1 files changed, 25 insertions, 0 deletions

diff --git a/vendor/github.com/hashicorp/hil/ast/stack.go b/vendor/github.com/hashicorp/hil/ast/stack.go
new file mode 100644
index 0000000..bd2bc15
--- /dev/null
+++ b/vendor/github.com/hashicorp/hil/ast/stack.go
@@ -0,0 +1,25 @@
+package ast
+
+// Stack is a stack of Node.
+type Stack struct {
+        stack []Node
+}
+
+func (s *Stack) Len() int {
+        return len(s.stack)
+}
+
+func (s *Stack) Push(n Node) {
+        s.stack = append(s.stack, n)
+}
+
+func (s *Stack) Pop() Node {
+        x := s.stack[len(s.stack)-1]
+        s.stack[len(s.stack)-1] = nil
+        s.stack = s.stack[:len(s.stack)-1]
+        return x
+}
+
+func (s *Stack) Reset() {
+        s.stack = nil
+}