Use types from ast package

Author: pavelnikolov

internal/exec/validate.go

@@ -4,10 +4,10 @@ import (
 	"context"
 	"fmt"
 
+	"github.com/graph-gophers/graphql-go/ast"
 	"github.com/graph-gophers/graphql-go/errors"
 	"github.com/graph-gophers/graphql-go/internal/exec/resolvable"
 	"github.com/graph-gophers/graphql-go/internal/exec/selected"
-	"github.com/graph-gophers/graphql-go/types"
 )
 
 func collectFieldsToValidate(sels []selected.Selection, s *resolvable.Schema, fields *[]*fieldToValidate, fieldByAlias map[string]*fieldToValidate) {
@@ -69,18 +69,18 @@ func validateFieldSelection(ctx context.Context, s *resolvable.Schema, f *fieldT
 	return validateSelectionSet(ctx, f.sels, f.field.Type, path, s)
 }
 
-func validateSelectionSet(ctx context.Context, sels []selected.Selection, typ types.Type, path *pathSegment, s *resolvable.Schema) []*errors.QueryError {
+func validateSelectionSet(ctx context.Context, sels []selected.Selection, typ ast.Type, path *pathSegment, s *resolvable.Schema) []*errors.QueryError {
 	t, _ := unwrapNonNull(typ)
 
 	switch t.(type) {
-	case *types.ObjectTypeDefinition, *types.InterfaceTypeDefinition, *types.Union:
+	case *ast.ObjectTypeDefinition, *ast.InterfaceTypeDefinition, *ast.Union:
 		return validateSelections(ctx, sels, path, s)
 	}
 
 	switch t := t.(type) {
-	case *types.List:
+	case *ast.List:
 		return validateList(ctx, sels, t, path, s)
-	case *types.ScalarTypeDefinition, *types.EnumTypeDefinition:
+	case *ast.ScalarTypeDefinition, *ast.EnumTypeDefinition:
 		// Field resolution already validated, don't need to check the value
 	default:
 		panic(fmt.Sprintf("unexpected type %T", t))
@@ -100,7 +100,7 @@ func validateSelections(ctx context.Context, sels []selected.Selection, path *pa
 	return errs
 }
 
-func validateList(ctx context.Context, sels []selected.Selection, typ *types.List, path *pathSegment, s *resolvable.Schema) []*errors.QueryError {
+func validateList(ctx context.Context, sels []selected.Selection, typ *ast.List, path *pathSegment, s *resolvable.Schema) []*errors.QueryError {
 	// For lists, we only need to apply validation once. Nothing has been evaluated, so we have no list, and need to use '0' as the path index
 	return validateSelectionSet(ctx, sels, typ.OfType, &pathSegment{path, 0}, s)
 }