public Match GetMatch(string s, int pos, Token prevToken)
{
if (s[pos] == '(')
return new Match(1, new Token(Bracket.Opening));
if (s[pos] == ')')
return new Match(1, new Token(Bracket.Closing));
return null;
}
public void TestGetValue()
{
var token = new Token(1);
var tree = new ExpressionTree(token, null);
var result = tree.GetResult();
Assert.AreEqual(1, result);
}
public Match GetMatch(string s, int pos, Token prevToken)
{
if (prevToken == null || prevToken.Type != TokenType.Number && prevToken.Type != TokenType.ClosingBracket)
{
return null;
}
if (s.Substring(pos).StartsWith(binaryOperator.Sign))
{
return new Match(binaryOperator.Sign.Length, new Token(binaryOperator));
}
return null;
}
public Match GetMatch(string s, int pos, Token prevToken)
{
if (prevToken != null && prevToken.Type != TokenType.OpeningBracket)
{
return null;
}
if (s.Substring(pos).StartsWith(unaryOperator.Sign))
{
return new Match(unaryOperator.Sign.Length, new Token(unaryOperator));
}
return null;
}
public void TestGetUnaryOperationResult()
{
var child = MockRepository.GenerateMock<IExpressionTree>();
child.Expect(t => t.GetResult())
.Return(1);
var op = MockRepository.GenerateMock<IUnaryOperator>();
op.Expect(o => o.Apply(Arg<double>.Is.Equal(1)))
.Return(-1);
var token = new Token(op);
var tree = new ExpressionTree(token, new List<IExpressionTree> { child });
var result = tree.GetResult();
Assert.AreEqual(-1, result);
}
public Match GetMatch(string s, int pos, Token prevToken)
{
var numberLength = 0;
double? number = null;
while (pos + numberLength < s.Length)
{
var ss = s.Substring(pos, numberLength+1);
double parsedNumber;
if (!Double.TryParse(ss, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out parsedNumber))
{
break;
}
number = parsedNumber;
numberLength++;
}
if (!number.HasValue)
return null;
return new Match(numberLength, new Token(number.Value));
}
public ExpressionTree(Token token, IList<IExpressionTree> children)
{
this.Token = token;
this.children = children;
}
public Match(int length, Token token)
{
Length = length;
Token = token;
}
