/// <summary>
/// Tokenizes an identifier.
/// </summary>
/// <returns>The state result</returns>
private StateResult Identifier()
{
// We assume the first character has been considered.
TakeCurrent();
// Take all characters that are considered identifiers.
TakeUntil(c => !HandlebarsHelpers.IsIdentifierPart(c));
HandlebarsSymbol symbol = null;
if (HaveContent)
{
var keyword = HandlebarsKeywordDetector.SymbolTypeForIdentifier(Buffer.ToString());
var type = HandlebarsSymbolType.Identifier;
if (keyword != null)
{
type = HandlebarsSymbolType.Keyword;
}
symbol = new HandlebarsSymbol(CurrentStart, Buffer.ToString(), type)
{
Keyword = keyword
};
}
// Start a new symbol.
StartSymbol();
return(Stay(symbol));
}
/// <summary>
/// Continues the content of the tag.
/// </summary>
/// <param name="raw">True if we are expected a raw tag.</param>
/// <returns>The state result.</returns>
private StateResult ContinueTagContent(bool raw)
{
if (CurrentCharacter == '@')
{
TakeCurrent();
return(Stay(EndSymbol(HandlebarsSymbolType.At)));
}
if (HandlebarsHelpers.IsIdentifierStart(CurrentCharacter))
{
return(Identifier());
}
if (Char.IsDigit(CurrentCharacter))
{
return(NumericLiteral());
}
switch (CurrentCharacter)
{
case '.':
{
TakeCurrent();
if (CurrentCharacter == '/')
{
// We've matched a link to the current context.
TakeCurrent();
return(Stay(EndSymbol(HandlebarsSymbolType.CurrentContext)));
}
if (CurrentCharacter == '.' && Peek() == '/')
{
// We've matched a link to the parent context.
TakeCurrent();
TakeCurrent();
return(Stay(EndSymbol(HandlebarsSymbolType.ParentContext)));
}
// We've matched a dot, which could be part of an expression.
return(Stay(EndSymbol(HandlebarsSymbolType.Dot)));
}
case '/':
{
TakeCurrent();
// We've matched a forward-slash, which could be part of an expression.
return(Stay(EndSymbol(HandlebarsSymbolType.Slash)));
}
case ' ':
{
// Take all the available whitespace.
TakeUntil(c => !ParserHelpers.IsWhiteSpace(c));
return(Stay(EndSymbol(HandlebarsSymbolType.WhiteSpace)));
}
case '~':
{
TakeCurrent();
// We've reached a '~' character, so jump to the end of the tag.
return(Transition(EndSymbol(HandlebarsSymbolType.Tilde), () => EndTag(raw)));
}
case '"':
case '\'':
{
var quote = CurrentCharacter;
TakeCurrent();
// We've reached a quoted literal.
return(QuotedLiteral(quote));
}
case '=':
{
// We're reached a map assignment.
TakeCurrent();
return(Stay(EndSymbol(HandlebarsSymbolType.Assign)));
}
case '}':
{
// We've reached a closing tag, so transition away.
return(Transition(() => EndTag(raw)));
}
default:
{
CurrentErrors.Add(new Error("Unexpected character: " + CurrentCharacter, CurrentLocation));
return(Transition(Stop));
}
}
}
