// --------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// The MIT License (MIT)
//
// 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
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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//
// --------------------------------------------------------------------------

import Foundation


/// Simple structure to track namespaces
public struct NamespaceStack {
    private var stack: [String] = []

    /// Push a namespace segment onto the stack
    mutating func push(_ val: String) {
        self.stack.append(val)
    }

    /// Remove the last namespace segment from the stack
    mutating func pop() -> String? {
        return self.stack.popLast()
    }

    /// Get the fully qualified namespace
    func value() -> String {
        return self.stack.joined(separator: ".")
    }

    /// Reset the namespace stack to empty
    mutating func reset() {
        self.stack = []
    }
}
