Method Add

server/functions/framework/overloads.go:44–60

Add adds the given function to the overload collection. Returns an error if the there's a problem with the function's declaration.

(function FunctionInterface)

// Add adds the given function to the overload collection. Returns an error if the there's a problem with the
// function's declaration.
func (o *Overloads) Add(function FunctionInterface) error {
	key := keyForParamTypes(function.GetParameters())
	if _, ok := o.ByParamType[key]; ok {
		return errors.Errorf("duplicate function overload for `%s`", function.GetName())
	}

	if function.VariadicIndex() >= 0 {
		varArgsType := function.GetParameters()[function.VariadicIndex()]
		if !varArgsType.IsArrayType() {
			return errors.Errorf("variadic parameter must be an array type for function `%s`", function.GetName())
		}
	}

	o.ByParamType[key] = function
	o.AllOverloads = append(o.AllOverloads, function)
	return nil
}

// keyForParamTypes returns a string key to match an overload with the given parameter types.
func keyForParamTypes(types []*pgtypes.DoltgresType) string {