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app_vue/node_modules/eslint/lib/rules/no-tabs.js

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+/**
+ * @fileoverview Rule to check for tabs inside a file
+ * @author Gyandeep Singh
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+const tabRegex = /\t+/gu;
+const anyNonWhitespaceRegex = /\S/u;
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "layout",
+
+        docs: {
+            description: "disallow all tabs",
+            category: "Stylistic Issues",
+            recommended: false,
+            url: "https://eslint.org/docs/rules/no-tabs"
+        },
+        schema: [{
+            type: "object",
+            properties: {
+                allowIndentationTabs: {
+                    type: "boolean",
+                    default: false
+                }
+            },
+            additionalProperties: false
+        }],
+
+        messages: {
+            unexpectedTab: "Unexpected tab character."
+        }
+    },
+
+    create(context) {
+        const sourceCode = context.getSourceCode();
+        const allowIndentationTabs = context.options && context.options[0] && context.options[0].allowIndentationTabs;
+
+        return {
+            Program(node) {
+                sourceCode.getLines().forEach((line, index) => {
+                    let match;
+
+                    while ((match = tabRegex.exec(line)) !== null) {
+                        if (allowIndentationTabs && !anyNonWhitespaceRegex.test(line.slice(0, match.index))) {
+                            continue;
+                        }
+
+                        context.report({
+                            node,
+                            loc: {
+                                start: {
+                                    line: index + 1,
+                                    column: match.index
+                                },
+                                end: {
+                                    line: index + 1,
+                                    column: match.index + match[0].length
+                                }
+                            },
+                            messageId: "unexpectedTab"
+                        });
+                    }
+                });
+            }
+        };
+    }
+};