insane reflection premature optimization

tag/tag.go

@@ -4,15 +4,19 @@ import (
 	"fmt"
 	"reflect"
 	"strings"
+	"unicode"
 )
 
 var opts struct {
-	query  string `name:"query" help:"tag query"`
+	Query  string `name:"query" help:"tag query"`
-	invert bool   `name:"invert" help:"invert match"`
+	Invert bool   `name:"invert" help:"invert match"`
 }
 
-func stripDashes(flag string) string {
+func flagToField(flag string) string {
-	return strings.TrimPrefix(flag, "--")
+	s := strings.TrimPrefix(flag, "--")
+	r := []rune(s)
+	r[0] = unicode.ToUpper(r[0])
+	return string(r)
 }
 
 func Tag(args []string) {
@@ -22,7 +26,7 @@ func Tag(args []string) {
 	field := reflect.StructField{}
 	found := false
 	for _, a := range args {
-		field, found = t.FieldByName(stripDashes(a))
+		field, found = t.FieldByName(flagToField(a))
 		if !found {
 			fmt.Printf("%s not found in opts\n", a)
 			return
@@ -33,6 +37,17 @@ func Tag(args []string) {
 	fmt.Printf("field name: %#v\n", tag.Get("name"))
 	fmt.Printf("field help: %#v\n", tag.Get("help"))
 
+	v := reflect.ValueOf(opts)
+	vfield := reflect.Value{}
+	for _, a := range args {
+		vfield = v.FieldByName(flagToField(a))
+		if vfield.IsValid() && vfield.CanSet() && vfield.Kind() == reflect.Bool {
+			vfield.SetBool(true)
+			fmt.Printf("vfield: %#v\n", vfield)
+		}
+	}
+	fmt.Printf("vfield: %#v\n", vfield)
+	fmt.Printf("opts: %#v\n", opts)
 	// for i := 0; i < t.NumField(); i++ {
 	// 	field := t.Field(i)
 	// 	if alias, ok := field.Tag.Lookup("name"); ok {