/// <summary> scans a quoted string that is opened by c1 and closed by c2. </summary>
/// <param name="c1">the opening character.
/// </param>
/// <param name="c2">the closing character.
/// </param>
/// <returns> the scanner.
/// </returns>
public static Scanner IsQuotedBy(char c1, char c2)
{
return(IsPattern("open quote and quoted",
Patterns.IsChar(c1).Seq(Patterns.Many(CharPredicates.NotChar(c2))), "" + c1)
.Seq(IsChar(c2)).Rename("quoted"));
}
/// <summary> Matches a line comment that starts with a string
/// and end with EOF or Line Feed character.
/// </summary>
/// <param name="open">the line comment starting string.
/// </param>
/// <returns> the Pattern object.
/// </returns>
public static Pattern IsLineComment(string open)
{
return(IsString(open).Seq(Many(CharPredicates.NotChar('\n'))));
}
/// <summary> succeed and consume the current character if it is equal to ch.</summary>
/// <param name="ch">the expected character.
/// </param>
/// <param name="expected_name">the error message.
/// </param>
/// <returns> the scanner.
/// </returns>
public static Scanner NotChar(char ch, string expected_name)
{
return(IsChar(CharPredicates.NotChar(ch), expected_name).Rename("not char"));
}