Refactor groupBy and sortBy

bench_test.go

@@ -486,7 +486,7 @@ func Benchmark_sortBy(b *testing.B) {
 		env["arr"].([]Foo)[i] = Foo{Value: v.(int)}
 	}
 
-	program, err := expr.Compile(`sortBy(arr, "Value")`, expr.Env(env))
+	program, err := expr.Compile(`sortBy(arr, .Value)`, expr.Env(env))
 	require.NoError(b, err)
 
 	var out any

builtin/builtin.go

@@ -87,6 +87,11 @@ var Builtins = []*Function{
 		Predicate: true,
 		Types:     types(new(func([]any, func(any) any) map[any][]any)),
 	},
+	{
+		Name:      "sortBy",
+		Predicate: true,
+		Types:     types(new(func([]any, func(any) bool, string) []any)),
+	},
 	{
 		Name:      "reduce",
 		Predicate: true,
@@ -905,109 +910,65 @@ var Builtins = []*Function{
 	},
 	{
 		Name: "sort",
-		Func: func(args ...any) (any, error) {
+		Safe: func(args ...any) (any, uint, error) {
 			if len(args) != 1 && len(args) != 2 {
-				return nil, fmt.Errorf("invalid number of arguments (expected 1 or 2, got %d)", len(args))
+				return nil, 0, fmt.Errorf("invalid number of arguments (expected 1 or 2, got %d)", len(args))
 			}
 
-			v := reflect.ValueOf(args[0])
-			if v.Kind() != reflect.Slice && v.Kind() != reflect.Array {
-				return nil, fmt.Errorf("cannot sort %s", v.Kind())
-			}
+			var array []any
 
-			orderBy := OrderBy{}
-			if len(args) == 2 {
-				dir, err := ascOrDesc(args[1])
-				if err != nil {
-					return nil, err
+			switch in := args[0].(type) {
+			case []any:
+				array = make([]any, len(in))
+				copy(array, in)
+			case []int:
+				array = make([]any, len(in))
+				for i, v := range in {
+					array[i] = v
+				}
+			case []float64:
+				array = make([]any, len(in))
+				for i, v := range in {
+					array[i] = v
+				}
+			case []string:
+				array = make([]any, len(in))
+				for i, v := range in {
+					array[i] = v
 				}
-				orderBy.Desc = dir
 			}
 
-			sortable, err := copyArray(v, orderBy)
-			if err != nil {
-				return nil, err
-			}
-			sort.Sort(sortable)
-			return sortable.Array, nil
-		},
-		Validate: func(args []reflect.Type) (reflect.Type, error) {
-			if len(args) != 1 && len(args) != 2 {
-				return anyType, fmt.Errorf("invalid number of arguments (expected 1 or 2, got %d)", len(args))
-			}
-			switch kind(args[0]) {
-			case reflect.Interface, reflect.Slice, reflect.Array:
-			default:
-				return anyType, fmt.Errorf("cannot sort %s", args[0])
-			}
+			var desc bool
 			if len(args) == 2 {
-				switch kind(args[1]) {
-				case reflect.String, reflect.Interface:
+				switch args[1].(string) {
+				case "asc":
+					desc = false
+				case "desc":
+					desc = true
 				default:
-					return anyType, fmt.Errorf("invalid argument for sort (expected string, got %s)", args[1])
+					return nil, 0, fmt.Errorf("invalid order %s, expected asc or desc", args[1])
 				}
 			}
-			return arrayType, nil
-		},
-	},
-	{
-		Name: "sortBy",
-		Func: func(args ...any) (any, error) {
-			if len(args) != 2 && len(args) != 3 {
-				return nil, fmt.Errorf("invalid number of arguments (expected 2 or 3, got %d)", len(args))
-			}
 
-			v := reflect.ValueOf(args[0])
-			if v.Kind() != reflect.Slice && v.Kind() != reflect.Array {
-				return nil, fmt.Errorf("cannot sort %s", v.Kind())
-			}
-
-			orderBy := OrderBy{}
-
-			field, ok := args[1].(string)
-			if !ok {
-				return nil, fmt.Errorf("invalid argument for sort (expected string, got %s)", reflect.TypeOf(args[1]))
-			}
-			orderBy.Field = field
-
-			if len(args) == 3 {
-				dir, err := ascOrDesc(args[2])
-				if err != nil {
-					return nil, err
-				}
-				orderBy.Desc = dir
-			}
-
-			sortable, err := copyArray(v, orderBy)
-			if err != nil {
-				return nil, err
+			sortable := &runtime.Sort{
+				Desc:  desc,
+				Array: array,
 			}
 			sort.Sort(sortable)
-			return sortable.Array, nil
-		},
-		Validate: func(args []reflect.Type) (reflect.Type, error) {
-			if len(args) != 2 && len(args) != 3 {
-				return anyType, fmt.Errorf("invalid number of arguments (expected 2 or 3, got %d)", len(args))
-			}
-			switch kind(args[0]) {
-			case reflect.Interface, reflect.Slice, reflect.Array:
-			default:
-				return anyType, fmt.Errorf("cannot sort %s", args[0])
-			}
-			switch kind(args[1]) {
-			case reflect.String, reflect.Interface:
-			default:
-				return anyType, fmt.Errorf("invalid argument for sort (expected string, got %s)", args[1])
-			}
-			if len(args) == 3 {
-				switch kind(args[2]) {
-				case reflect.String, reflect.Interface:
-				default:
-					return anyType, fmt.Errorf("invalid argument for sort (expected string, got %s)", args[1])
-				}
-			}
-			return arrayType, nil
+
+			return sortable.Array, uint(len(array)), nil
 		},
+		Types: types(
+			new(func([]any, string) []any),
+			new(func([]int, string) []any),
+			new(func([]float64, string) []any),
+			new(func([]string, string) []any),
+
+			new(func([]any) []any),
+			new(func([]float64) []any),
+			new(func([]string) []any),
+			new(func([]int) []any),
+		),
 	},
 	bitFunc("bitand", func(x, y int) (any, error) {
 		return x & y, nil

