private static IEnumerable<Token> ReadTokensFromString(string input)
{
using(var reader = new LocatedTextReaderWrapper(input)) {
var tokenReader = new TokenReader(reader);
return tokenReader.ReadTokens().ToList();
}
}
public void BadStrings()
{
Func<string, TestDelegate> stringTester = (input) => () => {
using(var reader = new LocatedTextReaderWrapper(input)) {
var tokenReader = new TokenReader(reader);
tokenReader.ReadToken();
}
};
Assert.Throws<MissingDataException>(stringTester("\""));
Assert.Throws<MissingDataException>(stringTester("\"\\"));
Assert.Throws<BadDataException>(stringTester("\"\\?\""));
}
public void Strings()
{
string input = "\"\\\"hello \\\\\\t\\r\\nworld\\\"\"";
using(var reader = new LocatedTextReaderWrapper(input)) {
var tokenReader = new TokenReader(reader);
var token = tokenReader.ReadToken();
Assert.AreEqual(-1, reader.Peek()); // EOF
Assert.AreEqual(token.TokenType, TokenType.String);
Assert.AreEqual(token.Value, "\"hello \\\t\r\nworld\"");
}
}
private static TokenNode ExpressionToTokenNode(string expression)
{
using(var reader = new LocatedTextReaderWrapper(expression, new Location())) {
var tokenReader = new TokenReader(reader);
return ExpressionRewriter.Rewrite(tokenReader);
}
}
/// <summary>
/// Parses a line containing a directive reference.
/// </summary>
/// <param name="nameExpression">The regular expression to match the name of the directive.</param>
/// <param name="line">The line containing the directive.</param>
/// <param name="location">The location of the directive.</param>
/// <param name="parameterReader">The reader of the parsed directive parameters.</param>
/// <param name="directiveName">The parsed name of the directive.</param>
/// <returns>True if the directive was successfully parsed; otherwise, false.</returns>
private static bool ParseDirectiveLine(string nameExpression, string line, Location location, out ITokenReader parameterReader, out string directiveName)
{
parameterReader = null;
directiveName = null;
Regex re = new Regex("^#(?<name>" + nameExpression + ")(\\s+(?<params>.*))?$", RegexOptions.ExplicitCapture);
var match = re.Match(line);
if(!match.Success) {
return false;
}
directiveName = match.Groups["name"].Value;
var parametersText = match.Groups["params"].Value;
var parametersLocation = location.Clone();
parametersLocation.AdvanceString(line.Substring(0, match.Groups["params"].Index));
var parametersReader = new LocatedTextReaderWrapper(parametersText, parametersLocation);
parameterReader = new TokenReader(parametersReader);
return true;
}
