1 files changed, 64 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/lib/rules/no-floating-decimal.js b/tools/node_modules/eslint/lib/rules/no-floating-decimal.js
new file mode 100644
index 0000000000..dfba453a49
--- /dev/null
+++ b/tools/node_modules/eslint/lib/rules/no-floating-decimal.js
@@ -0,0 +1,64 @@
+/**
+ * @fileoverview Rule to flag use of a leading/trailing decimal point in a numeric literal
+ * @author James Allardice
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const astUtils = require("../ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "disallow leading or trailing decimal points in numeric literals",
+            category: "Best Practices",
+            recommended: false
+        },
+
+        schema: [],
+
+        fixable: "code"
+    },
+
+    create(context) {
+        const sourceCode = context.getSourceCode();
+
+        return {
+            Literal(node) {
+
+                if (typeof node.value === "number") {
+                    if (node.raw.startsWith(".")) {
+                        context.report({
+                            node,
+                            message: "A leading decimal point can be confused with a dot.",
+                            fix(fixer) {
+                                const tokenBefore = sourceCode.getTokenBefore(node);
+                                const needsSpaceBefore = tokenBefore &&
+                                    tokenBefore.range[1] === node.range[0] &&
+                                    !astUtils.canTokensBeAdjacent(tokenBefore, `0${node.raw}`);
+
+                                return fixer.insertTextBefore(node, needsSpaceBefore ? " 0" : "0");
+                            }
+                        });
+                    }
+                    if (node.raw.indexOf(".") === node.raw.length - 1) {
+                        context.report({
+                            node,
+                            message: "A trailing decimal point can be confused with a dot.",
+                            fix: fixer => fixer.insertTextAfter(node, "0")
+                        });
+                    }
+                }
+            }
+        };
+
+    }
+};