public override Func <IReadOnlyList <IGrammarTerm>, decimal> VisitFxRateFunc(MyGrammarParser.FxRateFuncContext context)
{
var termId = context.GetText();
var currencyPair = context.currencyPair().GetText();
var term = new FxRateTerm(termId, CurrencyPairIdentifier.ParseExact(currencyPair));
_terms.Add(term);
return(x => x.First(t => t.TermId == term.TermId).Value);
}
public void Visit(FxRateTerm fxRateTerm)
{
var priceStream = _fxRateRepository
.GetPricesFor(fxRateTerm.Identifier)
.Select(x =>
{
fxRateTerm.SetValue(x.Rate);
return(fxRateTerm);
});
_terms.Add(priceStream);
}