructs a window and a graphics context for a simple 2D game using the `winit` and `g...
776
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a bingo game simulator in Rust. The game involves drawing numbers from a pool and marking them on a bing...
2,160
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that processes a given input string to identify and extract key phrases. A key phrase is defi...
3,496
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simplified version of a stack-based job execution system. The system consists of a `StackJob` struct, ...
1,056
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to retrieve data from a PostgreSQL database using Rust's async/await syntax. The provided cod...
3,235
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are working on a data processing library in Rust and need to implement a method for converting a data series to a new series containi...
1,483
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are working on a web application that visualizes performance metrics for a machine learning model. The code snippet provided is a par...
4,783
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given two arrays, `nums` and `index`, both of the same length `n`. The `nums` array contains distinct integers, and the `index` a...
3,168
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust module that handles various types of output. The module should provide functionality for formatting a...
4,103
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to process chat data from the given code snippet. The `Chat` struct represents a chat room an...
3,279
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a binary logical expression evaluator. The evaluator should support the logical AND (`&&`) and logical O...
558
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple Rust program that simulates an executor for different protocols. The executor is responsible fo...
517
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a directed graph represented as an adjacency list. Each node in the graph is labeled from 0 to n-1, where n is the number o...
3,501
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom macro in Rust that generates implementations for a trait for multiple types. The macro should g...
4,980
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to process VR eye data and render settings. The given code snippet is part of a VR system int...
2,106
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a generic service factory trait and its associated implementation for a specific service builder. The pr...
1,853
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with simulating the Monty Hall problem, a famous probability puzzle. The Monty Hall problem is based on a game show scenar...
1,909
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a custom error type in Rust for a messaging application. The application uses the Megolm cryptographic ratch...
1,681
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple bit manipulation function in Rust. Your task is to complete the implementation of the `bit` fun...
3,613
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple option type in Rust. An option type is a common programming construct that represents either a ...
4,420
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple stack data structure in Rust. A stack is a Last-In-First-Out (LIFO) data structure that support...
2,102
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple benchmarking tool for a Rust project. The code snippet provided is a part of a Rust program tha...
4,765
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a resource matching system for a web application's access control. The system should use a \"star-with\"...
915
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that processes an HTTP response and constructs an appropriate error message based on the resp...
4,167
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust function that processes a list of file paths and returns a modified list based on certain conditions....
2,185
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a BsonParser in Rust, which is capable of parsing a byte stream into a BsonDocument. Bson (Binary JSON) ...
388
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that calculates the sum of all prime numbers within a given range. A prime number is a natura...
654
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a program to parse and process ELF (Executable and Linkable Format) files. The ELF format is commonly us...
709
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a Rust function that takes a parameter `js` of type `JsValue`. The function is intended to return the length of the array i...
1,035
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to convert a vector of bytes into a unique channel ID. The function should take a vector of u...
3,369
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that performs vectorized addition on arrays of unsigned integers. The function should take tw...
50
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a program to manage a directory of textures used in a game engine. The program needs to support various oper...
315
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to read a configuration file based on the XDG Base Directory Specification. The XDG Base Dire...
3,166
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a version control system for a software project. The system needs to support adjusting and managing diff...
3,882
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a CRC (Cyclic Redundancy Check) calculation module in Rust. The provided code snippet is a part of a Rus...
97
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that processes a list of accounts and returns the total balance across all accounts. Each acc...
3,174
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a terminal event handler for a custom terminal application. The terminal event handler has three methods...
1,392
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a memory allocator for a custom heap in Rust. The allocator should support allocation and deallocation o...
4,013
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a Rust library for handling caret and closed interval operations. The library should provide modules for...
3,158
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust module that manages scheduled tasks. The provided code snippet includes some relevant imports and a m...
3,983
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom error handling mechanism for a command-line interface (CLI) application. The provided code snip...
691
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple event handling system for a graphical user interface (GUI) library. The GUI library provides a ...
3,502
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom deserializer for a specific data type in Rust. The deserializer should handle the deserializati...
2,753
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a code snippet that processes input data and populates a grid with certain values. Your task is to complete the implementat...
3,395
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a code snippet in the Rust programming language. Your task is to complete the code by implementing a function that calculat...
363
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple data structure to store and manipulate decimal numbers. Your goal is to create a Rust program t...
2,007
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are working on a project to develop a driver for a USB device. As part of this project, you need to implement a field reader for a sp...
