Function checkFunc

patcher/operator_override.go:139–148

(fn *builtin.Function, name string, operator string)

}

func checkFunc(fn *builtin.Function, name string, operator string) {
	if len(fn.Types) == 0 {
		panic(fmt.Errorf("function %q for %q operator misses types", name, operator))
	}
	for _, t := range fn.Types {
		if t.NumIn() != 2 || t.NumOut() != 1 {
			panic(fmt.Errorf("function %q for %q operator does not have a correct signature", name, operator))
		}
	}
}