initial commit

1 files changed, 17 insertions, 0 deletions

diff --git a/parser/statefunc.go b/parser/statefunc.go
new file mode 100644
index 0000000..69d7098
--- /dev/null
+++ b/parser/statefunc.go
@@ -0,0 +1,17 @@
+package parser
+
+type stateFunc func(*lexer) stateFunc
+
+type stateStack []stateFunc
+
+func (ss *stateStack) Push(s stateFunc) {
+	*ss = append(*ss, s)
+}
+
+func (ss *stateStack) Pop() (s stateFunc) {
+	if len(*ss) == 0 {
+		return nil
+	}
+	*ss, s = (*ss)[:len(*ss)-1], (*ss)[len(*ss)-1]
+	return s
+}