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81 lines
2.4 KiB
81 lines
2.4 KiB
Namespace Parser
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''' <summary>
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''' Represents a token that is parsed out by the <see cref="Tokenizer"/>.
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''' </summary>
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Public NotInheritable Class Token
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Private _Text As String
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Private _ParsedObject As Object
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Private _Type As TokenType
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Private _Priority As TokenPriority
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''' <summary>
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''' The text that makes up the token.
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''' </summary>
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Public ReadOnly Property Text() As String
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Get
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Return _Text
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End Get
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End Property
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''' <summary>
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''' If the token can be parsed into a type like an integer, this property holds that value.
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''' </summary>
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Public ReadOnly Property ParsedObject() As Object
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Get
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Return _ParsedObject
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End Get
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End Property
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''' <summary>
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''' Token type
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''' </summary>
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Public ReadOnly Property Type() As TokenType
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Get
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Return _Type
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End Get
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End Property
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''' <summary>
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''' Token priority
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''' </summary>
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Public ReadOnly Property Priority() As TokenPriority
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Get
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Return _Priority
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End Get
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End Property
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''' <summary>
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''' Constructor for tokens that are not parsed.
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''' </summary>
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''' <param name="text"></param>
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''' <param name="type"></param>
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''' <param name="priority"></param>
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Public Sub New(text As String, type As TokenType, priority As TokenPriority)
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_Text = text
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_Type = type
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_Priority = priority
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_ParsedObject = text
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End Sub
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''' <summary>
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''' Constructor for tokens that are parsed.
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''' </summary>
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''' <param name="parsedObj"></param>
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''' <param name="type"></param>
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''' <param name="priority"></param>
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Public Sub New(parsedObj As Object, type As TokenType, priority As TokenPriority)
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_ParsedObject = parsedObj
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_Text = ParsedObject.ToString()
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_Type = type
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_Priority = priority
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End Sub
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''' <summary>
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''' The null token represents a state where the <see cref="Tokenizer"/> encountered an error
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''' or has not begun parsing yet.
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''' </summary>
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Public Shared NullToken As New Token("", TokenType.NotAToken, TokenPriority.None)
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End Class
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End Namespace |