Move BSON reflect types to where they're used.

Author: matthewdale

bson/marshal_test.go

@@ -22,6 +22,8 @@ import (
 	"go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
 )
 
+var tInt32 = reflect.TypeOf(int32(0))
+
 func TestMarshalAppendWithRegistry(t *testing.T) {
 	for _, tc := range marshalingTestCases {
 		t.Run(tc.name, func(t *testing.T) {

bson/primitive_codecs.go

@@ -14,6 +14,9 @@ import (
 	"go.mongodb.org/mongo-driver/bson/bsonrw"
 )
 
+var tRawValue = reflect.TypeOf(RawValue{})
+var tRaw = reflect.TypeOf(Raw(nil))
+
 var primitiveCodecs PrimitiveCodecs
 
 // PrimitiveCodecs is a namespace for all of the default bsoncodec.Codecs for the primitive types

bson/types.go

@@ -7,8 +7,6 @@
 package bson
 
 import (
-	"reflect"
-
 	"go.mongodb.org/mongo-driver/bson/bsontype"
 )
 
@@ -36,7 +34,3 @@ const (
 	TypeMinKey           = bsontype.MinKey
 	TypeMaxKey           = bsontype.MaxKey
 )
-
-var tRawValue = reflect.TypeOf(RawValue{})
-var tInt32 = reflect.TypeOf(int32(0))
-var tRaw = reflect.TypeOf(Raw(nil))