Goals and non-goals
Inko has a set of goals it wants to achieve, and certain things we explicitly don't want to implement/provide, which we list below.
This is a list of goals, and as such some goals have yet to be implemented.
For the standard library we're taking a "batteries included" approach, providing a wide range of functionality as part of the standard library, reducing the amount of third-party packages needed.
An easy to understand type system
While a sophisticated type system may allow for more checks to be done at compile-time instead of runtime, it also increases the complexity. Inko instead aims to provide a type system that balances ease of use, correctness, and compile-time performance, instead of focusing entirely on (for example) correctness.
As an example, support for (generic) associated types and higher-kinded types is an explicit non-goal for Inko.
A balance between compile-time and runtime performance
Instead of favouring runtime performance over compile-time performance, Inko tries to provide a good balance between the two. For improved runtime performance the compiler supports the option to enable more aggressive optimisations at the cost of compile times, should you truly need this.
Memory safety, without the mental overhead
Inko programs should be memory safe, but without the compile-time complexity associated with other languages (e.g. Rust). To achieve this, Inko performs some work at runtime to ensure your program is correct (on top of the work done at compile-time of course). This means Inko might not be suitable for all types of applications, but it should make it much easier to work with Inko.
Cross-compiling your Inko program should be easy, and not require additional software aside from the absolute essentials (e.g. a linker supporting the target platform).
Use Inko as much as possible
Drawing inspiration from Java, Rubinius and Smalltalk, we aim to write as much code in Inko as possible, instead of glueing together a collection of C libraries. This helps us achieve some of our other goals, such as easier cross-compilation and memory safety, and makes debugging Inko programs easier as you only have to debug code written in one language.
Sometimes you just have to use a C library and that's OK, but it shouldn't be the default approach.
A simple package manager
Inko's package manager aims to be simple and easy to use. To achieve this, it won't support features found elsewhere such as complex version requirements. In addition, it will only support minimal version selection rather than using a complex SAT solver.
Concurrency that's easy to use
We want it to be easy to write concurrent programs, but without the complexity/mess of contemporary solutions such as async/await. For example, function colouring isn't a thing in Inko, and unlike Go, Inko's approach to concurrency makes race conditions impossible.
Simple and stable syntax
Inko's syntax aims to be simple to understand by both humans and computers. In general we prefer to implement features using regular types and methods, rather than adding new syntax.
Once Inko reaches version 1.0.0, the goal is to freeze the syntax for the foreseeable future. This makes it easier to write tools such as code formatters and linters, as syntax changes would be rare.
Fewer settings and better defaults
Instead of providing dozens of settings to tweak the behaviour of Inko programs, we aim to provide defaults that are good enough for 95% of all use cases. For the remaining 5% we'd prefer to first develop a better understanding of the use cases and gather feedback from the community, before adding a new setting of sorts.
Compiling C code when installing a package
Inko's package manager focuses on Inko source code, and will not include the ability to compile C source code (or any other language for that matter) into a library as part of a package's installation process. Not only would this slow down installing of packages, it also poses a significant security risk, and complicates the process of distributing Inko code.
Instead, we believe it's best to avoid using C as much as possible, and only use pre-installed libraries (using your system's package manager) when you have no other option.
Compile-time code execution
Compile-time function execution, macros and related features are explicitly not desired. While such features can be useful, they complicate the language and compiler, can result in a significant increase of compilation timings, and can make debugging a lot more difficult.
Instead, we believe generating code ahead of time is a better solution. While such an approach incurs a cost, this cost is only relevant when generating the code.
Using Inko from other languages
Inko's runtime makes it difficult to expose Inko programs through a C interface, thus making it difficult to use Inko from other languages. Even if this wasn't difficult, it's not something we're interested in as we'd rather replace those languages with Inko, at least as much as possible.
Low-level memory operations
Inko is explicitly not a systems language, and this means it will never (publicly) support low-level memory operations, such as raw memory allocations, pointers, custom allocators, and other features typically found in systems languages.
A central package database
Hosting a central package database such as RubyGems is incredibly costly, and we don't have the resources to provide such a service. Instead, Inko's package manager is decentralised. To make finding Inko packages easier, we'll provide a package index at some point in the future.
Supporting every platform under the sun
Many operating systems/platforms exist today, but supporting all them is explicitly not a goal. Instead, Inko focuses on mainstream platforms such as Linux and the various BSDs. This means we probably won't accept any patches that add support for e.g. Redox until it becomes more commonly used.
Embedded platforms are not a goal for the time being, but might be in the future.