40 lines
1.1 KiB
Go
40 lines
1.1 KiB
Go
// Copyright 2022 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.
|
|
|
|
//go:build go1.20
|
|
|
|
package slog
|
|
|
|
import "unsafe"
|
|
|
|
type (
|
|
stringptr *byte // used in Value.any when the Value is a string
|
|
groupptr *Attr // used in Value.any when the Value is a []Attr
|
|
)
|
|
|
|
// StringValue returns a new Value for a string.
|
|
func StringValue(value string) Value {
|
|
return Value{num: uint64(len(value)), any: stringptr(unsafe.StringData(value))}
|
|
}
|
|
|
|
// GroupValue returns a new Value for a list of Attrs.
|
|
// The caller must not subsequently mutate the argument slice.
|
|
func GroupValue(as ...Attr) Value {
|
|
return Value{num: uint64(len(as)), any: groupptr(unsafe.SliceData(as))}
|
|
}
|
|
|
|
// String returns Value's value as a string, formatted like fmt.Sprint. Unlike
|
|
// the methods Int64, Float64, and so on, which panic if v is of the
|
|
// wrong kind, String never panics.
|
|
func (v Value) String() string {
|
|
if sp, ok := v.any.(stringptr); ok {
|
|
return unsafe.String(sp, v.num)
|
|
}
|
|
return string(v.append(nil))
|
|
}
|
|
|
|
func (v Value) str() string {
|
|
return unsafe.String(v.any.(stringptr), v.num)
|
|
}
|