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POTerm not evaluated to a function in C++
 

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  1. POTerm not evaluated to a function in C++
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    <p>I have following code, which i taken from Boost and simplified for my project. Please accept my aplogies for pasting complete code, i done it so that it will be easy to answer my question. While compiling following code in VS 2008 i am getting followoing error.</p> <pre><code>error C2064: term does not evaluate to a function taking 3 arguments </code></pre> <p>I am expecting addOptions retruns OptionsInit object which call function operator with three arguments but that is not happening, can any one please find bug. Thanks in advance.</p> <pre><code>namespace MyInfrastructure { namespace Internal { class OptionDescrp; class OptionsInit; } class OptionsCollection { public: OptionsCollection(std::string optCollName); Internal::OptionsInit addOptions(); private: // avoid copying and assignment. // Prohibit copy OptionsCollection( const OptionsCollection&amp; ); OptionsCollection&amp; operator = (const OptionsCollection&amp; ); void add(Internal::OptionDescrp* desc) {m_options.push_back(desc);} std::vector&lt;Internal::OptionDescrp* &gt; m_options; std::string m_optCollName; friend class Internal::OptionsInit; }; } //////////// #include &lt;string&gt; #include &lt;vector&gt; #include &lt;assert.h&gt; #include "PrgmOptions.h" namespace MyInfrastructure { namespace Internal { class OptionDescrp { public: OptionDescrp(std::string pcOptname, std::string description, bool isOptValueReq); virtual ~OptionDescrp(){ }; private: std::string m_shortName; // option short name. std::string m_longName; // option long name. std::string m_description;// option description. }; class OptionsInit { public: OptionsInit(OptionsCollection* coll){ owner = coll; } OptionsInit&amp; operator()(std::string name, std::string description, bool isOptValReq); private: OptionsCollection* owner; }; } ///// namespace MyInfrastructure { OptionsCollection::OptionsCollection(std::string optCollName) : m_optCollName(optCollName) {} Internal::OptionsInit OptionsCollection::addOptions() { return Internal::OptionsInit(this); } } namespace MyInfrastructure { namespace Internal { // Class Options description definitions. OptionDescrp::OptionDescrp(std::string pcOptname, std::string description, bool isOptValueReq) : m_description(description) { std::string name(pcOptname); std::string::size_type n = name.find(','); if (n != std::string::npos) { assert(n == name.size()-2); m_longName = name.substr(0, n); m_shortName = '-' + name.substr(n+1,1); } else { m_longName = name; } } // Class Options Init definitions. OptionsInit&amp; OptionsInit::operator()(std::string name, std::string description, bool isOptValReq) { OptionDescrp* opt = new OptionDescrp(name, description, isOptValReq); owner-&gt;add(opt); return *this; } } } ////// int main(void) { MyInfrastructure::OptionsCollection desc("myoptions"); **desc.addOptions()("help", "produce help message", false); // error is thrown here** return 0; } </code></pre>
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    1. USvenkysmarty
    1. USvenkysmarty
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    1. COYour code example is incomplete - you're missing a closing brace before "/////" line; after fixing that and adding #include <string> #include <vector> at the beginning, the code compiles fine in MSVC2008 (2009 version does not exist) and GCC.
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      1. USzeuxcg
    2. COFirst, the error message doubtless came with a line number, but I don't see a line indicated. Please point out which line got the error. Also, you wrote VS 2009. Did you mean VS 2008?
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      1. POTerm not evaluated to a function in C++
      1. USDavid Thornley
    3. COi am still getting the error, i am using VS2008
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      1. USvenkysmarty
 

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