private void Expacc()
{
_currentNode.AddChild(new ParseNode(ParseEnum.ExpressionAccent));
_currentNode = _currentNode.GetChildren()[_currentNode.GetChildren().Count - 1];
if (_current is AddSub)
{
_currentNode.AddChild(new ParseNode(ParseEnum.Operator, _current.GetValue()));
if (!_lex.EndOfInput)
{
_current = _lex.GetNextToken();
}
Term();
Expacc();
}
else if (_current is Equals)
{
_currentNode.AddChild(new ParseNode(ParseEnum.Equals));
if (!_lex.EndOfInput)
{
_current = _lex.GetNextToken();
}
Expressie();
}
else
{
_currentNode.AddChild(new ParseNode(ParseEnum.Empty));
}
_currentNode = _currentNode.GetParent();
}
public void TestSimpleParenthesisExpression()
{
LexicalScanner scanner = new LexicalScanner("(1*2)");
AbstractToken token = scanner.GetNextToken();
Assert.IsInstanceOf(typeof(OpenParenthesis), token);
Assert.IsTrue(token.GetValue().Equals("("));
token = scanner.GetNextToken();
Assert.IsInstanceOf(typeof(Integer), token);
Assert.IsTrue(token.GetValue().Equals("1"));
token = scanner.GetNextToken();
Assert.IsInstanceOf(typeof(Operator), token);
Assert.IsTrue(token.GetValue().Equals("*"));
token = scanner.GetNextToken();
Assert.IsInstanceOf(typeof(Integer), token);
Assert.IsTrue(token.GetValue().Equals("2"));
token = scanner.GetNextToken();
Assert.IsInstanceOf(typeof(CloseParenthesis), token);
Assert.IsTrue(token.GetValue().Equals(")"));
}
public void TestFloat()
{
LexicalScanner scanner = new LexicalScanner("1.0");
AbstractToken token = scanner.GetNextToken();
Assert.IsInstanceOf(typeof(Float), token);
Assert.IsTrue(token.GetValue().Equals("1.0"));
}
public void TestSimpleAddSubExpression()
{
LexicalScanner scanner = new LexicalScanner("1+2");
AbstractToken token = scanner.GetNextToken();
Assert.IsInstanceOf(typeof(Integer), token);
Assert.IsTrue(token.GetValue().Equals("1"));
token = scanner.GetNextToken();
Assert.IsInstanceOf(typeof(AddSub), token);
Assert.IsTrue(token.GetValue().Equals("+"));
token = scanner.GetNextToken();
Assert.IsInstanceOf(typeof(Integer), token);
Assert.IsTrue(token.GetValue().Equals("2"));
}
private String Text(Tokenizer.Tokenizer tokenizer)
{
AbstractToken token = tokenizer.NextToken();
if (token.GetType() == typeof(Comma) || token.GetType() == typeof(Text))
{
return(token.GetValue());
}
throw new ParseException("Expected type Text but found: " + token.GetType() + " after " + tokenizer.GetPreviousCharacters(25));
}
