private ConditionExpression ParseLiteralExpression()
{
if (_tokenizer.IsToken(ConditionTokenType.LeftParen))
{
_tokenizer.GetNextToken();
ConditionExpression e = ParseExpression();
_tokenizer.Expect(ConditionTokenType.RightParen);
return(e);
}
if (_tokenizer.IsToken(ConditionTokenType.Minus))
{
_tokenizer.GetNextToken();
if (!_tokenizer.IsNumber())
{
throw new ConditionParseException($"Number expected, got {_tokenizer.TokenType}");
}
return(ParseNumber(true));
}
if (_tokenizer.IsNumber())
{
return(ParseNumber(false));
}
if (_tokenizer.TokenType == ConditionTokenType.String)
{
var simpleLayout = new SimpleLayout(_tokenizer.StringTokenValue, _configurationItemFactory);
_tokenizer.GetNextToken();
if (simpleLayout.IsFixedText)
{
return(new ConditionLiteralExpression(simpleLayout.FixedText, simpleLayout.ToString()));
}
else
{
return(new ConditionLayoutExpression(simpleLayout));
}
}
if (_tokenizer.TokenType == ConditionTokenType.Keyword)
{
string keyword = _tokenizer.EatKeyword();
if (TryPlainKeywordToExpression(keyword, out var expression))
{
return(expression);
}
if (_tokenizer.TokenType == ConditionTokenType.LeftParen)
{
_tokenizer.GetNextToken();
ConditionMethodExpression predicateExpression = ParsePredicate(keyword);
return(predicateExpression);
}
}
throw new ConditionParseException("Unexpected token: " + _tokenizer.TokenValue);
}
public void SimpleLayoutToStringTest()
{
var l = new SimpleLayout("xx${level}yy");
Assert.Equal("'xx${level}yy'", l.ToString());
var l2 = new SimpleLayout(new LayoutRenderer[0], "someFakeText", ConfigurationItemFactory.Default);
Assert.Equal("'someFakeText'", l2.ToString());
}
/// <summary>
/// Returns a string representation of this expression.
/// </summary>
/// <returns>String literal in single quotes.</returns>
public override string ToString()
{
return(_simpleLayout.ToString());
}
/// <summary>
/// Returns a string representation of this expression.
/// </summary>
/// <returns>String literal in single quotes.</returns>
public override string ToString()
{
return($"'{_simpleLayout.ToString()}'");
}
