Add Transform.Option helper method (#59)

Currently there is no easy way to create non-reentrant transformers
where they do not recursively apply on their own output.
You could check for the Transformer name, but the API does not
require the names to be unique.

The only way to write a helper to do this is to generate some obscure
name that is guaranteed to probabilistic never have a conflict.

A better approach is to simply return the original Option
as returned by the Transformer constructor.
Thus, users can rely on == to check if a Transform step exactly
matches a Transformer that they created.

It would be useful to a non-reentrant transformer to cmpopts,
but that can be a future addition. It will also need a better name.
2 files changed
tree: 3210259d4fb73b604f3cb5d2ac455b2d3a7a00d4
  1. .travis.yml
  2. CONTRIBUTING.md
  3. LICENSE
  4. README.md
  5. cmp/
README.md

Package for equality of Go values

GoDoc Build Status

This package is intended to be a more powerful and safer alternative to reflect.DeepEqual for comparing whether two values are semantically equal.

The primary features of cmp are:

  • When the default behavior of equality does not suit the needs of the test, custom equality functions can override the equality operation. For example, an equality function may report floats as equal so long as they are within some tolerance of each other.

  • Types that have an Equal method may use that method to determine equality. This allows package authors to determine the equality operation for the types that they define.

  • If no custom equality functions are used and no Equal method is defined, equality is determined by recursively comparing the primitive kinds on both values, much like reflect.DeepEqual. Unlike reflect.DeepEqual, unexported fields are not compared by default; they result in panics unless suppressed by using an Ignore option (see cmpopts.IgnoreUnexported) or explicitly compared using the AllowUnexported option.

See the GoDoc documentation for more information.

This is not an official Google product.

Install

go get -u github.com/google/go-cmp/cmp

License

BSD - See LICENSE file