Crate cargo_leet

The main aim of cargo-leet is to make it easier to develop solutions to leetcode problems locally on your machine. And as such it is composed of two parts, a tool to help with code download and testing setup, and helper code to allow running solutions developed locally.

Tool

The cargo-leet subcommand is a command line tool developed with clap and the associated help is probably the best way to get an idea of how to use the tool. Screenshots of the help can be found in the readme on github. For the sake of maintainability features added will be documented there instead of always needing to update multiple places.

Leetcode Environment Support

cargo-leet also includes helper code with structs and traits to simulate the environment that your code would run in on the leetcode servers so that you are able to run tests on your code locally. It also provides a few extra types that facilitate testing especially as it relates to creating test cases from the text provided by leetcode.

Feature flags

cargo-leet uses feature flags to control which code gets compiled based on how the crate is being used. This is especially important for the code imported in the solution repository as this repo may be using a much older version of the rust toolchain due to the fact that leetcode uses a much older version on their servers and some users may want to use the same version to ensure their code will always work upon upload. However, because it is such an old version many of the crates used in the development of the tool are not able to be compiled with that toolchain and as such they being only compiled behind a feature flag makes that a non-issue. It also allows users to not compile the code only needed to support leetcode solution development when working on or using the tool.

• default: Enables the leet_env feature as this is the most common use case
• leet_env: Includes the code for working on leetcode problem solutions
• tool: Enables the code and dependencies used to create the tool.

Structs

• ListHead
  Wrapper class to make handling empty lists easier
• ListNode
  Definition for singly-linked list.
• TreeNode
  Definition for a binary tree node.
• TreeRoot
  Wrapper class to make handling empty trees easier and building of trees easier via From impls