diff options
Diffstat (limited to 'vendor/github.com/hashicorp/hil/ast/stack.go')
-rw-r--r-- | vendor/github.com/hashicorp/hil/ast/stack.go | 25 |
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 @@ | |||
1 | package ast | ||
2 | |||
3 | // Stack is a stack of Node. | ||
4 | type Stack struct { | ||
5 | stack []Node | ||
6 | } | ||
7 | |||
8 | func (s *Stack) Len() int { | ||
9 | return len(s.stack) | ||
10 | } | ||
11 | |||
12 | func (s *Stack) Push(n Node) { | ||
13 | s.stack = append(s.stack, n) | ||
14 | } | ||
15 | |||
16 | func (s *Stack) Pop() Node { | ||
17 | x := s.stack[len(s.stack)-1] | ||
18 | s.stack[len(s.stack)-1] = nil | ||
19 | s.stack = s.stack[:len(s.stack)-1] | ||
20 | return x | ||
21 | } | ||
22 | |||
23 | func (s *Stack) Reset() { | ||
24 | s.stack = nil | ||
25 | } | ||