some deletions

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / xerrors@v0.0.0-20200804184101-5ec99f83aff1 / wrap.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/xerrors@v0.0.0-20200804184101-5ec99f83aff1/wrap.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/xerrors@v0.0.0-20200804184101-5ec99f83aff1/wrap.go
deleted file mode 100644 (file)
index 9a3b510..0000000
--- a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/xerrors@v0.0.0-20200804184101-5ec99f83aff1/wrap.go
+++ /dev/null
@@ -1,106 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package xerrors
-
-import (
-       "reflect"
-)
-
-// A Wrapper provides context around another error.
-type Wrapper interface {
-       // Unwrap returns the next error in the error chain.
-       // If there is no next error, Unwrap returns nil.
-       Unwrap() error
-}
-
-// Opaque returns an error with the same error formatting as err
-// but that does not match err and cannot be unwrapped.
-func Opaque(err error) error {
-       return noWrapper{err}
-}
-
-type noWrapper struct {
-       error
-}
-
-func (e noWrapper) FormatError(p Printer) (next error) {
-       if f, ok := e.error.(Formatter); ok {
-               return f.FormatError(p)
-       }
-       p.Print(e.error)
-       return nil
-}
-
-// Unwrap returns the result of calling the Unwrap method on err, if err implements
-// Unwrap. Otherwise, Unwrap returns nil.
-func Unwrap(err error) error {
-       u, ok := err.(Wrapper)
-       if !ok {
-               return nil
-       }
-       return u.Unwrap()
-}
-
-// Is reports whether any error in err's chain matches target.
-//
-// An error is considered to match a target if it is equal to that target or if
-// it implements a method Is(error) bool such that Is(target) returns true.
-func Is(err, target error) bool {
-       if target == nil {
-               return err == target
-       }
-
-       isComparable := reflect.TypeOf(target).Comparable()
-       for {
-               if isComparable && err == target {
-                       return true
-               }
-               if x, ok := err.(interface{ Is(error) bool }); ok && x.Is(target) {
-                       return true
-               }
-               // TODO: consider supporing target.Is(err). This would allow
-               // user-definable predicates, but also may allow for coping with sloppy
-               // APIs, thereby making it easier to get away with them.
-               if err = Unwrap(err); err == nil {
-                       return false
-               }
-       }
-}
-
-// As finds the first error in err's chain that matches the type to which target
-// points, and if so, sets the target to its value and returns true. An error
-// matches a type if it is assignable to the target type, or if it has a method
-// As(interface{}) bool such that As(target) returns true. As will panic if target
-// is not a non-nil pointer to a type which implements error or is of interface type.
-//
-// The As method should set the target to its value and return true if err
-// matches the type to which target points.
-func As(err error, target interface{}) bool {
-       if target == nil {
-               panic("errors: target cannot be nil")
-       }
-       val := reflect.ValueOf(target)
-       typ := val.Type()
-       if typ.Kind() != reflect.Ptr || val.IsNil() {
-               panic("errors: target must be a non-nil pointer")
-       }
-       if e := typ.Elem(); e.Kind() != reflect.Interface && !e.Implements(errorType) {
-               panic("errors: *target must be interface or implement error")
-       }
-       targetType := typ.Elem()
-       for err != nil {
-               if reflect.TypeOf(err).AssignableTo(targetType) {
-                       val.Elem().Set(reflect.ValueOf(err))
-                       return true
-               }
-               if x, ok := err.(interface{ As(interface{}) bool }); ok && x.As(target) {
-                       return true
-               }
-               err = Unwrap(err)
-       }
-       return false
-}
-
-var errorType = reflect.TypeOf((*error)(nil)).Elem()