request: switch all request types to value receivers and value returns

All New*Request() constructors now return values instead of pointers. All
methods on request types use value receivers and return values, enabling
immutable builder-style chaining.

Renamed all value constructors from Make* to New* for naming consistency
across the connector: crud.Make*Request → crud.New*Request,
datetime.MakeDatetime → datetime.NewDatetime, decimal.MakeDecimal /
MakeDecimalFromString / MustMakeDecimal → decimal.NewDecimal /
NewDecimalFromString / MustNewDecimal, arrow.MakeArrow → arrow.NewArrow,
crud.MakeResult → crud.NewResult.

Removed intermediate spaceRequest, spaceIndexRequest types from the
tarantool package and spaceRequest from the crud package — space and
index fields are inlined directly into each request struct.

Converted all constructors to composite literal style.

Applied the same pattern to arrow/ and settings/ packages.

In the box/ subpackage, request types no longer embed
tarantool.CallRequest. They store it as a private field via
baseCallRequest and implement their own Context() method returning the
wrapper type.

Part of #238

Author: bigbes

CHANGELOG.md

@@ -45,6 +45,19 @@ Versioning](http://semver.org/spec/v2.0.0.html) except to the first release.
 
 ### Changed
 
+* All top-level `New*Request()` constructors now return values instead of
+  pointers. All methods on request types use value receivers and return
+  values, enabling immutable builder-style chaining.
+* Renamed value constructors `Make*` to `New*` for naming consistency across
+  the connector. Affects `crud.Make*Request` (now `crud.New*Request`),
+  `datetime.MakeDatetime` (now `datetime.NewDatetime`), `decimal.MakeDecimal`
+  and `decimal.MakeDecimalFromString` (now `decimal.NewDecimal` and
+  `decimal.NewDecimalFromString`), `decimal.MustMakeDecimal` (now
+  `decimal.MustNewDecimal`), `arrow.MakeArrow` (now `arrow.NewArrow`), and
+  `crud.MakeResult` (now `crud.NewResult`).
+* Removed intermediate `spaceRequest`, `spaceIndexRequest` types — `space`
+  and `index` fields are now inlined directly into each request struct.
+  The same flattening was applied to `crud.spaceRequest`.
 * Required Go version is `1.24` now (#456).
 * `test_helpers.MockDoer` is now an interface instead of a struct. The
   `Requests` field became a method `Requests()`. The `NewMockDoer()`

