private void ScanCharacter(LineProgress p)
{
if (!p.EndOfLine && p.Char() == '\\') // escaped character. Eat it.
{
p.Advance(2);
}
else if (!p.EndOfLine && p.Char() != '\'') // non-escaped character. Eat it.
{
p.Advance(1);
}
if (!p.EndOfLine && p.Char() == '\'') // closing ' for character, as expected.
{
p.Advance(1);
p.State = State.Default;
return;
}
// Didn't find closing ' for character. Oh well.
p.State = State.Default;
}
private void ScanDefault(LineProgress p)
{
while (!p.EndOfLine)
{
if (p.Char() == '/' && p.NextChar() == '/' && p.NextNextChar() == '/') // doc comment.
{
p.Advance(3);
p.State = State.DocComment;
ScanDocComment(p);
}
else if (p.Char() == '/' && p.NextChar() == '/') // single line comment
{
p.Advance(2);
p.StartNaturalText();
p.AdvanceToEndOfLine();
p.EndNaturalText();
p.State = State.Default;
return;
}
else if (p.Char() == '/' && p.NextChar() == '*') // multi-line comment
{
p.Advance(2);
p.State = State.MultiLineComment;
ScanMultiLineComment(p);
}
else if (p.Char() == '@' && p.NextChar() == '"') // multi-line string
{
p.Advance(2);
p.State = State.MultiLineString;
ScanMultiLineString(p);
}
else if (p.Char() == '"') // single-line string
{
p.Advance(1);
p.State = State.String;
ScanString(p);
}
else if (p.Char() == '\'') // character literal
{
p.Advance(1);
p.State = State.Character;
ScanCharacter(p);
}
else
{
p.Advance();
}
}
}
private void ScanDocCommentXmlString(LineProgress p)
{
while (!p.EndOfLine)
{
if (p.Char() == '"')
{
p.Advance(1);
p.State = State.DocCommentXml;
return; // Done with string in doc comment xml.
}
else
{
p.Advance();
}
}
// End of line. Never found the '"' to close the string, but whatever. We revert to default state.
p.State = State.Default;
}
private void ScanMultiLineComment(LineProgress p)
{
p.StartNaturalText();
while (!p.EndOfLine)
{
if (p.Char() == '*' && p.NextChar() == '/') // close comment
{
p.EndNaturalText();
p.Advance(2);
p.State = State.Default;
return; // done with multi-line comment.
}
else
{
p.Advance();
}
}
// End of line. Emit as human readable, but remain in MultiLineComment state.
p.EndNaturalText();
Debug.Assert(p.State == State.MultiLineComment);
}