Revert "optimize: ensure with new fix that we avoid checking back too far"

This reverts commit e13a03a.

Author: brettz9

README.md

@@ -10565,13 +10565,6 @@ export class User {
 }
 // Options: [{"contexts":["ClassProperty:has(Decorator[expression.callee.name=\"Input\"])"]}]
 // Message: Missing JSDoc comment.
-
-@Input()
-export class UserSettingsState {
-  method () {}
-}
-// Options: [{"require":{"MethodDefinition":true}}]
-// Message: Missing JSDoc comment.
 ````
 
 The following patterns are not considered problems:

src/eslint/getJSDocComment.js

@@ -16,29 +16,23 @@ const isCommentToken = (token) => {
 
 const decoratorMetaTokens = new Map([[')', '('], ['>', '<']]);
 
-// eslint-disable-next-line complexity
 const getDecorator = (token, sourceCode) => {
   if (!token) {
     return false;
   }
-
   if (token.type === 'Punctuator') {
     const tokenClose = token.value;
     const tokenOpen = decoratorMetaTokens.get(tokenClose);
     if (tokenOpen) {
       let nested = 0;
       let tokenBefore = token;
-      let exitEarlyUnlessTyped = false;
       do {
         tokenBefore = sourceCode.getTokenBefore(tokenBefore, {includeComments: true});
         // istanbul ignore if
         if (tokenBefore && tokenBefore.type === 'Punctuator') {
           if (tokenBefore.value === tokenClose) {
             nested++;
           } else if (tokenBefore.value === tokenOpen) {
-            if (tokenOpen === '(') {
-              exitEarlyUnlessTyped = true;
-            }
             if (nested) {
               nested--;
             } else {
@@ -48,33 +42,7 @@ const getDecorator = (token, sourceCode) => {
         }
       } while (tokenBefore);
 
-      // Because our token retrieval doesn't give us as much info as AST, and
-      //  because decorators can be nested and fairly complex, besides finding
-      //  any decorators, we also want to avoid checking backwards indefinitely
-      //  in a potentially large document, so we exit early if parentheses are
-      //  not preceded by a type where we have to keep checking backward for
-      //  now (such as a regular call expression) or if a decorator is found.
-      if (exitEarlyUnlessTyped) {
-        // Check for `@someDecorator(`
-        const identifier = sourceCode.getTokenBefore(tokenBefore, {includeComments: true});
-        if (identifier && identifier.type === 'Identifier') {
-          const before = sourceCode.getTokenBefore(identifier, {includeComments: true});
-          if (before && before.type === 'Punctuator' && before.value === '@') {
-            // Decorator found
-            return before;
-          }
-        }
-
-        // If decorators may have `:`, we might need to check for those as with typed.
-        if (!identifier || identifier.type !== 'Punctuator' || identifier.value !== '>') {
-          // Should not be a decorator
-          return false;
-        }
-
-        // Could be a typed decorator, so keep checking for one
-      }
-
-      return getDecorator(tokenBefore, sourceCode, true);
+      return getDecorator(tokenBefore, sourceCode);
     }
     if (token.value === '@') {
       return token;

test/rules/assertions/requireJsdoc.js

@@ -2763,35 +2763,6 @@ function quux (foo) {
       `,
       parser: require.resolve('@typescript-eslint/parser'),
     },
-    {
-      code: `
-      @Input()
-      export class UserSettingsState {
-        method () {}
-      }
-      `,
-      errors: [
-        {
-          line: 4,
-          message: 'Missing JSDoc comment.',
-        },
-      ],
-      options: [{
-        require: {
-          MethodDefinition: true,
-        },
-      }],
-      output: `
-      /**
-       *
-       */
-      @Input()
-      export class UserSettingsState {
-        method () {}
-      }
-      `,
-      parser: require.resolve('@typescript-eslint/parser'),
-    },
   ],
   valid: [{
     code: `