103 lines
2.5 KiB
Go
103 lines
2.5 KiB
Go
// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package slog
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import (
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"fmt"
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"time"
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)
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// An Attr is a key-value pair.
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type Attr struct {
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Key string
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Value Value
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}
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// String returns an Attr for a string value.
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func String(key, value string) Attr {
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return Attr{key, StringValue(value)}
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}
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// Int64 returns an Attr for an int64.
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func Int64(key string, value int64) Attr {
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return Attr{key, Int64Value(value)}
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}
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// Int converts an int to an int64 and returns
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// an Attr with that value.
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func Int(key string, value int) Attr {
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return Int64(key, int64(value))
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}
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// Uint64 returns an Attr for a uint64.
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func Uint64(key string, v uint64) Attr {
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return Attr{key, Uint64Value(v)}
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}
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// Float64 returns an Attr for a floating-point number.
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func Float64(key string, v float64) Attr {
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return Attr{key, Float64Value(v)}
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}
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// Bool returns an Attr for a bool.
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func Bool(key string, v bool) Attr {
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return Attr{key, BoolValue(v)}
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}
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// Time returns an Attr for a time.Time.
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// It discards the monotonic portion.
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func Time(key string, v time.Time) Attr {
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return Attr{key, TimeValue(v)}
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}
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// Duration returns an Attr for a time.Duration.
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func Duration(key string, v time.Duration) Attr {
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return Attr{key, DurationValue(v)}
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}
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// Group returns an Attr for a Group Value.
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// The first argument is the key; the remaining arguments
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// are converted to Attrs as in [Logger.Log].
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//
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// Use Group to collect several key-value pairs under a single
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// key on a log line, or as the result of LogValue
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// in order to log a single value as multiple Attrs.
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func Group(key string, args ...any) Attr {
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return Attr{key, GroupValue(argsToAttrSlice(args)...)}
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}
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func argsToAttrSlice(args []any) []Attr {
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var (
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attr Attr
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attrs []Attr
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)
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for len(args) > 0 {
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attr, args = argsToAttr(args)
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attrs = append(attrs, attr)
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}
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return attrs
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}
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// Any returns an Attr for the supplied value.
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// See [Value.AnyValue] for how values are treated.
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func Any(key string, value any) Attr {
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return Attr{key, AnyValue(value)}
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}
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// Equal reports whether a and b have equal keys and values.
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func (a Attr) Equal(b Attr) bool {
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return a.Key == b.Key && a.Value.Equal(b.Value)
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}
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func (a Attr) String() string {
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return fmt.Sprintf("%s=%s", a.Key, a.Value)
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}
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// isEmpty reports whether a has an empty key and a nil value.
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// That can be written as Attr{} or Any("", nil).
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func (a Attr) isEmpty() bool {
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return a.Key == "" && a.Value.num == 0 && a.Value.any == nil
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}
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