MIGRATION.md

@@ -182,6 +182,51 @@ TODO
   stream, _ := conn.NewStream()
   log.Printf("opened stream on %v", conn)
   ```
+* All request types (`PingRequest`, `SelectRequest`, `CallRequest`, etc.) now
+  use value receivers and constructors return values instead of pointers.
+  Builder methods return modified copies instead of mutating in place.
+
+  **Breaking**: calling a builder method without using its return value silently
+  discards the change:
+  ```Go
+  // Before (pointer receivers, mutation in place):
+  req := NewSelectRequest("space")
+  req.Index("idx")           // mutated req directly
+  conn.Do(req)
+
+  // After (value receivers, must use return value):
+  req := NewSelectRequest("space")
+  req = req.Index("idx")     // must reassign
+  conn.Do(req)
+
+  // Or chain directly:
+  conn.Do(NewSelectRequest("space").Index("idx"))
+  ```
+
+  The same value-receiver pattern was applied to `arrow.InsertRequest` and
+  `settings.SetRequest`/`settings.GetRequest`.
+
+  In the `box` subpackage, request types (`InfoRequest`, `UserExistsRequest`,
+  `UserCreateRequest`, `SessionSuRequest`, etc.) no longer embed
+  `tarantool.CallRequest`. They store it as a private field and implement
+  their own `Context()` method returning the wrapper type. Usage stays clean:
+  ```Go
+  req := box.NewUserExistsRequest(username).Context(ctx)
+  ```
+* Renamed value constructors from `Make*` to `New*` for naming consistency
+  across the connector. Previously, the main package used `New*Request` while
+  the `crud` package and value-type constructors used `Make*`. They now all
+  use the `New*` prefix.
+
+  | Before | After |
+  |---|---|
+  | `datetime.MakeDatetime` | `datetime.NewDatetime` |
+  | `decimal.MakeDecimal` | `decimal.NewDecimal` |
+  | `decimal.MakeDecimalFromString` | `decimal.NewDecimalFromString` |
+  | `decimal.MustMakeDecimal` | `decimal.MustNewDecimal` |
+  | `arrow.MakeArrow` | `arrow.NewArrow` |
+  | `crud.MakeResult` | `crud.NewResult` |
+  | `crud.Make*Request` (all of them) | `crud.New*Request` |
 
 ## Migration from v1.x.x to v2.x.x
 
@@ -440,12 +485,13 @@ is supported.
 
 Now you need to use objects of the Datetime type instead of pointers to it. A
 new constructor `MakeDatetime` returns an object. `NewDatetime` has been
-removed.
+removed. (`MakeDatetime` was later renamed back to `NewDatetime` in v3.)
 
 ### decimal package
 
 Now you need to use objects of the Decimal type instead of pointers to it. A
 new constructor `MakeDecimal` returns an object. `NewDecimal` has been removed.
+(`MakeDecimal` was later renamed back to `NewDecimal` in v3.)
 
 ### multi package
 

arrow/arrow.go

@@ -17,9 +17,9 @@ type Arrow struct {
 	data []byte
 }
 
-// MakeArrow returns a new arrow.Arrow object that contains
+// NewArrow returns a new arrow.Arrow object that contains
 // wrapped a raw arrow data buffer.
-func MakeArrow(arrow []byte) (Arrow, error) {
+func NewArrow(arrow []byte) (Arrow, error) {
 	return Arrow{arrow}, nil
 }
 

arrow/arrow_gen_test.go

@@ -10,7 +10,7 @@ import (
 )
 
 func TestSomeOptionalArrow(t *testing.T) {
-	val, err := MakeArrow([]byte{1, 2, 3})
+	val, err := NewArrow([]byte{1, 2, 3})
 	require.NoError(t, err)
 	opt := SomeOptionalArrow(val)
 
@@ -33,7 +33,7 @@ func TestNoneOptionalArrow(t *testing.T) {
 }
 
 func TestOptionalArrow_MustGet(t *testing.T) {
-	val, err := MakeArrow([]byte{1, 2, 3})
+	val, err := NewArrow([]byte{1, 2, 3})
 	require.NoError(t, err)
 	optSome := SomeOptionalArrow(val)
 	optNone := NoneOptionalArrow()
@@ -43,7 +43,7 @@ func TestOptionalArrow_MustGet(t *testing.T) {
 }
 
 func TestOptionalArrow_Unwrap(t *testing.T) {
-	val, err := MakeArrow([]byte{1, 2, 3})
+	val, err := NewArrow([]byte{1, 2, 3})
 	require.NoError(t, err)
 	optSome := SomeOptionalArrow(val)
 	optNone := NoneOptionalArrow()
@@ -53,9 +53,9 @@ func TestOptionalArrow_Unwrap(t *testing.T) {
 }
 
 func TestOptionalArrow_UnwrapOr(t *testing.T) {
-	val, err := MakeArrow([]byte{1, 2, 3})
+	val, err := NewArrow([]byte{1, 2, 3})
 	require.NoError(t, err)
-	def, err := MakeArrow([]byte{4, 5, 6})
+	def, err := NewArrow([]byte{4, 5, 6})
 	require.NoError(t, err)
 	optSome := SomeOptionalArrow(val)
 	optNone := NoneOptionalArrow()
@@ -65,9 +65,9 @@ func TestOptionalArrow_UnwrapOr(t *testing.T) {
 }
 
 func TestOptionalArrow_UnwrapOrElse(t *testing.T) {
-	val, err := MakeArrow([]byte{1, 2, 3})
+	val, err := NewArrow([]byte{1, 2, 3})
 	require.NoError(t, err)
-	def, err := MakeArrow([]byte{4, 5, 6})
+	def, err := NewArrow([]byte{4, 5, 6})
 	require.NoError(t, err)
 	optSome := SomeOptionalArrow(val)
 	optNone := NoneOptionalArrow()
@@ -77,7 +77,7 @@ func TestOptionalArrow_UnwrapOrElse(t *testing.T) {
 }
 
