Repository: uber-go/zap
File: error.go (Go)

Code before:
// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package zap

import (
	"go.uber.org/zap/zapcore"
	"sync"
)

var _errArrayElemPool = sync.Pool{New: func() interface{} {
	return &errArrayElem{}
}}

// Error is shorthand for the common idiom NamedError("error", err).
func Error(err error) Field {
	return NamedError("error", err)
}

// NamedError constructs a field that lazily stores err.Error() under the
// provided key. Errors which also implement fmt.Formatter (like those produced
// by github.com/pkg/errors) will also have their verbose representation stored
// under key+"Verbose". If passed a nil error, the field is a no-op.
//
// For the common case in which the key is simply "error", the Error function
// is shorter and less repetitive.
func NamedError(key string, err error) Field {
	if err == nil {
		return Skip()
	}
	return Field{Key: key, Type: zapcore.ErrorType, Interface: err}
}

type errArray []error

Review comment (suggestion):
this doesn't need to change

```suggestion
	"sync"

	"go.uber.org/zap/zapcore"
)
```

Code after:
// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package zap

import (
	"sync"

	"go.uber.org/zap/zapcore"
)

var _errArrayElemPool = sync.Pool{New: func() interface{} {
	return &errArrayElem{}
}}

// Error is shorthand for the common idiom NamedError("error", err).
func Error(err error) Field {
	return NamedError("error", err)
}

// NamedError constructs a field that lazily stores err.Error() under the
// provided key. Errors which also implement fmt.Formatter (like those produced
// by github.com/pkg/errors) will also have their verbose representation stored
// under key+"Verbose". If passed a nil error, the field is a no-op.
//
// For the common case in which the key is simply "error", the Error function
// is shorter and less repetitive.
func NamedError(key string, err error) Field {
	if err == nil {
		return Skip()
	}
	return Field{Key: key, Type: zapcore.ErrorType, Interface: err}
}