From a90b6efded49abcfa2516db794d7875b0396f558 Mon Sep 17 00:00:00 2001
From: Jesse Duffield <jessedduffield@gmail.com>
Date: Fri, 28 Jan 2022 20:44:36 +1100
Subject: start refactoring gui

---
 pkg/utils/string_stack.go | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 pkg/utils/string_stack.go

(limited to 'pkg/utils')

diff --git a/pkg/utils/string_stack.go b/pkg/utils/string_stack.go
new file mode 100644
index 000000000..c2d18c70c
--- /dev/null
+++ b/pkg/utils/string_stack.go
@@ -0,0 +1,27 @@
+package utils
+
+type StringStack struct {
+	stack []string
+}
+
+func (self *StringStack) Push(s string) {
+	self.stack = append(self.stack, s)
+}
+
+func (self *StringStack) Pop() string {
+	if len(self.stack) == 0 {
+		return ""
+	}
+	n := len(self.stack) - 1
+	last := self.stack[n]
+	self.stack = self.stack[:n]
+	return last
+}
+
+func (self *StringStack) IsEmpty() bool {
+	return len(self.stack) == 0
+}
+
+func (self *StringStack) Clear() {
+	self.stack = []string{}
+}
-- 
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