private void ParseStart(RawTokenEnumerator enumerator, ref FlatTokenParserState state)
{
var peek = enumerator.Peek(4);
if (peek == "---\n")
{
state = FlatTokenParserState.InFrontMatter;
enumerator.Next(4);
return;
}
peek = enumerator.Peek(5);
if (peek == "---\r\n")
{
state = FlatTokenParserState.InFrontMatter;
enumerator.Next(4); // Next() will trim /r/n
return;
}
state = FlatTokenParserState.InPreamble;
}
private void ParseFrontMatter(RawTokenEnumerator enumerator, ref StringBuilder frontMatterName, ref FlatTokenParserState state)
{
var peek = enumerator.Peek(4);
if (peek == "---\n")
{
state = FlatTokenParserState.InPreamble;
enumerator.Next(4);
return;
}
peek = enumerator.Peek(5);
if (peek == "---\r\n")
{
state = FlatTokenParserState.InPreamble;
enumerator.Next(4); // Next() will trim \r\n
return;
}
var next = enumerator.Next();
switch (next)
{
case "#":
state = FlatTokenParserState.InFrontMatterComment;
break;
case "\n":
break;
default:
state = FlatTokenParserState.InFrontMatterOption;
frontMatterName.Append(next);
break;
}
}
private void ParseTokenName(RawTemplate template, ref RawToken token, RawTokenEnumerator enumerator, ref FlatTokenParserState state)
{
var next = enumerator.Next();
var peek = enumerator.Peek();
switch (next)
{
case "{":
throw new ParsingException($"Unexpected character '{{' in token '{token.Name}'", enumerator);
case "}":
template.Tokens.Add(token);
token = new RawToken();
state = FlatTokenParserState.InPreamble;
break;
case "$":
token.TerminateOnNewline = true;
switch (peek)
{
case "?":
case "*":
case "}":
case ":":
break;
default:
throw new ParsingException($"Invalid character '{peek}' in token '{token.Name}'", enumerator);
}
break;
case "?":
token.Optional = true;
switch (peek)
{
case "$":
case "*":
case "}":
case ":":
break;
default:
throw new ParsingException($"Invalid character '{peek}' in token '{token.Name}'", enumerator);
}
break;
case "*":
token.Repeating = true;
token.Optional = true;
switch (peek)
{
case "$":
case "?":
case "}":
case ":":
break;
default:
throw new ParsingException($"Invalid character '{peek}' in token '{token.Name}'", enumerator);
}
break;
case ":":
state = FlatTokenParserState.InDecorator;
break;
default:
if (token.Name == null)
{
token.Name = string.Empty;
}
if (ValidTokenNameCharacters.Contains(next))
{
token.Name += next;
}
else
{
throw new ParsingException($"Invalid character '{next}' in token '{token.Name}'", enumerator);
}
break;
}
}
