Moshi

Moshi is the pattern in Chinese （模式）. This package is the refactor of MLStyle with

• more correct pattern language for pattern match with @match
• type-stable algebra data type/tagged union with generics via @data
• traits, derive macro @derive from rust

Moshi is a   Julia Language   package. To install Moshi, please open Julia's interactive session (known as REPL) and press ] key in the REPL to use the package mode, then type the following command

pkg> add Moshi

Here is a quick example of defining a simple algebraic data type:

using Moshi.Data: @data

@data Message begin
    Quit
    struct Move
        x::Int
        y::Int
    end

    Write(String)
    ChangeColor(Int, Int, Int)
end

For pattern matching, if you already used MLStyle, the syntax is very similar:

using Moshi.Match: @match

@match [1.0, 2, 3] begin
    [1, xs::Float64...] => xs
end

@match (1, 2.0, "a") begin
    (1, x::Int, y::String) => x
    (1, x::Real, y::String) => y
end

MIT License