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https://github.com/mdempsky/unconvert

Remove unnecessary type conversions from Go source
https://github.com/mdempsky/unconvert

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Remove unnecessary type conversions from Go source

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# About



The unconvert program analyzes Go packages to identify unnecessary

type conversions; i.e., expressions T(x) where x already has type T.



# Install



    go install github.com/mdempsky/unconvert@latest



# Usage



    $ unconvert -v bytes fmt

    GOROOT/src/bytes/reader.go:117:14: unnecessary conversion

                    abs = int64(r.i) + offset

                               ^

    GOROOT/src/fmt/print.go:411:21: unnecessary conversion

            p.fmt.integer(int64(v), 16, unsigned, udigits)

                               ^



# Flags



Using the -v flag, unconvert will also print the source line and a

caret to indicate the unnecessary conversion's position therein.



Using the -apply flag, unconvert will rewrite the Go source files

without the unnecessary type conversions.



Using the -all flag, unconvert will analyze the Go packages under all

possible GOOS/GOARCH combinations, and only identify conversions that

are unnecessary in all cases.



E.g., syscall.Timespec's Sec and Nsec fields are int64 under

linux/amd64 but int32 under linux/386.  An int64(ts.Sec) conversion

that appears in a linux/amd64-only file will be identified as

unnecessary, but it will be preserved if it occurs in a file that's

compiled for both linux/amd64 and linux/386.