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Suppose I have a module with the following:
public class classTickerCustomNYSE : classTickerCommon { ... }
public class classTickerCustomNASDAQ : classTickerCommon { ... }
... and given that I also have the following in the same module:
public enum structureExchanges = [
r"NYSE"d : structureExchange(r"NYSE"d, r"New York Stock Exchange"d, r"USD"d, r"usa"d, r"New York"d, r"EST"d),
r"NASDAQ"d : structureExchange(r"NASDAQ"d, r"National Association of Securities Dealers Automated Quotations"d, r"USD"d, r"usa"d, r"New York"d, r"EST"d),
r"LSE"d : structureExchange(r"LSE"d, r"London Stock Exchange"d, r"GBP"d, r"gbr"d, r"London"d, r"UTC"d),
r"XETRA"d : structureExchange(r"XETRA"d, r"Deutsche Börse"d, r"EUR"d, r"deu"d, r"Frankfurt am Main"d, r"CET"d),
r"B3"d : structureExchange(r"B3"d, r"B3 formerly Bolsa de Valores de São Paulo (aka BOVESPA)"d, r"BRL"d, r"bra"d, r"São Paulo"d, r"BRT"d),
r"BCBA"d : structureExchange(r"BCBA"d, r"Bolsa de Comercio de Buenos Aires"d, r"ARS"d, r"arg"d, r"Buenos Aires"d, r"ART"d)
];
public struct structureExchange { /// solely‐intended to help build code at compilation‐time; for client‐code classExchanges should be used instead
public dstring ID;
public dstring name;
public dstring currencyID;
public typeLocation location;
@safe this(
const dstring lstrExchangeID,
const dstring lstrExchangeName,
const dstring lstrCurrencyID,
const dstring lstrCountryID,
const dstring lstrCity,
const dstring lstrTZ
) {
ID = lstrExchangeID;
name = lstrExchangeName;
currencyID = lstrCurrencyID;
location = typeLocation(
lstrCountryID,
lstrCity,
lstrTZ)
;
}
}
... at compilation-time I can do things like:
static foreach (structureExchange sudtExchange; structureExchanges) { /// assume the following code as a template to build new classTickerCustom{ExchangeID} classes
mixin(format!
` /// code chunk
final public class classTickerCustom%1$s : classTickerCommon {
...
}
`(sudtExchange.ID) /// code chunk
); /// mixin ending
}
... now, question is: how can I check, within the static foreach code, whether a class is already-implemented or not; eg:
static foreach (structureExchange sudtExchange; structureExchanges) {
if (! ? == r"classTickerCustom"d ~ sudtExchange.ID) {
/// class is not implemented yet: do whatever here ...
}
}
... my first thought was traits (https://dlang.org/spec/traits.html) but I don't see anything useful there; there is getMember() but the example is for already-declared objects within the module, and not the module itself.
