From 4faed184c90122e05e70ea3755ead4f5b7009416 Mon Sep 17 00:00:00 2001
From: Thomas Meckel <tmeckel@users.noreply.github.com>
Date: Sun, 23 Jun 2019 15:32:29 +0200
Subject: [PATCH] Added github.com/golang-collections/collections to vendor
 directory

---
 .../golang-collections/collections/LICENSE    | 20 +++++++++
 .../collections/stack/stack.go                | 44 +++++++++++++++++++
 .../collections/stack/stack_test.go           | 42 ++++++++++++++++++
 3 files changed, 106 insertions(+)
 create mode 100644 vendor/github.com/golang-collections/collections/LICENSE
 create mode 100644 vendor/github.com/golang-collections/collections/stack/stack.go
 create mode 100644 vendor/github.com/golang-collections/collections/stack/stack_test.go

diff --git a/vendor/github.com/golang-collections/collections/LICENSE b/vendor/github.com/golang-collections/collections/LICENSE
new file mode 100644
index 000000000..75a26aeb3
--- /dev/null
+++ b/vendor/github.com/golang-collections/collections/LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2012 Caleb Doxsey
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/vendor/github.com/golang-collections/collections/stack/stack.go b/vendor/github.com/golang-collections/collections/stack/stack.go
new file mode 100644
index 000000000..04063dfab
--- /dev/null
+++ b/vendor/github.com/golang-collections/collections/stack/stack.go
@@ -0,0 +1,44 @@
+package stack
+
+type (
+	Stack struct {
+		top *node
+		length int
+	}
+	node struct {
+		value interface{}
+		prev *node
+	}	
+)
+// Create a new stack
+func New() *Stack {
+	return &Stack{nil,0}
+}
+// Return the number of items in the stack
+func (this *Stack) Len() int {
+	return this.length
+}
+// View the top item on the stack
+func (this *Stack) Peek() interface{} {
+	if this.length == 0 {
+		return nil
+	}
+	return this.top.value
+}
+// Pop the top item of the stack and return it
+func (this *Stack) Pop() interface{} {
+	if this.length == 0 {
+		return nil
+	}
+	
+	n := this.top
+	this.top = n.prev
+	this.length--
+	return n.value
+}
+// Push a value onto the top of the stack
+func (this *Stack) Push(value interface{}) {
+	n := &node{value,this.top}
+	this.top = n
+	this.length++
+}
\ No newline at end of file
diff --git a/vendor/github.com/golang-collections/collections/stack/stack_test.go b/vendor/github.com/golang-collections/collections/stack/stack_test.go
new file mode 100644
index 000000000..52c909475
--- /dev/null
+++ b/vendor/github.com/golang-collections/collections/stack/stack_test.go
@@ -0,0 +1,42 @@
+package stack
+
+import (
+	"testing"
+)
+
+func Test(t *testing.T) {
+	s := New()
+	
+	if s.Len() != 0 {
+		t.Errorf("Length of an empty stack should be 0")	
+	}
+	
+	s.Push(1)
+	
+	if s.Len() != 1 {
+		t.Errorf("Length should be 0")
+	}
+	
+	if s.Peek().(int) != 1 {
+		t.Errorf("Top item on the stack should be 1")
+	}
+	
+	if s.Pop().(int) != 1 {
+		t.Errorf("Top item should have been 1")
+	}
+	
+	if s.Len() != 0 {
+		t.Errorf("Stack should be empty")
+	}
+	
+	s.Push(1)
+	s.Push(2)
+	
+	if s.Len() != 2 {
+		t.Errorf("Length should be 2")
+	}
+	
+	if s.Peek().(int) != 2 {
+		t.Errorf("Top of the stack should be 2")
+	}	
+}
\ No newline at end of file