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POProblems inheriting from a class in the same namespace in C++
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  1. POProblems inheriting from a class in the same namespace in C++
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    copied!<p>I was happily working in C++, until compilation time arrived.</p> <p>I've got several classes inside some namespace (let's call it N); two of these classes correspond to one base class, and other derived from it. Each class has its own pair of .hpp and .cpp files; I think it'd look like:</p> <pre><code>namespace N{ class Base{ }; class Derived: public Base{ }; } </code></pre> <p>However, g++ (maybe linker) keeps telling me:</p> <pre><code>Derived.hpp:n: error: expected class-name before ‘{’ token </code></pre> <p>It doesn't recognize Base as a class, even when I have correctly #include'ed the hpp file corresponding to its definition to Derived's .hpp!</p> <p>"It's something with #includes", I thought, since these classes' .hpps are #included in other files, so I added this to Derived declaration in Derived.hpp:</p> <pre><code>#include "Base.hpp" namespace N{ class Base; class Derived: public Base{ }; } </code></pre> <p>And now g++ complains:</p> <pre><code>Derived.hpp:n: error: invalid use of incomplete type ‘struct N::Base’ </code></pre> <p>So, I got lost here. Please help me, I will apreciate it a lot. :)</p> <p>(By the way, I'm rather experienced in Python, not C++, so this issues are really strange to me. Also, I changed classes' names and stuff :).</p> <p><strong>Edit:</strong> A more exact representation of my files is:</p> <pre><code>File Pieza.hpp ----------------------- #include "Celda.hpp" namespace Reglas { class Pieza { public: Pieza() {} virtual ~Pieza() {} private: Celda *c; }; } File Jugador.hpp ----------------------- #include "Jugada.hpp" #include "Excepciones.hpp" #include "Pieza.hpp" namespace Reglas { //compiler asked for these :S class Celda; class Tablero; class Jugador : public Pieza { public: Jugador() {} virtual ~Jugador() {} }; } </code></pre>
 

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