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app_vue/node_modules/eslint-plugin-vue/lib/rules/v-for-delimiter-style.js

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+/**
+ * @fileoverview enforce `v-for` directive's delimiter style
+ * @author Flo Edelmann
+ * @copyright 2020 Flo Edelmann. All rights reserved.
+ * See LICENSE file in root directory for full license.
+ */
+'use strict'
+
+// ------------------------------------------------------------------------------
+// Requirements
+// ------------------------------------------------------------------------------
+
+const utils = require('../utils')
+
+// ------------------------------------------------------------------------------
+// Rule Definition
+// ------------------------------------------------------------------------------
+
+module.exports = {
+  meta: {
+    type: 'layout',
+    docs: {
+      description: "enforce `v-for` directive's delimiter style",
+      categories: undefined,
+      recommended: false,
+      url: 'https://eslint.vuejs.org/rules/v-for-delimiter-style.html'
+    },
+    fixable: 'code',
+    schema: [{ enum: ['in', 'of'] }]
+  },
+  /** @param {RuleContext} context */
+  create(context) {
+    const preferredDelimiter =
+      /** @type {string|undefined} */ (context.options[0]) || 'in'
+
+    return utils.defineTemplateBodyVisitor(context, {
+      /** @param {VForExpression} node */
+      VForExpression(node) {
+        const tokenStore =
+          context.parserServices.getTemplateBodyTokenStore &&
+          context.parserServices.getTemplateBodyTokenStore()
+
+        const delimiterToken = /** @type {Token} */ (
+          tokenStore.getTokenAfter(
+            node.left.length
+              ? node.left[node.left.length - 1]
+              : tokenStore.getFirstToken(node),
+            (token) => token.type !== 'Punctuator' || token.value !== ')'
+          )
+        )
+
+        if (delimiterToken.value === preferredDelimiter) {
+          return
+        }
+
+        context.report({
+          node,
+          loc: node.loc,
+          message: `Expected '{{preferredDelimiter}}' instead of '{{usedDelimiter}}' in 'v-for'.`,
+          data: {
+            preferredDelimiter,
+            usedDelimiter: delimiterToken.value
+          },
+          *fix(fixer) {
+            yield fixer.replaceText(delimiterToken, preferredDelimiter)
+          }
+        })
+      }
+    })
+  }
+}