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https://github.com/open-telemetry/opentelemetry-go.git
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a8b9ddc7f6
* attribute: fix slice related function bug Signed-off-by: Ziqi Zhao <zhaoziqi9146@gmail.com> Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com> Co-authored-by: Chester Cheung <cheung.zhy.csu@gmail.com>
46 lines
1.5 KiB
Go
46 lines
1.5 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/*
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Package attribute provide several helper functions for some commonly used
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logic of processing attributes.
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*/
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package attribute // import "go.opentelemetry.io/otel/internal/attribute"
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import (
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"reflect"
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)
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// SliceValue convert a slice into an array with same elements as slice.
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func SliceValue[T bool | int64 | float64 | string](v []T) any {
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var zero T
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cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeOf(zero)))
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copy(cp.Elem().Slice(0, len(v)).Interface().([]T), v)
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return cp.Elem().Interface()
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}
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// AsSlice convert an array into a slice into with same elements as array.
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func AsSlice[T bool | int64 | float64 | string](v any) []T {
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rv := reflect.ValueOf(v)
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if rv.Type().Kind() != reflect.Array {
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return nil
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}
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var zero T
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correctLen := rv.Len()
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correctType := reflect.ArrayOf(correctLen, reflect.TypeOf(zero))
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cpy := reflect.New(correctType)
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_ = reflect.Copy(cpy.Elem(), rv)
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return cpy.Elem().Slice(0, correctLen).Interface().([]T)
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}
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