1 files changed, 21 insertions, 0 deletions
diff --git a/subex/subexstate.go b/subex/subexstate.go
index 8f27a10..3bcbdee 100644
--- a/subex/subexstate.go
+++ b/subex/subexstate.go
@@ -43,6 +43,9 @@ func (state SubexGroupState) epsilon(aux auxiliaryState) []SubexBranch {
 		},
 	}
 }
+func (state SubexGroupState) String() string {
+	return fmt.Sprintf("{%T %p, %T %p}", state.first, state.first, state.second, state.second)
+}
 
 type SubexCopyState struct {
 	next SubexState
@@ -83,6 +86,24 @@ func (state SubexCopyRuneState) String() string {
 	return fmt.Sprintf("SubexCopyRuneState[%v]", state.filter)
 }
 
+type SubexCopyNumberState struct {
+	next SubexState
+	filter numberFilter
+}
+func (state SubexCopyNumberState) eat(aux auxiliaryState, edible walk.Edible) []SubexBranch {
+	number, isNumber := edible.(walk.NumberValue)
+	if !isNumber || !state.filter.numberFilter(float64(number)) {
+		return nil
+	}
+	return []SubexBranch {{
+		state: state.next,
+		aux: aux.topAppend([]walk.Value {number}),
+	}}
+}
+func (state SubexCopyNumberState) accepting(aux auxiliaryState) []OutputStack {
+	return nil
+}
+
 // Just pushes to the OutputStack and hands over to the next state
 // Used to capture the output of the state being handed over to
 type SubexCaptureBeginState struct {