minor refactor

Author: ota-meshi

lib/utils/fix-sort-elements.ts

@@ -11,27 +11,6 @@ import type { Rule, AST as ESLintAST, SourceCode } from "eslint";
 import type { AST } from "jsonc-eslint-parser";
 import type * as ESTree from "estree";
 
-/**
- * Check if the token is a comma.
- */
-function isComma(token: ESLintAST.Token): boolean {
-  return isCommaToken(token);
-}
-
-/**
- * Check if the token is a closing brace.
- */
-function isClosingBrace(token: ESLintAST.Token): boolean {
-  return isClosingBraceToken(token);
-}
-
-/**
- * Check if the token is a closing bracket.
- */
-function isClosingBracket(token: ESLintAST.Token): boolean {
-  return isClosingBracketToken(token);
-}
-
 export type AroundTarget =
   | {
       before: ESLintAST.Token;
@@ -201,7 +180,7 @@ function getElementEndInfo(
   }
   const comma = afterToken;
   const nextElement = sourceCode.getTokenAfter(afterToken)!;
-  if (isComma(nextElement)) {
+  if (isCommaToken(nextElement)) {
     // If the next element is empty,
     // the position of the comma is the end of the element's range.
     return {
@@ -210,7 +189,7 @@ function getElementEndInfo(
       last: comma,
     };
   }
-  if (isClosingBrace(nextElement) || isClosingBracket(nextElement)) {
+  if (isClosingBraceToken(nextElement) || isClosingBracketToken(nextElement)) {
     // If the next token is a closing brace or bracket,
     // the position of the comma is the end of the element's range.
     return {
@@ -274,7 +253,7 @@ function getLastTokenWithTrailingComments(
     (after = sourceCode.getTokenAfter(last, {
       includeComments: true,
     })) &&
-    (isCommentToken(after) || isComma(after)) &&
+    (isCommentToken(after) || isCommaToken(after)) &&
     node.loc.end.line === after.loc!.end.line
   ) {
     last = after;
@@ -310,7 +289,7 @@ function getPrevElementInfo(
   const comma = beforeToken;
   const prevElement = sourceCode.getTokenBefore(beforeToken)!;
 
-  if (isComma(prevElement)) {
+  if (isCommaToken(prevElement)) {
     // If the previous element is empty,
     // the position of the comma is the end of the previous element's range.
     return {

typings/@eslint-community/eslint-utils/index.d.ts

@@ -1,24 +1,25 @@
 import type { Comment } from "estree";
 import type { AST, SourceCode } from "eslint";
 
-type IsToken = (token: AST.Token | Comment) => token is AST.Token;
+type IsToken<V extends string> = (
+  token: AST.Token | Comment,
+) => token is AST.Token & { value: V };
 type IsNotToken = (token: AST.Token | Comment) => boolean;
 
 declare module "@eslint-community/eslint-utils" {
   export const findVariable: unknown;
-  export const getFunctionHeadLocation: IsToken;
-  export const getFunctionNameWithKind: IsToken;
-  export const getInnermostScope: IsToken;
-  export const getPropertyName: IsToken;
-  export const getStaticValue: IsToken;
-  export const getStringIfConstant: IsToken;
-  export const hasSideEffect: IsToken;
-  export const isArrowToken: IsToken;
-  export const isClosingBraceToken: IsToken;
-  export const isClosingBracketToken: IsToken;
-  export const isClosingParenToken: IsToken;
-  export const isColonToken: IsToken;
-  export const isCommaToken: IsToken;
+  export const getFunctionHeadLocation: unknown;
+  export const getFunctionNameWithKind: unknown;
+  export const getInnermostScope: unknown;
+  export const getPropertyName: unknown;
+  export const getStaticValue: unknown;
+  export const getStringIfConstant: unknown;
+  export const hasSideEffect: unknown;
+  export const isClosingBraceToken: IsToken<"}">;
+  export const isClosingBracketToken: IsToken<"]">;
+  export const isClosingParenToken: IsToken<")">;
+  export const isColonToken: IsToken<";">;
+  export const isCommaToken: IsToken<",">;
   export const isCommentToken: (token: AST.Token | Comment) => token is Comment;
   export const isNotArrowToken: IsNotToken;
   export const isNotClosingBraceToken: IsNotToken;
@@ -31,9 +32,9 @@ declare module "@eslint-community/eslint-utils" {
   export const isNotOpeningBracketToken: IsNotToken;
   export const isNotOpeningParenToken: IsNotToken;
   export const isNotSemicolonToken: IsNotToken;
-  export const isOpeningBraceToken: IsToken;
-  export const isOpeningBracketToken: IsToken;
-  export const isOpeningParenToken: IsToken;
+  export const isOpeningBraceToken: IsToken<"{">;
+  export const isOpeningBracketToken: IsToken<"[">;
+  export const isOpeningParenToken: IsToken<"(">;
   export function isParenthesized(node: any, sourceCode: SourceCode): boolean;
   export function isParenthesized(
     times: number,