mirror of https://github.com/restic/restic.git
45 lines
1.6 KiB
Markdown
45 lines
1.6 KiB
Markdown
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# Package for equality of Go values
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[][godoc]
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[][travis]
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This package is intended to be a more powerful and safer alternative to
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`reflect.DeepEqual` for comparing whether two values are semantically equal.
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The primary features of `cmp` are:
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* When the default behavior of equality does not suit the needs of the test,
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custom equality functions can override the equality operation.
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For example, an equality function may report floats as equal so long as they
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are within some tolerance of each other.
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* Types that have an `Equal` method may use that method to determine equality.
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This allows package authors to determine the equality operation for the types
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that they define.
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* If no custom equality functions are used and no `Equal` method is defined,
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equality is determined by recursively comparing the primitive kinds on both
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values, much like `reflect.DeepEqual`. Unlike `reflect.DeepEqual`, unexported
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fields are not compared by default; they result in panics unless suppressed
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by using an `Ignore` option (see `cmpopts.IgnoreUnexported`) or explictly
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compared using the `AllowUnexported` option.
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See the [GoDoc documentation][godoc] for more information.
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This is not an official Google product.
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[godoc]: https://godoc.org/github.com/google/go-cmp/cmp
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[travis]: https://travis-ci.org/google/go-cmp
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## Install
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```
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go get -u github.com/google/go-cmp/cmp
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```
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## License
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BSD - See [LICENSE][license] file
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[license]: https://github.com/google/go-cmp/blob/master/LICENSE
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