1 files changed, 22 insertions, 0 deletions
diff --git a/pkg/compiler/check.go b/pkg/compiler/check.go
index b5ced7a13..00695b6b1 100644
--- a/pkg/compiler/check.go
+++ b/pkg/compiler/check.go
@@ -20,6 +20,7 @@ func (comp *compiler) typecheck() {
 	comp.checkComments()
 	comp.checkDirectives()
 	comp.checkNames()
+	comp.checkFlags()
 	comp.checkFields()
 	comp.checkTypedefs()
 	comp.checkTypes()
@@ -156,6 +157,27 @@ func (comp *compiler) checkNames() {
 	}
 }
 
+func (comp *compiler) checkFlags() {
+	checkFlagsGeneric[*ast.IntFlags, *ast.Int](comp, comp.intFlags)
+	checkFlagsGeneric[*ast.StrFlags, *ast.String](comp, comp.strFlags)
+}
+
+func checkFlagsGeneric[F ast.Flags[V], V ast.FlagValue](comp *compiler, allFlags map[string]F) {
+	for name, flags := range allFlags {
+		inConstIdent := true
+		for _, val := range flags.GetValues() {
+			if _, ok := allFlags[val.GetName()]; ok {
+				inConstIdent = false
+			} else {
+				if !inConstIdent {
+					comp.error(flags.GetPos(), "flags identifier not at the end in %v definition", name)
+					break
+				}
+			}
+		}
+	}
+}
+
 func (comp *compiler) checkFields() {
 	for _, decl := range comp.desc.Nodes {
 		switch n := decl.(type) {