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STL map lookup table initialization

Posted on 2012-03-31
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Last Modified: 2012-04-01
Hi Experts,

I have a map as below.
typedef map<std::string, IObject*> LookupTable_t;


I am initializing the map like below.
  m_lookupTable.insert(
            LookupTable_t::value_type(string1, 
                    new Runnable(this, &Parser::parseSomething)));

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Basically, it serves as a table for( string, function).
Can I do this initialization in something like :

table = [{string1, new Runnable(this, &Parser::parseSomething)}, 
             {string2, new Runnable(this, &Parser::parserOther)}]

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The reason I want to do this because I have many entries in the table and the second way seems to better(just for readability...)
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Question by:ambuli
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2 Comments
 
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Accepted Solution

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Infinity08 earned 2000 total points
ID: 37792465
IN C++11, you can initialize std::map's as follows :

std::map<std::string, std::string, IObject*> lookupTable {
    { "object1", new Object(1) },
    { "object2", new Object(2) }
};

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In C++03, you'll have to do a bit more work. Probably one of the easiest is to write a function that performs the initialization :

std::map<std::string, std::string, IObject*> createLookupTable() {
    std::map<std::string, std::string, IObject*> lookupTable;
    lookupTable["object1"] = new Object(1);
    lookupTable["object2"] = new Object(2);
    return lookupTable;
}
std::map<std::string, std::string, IObject*> lookupTable = createLookupTable();

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Author Closing Comment

by:ambuli
ID: 37794393
Thanks
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