 func TestOptionalArrow_EncodeDecodeMsgpack_Some(t *testing.T) {
-	val, err := MakeArrow([]byte{1, 2, 3})
+	val, err := NewArrow([]byte{1, 2, 3})
 	require.NoError(t, err)
 	some := SomeOptionalArrow(val)
 

arrow/arrow_test.go

@@ -72,7 +72,7 @@ func TestEncodeArrow(t *testing.T) {
 			buf := bytes.NewBuffer([]byte{})
 			enc := msgpack.NewEncoder(buf)
 
-			arr, err := arrow.MakeArrow(tt.arr)
+			arr, err := arrow.NewArrow(tt.arr)
 			require.NoError(t, err)
 
 			err = enc.Encode(arr)

arrow/example_test.go

@@ -42,7 +42,7 @@ func Example() {
 		log.Fatalf("Failed to connect: %s", err)
 	}
 
-	arr, err := arrow.MakeArrow(arrowBinData)
+	arr, err := arrow.NewArrow(arrowBinData)
 	if err != nil {
 		log.Fatalf("Failed prepare Arrow data: %s", err)
 	}

arrow/request.go

@@ -19,25 +19,25 @@ type InsertRequest struct {
 }
 
 // NewInsertRequest returns a new InsertRequest.
-func NewInsertRequest(space any, arrow Arrow) *InsertRequest {
-	return &InsertRequest{
+func NewInsertRequest(space any, arrow Arrow) InsertRequest {
+	return InsertRequest{
 		space: space,
 		arrow: arrow,
 	}
 }
 
 // Type returns a IPROTO_INSERT_ARROW type for the request.
-func (r *InsertRequest) Type() iproto.Type {
+func (r InsertRequest) Type() iproto.Type {
 	return iproto.IPROTO_INSERT_ARROW
 }
 
 // Async returns false to the request return a response.
-func (r *InsertRequest) Async() bool {
+func (r InsertRequest) Async() bool {
 	return false
 }
 
 // Ctx returns a context of the request.
-func (r *InsertRequest) Ctx() context.Context {
+func (r InsertRequest) Ctx() context.Context {
 	return r.ctx
 }
 
@@ -47,20 +47,20 @@ func (r *InsertRequest) Ctx() context.Context {
 // the timeout option for Connection does not affect the lifetime
 // of the request. For those purposes use context.WithTimeout() as
 // the root context.
-func (r *InsertRequest) Context(ctx context.Context) *InsertRequest {
+func (r InsertRequest) Context(ctx context.Context) InsertRequest {
 	r.ctx = ctx
 	return r
 }
 
 // Arrow sets the arrow for insertion the insert arrow request.
 // Note: default value is nil.
-func (r *InsertRequest) Arrow(arrow Arrow) *InsertRequest {
+func (r InsertRequest) Arrow(arrow Arrow) InsertRequest {
 	r.arrow = arrow
 	return r
 }
 
 // Body fills an msgpack.Encoder with the insert arrow request body.
-func (r *InsertRequest) Body(res tarantool.SchemaResolver, enc *msgpack.Encoder) error {
+func (r InsertRequest) Body(res tarantool.SchemaResolver, enc *msgpack.Encoder) error {
 	if err := enc.EncodeMapLen(2); err != nil {
 		return err
 	}
@@ -74,7 +74,7 @@ func (r *InsertRequest) Body(res tarantool.SchemaResolver, enc *msgpack.Encoder)
 }
 
 // Response creates a response for the InsertRequest.
-func (r *InsertRequest) Response(
+func (r InsertRequest) Response(
 	header tarantool.Header,
 	body io.Reader,
 ) (tarantool.Response, error) {

arrow/request_test.go

@@ -129,7 +129,7 @@ func TestInsertRequestSetters(t *testing.T) {
 	buf := bytes.NewBuffer([]byte{})
 	enc := msgpack.NewEncoder(buf)
 
-	arr, err := arrow.MakeArrow([]byte{'a', 'b', 'c'})
+	arr, err := arrow.NewArrow([]byte{'a', 'b', 'c'})
 	require.NoError(t, err)
 
 	resolver := stubSchemeResolver{validSpace}

arrow/tarantool_test.go

@@ -71,7 +71,7 @@ func TestInsert_invalid(t *testing.T) {
 			data, err := hex.DecodeString(a.arrow)
 			require.NoError(t, err)
 
-			arr, err := arrow.MakeArrow(data)
+			arr, err := arrow.NewArrow(data)
 			require.NoError(t, err)
 
 			req := arrow.NewInsertRequest(space, arr)

box/info.go

@@ -1,14 +1,15 @@
 package box
 
 import (
+	"context"
 	"fmt"
 
 	"github.com/vmihailenco/msgpack/v5"
 
 	"github.com/tarantool/go-tarantool/v3"
 )
 
-var _ tarantool.Request = (*InfoRequest)(nil)
+var _ tarantool.Request = InfoRequest{}
 
 // Info represents detailed information about the Tarantool instance.
 // It includes version, node ID, read-only status, process ID, cluster information, and more.
@@ -112,14 +113,20 @@ func (ir *InfoResponse) DecodeMsgpack(d *msgpack.Decoder) error {
 // InfoRequest represents a request to retrieve information about the Tarantool instance.
 // It implements the tarantool.Request interface.
 type InfoRequest struct {
-	*tarantool.CallRequest // Underlying Tarantool call request.
+	baseCallRequest
 }
 
 // NewInfoRequest returns a new empty info request.
 func NewInfoRequest() InfoRequest {
-	callReq := tarantool.NewCallRequest("box.info")
-
 	return InfoRequest{
-		callReq,
+		baseCallRequest: baseCallRequest{
+			call: tarantool.NewCallRequest("box.info"),
+		},
 	}
 }
+
+// Context sets a passed context to the request.
+func (req InfoRequest) Context(ctx context.Context) InfoRequest {
+	req.call = req.call.Context(ctx)
+	return req
+}