1 files changed, 12 insertions, 0 deletions
diff --git a/src/paca.mjs b/src/paca.mjs
index c1bead1..6843c20 100644
--- a/src/paca.mjs
+++ b/src/paca.mjs
@@ -121,6 +121,18 @@ const TRANSITION_FNS = {
 			where: "from",
 		},
 	}),
+	"[": ({ out, _state, _context }, _char, _index, _next) => ({
+		out,
+		state: ConcatStep.CLASS,
+		context: {
+			set:   [],
+			range: {
+				from:  [],
+				to:    [],
+				where: "from",
+			},
+		},
+	}),
 };
 
 const stateTransitionOperators = new Set(Object.keys(TRANSITION_FNS));