private TokenId ParseFromDigit()
{
TokenId integerLiteral;
char ch = this.ch;
this.NextChar();
if (((ch == '0') && (this.ch == 'x')) || (this.ch == 'X'))
{
integerLiteral = TokenId.BinaryLiteral;
do
{
this.NextChar();
}while (WebConvert.IsCharHexDigit(this.ch));
return(integerLiteral);
}
integerLiteral = TokenId.IntegerLiteral;
while (char.IsDigit(this.ch))
{
this.NextChar();
}
if (this.ch == '.')
{
integerLiteral = TokenId.DoubleLiteral;
this.NextChar();
this.ValidateDigit();
do
{
this.NextChar();
}while (char.IsDigit(this.ch));
}
if ((this.ch == 'E') || (this.ch == 'e'))
{
integerLiteral = TokenId.DoubleLiteral;
this.NextChar();
if ((this.ch == '+') || (this.ch == '-'))
{
this.NextChar();
}
this.ValidateDigit();
do
{
this.NextChar();
}while (char.IsDigit(this.ch));
}
if ((this.ch == 'M') || (this.ch == 'm'))
{
integerLiteral = TokenId.DecimalLiteral;
this.NextChar();
return(integerLiteral);
}
if ((this.ch == 'd') || (this.ch == 'D'))
{
integerLiteral = TokenId.DoubleLiteral;
this.NextChar();
return(integerLiteral);
}
if ((this.ch == 'L') || (this.ch == 'l'))
{
integerLiteral = TokenId.Int64Literal;
this.NextChar();
return(integerLiteral);
}
if ((this.ch == 'f') || (this.ch == 'F'))
{
integerLiteral = TokenId.SingleLiteral;
this.NextChar();
}
return(integerLiteral);
}
/// <summary>Parses a token that starts with a digit.</summary>
/// <returns>The kind of token recognized.</returns>
private TokenId ParseFromDigit()
{
Debug.Assert(Char.IsDigit(this.ch), "Char.IsDigit(this.ch)");
TokenId result;
char startChar = this.ch;
this.NextChar();
if (startChar == '0' && this.ch == 'x' || this.ch == 'X')
{
result = TokenId.BinaryLiteral;
do
{
this.NextChar();
}while (WebConvert.IsCharHexDigit(this.ch));
}
else
{
result = TokenId.IntegerLiteral;
while (Char.IsDigit(this.ch))
{
this.NextChar();
}
if (this.ch == '.')
{
result = TokenId.DoubleLiteral;
this.NextChar();
this.ValidateDigit();
do
{
this.NextChar();
}while (Char.IsDigit(this.ch));
}
if (this.ch == 'E' || this.ch == 'e')
{
result = TokenId.DoubleLiteral;
this.NextChar();
if (this.ch == '+' || this.ch == '-')
{
this.NextChar();
}
this.ValidateDigit();
do
{
this.NextChar();
}while (Char.IsDigit(this.ch));
}
if (this.ch == 'M' || this.ch == 'm')
{
result = TokenId.DecimalLiteral;
this.NextChar();
}
else
if (this.ch == 'd' || this.ch == 'D')
{
result = TokenId.DoubleLiteral;
this.NextChar();
}
else if (this.ch == 'L' || this.ch == 'l')
{
result = TokenId.Int64Literal;
this.NextChar();
}
else if (this.ch == 'f' || this.ch == 'F')
{
result = TokenId.SingleLiteral;
this.NextChar();
}
}
return(result);
}