builtin/builtin_test.go

@@ -530,8 +530,8 @@ func TestBuiltin_sort(t *testing.T) {
 		{`sort(ArrayOfInt)`, []any{1, 2, 3}},
 		{`sort(ArrayOfFloat)`, []any{1.0, 2.0, 3.0}},
 		{`sort(ArrayOfInt, 'desc')`, []any{3, 2, 1}},
-		{`sortBy(ArrayOfFoo, 'Value')`, []any{mock.Foo{Value: "a"}, mock.Foo{Value: "b"}, mock.Foo{Value: "c"}}},
-		{`sortBy([{id: "a"}, {id: "b"}], "id", "desc")`, []any{map[string]any{"id": "b"}, map[string]any{"id": "a"}}},
+		{`sortBy(ArrayOfFoo, .Value)`, []any{mock.Foo{Value: "a"}, mock.Foo{Value: "b"}, mock.Foo{Value: "c"}}},
+		{`sortBy([{id: "a"}, {id: "b"}], .id, "desc")`, []any{map[string]any{"id": "b"}, map[string]any{"id": "a"}}},
 	}
 
 	for _, test := range tests {
@@ -546,6 +546,20 @@ func TestBuiltin_sort(t *testing.T) {
 	}
 }
 
+func TestBuiltin_sort_i64(t *testing.T) {
+	env := map[string]any{
+		"array": []int{1, 2, 3},
+		"i64":   int64(1),
+	}
+
+	program, err := expr.Compile(`sort(map(array, i64))`, expr.Env(env))
+	require.NoError(t, err)
+
+	out, err := expr.Run(program, env)
+	require.NoError(t, err)
+	assert.Equal(t, []any{int64(1), int64(1), int64(1)}, out)
+}
+
 func TestBuiltin_bitOpsFunc(t *testing.T) {
 	tests := []struct {
 		input string

checker/checker.go

@@ -633,7 +633,7 @@ func (v *checker) BuiltinNode(node *ast.BuiltinNode) (reflect.Type, info) {
 			if isAny(collection) {
 				return arrayType, info{}
 			}
-			return reflect.SliceOf(collection.Elem()), info{}
+			return arrayType, info{}
 		}
 		return v.error(node.Arguments[1], "predicate should has one input and one output param")
 
@@ -651,7 +651,7 @@ func (v *checker) BuiltinNode(node *ast.BuiltinNode) (reflect.Type, info) {
 			closure.NumOut() == 1 &&
 			closure.NumIn() == 1 && isAny(closure.In(0)) {
 
-			return reflect.SliceOf(closure.Out(0)), info{}
+			return arrayType, info{}
 		}
 		return v.error(node.Arguments[1], "predicate should has one input and one output param")
 
@@ -739,6 +739,28 @@ func (v *checker) BuiltinNode(node *ast.BuiltinNode) (reflect.Type, info) {
 		}
 		return v.error(node.Arguments[1], "predicate should has one input and one output param")
 
+	case "sortBy":
+		collection, _ := v.visit(node.Arguments[0])
+		if !isArray(collection) && !isAny(collection) {
+			return v.error(node.Arguments[0], "builtin %v takes only array (got %v)", node.Name, collection)
+		}
+
+		v.begin(collection)
+		closure, _ := v.visit(node.Arguments[1])
+		v.end()
+
+		if len(node.Arguments) == 3 {
+			_, _ = v.visit(node.Arguments[2])
+		}
+
+		if isFunc(closure) &&
+			closure.NumOut() == 1 &&
+			closure.NumIn() == 1 && isAny(closure.In(0)) {
+
+			return reflect.TypeOf([]any{}), info{}
+		}
+		return v.error(node.Arguments[1], "predicate should has one input and one output param")
+
 	case "reduce":
 		collection, _ := v.visit(node.Arguments[0])
 		if !isArray(collection) && !isAny(collection) {

checker/checker_test.go

@@ -400,11 +400,6 @@ invalid operation: < (mismatched types mock.Bar and int) (1:29)
  | all(ArrayOfFoo, {#.Method() < 0})
  | ............................^
 
-map(Any, {0})[0] + "str"
-invalid operation: + (mismatched types int and string) (1:18)
- | map(Any, {0})[0] + "str"
- | .................^
-
 Variadic()
 not enough arguments to call Variadic (1:1)
  | Variadic()
@@ -445,11 +440,6 @@ builtin map takes only array (got int) (1:5)
  | map(1, {2})
  | ....^
 
-map(filter(ArrayOfFoo, {true}), {.Not})
-type mock.Foo has no field Not (1:35)
- | map(filter(ArrayOfFoo, {true}), {.Not})
- | ..................................^
-
 ArrayOfFoo[Foo]
 array elements can only be selected using an integer (got mock.Foo) (1:12)
  | ArrayOfFoo[Foo]