37 lines
1.2 KiB
Plaintext
37 lines
1.2 KiB
Plaintext
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About:
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The unconvert program analyzes Go packages to identify unnecessary
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type conversions; i.e., expressions T(x) where x already has type T.
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Install:
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$ go get github.com/mdempsky/unconvert
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Usage:
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$ unconvert -v bytes fmt
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GOROOT/src/bytes/reader.go:117:14: unnecessary conversion
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abs = int64(r.i) + offset
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^
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GOROOT/src/fmt/print.go:411:21: unnecessary conversion
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p.fmt.integer(int64(v), 16, unsigned, udigits)
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^
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Flags:
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Using the -v flag, unconvert will also print the source line and a
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caret to indicate the unnecessary conversion's position therein.
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Using the -apply flag, unconvert will rewrite the Go source files
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without the unnecessary type conversions.
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Using the -all flag, unconvert will analyze the Go packages under all
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possible GOOS/GOARCH combinations, and only identify conversions that
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are unnecessary in all cases.
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E.g., syscall.Timespec's Sec and Nsec fields are int64 under
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linux/amd64 but int32 under linux/386. An int64(ts.Sec) conversion
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that appears in a linux/amd64-only file will be identified as
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unnecessary, but it will be preserved if it occurs in a file that's
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compiled for both linux/amd64 and linux/386.
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