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Token.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information.
using System;
using System.Dynamic;
using Microsoft.Scripting;
namespace IronPython.Compiler {
internal readonly struct TokenWithSpan {
public TokenWithSpan(Token token, IndexSpan span) {
Token = token;
Span = span;
}
public IndexSpan Span { get; }
public Token Token { get; }
}
/// <summary>
/// Summary description for Token.
/// </summary>
public abstract class Token {
private readonly TokenKind _kind;
protected Token(TokenKind kind) {
_kind = kind;
}
public TokenKind Kind {
get { return _kind; }
}
public virtual object Value {
get {
throw new NotSupportedException(IronPython.Resources.TokenHasNoValue);
}
}
public override string ToString() {
return base.ToString() + "(" + _kind + ")";
}
public abstract String Image {
get;
}
}
public class ErrorToken : Token {
private readonly String _message;
public ErrorToken(String message)
: base(TokenKind.Error) {
_message = message;
}
public String Message {
get { return _message; }
}
public override String Image {
get { return _message; }
}
public override object Value {
get { return _message; }
}
}
public class IncompleteStringErrorToken : ErrorToken {
private readonly string _value;
public IncompleteStringErrorToken(string message, string value)
: base(message) {
_value = value;
}
public override string Image {
get {
return _value;
}
}
public override object Value {
get {
return _value;
}
}
}
public class ConstantValueToken : Token {
private readonly object _value;
public ConstantValueToken(object value)
: base(TokenKind.Constant) {
_value = value;
}
public object Constant => _value;
public override object Value => _value;
public override String Image {
get {
return _value == null ? "None" : _value.ToString();
}
}
}
internal sealed class FormattedStringToken : Token {
private readonly string _value;
public FormattedStringToken(string value, bool isRaw)
: base(TokenKind.Constant) {
_value = value;
this.isRaw = isRaw;
}
public override string Image => _value;
public override object Value => _value;
public bool isRaw { get; }
}
public sealed class CommentToken : Token {
private readonly string _comment;
public CommentToken(string comment)
: base(TokenKind.Comment) {
_comment = comment;
}
public string Comment => _comment;
public override string Image => _comment;
public override object Value => _comment;
}
public class NameToken : Token {
private readonly string _name;
public NameToken(string name)
: base(TokenKind.Name) {
_name = name;
}
public string Name => _name;
public override object Value => _name;
public override String Image => _name;
}
public class OperatorToken : Token {
private readonly int _precedence;
private readonly string _image;
public OperatorToken(TokenKind kind, string image, int precedence)
: base(kind) {
_image = image;
_precedence = precedence;
}
public int Precedence {
get { return _precedence; }
}
public override object Value {
get { return _image; }
}
public override String Image {
get { return _image; }
}
}
public class SymbolToken : Token {
private readonly string _image;
public SymbolToken(TokenKind kind, String image)
: base(kind) {
_image = image;
}
public String Symbol {
get { return _image; }
}
public override object Value {
get { return _image; }
}
public override String Image {
get { return _image; }
}
}
}