Update dependencies (#1784)

vendor/github.com/graph-gophers/graphql-go/internal/exec/resolvable/meta.go

@@ -0,0 +1,70 @@
+package resolvable
+
+import (
+	"reflect"
+
+	"github.com/graph-gophers/graphql-go/introspection"
+	"github.com/graph-gophers/graphql-go/types"
+)
+
+// Meta defines the details of the metadata schema for introspection.
+type Meta struct {
+	FieldSchema   Field
+	FieldType     Field
+	FieldTypename Field
+	Schema        *Object
+	Type          *Object
+}
+
+func newMeta(s *types.Schema) *Meta {
+	var err error
+	b := newBuilder(s)
+
+	metaSchema := s.Types["__Schema"].(*types.ObjectTypeDefinition)
+	so, err := b.makeObjectExec(metaSchema.Name, metaSchema.Fields, nil, false, reflect.TypeOf(&introspection.Schema{}))
+	if err != nil {
+		panic(err)
+	}
+
+	metaType := s.Types["__Type"].(*types.ObjectTypeDefinition)
+	t, err := b.makeObjectExec(metaType.Name, metaType.Fields, nil, false, reflect.TypeOf(&introspection.Type{}))
+	if err != nil {
+		panic(err)
+	}
+
+	if err := b.finish(); err != nil {
+		panic(err)
+	}
+
+	fieldTypename := Field{
+		FieldDefinition: types.FieldDefinition{
+			Name: "__typename",
+			Type: &types.NonNull{OfType: s.Types["String"]},
+		},
+		TraceLabel: "GraphQL field: __typename",
+	}
+
+	fieldSchema := Field{
+		FieldDefinition: types.FieldDefinition{
+			Name: "__schema",
+			Type: s.Types["__Schema"],
+		},
+		TraceLabel: "GraphQL field: __schema",
+	}
+
+	fieldType := Field{
+		FieldDefinition: types.FieldDefinition{
+			Name: "__type",
+			Type: s.Types["__Type"],
+		},
+		TraceLabel: "GraphQL field: __type",
+	}
+
+	return &Meta{
+		FieldSchema:   fieldSchema,
+		FieldTypename: fieldTypename,
+		FieldType:     fieldType,
+		Schema:        so,
+		Type:          t,
+	}
+}