--- /dev/null
+"use strict";
+
+const isStandardSyntaxRule = require("../../utils/isStandardSyntaxRule");
+const parseSelector = require("../../utils/parseSelector");
+const punctuationSets = require("../../reference/punctuationSets");
+const report = require("../../utils/report");
+const ruleMessages = require("../../utils/ruleMessages");
+const validateOptions = require("../../utils/validateOptions");
+
+const ruleName = "selector-descendant-combinator-no-non-space";
+
+const messages = ruleMessages(ruleName, {
+ rejected: nonSpaceCharacter => `Unexpected "${nonSpaceCharacter}"`
+});
+
+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;
+
+ parseSelector(selector, result, rule, fullSelector => {
+ fullSelector.walkCombinators(combinatorNode => {
+ const value = combinatorNode.value;
+
+ if (punctuationSets.nonSpaceCombinators.has(value)) {
+ return;
+ }
+ if (value === " ") {
+ return;
+ }
+
+ report({
+ result,
+ ruleName,
+ message: messages.rejected(value),
+ node: rule,
+ index: combinatorNode.sourceIndex
+ });
+ });
+ });
+ });
+ };
+};
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+module.exports = rule;