dont-interface

> go run main.go --file test.go
Among your codebase, there are...
    8 parameters declared in functions, 5 of them are evil! (40.00% typed)
    5 values returned from functions, 3 of them are evil! (40.00% typed)
    3 fields declared in structs, 2 of them are evil! (33.33% typed)
    2 values declared, 1 of them are evil! (50.00% typed)
    3 type aliases introduced, 1 of them are evil! (66.67% typed)
Overall, 42.86% of your types are strictly typed (not interface{}).

dont-interface calculates how many interface{} are declared or used in:

• function parameters, e.g. i1 interface{}, i2 []interface{}, i3 ...interface{}
• function return values, e.g. (interface{}, string)
• struct fields, e.g. i interface{}
• value declarations, e.g. var i interface{}
• type aliases, e.g. type NotInterface interface{}. Note that type I1 interface{ test1() } is not a type alias.

This tiny snippet is partially inspired by Section 4.1.1 of LLVM: A Compilation Framework for Lifelong Program Analysis & Transformation , where the authors investigated to what extent is the LLVM's type speculation correct (and I know this paper have nothing to do with structural typing).

Usage

> go install github.com/Ray-Eldath/dont-interface
> dont-interface --file test.go --file main.go

The Last Thing...

Don't interface{}!

:wink: