Fixes to valueToLiteral

Author: leebyron

src/type/definition.d.ts

@@ -23,6 +23,7 @@ import {
   FieldNode,
   FragmentDefinitionNode,
   ValueNode,
+  ConstValueNode,
   ScalarTypeExtensionNode,
   UnionTypeExtensionNode,
   EnumTypeExtensionNode,
@@ -316,6 +317,7 @@ export class GraphQLScalarType {
   serialize: GraphQLScalarSerializer<unknown>;
   parseValue: GraphQLScalarValueParser<unknown>;
   parseLiteral: GraphQLScalarLiteralParser<unknown>;
+  valueToLiteral: Maybe<GraphQLScalarValueToLiteral>;
   extensions: Maybe<Readonly<GraphQLScalarTypeExtensions>>;
   astNode: Maybe<ScalarTypeDefinitionNode>;
   extensionASTNodes: ReadonlyArray<ScalarTypeExtensionNode>;
@@ -327,6 +329,7 @@ export class GraphQLScalarType {
     serialize: GraphQLScalarSerializer<unknown>;
     parseValue: GraphQLScalarValueParser<unknown>;
     parseLiteral: GraphQLScalarLiteralParser<unknown>;
+    valueToLiteral: Maybe<GraphQLScalarValueToLiteral>;
     extensions: Maybe<Readonly<GraphQLScalarTypeExtensions>>;
     extensionASTNodes: ReadonlyArray<ScalarTypeExtensionNode>;
   };
@@ -347,6 +350,10 @@ export type GraphQLScalarLiteralParser<TInternal> = (
   variables: Maybe<ObjMap<unknown>>,
 ) => Maybe<TInternal>;
 
+export type GraphQLScalarValueToLiteral = (
+  inputValue: unknown,
+) => Maybe<ConstValueNode>;
+
 export interface GraphQLScalarTypeConfig<TInternal, TExternal> {
   name: string;
   description?: Maybe<string>;
@@ -357,6 +364,8 @@ export interface GraphQLScalarTypeConfig<TInternal, TExternal> {
   parseValue?: GraphQLScalarValueParser<TInternal>;
   // Parses an externally provided literal value to use as an input.
   parseLiteral?: GraphQLScalarLiteralParser<TInternal>;
+  // Translates an external input value to an external literal (AST).
+  valueToLiteral?: Maybe<GraphQLScalarValueToLiteral>;
   extensions?: Maybe<Readonly<GraphQLScalarTypeExtensions>>;
   astNode?: Maybe<ScalarTypeDefinitionNode>;
   extensionASTNodes?: Maybe<ReadonlyArray<ScalarTypeExtensionNode>>;
@@ -786,6 +795,7 @@ export class GraphQLEnumType {
     valueNode: ValueNode,
     _variables: Maybe<ObjMap<unknown>>,
   ): Maybe<any>;
+  valueToLiteral(value: unknown): Maybe<ConstValueNode>;
 
   toConfig(): GraphQLEnumTypeConfig & {
     extensions: Maybe<Readonly<GraphQLEnumTypeExtensions>>;

src/type/definition.js

@@ -42,6 +42,7 @@ import type {
   FieldNode,
   FragmentDefinitionNode,
   ValueNode,
+  ConstValueNode,
 } from '../language/ast';
 
 import { valueFromASTUntyped } from '../utilities/valueFromASTUntyped';
@@ -647,7 +648,9 @@ export type GraphQLScalarLiteralParser<TInternal> = (
   variables: ?ObjMap<mixed>,
 ) => ?TInternal;
 
-export type GraphQLScalarValueToLiteral = (inputValue: mixed) => ?ValueNode;
+export type GraphQLScalarValueToLiteral = (
+  inputValue: mixed,
+) => ?ConstValueNode;
 
 export type GraphQLScalarTypeConfig<TInternal, TExternal> = {|
   name: string,
@@ -846,10 +849,7 @@ export function defineArguments(
     name: argName,
     description: argConfig.description,
     type: argConfig.type,
-    defaultValue: uncoerceDefaultValue(
-      argConfig.defaultValue,
-      argConfig.type,
-    ),
+    defaultValue: uncoerceDefaultValue(argConfig.defaultValue, argConfig.type),
     deprecationReason: argConfig.deprecationReason,
     extensions: argConfig.extensions && toObjMap(argConfig.extensions),
     astNode: argConfig.astNode,
@@ -1354,7 +1354,7 @@ export class GraphQLEnumType /* <T> */ {
     return enumValue.value;
   }
 
-  valueToLiteral(value: mixed): ?ValueNode {
+  valueToLiteral(value: mixed): ?ConstValueNode {
     if (typeof value === 'string') {
       // https://spec.graphql.org/draft/#Name
       if (/^[_a-zA-Z][_a-zA-Z0-9]*$/.test(value)) {

src/type/scalars.js

@@ -1,7 +1,7 @@
 import { inspect } from '../jsutils/inspect';
 import { isObjectLike } from '../jsutils/isObjectLike';
 
-import type { ValueNode } from '../language/ast';
+import type { ConstValueNode } from '../language/ast';
 import { Kind } from '../language/kinds';
 import { print } from '../language/printer';
 
@@ -269,7 +269,7 @@ export const GraphQLID: GraphQLScalarType = new GraphQLScalarType({
     }
     return valueNode.value;
   },
-  valueToLiteral(value: mixed): ?ValueNode {
+  valueToLiteral(value: mixed): ?ConstValueNode {
     // ID types can use Int literals.
     if (typeof value === 'string') {
       if (/^-?(?:0|[1-9][0-9]*)$/.test(value)) {

src/utilities/valueToLiteral.d.ts

@@ -1,4 +1,4 @@
-import { ValueNode } from '../language/ast';
+import { ConstValueNode } from '../language/ast';
 import { GraphQLInputType } from '../type/definition';
 
 /**
@@ -25,4 +25,4 @@ import { GraphQLInputType } from '../type/definition';
 export function valueToLiteral(
   value: unknown,
   type?: GraphQLInputType,
-): ValueNode;
+): ConstValueNode;

src/utilities/valueToLiteral.js

@@ -1,7 +1,7 @@
 import { inspect } from '../jsutils/inspect';
 import { isIterableObject } from '../jsutils/isIterableObject';
 
-import type { ValueNode } from '../language/ast';
+import type { ConstValueNode } from '../language/ast';
 import { Kind } from '../language/kinds';
 
 import type { GraphQLInputType } from '../type/definition';
@@ -35,7 +35,7 @@ import {
 export function valueToLiteral(
   value: mixed,
   type?: GraphQLInputType,
-): ValueNode {
+): ConstValueNode {
   // Like JSON, a null literal is produced for null and undefined.
   if (value == null) {
     return { kind: Kind.NULL };