private static bool IsToken(Token token, string value, TokenType type)
{
if (token == null)
return false;
if (token.TokenType != type)
return false;
return token.Value.Equals(value);
}
public void PushTwoToken2()
{
Lexer lexer = new Lexer(string.Empty);
Token token = new Token() { TokenType = TokenType.Name, Value = "name" };
Token token2 = new Token() { TokenType = TokenType.Name, Value = "name2" };
lexer.PushToken(token);
lexer.PushToken(token2);
Assert.AreEqual(token2, lexer.NextToken());
Assert.AreEqual(token, lexer.NextToken());
}
private static bool IsName(Token token, string value)
{
return IsToken(token, value, TokenType.Name);
}
private Token NextReal(string integerPart)
{
string real = integerPart + ".";
char ch;
try
{
ch = this.NextChar();
while (char.IsDigit(ch))
{
real += ch;
ch = this.NextChar();
}
this.PushChar(ch);
}
catch (EndOfInputException)
{
}
Token token = new Token();
token.Value = real;
token.TokenType = TokenType.Real;
return token;
}
private Token NextString()
{
StringBuilder sb = new StringBuilder();
char ch;
char lastChar = (char)0;
ch = this.NextChar();
while (ch != StringChar || lastChar == '\\')
{
if (lastChar == '\\')
{
switch (ch)
{
case 't':
sb.Length--;
sb.Append('\t');
break;
case 'a':
sb.Length--;
sb.Append('\a');
break;
case 'b':
sb.Length--;
sb.Append('\b');
break;
case 'e':
sb.Length--;
sb.Append((char)27);
break;
case 'f':
sb.Length--;
sb.Append('\f');
break;
case 'n':
sb.Length--;
sb.Append('\n');
break;
case 'r':
sb.Length--;
sb.Append('\r');
break;
case 'v':
sb.Length--;
sb.Append('\v');
break;
case '\\':
break;
default:
sb.Length--;
sb.Append(ch);
break;
}
lastChar = (char)0;
}
else
{
sb.Append(ch);
lastChar = ch;
}
ch = this.NextChar();
}
Token token = new Token();
token.Value = sb.ToString();
token.TokenType = TokenType.String;
return token;
}
private Token NextName(char ch)
{
string name = ch.ToString();
try
{
ch = this.NextChar();
while (char.IsLetterOrDigit(ch) || ch == '_')
{
name += ch;
ch = this.NextChar();
}
this.PushChar(ch);
}
catch (EndOfInputException)
{
}
Token token = new Token();
token.Value = name;
token.TokenType = TokenType.Name;
if (name == "true" || name == "false")
token.TokenType = TokenType.Boolean;
if (name == "null" || name == "undefined")
token.TokenType = TokenType.Object;
return token;
}
private Token NextQuotedString()
{
StringBuilder sb = new StringBuilder();
char ch;
char lastChar = (char)0;
ch = this.NextChar();
while (ch != QuotedStringChar)
{
sb.Append(ch);
lastChar = ch;
ch = this.NextChar();
}
Token token = new Token();
token.Value = sb.ToString();
token.TokenType = TokenType.String;
return token;
}
public void PushToken(Token token)
{
if (this.tokens == null)
this.tokens = new Stack<Token>();
this.tokens.Push(token);
}
private Token NextInteger(char ch)
{
string integer = ch.ToString();
try
{
ch = this.NextChar();
while (char.IsDigit(ch))
{
integer += ch;
ch = this.NextChar();
}
if (ch == '.')
{
return this.NextReal(integer);
}
this.PushChar(ch);
}
catch (EndOfInputException)
{
}
Token token = new Token();
token.Value = integer;
token.TokenType = TokenType.Integer;
return token;
}
public void PushToken()
{
Lexer lexer = new Lexer("");
Token token = new Token() { TokenType = TokenType.Name, Value = "name" };
lexer.PushToken(token);
Assert.AreEqual(token, lexer.NextToken());
}
public UnexpectedTokenException(Token token)
: base(string.Format(CultureInfo.CurrentCulture, "Unexpected '{0}'", token.Value))
{
}
private Token NextReal(string integerPart)
{
string real = integerPart + ".";
char? nch;
nch = this.NextChar();
while (nch.HasValue && char.IsDigit(nch.Value))
{
real += nch;
nch = this.NextChar();
}
if (nch.HasValue)
this.PushChar(nch.Value);
Token token;
if (real.EndsWith("."))
{
this.PushChar('.');
token = new Token();
token.Value = integerPart;
token.TokenType = TokenType.Integer;
return token;
}
token = new Token();
token.Value = real;
token.TokenType = TokenType.Real;
return token;
}
private Token NextName(char? nch)
{
string name = nch.ToString();
nch = this.NextChar();
while (nch.HasValue && (char.IsLetterOrDigit(nch.Value) || nch.Value == '_'))
{
name += nch.Value;
nch = this.NextChar();
}
if (nch.HasValue)
this.PushChar(nch.Value);
Token token = new Token();
token.Value = name;
token.TokenType = TokenType.Name;
return token;
}
private Token NextInteger(char? nch)
{
string integer = nch.ToString();
nch = this.NextChar();
while (nch.HasValue && char.IsDigit(nch.Value))
{
integer += nch;
nch = this.NextChar();
}
if (nch == '.')
{
return this.NextReal(integer);
}
if (nch.HasValue)
this.PushChar(nch.Value);
Token token = new Token();
token.Value = integer;
token.TokenType = TokenType.Integer;
return token;
}
