| commit | 98232909528519e571b2e69fbe546b6ef35f5780 | [log] [tgz] |
|---|---|---|
| author | Joe Tsai <joetsai@digital-static.net> | Fri Nov 03 08:45:06 2017 -0700 |
| committer | GitHub <noreply@github.com> | Fri Nov 03 08:45:06 2017 -0700 |
| tree | abc0f2a35e00da407a01d9c11439c3e040b80a32 | |
| parent | 7ffe1921f7d789634416694ae7145ebbc1ac82b2 [diff] |
Add implicit filter to Transformers (#29) Declaring a transformer "func(T) T" where T is a concrete type is a common transformation. However, this is currently problematic as the transformation now infinitely applies to itself recursively. In order to allow this form of transformation, add a simple (but subtle) filter to Transformers where a Transformer can only apply if that specific Transformer does not already exist within the tail of the current Path since the last non-Transform step. This rule does not prevent more advance usages of Transformers where the user *does* want the Transformer to apply recursively to previously transformed output, since those situations are almost always followed by some path step that is *not* a transformation (e.g., pointer indirect, slice indexing, etc).
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 explictly compared using the AllowUnexported option.
See the GoDoc documentation for more information.
This is not an official Google product.
go get -u github.com/google/go-cmp/cmp
BSD - See LICENSE file