public static bool ScanMultiLine(Lexer lexer, ref Token token)
{
#if DEBUG
if (lexer == null)
{
throw new ArgumentNullException(nameof(lexer));
}
Scanner.EnsureCurrent(lexer, '/');
Scanner.EnsureNext(lexer, '*');
#endif
Source src = lexer.Src;
StringBuilder builder = lexer.Builder;
builder.Clear();
bool inComment = true;
char previous = ' ';
while (!src.ReachedEnd())
{
char current = src.Current;
if ((builder.Length > "/*".Length) &&
(previous == '*') && (current == '/'))
{
inComment = false;
builder.Append(current);
break;
}
builder.Append(current);
src.Advance();
previous = current;
}
token.Type = TokenType.MultiComment;
token.Value = builder.ToString();
return(!inComment);
}
public static bool ScanSingleLine(Lexer lexer, ref Token token)
{
#if DEBUG
if (lexer == null)
{
throw new ArgumentNullException(nameof(lexer));
}
Scanner.EnsureCurrent(lexer, '/');
Scanner.EnsureNext(lexer, '/');
#endif
Source src = lexer.Src;
StringBuilder builder = lexer.Builder;
builder.Clear();
while (!src.ReachedEnd())
{
char current = src.Current;
if (builder.Length >= "//".Length)
{
char next = src.Peek();
if ((next == '\r') || (next == '\n'))
{
builder.Append(current);
break;
}
}
builder.Append(current);
src.Advance();
}
token.Type = TokenType.SingleComment;
token.Value = builder.ToString();
return(true);
}