add const begin/end iterators to SurfaceCollection to let it work in range-based for loops (const)

This commit is contained in:
Joseph Lenox 2019-01-05 23:45:17 -06:00
parent f18c34006c
commit 748dd3c23a

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@ -78,6 +78,8 @@ class SurfaceCollection
Surfaces::iterator end() { return this->surfaces.end();}
Surfaces::const_iterator cbegin() const { return this->surfaces.cbegin();}
Surfaces::const_iterator cend() const { return this->surfaces.cend();}
Surfaces::const_iterator begin() const { return this->surfaces.cbegin();}
Surfaces::const_iterator end() const { return this->surfaces.cend();}
};
}