text: #ifndef GLSL_LOADER_HPP_
  #define GLSL_LOADER_HPP_
  
  #include <cstdlib>
  #include <exception>
  #include <stdexcept>
  #include <string>
  #include <GL/glew.h>
  
  struct shader_error : std::runtime_error
  {
      explicit shader_error(const std::string & s) : std::runtime_error(s)
      {
      }
  };
  
  GLuint loadShaders();
  
  #endif
  