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POCompiler Error on code with GCC that worked on Windows
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  1. POCompiler Error on code with GCC that worked on Windows
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    copied!<p>I have a simple piece of code that is giving me a compiler error. I've had no issues compiling and running this in a windows environment under Visual Studio, but now under linux, using gcc, I am having problems. Note I am using <strong>gcc 4.4.5</strong>, and using the <strong>-std=c++0x</strong> directive.</p> <p>This code snippet is in a header file, file_handling.h, which does include all the necessary libraries (vector, string, fstream, etc). The variable 'output_file' is a member of the LogFile object, and gets properly checked/instantiated/etc elsewhere. The code itself is trivially simple, which is why I am stumped:</p> <pre><code>template &lt;typename T&gt; void LogFile::put(std::string const &amp; header, std::vector&lt;T&gt; const &amp; data) { output_file &lt;&lt; header &lt;&lt; " " &lt;&lt; std::scientific &lt;&lt; data[0] &lt;&lt; std::endl; for (std::vector&lt;T&gt;::const_iterator value = (data.begin()+1); value &lt; data.end(); ++value) { output_file &lt;&lt; *value &lt;&lt; std::endl; } } </code></pre> <p>The compiler states:</p> <pre><code>In file included from file_handling.cpp:2: file_handling.h: In member function 'void LogFile::put(const std::string&amp;, const std::vector&lt;T, std::allocator&lt;_Tp1&gt; &gt;&amp;)': file_handling.h:132: error: expected ';' before 'value' file_handling.h:132: error: 'value' was not declared in this scope make: *** [file_handling.o] Error 1 </code></pre> <p>Why does gcc not see the in-situ declaration of 'value' as a const_iterator? I've tried the following as a sanity check:</p> <pre><code>template &lt;typename T&gt; void LogFile::put(std::string const &amp; header, std::vector&lt;T&gt; const &amp; data) { std::vector&lt;T&gt;::const_iterator value; output_file &lt;&lt; header &lt;&lt; " " &lt;&lt; std::scientific &lt;&lt; data[0] &lt;&lt; std::endl; for (value = (data.begin()+1); value &lt; data.end(); ++value) { output_file &lt;&lt; *value &lt;&lt; std::endl; } } </code></pre> <p>And receive the exact same compiler report. Given this looks simple, and worked fine in Visual Studio, what am I missing or misunderstanding about gcc and/or a Linux environment?</p>
 

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