Move TokenKind into separate file to solve cycle import

src/language/__tests__/lexer-test.js

@@ -8,7 +8,8 @@ import dedent from '../../jsutils/dedent';
 import inspect from '../../jsutils/inspect';
 import { GraphQLError } from '../../error';
 import { Source } from '../source';
-import { createLexer, TokenKind, isPunctuatorToken } from '../lexer';
+import { TokenKind } from '../tokenKind';
+import { createLexer, isPunctuatorToken } from '../lexer';
 
 function lexOne(str) {
   const lexer = createLexer(new Source(str));

src/language/__tests__/parser-test.js

@@ -5,7 +5,7 @@ import { inspect as nodeInspect } from 'util';
 import { expect } from 'chai';
 import { describe, it } from 'mocha';
 import { Kind } from '../kinds';
-import { TokenKind } from '../lexer';
+import { TokenKind } from '../tokenKind';
 import { parse, parseValue, parseType } from '../parser';
 import { Source } from '../source';
 import dedent from '../../jsutils/dedent';

src/language/ast.js

@@ -1,7 +1,7 @@
 // @flow strict
 
 import { type Source } from './source';
-import { type TokenKindEnum } from './lexer';
+import { type TokenKindEnum } from './tokenKind';
 
 /**
  * Contains a range of UTF-8 character offsets and token references that

src/language/index.js

@@ -8,8 +8,11 @@ export type { SourceLocation } from './location';
 export { Kind } from './kinds';
 export type { KindEnum } from './kinds';
 
-export { createLexer, TokenKind } from './lexer';
-export type { Lexer, TokenKindEnum } from './lexer';
+export { TokenKind } from './tokenKind';
+export type { TokenKindEnum } from './tokenKind';
+
+export { createLexer } from './lexer';
+export type { Lexer } from './lexer';
 
 export { parse, parseValue, parseType } from './parser';
 export type { ParseOptions } from './parser';

src/language/lexer.js

@@ -3,6 +3,7 @@
 import defineToJSON from '../jsutils/defineToJSON';
 import { type Token } from './ast';
 import { type Source } from './source';
+import { type TokenKindEnum, TokenKind } from './tokenKind';
 import { syntaxError } from '../error/syntaxError';
 import { dedentBlockStringValue } from './blockString';
 
@@ -90,40 +91,6 @@ export type Lexer<TOptions> = {
   ...
 };
 
-/**
- * An exported enum describing the different kinds of tokens that the
- * lexer emits.
- */
-export const TokenKind = Object.freeze({
-  SOF: '<SOF>',
-  EOF: '<EOF>',
-  BANG: '!',
-  DOLLAR: '$',
-  AMP: '&',
-  PAREN_L: '(',
-  PAREN_R: ')',
-  SPREAD: '...',
-  COLON: ':',
-  EQUALS: '=',
-  AT: '@',
-  BRACKET_L: '[',
-  BRACKET_R: ']',
-  BRACE_L: '{',
-  PIPE: '|',
-  BRACE_R: '}',
-  NAME: 'Name',
-  INT: 'Int',
-  FLOAT: 'Float',
-  STRING: 'String',
-  BLOCK_STRING: 'BlockString',
-  COMMENT: 'Comment',
-});
-
-/**
- * The enum type representing the token kinds values.
- */
-export type TokenKindEnum = $Values<typeof TokenKind>;
-
 // @internal
 export function isPunctuatorToken(token: Token) {
   const kind = token.kind;

src/language/parser.js

@@ -5,13 +5,8 @@ import defineToJSON from '../jsutils/defineToJSON';
 import { Source } from './source';
 import { type GraphQLError } from '../error/GraphQLError';
 import { syntaxError } from '../error/syntaxError';
-import {
-  type Lexer,
-  type TokenKindEnum,
-  TokenKind,
-  getTokenDesc,
-  createLexer,
-} from './lexer';
+import { type TokenKindEnum, TokenKind } from './tokenKind';
+import { type Lexer, getTokenDesc, createLexer } from './lexer';
 import {
   type Location,
   type Token,

src/language/tokenKind.js

@@ -0,0 +1,35 @@
+// @flow strict
+
+/**
+ * An exported enum describing the different kinds of tokens that the
+ * lexer emits.
+ */
+export const TokenKind = Object.freeze({
+  SOF: '<SOF>',
+  EOF: '<EOF>',
+  BANG: '!',
+  DOLLAR: '$',
+  AMP: '&',
+  PAREN_L: '(',
+  PAREN_R: ')',
+  SPREAD: '...',
+  COLON: ':',
+  EQUALS: '=',
+  AT: '@',
+  BRACKET_L: '[',
+  BRACKET_R: ']',
+  BRACE_L: '{',
+  PIPE: '|',
+  BRACE_R: '}',
+  NAME: 'Name',
+  INT: 'Int',
+  FLOAT: 'Float',
+  STRING: 'String',
+  BLOCK_STRING: 'BlockString',
+  COMMENT: 'Comment',
+});
+
+/**
+ * The enum type representing the token kinds values.
+ */
+export type TokenKindEnum = $Values<typeof TokenKind>;

src/utilities/buildASTSchema.js

@@ -9,7 +9,7 @@ import { type ObjMap } from '../jsutils/ObjMap';
 import { valueFromAST } from './valueFromAST';
 import { assertValidSDL } from '../validation/validate';
 import { dedentBlockStringValue } from '../language/blockString';
-import { TokenKind } from '../language/lexer';
+import { TokenKind } from '../language/tokenKind';
 import { type ParseOptions, parse } from '../language/parser';
 import { type Source } from '../language/source';
 import { getDirectiveValues } from '../execution/values';

src/utilities/stripIgnoredCharacters.js

@@ -2,7 +2,8 @@
 
 import inspect from '../jsutils/inspect';
 import { Source } from '../language/source';
-import { createLexer, TokenKind, isPunctuatorToken } from '../language/lexer';
+import { TokenKind } from '../language/tokenKind';
+import { createLexer, isPunctuatorToken } from '../language/lexer';
 import {
   dedentBlockStringValue,
   getBlockStringIndentation,