std::array

[Cronnoc]

I am following this tutorial: SFML Game Development and i have checked and double checked and even copy and pasted this code and i still get the same error.

std::array<SceneNode*, LayerCount> mSceneLayers;

Error:

field 'mSceneLayers' has incomplete type

that is all it says it doesn't tell me anymore then that. please help

[JLBorges]

#include <array>

[Smac89]

What is SceneNode and LayerCount? How are those defined?