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Diffstat (limited to 'vendor/dario.cat/mergo/map.go')
-rw-r--r-- | vendor/dario.cat/mergo/map.go | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/vendor/dario.cat/mergo/map.go b/vendor/dario.cat/mergo/map.go deleted file mode 100644 index b50d5c2..0000000 --- a/vendor/dario.cat/mergo/map.go +++ /dev/null @@ -1,178 +0,0 @@ -// Copyright 2014 Dario Castañé. All rights reserved. -// Copyright 2009 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. - -// Based on src/pkg/reflect/deepequal.go from official -// golang's stdlib. - -package mergo - -import ( - "fmt" - "reflect" - "unicode" - "unicode/utf8" -) - -func changeInitialCase(s string, mapper func(rune) rune) string { - if s == "" { - return s - } - r, n := utf8.DecodeRuneInString(s) - return string(mapper(r)) + s[n:] -} - -func isExported(field reflect.StructField) bool { - r, _ := utf8.DecodeRuneInString(field.Name) - return r >= 'A' && r <= 'Z' -} - -// Traverses recursively both values, assigning src's fields values to dst. -// The map argument tracks comparisons that have already been seen, which allows -// short circuiting on recursive types. -func deepMap(dst, src reflect.Value, visited map[uintptr]*visit, depth int, config *Config) (err error) { - overwrite := config.Overwrite - if dst.CanAddr() { - addr := dst.UnsafeAddr() - h := 17 * addr - seen := visited[h] - typ := dst.Type() - for p := seen; p != nil; p = p.next { - if p.ptr == addr && p.typ == typ { - return nil - } - } - // Remember, remember... - visited[h] = &visit{typ, seen, addr} - } - zeroValue := reflect.Value{} - switch dst.Kind() { - case reflect.Map: - dstMap := dst.Interface().(map[string]interface{}) - for i, n := 0, src.NumField(); i < n; i++ { - srcType := src.Type() - field := srcType.Field(i) - if !isExported(field) { - continue - } - fieldName := field.Name - fieldName = changeInitialCase(fieldName, unicode.ToLower) - if v, ok := dstMap[fieldName]; !ok || (isEmptyValue(reflect.ValueOf(v), !config.ShouldNotDereference) || overwrite) { - dstMap[fieldName] = src.Field(i).Interface() - } - } - case reflect.Ptr: - if dst.IsNil() { - v := reflect.New(dst.Type().Elem()) - dst.Set(v) - } - dst = dst.Elem() - fallthrough - case reflect.Struct: - srcMap := src.Interface().(map[string]interface{}) - for key := range srcMap { - config.overwriteWithEmptyValue = true - srcValue := srcMap[key] - fieldName := changeInitialCase(key, unicode.ToUpper) - dstElement := dst.FieldByName(fieldName) - if dstElement == zeroValue { - // We discard it because the field doesn't exist. - continue - } - srcElement := reflect.ValueOf(srcValue) - dstKind := dstElement.Kind() - srcKind := srcElement.Kind() - if srcKind == reflect.Ptr && dstKind != reflect.Ptr { - srcElement = srcElement.Elem() - srcKind = reflect.TypeOf(srcElement.Interface()).Kind() - } else if dstKind == reflect.Ptr { - // Can this work? I guess it can't. - if srcKind != reflect.Ptr && srcElement.CanAddr() { - srcPtr := srcElement.Addr() - srcElement = reflect.ValueOf(srcPtr) - srcKind = reflect.Ptr - } - } - - if !srcElement.IsValid() { - continue - } - if srcKind == dstKind { - if err = deepMerge(dstElement, srcElement, visited, depth+1, config); err != nil { - return - } - } else if dstKind == reflect.Interface && dstElement.Kind() == reflect.Interface { - if err = deepMerge(dstElement, srcElement, visited, depth+1, config); err != nil { - return - } - } else if srcKind == reflect.Map { - if err = deepMap(dstElement, srcElement, visited, depth+1, config); err != nil { - return - } - } else { - return fmt.Errorf("type mismatch on %s field: found %v, expected %v", fieldName, srcKind, dstKind) - } - } - } - return -} - -// Map sets fields' values in dst from src. -// src can be a map with string keys or a struct. dst must be the opposite: -// if src is a map, dst must be a valid pointer to struct. If src is a struct, -// dst must be map[string]interface{}. -// It won't merge unexported (private) fields and will do recursively -// any exported field. -// If dst is a map, keys will be src fields' names in lower camel case. -// Missing key in src that doesn't match a field in dst will be skipped. This -// doesn't apply if dst is a map. -// This is separated method from Merge because it is cleaner and it keeps sane -// semantics: merging equal types, mapping different (restricted) types. -func Map(dst, src interface{}, opts ...func(*Config)) error { - return _map(dst, src, opts...) -} - -// MapWithOverwrite will do the same as Map except that non-empty dst attributes will be overridden by -// non-empty src attribute values. -// Deprecated: Use Map(…) with WithOverride -func MapWithOverwrite(dst, src interface{}, opts ...func(*Config)) error { - return _map(dst, src, append(opts, WithOverride)...) -} - -func _map(dst, src interface{}, opts ...func(*Config)) error { - if dst != nil && reflect.ValueOf(dst).Kind() != reflect.Ptr { - return ErrNonPointerArgument - } - var ( - vDst, vSrc reflect.Value - err error - ) - config := &Config{} - - for _, opt := range opts { - opt(config) - } - - if vDst, vSrc, err = resolveValues(dst, src); err != nil { - return err - } - // To be friction-less, we redirect equal-type arguments - // to deepMerge. Only because arguments can be anything. - if vSrc.Kind() == vDst.Kind() { - return deepMerge(vDst, vSrc, make(map[uintptr]*visit), 0, config) - } - switch vSrc.Kind() { - case reflect.Struct: - if vDst.Kind() != reflect.Map { - return ErrExpectedMapAsDestination - } - case reflect.Map: - if vDst.Kind() != reflect.Struct { - return ErrExpectedStructAsDestination - } - default: - return ErrNotSupported - } - return deepMap(vDst, vSrc, make(map[uintptr]*visit), 0, config) -} |