fix(rpn): define OperatorRegistryProvider interface to fix DIP violation (task nk)

2 files changed, 10 insertions, 1 deletions

diff --git a/internal/rpn/operations_interfaces.go b/internal/rpn/operations_interfaces.go
index e659644..f317f8a 100644
--- a/internal/rpn/operations_interfaces.go
+++ b/internal/rpn/operations_interfaces.go
@@ -152,6 +152,15 @@ type OperationsProvider interface {
 	CustomMetricManager
 }
 
+// OperatorRegistryProvider defines the methods RPN needs from the operator registry.
+// RPN depends on this interface (DIP) rather than the concrete *OperatorRegistry type.
+type OperatorRegistryProvider interface {
+	IsStandardOperator(token string) bool
+	IsHyperOperator(token string) bool
+	HandleStandardOperator(stack *Stack, token string) (string, bool, error)
+	HandleHyperOperator(stack *Stack, token string) (string, bool, error)
+}
+
 // Operator implementations are split across focused sub-interfaces
 // (ArithmeticOperator, LogarithmicOperator, MetricOperator, BooleanOperator,
 // HyperOperator, StackOperator, VariableOperator, ConstantOperator,
diff --git a/internal/rpn/rpn_state.go b/internal/rpn/rpn_state.go
index a42372a..f2cc4ed 100644
--- a/internal/rpn/rpn_state.go
+++ b/internal/rpn/rpn_state.go
@@ -15,7 +15,7 @@ type RPN struct {
 	vars           VariableStore
 	consts         ConstantsProvider
 	ops            OperationsProvider
-	opRegistry     *OperatorRegistry
+	opRegistry     OperatorRegistryProvider
 	maxStack       int
 	currentStack   *Stack
 }