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POc++ message lookup table (iostream)
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  1. POc++ message lookup table (iostream)
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    copied!<p>Is there an easy way in C++ to have a message lookup table that allows the use of variables. </p> <p>For example in C you can have something like this:</p> <pre><code>const char* transaction_messages[] = { "UNAUTHORIZED", "UNKNOWN_ORDER", "UNKNOWN_DEALER", "UNKNOWN_COMMODITY", "INVALID_MESSAGE", "BOUGHT %d %s @ %f.1 FROM %s", //amount, commodity, price, dealer "SOLD %d %s @ %f.1 FROM %s", //amount, commodity, price, dealer "%d HAS BEEN FILLED", //order id "%d HAS BEEN REVOKED", //order id "%d %s %s %s %d %f.1 HAS BEEN POSTED", //order id, dealer, side, commodity, amount, price "%d %s %s %s %d %f.1" //order id, dealer, side, commodity, amount, price }; </code></pre> <p>and then use it in a function like thislike this:</p> <pre><code>void myfunction(int amount, char* commodity, double price, char* dealer){ char *msg = transaction_message[6]; printf(msg, amount, commodity, price, dealer); } </code></pre> <p>I want to be able to do the same with an ostream instead of having to do something with the &lt;&lt; operator where the same thing would look like:</p> <pre><code>ostream &lt;&lt; "BOUGHT" &lt;&lt; amount &lt;&lt; " " &lt;&lt; commodity &lt;&lt; " @ " &lt;&lt; price &lt;&lt; " FROM " &lt;&lt; dealer; </code></pre> <p>the only way I can think of doing this right now would be to have a bunch of inline functions that return strings and instead of having a char* table instead have a function table that looks up the inline functions. There must be an easier way tho.</p>
 

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