public override void EnterRuleExistsMatch(RuleExistsMatchContext context)
{
var patternTypeName = context.type().GetText();
var patternType = _parserContext.FindType(patternTypeName);
if (patternType == null)
{
throw new InternalParseException($"Unknown type. Type={patternTypeName}", context);
}
var existsBuilder = _groupBuilder.Exists();
var patternBuilder = existsBuilder.Pattern(patternType);
if (context.expression_list() != null)
{
foreach (var expressionContext in context.expression_list().expression())
{
using (_parserContext.PushScope())
{
var expressionParser = new ExpressionParser(_parserContext, patternType);
var expression = (LambdaExpression)expressionParser.Visit(expressionContext);
patternBuilder.DslConditions(_parserContext.Scope.Declarations, expression);
}
}
}
}
public ILeftHandSideExpression Exists <TFact>(params Expression <Func <TFact, bool> >[] conditions)
{
var existsBuilder = _groupBuilder.Exists();
var patternBuilder = existsBuilder.Pattern(typeof(TFact));
patternBuilder.DslConditions(_groupBuilder.Declarations, conditions);
return(this);
}