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// 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.
package slog
import "context"
type contextKey struct{}
// NewContext returns a context that contains the given Logger.
// Use FromContext to retrieve the Logger.
func NewContext(ctx context.Context, l Logger) context.Context {
return context.WithValue(ctx, contextKey{}, l)
}
// FromContext returns the Logger stored in ctx by NewContext, or the default
// Logger if there is none.
func FromContext(ctx context.Context) Logger {
if l, ok := ctx.Value(contextKey{}).(Logger); ok {
return l
}
return Default()
}
// Ctx retrieves a Logger from the given context using FromContext. Then it adds
// the given context to the Logger using WithContext and returns the result.
func Ctx(ctx context.Context) Logger {
return FromContext(ctx).WithContext(ctx)
}
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