Add back ValueFunc

Author: nhooyr

slog.go

@@ -25,6 +25,14 @@ type Value interface {
 	LogValue() interface{}
 }
 
+// ValueFunc is a convenient function wrapper around Value.
+type ValueFunc func() interface{}
+
+// LogValue implements Value.
+func (v ValueFunc) LogValue() interface{} {
+	return v()
+}
+
 type componentField string
 
 func (c componentField) LogKey() string        { panic("never called") }

slogval/reflect.go

@@ -16,7 +16,6 @@ import (
 // that would like to only use the reflection based
 // converter for itself and ignore interfaces like error
 // or fmt.Stringer.
-// TODO add back ValueFunc
 type Reflector interface {
 	LogWithReflect()
 }