public static LexerCursor ParseQuery(string input)
{
var cursor = new LexerCursor {
Input = input,
MaxStack = 256
};
var lastPosition = -1;
while (cursor.Peek("$", @".", false))
{
// LOOP EXIT
if (cursor.EOF)
{
break;
}
if (ExtractContent(cursor))
{
continue;
}
// ignore closing parentheses if not in the context of group
cursor.Ignore(@"\)");
var closuresRequired = 0;
while (!cursor.EOF)
{
lastPosition = GobbleUnsupported(lastPosition, cursor);
if (!cursor.TryPush(KeywordParenthesesOpen, @"\(", ref closuresRequired))
{
break;
}
if (ExtractContent(cursor))
{
continue;
}
var exitPop = cursor.TryPop(KeywordParenthesesClose, @"\)", ref closuresRequired);
if (exitPop)
{
break;
}
}
while (closuresRequired > 0)
{
closuresRequired--;
cursor.FakeMatch(KeywordParenthesesClose, @")", pop: true);
}
}
return(cursor);
}
public static LexerCursor ParseEquation(string input)
{
var cursor = new LexerCursor {
Input = input
};
while (cursor.Peek("$", @".", false))
{
// LOOP EXIT
if (cursor.EOF)
{
break;
}
cursor.Ignore(@"\s+");
ExtractNumber(cursor);
while (ExtractVariable(cursor))
{
cursor.Ignore(@"\s+");
cursor.PassThrough("MEMBER", @"\.");
// LOOP EXIT
if (cursor.EOF)
{
break;
}
}
cursor.Ignore(@"\s+");
ExtractQuoteString(cursor);
cursor.Ignore(@"\s+");
var parenthDepthCounter = 0;
while (!cursor.EOF)
{
cursor.TryPush("(", ref parenthDepthCounter);
cursor.Ignore(@"\s+");
if (cursor.TryMatch(","))
{
continue;
}
if (cursor.TryMatch("++"))
{
continue;
}
if (cursor.TryMatch("--"))
{
continue;
}
if (ExtractVariable(cursor))
{
continue;
}
if (ExtractNumber(cursor))
{
continue;
}
if (cursor.TryMatch("*"))
{
continue;
}
if (cursor.TryMatch("\\"))
{
continue;
}
if (cursor.TryMatch("%"))
{
continue;
}
if (cursor.TryMatch("+"))
{
continue;
}
if (cursor.TryMatch("-"))
{
continue;
}
if (cursor.TryMatch("==="))
{
continue;
}
if (cursor.TryMatch("<="))
{
continue;
}
if (cursor.TryMatch(">="))
{
continue;
}
if (cursor.TryMatch("<"))
{
continue;
}
if (cursor.TryMatch(">"))
{
continue;
}
if (cursor.TryMatch("=="))
{
continue;
}
if (cursor.TryPop(")", ref parenthDepthCounter))
{
break;
}
cursor.PassThrough(".");
}
}
return(cursor);
}