more tinkering.

internal/gentools/commalist.go

@@ -1,6 +1,9 @@
 package gentools
 
-import "fmt"
+import (
+	"fmt"
+	"strings"
+)
 
 func FmtSprintArray[T any](arr []T) []string {
 	res := make([]string, len(arr))
@@ -10,3 +13,7 @@ func FmtSprintArray[T any](arr []T) []string {
 
 	return res
 }
+
+func FmtSprintArrayJoin[T any](arr []T, sep string) string {
+	return strings.Join(FmtSprintArray(arr), sep)
+}

internal/gentools/flagstr.go

@@ -0,0 +1,18 @@
+package gentools
+
+import "strings"
+
+func FlagString[T ~uint32](value T, flags []T, names []string) string {
+	if value == 0 {
+		return "(none)"
+	}
+
+	parts := make([]string, 0, len(flags))
+	for i, flag := range flags {
+		if value&flag == flag {
+			parts = append(parts, names[i])
+		}
+	}
+
+	return strings.Join(parts, "|")
+}