public Func <DateTime, DateTime> ParseRuleObservedString(string source, string dayName, string country, Calendar calendar)
{
ICharStream stream = CharStreams.fromstring(source);
var lexer = new CalendariumLexer(stream, Output, OutputError);
var token = new CommonTokenStream(lexer);
var _parser = new CalendariumParser(token)
{
BuildParseTree = true,
//Trace = ScriptParser.Trace, // Ca plante sur un null, pourquoi ?
};
CalendariumParser.ScriptContext _context = _parser.script();
var visitor = new ParserBaseVisitor(calendar);
var call = (Expression <Func <DateTime, DateTime> >)visitor.Visit(_context);
var txt = "'" + source + "' -> '" + call.Body.ToString() + "'";
Trace.WriteLine($"{country.ToString()}:{dayName} : {txt}");
if (System.Diagnostics.Debugger.IsAttached) // Build an interceptor for log
{
var parameter = Expression.Parameter(typeof(DateTime), "date");
var ee = Expression.Call(null, _delegateLogDebugObserved.Method, call, parameter, Expression.Constant(country), Expression.Constant(dayName), Expression.Constant(txt));
call = Expression.Lambda <Func <DateTime, DateTime> >(ee, parameter);
}
Func <DateTime, DateTime> f = call.Compile();
return(f);
}
/// <summary>
/// expression
/// | INTEROGATION expression_bool COLON expression
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public override Expression VisitScript([NotNull] CalendariumParser.ScriptContext context)
{
Expression result;
if (context.INTEROGATION() != null)
{
_stack.Push(_date);
var call = (MethodCallExpression)base.VisitScript(context);
var e = VisitExpression_bool(context.expression_bool());
var condition = Expression.Condition(e, call, _date);
result = Expression.Lambda <Func <DateTime, DateTime> >(condition, _date);
}
else
{
var call = (MethodCallExpression)base.VisitScript(context);
result = Expression.Lambda <Func <int, DateTime[]> >(call, _year);
}
return(result);
}
