private void ScanDefault(LineProgress p)
{
while (!p.EndOfLine)
{
if (p.Char() == '$' && p.NextChar() == '@' && p.NextNextChar() == '"') // interpolated multiline string
{
p.Advance(3);
p.StartString(State.InterpolatedMultiLineString);
ScanMultiLineString(p, true);
}
else if (p.Char() == '$' && p.NextChar() == '"') // interpolated string
{
p.Advance(2);
p.StartString(State.InterpolatedString);
ScanString(p, true);
}
else
if (p.Char() == '@' && p.NextChar() == '"') // multi-line string
{
p.Advance(2);
p.StartString(State.MultiLineString);
ScanMultiLineString(p, false);
}
else if (p.Char() == '"') // single-line string
{
p.Advance();
p.StartString(State.String);
ScanString(p, false);
}
else if (p.Char() == '\'') // character
{
p.Advance();
ScanCharacter(p);
}
else if (p.Char() == '/' && p.NextChar() == '*') // multiline comment
{
p.Advance(2);
p.State = State.MultilineComment;
ScanMultiLineComment(p);
}
else if (p.Char() == '/' && p.NextChar() == '/') // single-line comment
{
p.AdvanceToEndOfLine();
}
else
{
p.Advance();
}
}
}
private State ScanLine(State state, ITextSnapshotLine line, List <TagSpan <StringTag> > naturalTextSpans = null)
{
LineProgress p = new LineProgress(line, state, naturalTextSpans);
while (!p.EndOfLine)
{
if (p.State == State.Default)
{
ScanDefault(p);
}
else if (p.State == State.MultiLineString || p.State == State.InterpolatedMultiLineString)
{
p.StartString(p.State);
ScanMultiLineString(p, isInterpolated: p.State == State.InterpolatedMultiLineString);
}
else if (p.State == State.MultilineComment)
{
ScanMultiLineComment(p);
}
else
{
Debug.Fail("Invalid state at beginning of line.");
}
}
// End Of Line state must be one of these.
Debug.Assert(p.State == State.Default ||
p.State == State.MultiLineString ||
p.State == State.InterpolatedMultiLineString ||
p.State == State.MultilineComment);
return(p.State);
}