virtual void visit(MemberAccess &);
virtual void visit(Swizzle &);
virtual void visit(BinaryExpression &);
virtual void visit(Assignment &);
void merge_layouts(Layout &, const Layout &);
virtual void visit(MemberAccess &);
virtual void visit(Swizzle &);
virtual void visit(BinaryExpression &);
virtual void visit(Assignment &);
void merge_layouts(Layout &, const Layout &);