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node_modules/stylelint/lib/rules/selector-no-combinator/README.md

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+# selector-no-combinator
+
+Disallow combinators in selectors.
+
+```css
+  a > b + c ~ d e { color: pink; }
+/** ↑   ↑   ↑  ↑
+ * These are combinators */
+```
+
+Combinators are used to combine several different selectors into new and more specific ones. There are several types of combinators, including: child (`>`), adjacent sibling (`+`), general sibling (`~`), and descendant (which is represented by a blank space between two selectors).
+
+## Options
+
+### `true`
+
+The following patterns are considered warnings:
+
+```css
+a b { color: pink; }
+```
+
+```css
+a > b { color: pink; }
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a { color: pink; }
+```
+
+```css
+a, b { color: pink; }
+```
+
+```css
+a.foo { color: pink; }
+```

node_modules/stylelint/lib/rules/selector-no-combinator/index.js

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+"use strict"
+
+const isStandardSyntaxRule = require("../../utils/isStandardSyntaxRule")
+const isStandardSyntaxSelector = require("../../utils/isStandardSyntaxSelector")
+const parseSelector = require("../../utils/parseSelector")
+const report = require("../../utils/report")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+
+const ruleName = "selector-no-combinator"
+
+const messages = ruleMessages(ruleName, {
+  rejected: "Unexpected combinator",
+})
+
+const rule = function (actual) {
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, { actual })
+    if (!validOptions) {
+      return
+    }
+
+    root.walkRules(rule => {
+      if (!isStandardSyntaxRule(rule)) {
+        return
+      }
+      const selector = rule.selector
+
+      if (!isStandardSyntaxSelector(selector)) {
+        return
+      }
+      parseSelector(selector, result, rule, selectorAST => {
+        selectorAST.walkCombinators(combinator => {
+          report({
+            message: messages.rejected,
+            node: rule,
+            index: combinator.sourceIndex,
+            ruleName,
+            result,
+          })
+        })
+      })
+    })
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule