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 ScanMultiLineString(LineProgress p)
{
p.StartNaturalText();
while (!p.EndOfLine)
{
if (p.Char() == '"' && p.NextChar() == '"') // "" is allowed within multiline string.
{
p.Advance(2);
}
else if (p.Char() == '"') // end of multi-line string
{
p.EndNaturalText();
p.Advance();
p.State = State.Default;
return;
}
else
{
p.Advance();
}
}
// End of line. Emit as human readable, but remain in MultiLineString state.
p.EndNaturalText();
Debug.Assert(p.State == State.MultiLineString);
}
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);
}