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POconflicting declaration when filling a static std::map class member variable
 

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  1. POconflicting declaration when filling a static std::map class member variable
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    <p>I have a class with a static std::map member variable that maps <code>char</code>s to a custom type <code>Terrain</code>. I'm attempting to fill this map in the class's implementation file, but I get several errors. Here's my header file:</p> <pre><code>#ifndef LEVEL_HPP #define LEVEL_HPP #include &lt;bitset&gt; #include &lt;list&gt; #include &lt;map&gt; #include &lt;string&gt; #include &lt;vector&gt; #include "libtcod.hpp" namespace yarl { namespace level { class Terrain { // Member Variables private: std::bitset&lt;5&gt; flags; // Member Functions public: explicit Terrain(const std::string&amp; flg) : flags(flg) {} (...) }; class Level { private: static std::map&lt;char, Terrain&gt; terrainTypes; (...) }; } } #endif </code></pre> <p>and here's my implementation file:</p> <pre><code>#include &lt;bitset&gt; #include &lt;list&gt; #include &lt;map&gt; #include &lt;string&gt; #include &lt;vector&gt; #include "Level.hpp" #include "libtcod.hpp" using namespace std; namespace yarl { namespace level { /* fill Level::terrainTypes */ map&lt;char,Terrain&gt; Level::terrainTypes['.'] = Terrain("00001"); // clear map&lt;char,Terrain&gt; Level::terrainTypes[','] = Terrain("00001"); // clear map&lt;char,Terrain&gt; Level::terrainTypes['\''] = Terrain("00001"); // clear map&lt;char,Terrain&gt; Level::terrainTypes['`'] = Terrain("00001"); // clear map&lt;char,Terrain&gt; Level::terrainTypes[178] = Terrain("11111"); // wall (...) } } </code></pre> <p>I'm using g++, and the errors I get are</p> <p>src/Level.cpp:15: error: conflicting declaration ‘std::map, std::allocator > > yarl::level::Level::terrainTypes [46]’<br> src/Level.hpp:104: error: ‘yarl::level::Level::terrainTypes’ has a previous declaration as ‘std::map, std::allocator > > yarl::level::Level::terrainTypes’<br> src/Level.cpp:15: error: declaration of ‘std::map, std::allocator > > yarl::level::Level::terrainTypes’ outside of class is not definition<br> src/Level.cpp:15: error: conversion from ‘yarl::level::Terrain’ to non-scalar type ‘std::map, std::allocator > >’ requested<br> src/Level.cpp:15: error: ‘yarl::level::Level::terrainTypes’ cannot be initialized by a non-constant expression when being declared</p> <p>I get a set of these for each map assignment line in the implementation file. Anyone see what I'm doing wrong? Thanks for your help.</p>
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