void visit_builtin_texture(FunctionCall &, const std::vector<Id> &);
void visit_builtin_texel_fetch(FunctionCall &, const std::vector<Id> &);
void visit_builtin_interpolate(FunctionCall &, const std::vector<Id> &);
void visit_builtin_texture(FunctionCall &, const std::vector<Id> &);
void visit_builtin_texel_fetch(FunctionCall &, const std::vector<Id> &);
void visit_builtin_interpolate(FunctionCall &, const std::vector<Id> &);