From 24d6a7bb7007a847086dcb57c31338612a682e75 Mon Sep 17 00:00:00 2001
From: Ivan Goncharov <ivan.goncharov.ua@gmail.com>
Date: Sun, 23 May 2021 23:32:38 +0300
Subject: [PATCH] TypeInfo: use explicit type for `getFieldDef` arg

---
 src/utilities/TypeInfo.d.ts |  4 ++--
 src/utilities/TypeInfo.js   | 10 ++++++++--
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/utilities/TypeInfo.d.ts b/src/utilities/TypeInfo.d.ts
index 929e9679cd..3f6fda00fa 100644
--- a/src/utilities/TypeInfo.d.ts
+++ b/src/utilities/TypeInfo.d.ts
@@ -26,7 +26,7 @@ export class TypeInfo {
      */
     initialType?: GraphQLType,
     /** @deprecated will be removed in 17.0.0 */
-    getFieldDefFn?: getFieldDef,
+    getFieldDefFn?: GetFieldDefFn,
   );
   getType(): Maybe<GraphQLOutputType>;
   getParentType(): Maybe<GraphQLCompositeType>;
@@ -40,7 +40,7 @@ export class TypeInfo {
   enter(node: ASTNode): any;
   leave(node: ASTNode): any;
 }
-type getFieldDef = (
+type GetFieldDefFn = (
   schema: GraphQLSchema,
   parentType: GraphQLType,
   fieldNode: FieldNode,
diff --git a/src/utilities/TypeInfo.js b/src/utilities/TypeInfo.js
index 223ad8d920..05af99d0f6 100644
--- a/src/utilities/TypeInfo.js
+++ b/src/utilities/TypeInfo.js
@@ -51,7 +51,7 @@ export class TypeInfo {
   _directive: ?GraphQLDirective;
   _argument: ?GraphQLArgument;
   _enumValue: ?GraphQLEnumValue;
-  _getFieldDef: typeof getFieldDef;
+  _getFieldDef: GetFieldDefFn;
 
   constructor(
     schema: GraphQLSchema,
@@ -62,7 +62,7 @@ export class TypeInfo {
     initialType?: ?GraphQLType,
 
     /** @deprecated will be removed in 17.0.0 */
-    getFieldDefFn?: typeof getFieldDef,
+    getFieldDefFn?: GetFieldDefFn,
   ) {
     this._schema = schema;
     this._typeStack = [];
@@ -292,6 +292,12 @@ export class TypeInfo {
   }
 }
 
+type GetFieldDefFn = (
+  schema: GraphQLSchema,
+  parentType: GraphQLType,
+  fieldNode: FieldNode,
+) => ?GraphQLField<mixed, mixed>;
+
 /**
  * Not exactly the same as the executor's definition of getFieldDef, in this
  * statically evaluated environment we do not always have an Object type,