/// <summary>
/// Gets the next symbol without touching the DDL cursor.
/// </summary>
internal Symbol PeekSymbol()
{
int idx = this.m_idx - 1;
int length = this.ddlLength - idx;
// Move to first non whitespace
char ch = char.MinValue;
while (length > 0)
{
ch = m_strDocument[idx++];
if (!DdlScanner.IsWhiteSpace(ch))
{
break;
}
length--;
}
if (DdlScanner.IsLetter(ch))
{
return(Symbol.Text);
}
else if (ch == '\\')
{
return(PeekKeyword(idx));
}
else
{
return(PeekPunctuator(idx - 1));
}
}
/// <summary>
/// Gets the next keyword without touching the DDL cursor.
/// </summary>
internal Symbol PeekKeyword(int index)
{
// Check special keywords
switch (m_strDocument[index])
{
case '{':
case '}':
case '\\':
case '-':
case '(':
return(Symbol.Character);
}
string token = "\\";
int idx = index;
int length = this.ddlLength - idx;
while (length > 0)
{
char ch = m_strDocument[idx++];
if (DdlScanner.IsLetter(ch))
{
token += ch;
length--;
}
else
{
break;
}
}
return(KeyWords.SymbolFromName(token));
}