1,109
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust program that processes a given string and performs a specific operation on it. Your program should ta...
327
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to parse a byte slice and determine if it starts with a valid blob. A blob is represented by ...
2,155
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust program that involves serializing and deserializing data using the `serde_yaml` crate. Your goal is t...
1,301
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to resolve an IPNS hash or a domain name using the IPFS (InterPlanetary File System) API. The...
3,465
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust program that involves serializing and deserializing data using the `serde` library. The program will ...
3,077
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple asynchronous document indexing system using Rust's Tokio library. The system will receive docum...
4,343
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom set data structure in Rust. The set should support adding elements, removing elements, checking...
2,031
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple caching system using a HashMap in Rust. Your goal is to create a Cache struct that can store ke...
3,099
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom data structure in Rust that simulates a simplified version of an Option type. The custom data s...
71
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust function that processes a given directory structure and returns a list of all unique file extensions ...
3,325
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple CSV parser in Rust. Your task is to write a function that reads a CSV file and returns a vector...
4,152
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a 2D and 3D measurement library in Rust. The library should provide functionality to calculate the area ...
1,878
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to perform a long-range scan in a space exploration game. The function `l_range_scan` takes t...
4,823
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a data structure to manage cells in a grid-based system. The grid is represented by rows and columns, an...
787
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a Rust module for managing subscriptions to a streaming service. The module should handle errors, define...
1,668
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a rate limiter module for a web application. The rate limiter should restrict the number of requests a c...
3,692
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a custom hashing algorithm in Rust. The algorithm to be implemented is the WyHash hashing algorithm, whi...
234
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a level generator for a game. The provided code snippet is a partial implementation of a `GeometricalLev...
502
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a generic data structure that can store and retrieve values of different types. The data structure shoul...
4,007
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust function that manipulates files. Your function should take a string `new` as input and write its cont...
148
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust program that processes images using the `imagefmt` crate and accepts command-line arguments using the...
3,771
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple MIME type parser in Rust. MIME types are used in various internet protocols to specify the type...
2,631
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a function that filters a list of messages and returns a specific type of message if it exists. The messages...
934
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple game using Rust. The game involves flags, game moves, kinds, and stats. You are provided with a...
3,466
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are given a code snippet that initializes a variable `tick` with the value `50_u16`. Your task is to write a function that takes this...
4,193
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple file selector module in Rust. The module should provide a function to select files based on cer...
3,121
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a logging system in Rust. The provided code snippet includes a simplified version of a logging framework...
4,483
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple stack data structure in Rust. A stack is a Last-In-First-Out (LIFO) data structure that support...
4,297
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a simple web service using the Rust programming language and the `warp` framework. Your goal is to implement...
3,431
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function that constructs a child realm map based on the given component declaration. A child realm map...
1,937
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to prepare a log record header in a logging system. The function `prepare_lrh` takes in five ...
4,353
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a command-line utility that extracts and prints specific information about the machine's hardware. The utili...
2,104
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with simulating the movement of a particle in a 2D space. The particle's position is determined by the following equations...
644
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple layout system for a graphical user interface (GUI) library. The library provides a `Layout` str...
3,409
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a hash map data structure with a remove method. The hash map is represented as a linear probing hash tab...
4,413
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust program that manages time-related functionalities. Your goal is to implement a module for handling ti...
4,356
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a data structure to manage a collection of integers and perform specific operations on them. Your task i...
2,500
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple append buffer data structure in Rust. The `AppendBuffer` struct has a single field `data` of ty...
4,402
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a string manipulation function in Rust. The function should determine whether a given string is entirely...
4,574
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a simple file system using the Rust programming language. Your goal is to implement the `make_dir` function,...
1,901
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a Rust program to manage a simple graph data structure. The program should allow users to add and delete nod...
1,006
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a version control system utility in Rust. Your program should check if a local repository exists, and if...
324
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a function to create a new XKB (X Keyboard Extension) state for a given X11 core keyboard device using t...
3,272
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple command-line application that simulates a basic banking system. The application should allow us...
3,677
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with creating a program to validate passport data based on strict rules. The passport data is represented as a series of k...
1,642
oss_instruct
[ { "role": "system", "content": "You are an expert assistant who solves Rust programming problems and generates correct code." }, { "role": "user", "content": "You are tasked with implementing a simple stack data structure in Rust. Your stack should support the following operations:\n1. `new()`: ...