Disallow old style octal literals in enums

Author: arusakov

src/compiler/checker.ts

@@ -18582,6 +18582,7 @@ namespace ts {
                             }
                             return undefined;
                         case SyntaxKind.NumericLiteral:
+                            checkGrammarNumericLiteral(<NumericLiteral>e);
                             return +(<NumericLiteral>e).text;
                         case SyntaxKind.ParenthesizedExpression:
                             return evalConstant((<ParenthesizedExpression>e).expression);
@@ -21885,9 +21886,12 @@ namespace ts {
                 if (languageVersion >= ScriptTarget.ES5) {
                     diagnosticMessage = Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0;
                 }
-                else if (isChildOfLiteralType(node)) {
+                else if (isChildOfNodeWithKind(node, SyntaxKind.LiteralType)) {
                     diagnosticMessage = Diagnostics.Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0;
                 }
+                else if (isChildOfNodeWithKind(node, SyntaxKind.EnumMember)) {
+                    diagnosticMessage = Diagnostics.Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0;
+                }
                 if (diagnosticMessage) {
                     const withMinus = isPrefixUnaryExpression(node.parent) && node.parent.operator === SyntaxKind.MinusToken;
                     const literal = `${withMinus ? "-" : ""}0o${node.text}`;

src/compiler/diagnosticMessages.json

@@ -3246,5 +3246,9 @@
     "Octal literal types must use ES2015 syntax. Use the syntax '{0}'.": {
         "category": "Error",
         "code": 8017
+    },
+    "Octal literals are not allowed in enums members initializer. Use the syntax '{0}'.": {
+        "category": "Error",
+        "code": 8018
     }
 }

src/compiler/utilities.ts

@@ -732,9 +732,9 @@ namespace ts {
         return false;
     }
 
-    export function isChildOfLiteralType(node: Node): boolean {
+    export function isChildOfNodeWithKind(node: Node, kind: SyntaxKind): boolean {
         while (node) {
-            if (node.kind === SyntaxKind.LiteralType) {
+            if (node.kind === kind) {
                 return true;
             }
             node = node.parent;

tests/baselines/reference/es3-oldStyleOctalLiteralInEnums.errors.txt

@@ -0,0 +1,13 @@
+tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts(2,7): error TS8018: Octal literals are not allowed in enums members initializer. Use the syntax '-0o1'.
+tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts(3,7): error TS8018: Octal literals are not allowed in enums members initializer. Use the syntax '0o2'.
+
+
+==== tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts (2 errors) ====
+    enum E {
+      x = -01,
+          ~~~
+!!! error TS8018: Octal literals are not allowed in enums members initializer. Use the syntax '-0o1'.
+      y = 02,
+          ~~
+!!! error TS8018: Octal literals are not allowed in enums members initializer. Use the syntax '0o2'.
+    }

tests/baselines/reference/es3-oldStyleOctalLiteralInEnums.js

@@ -0,0 +1,12 @@
+//// [es3-oldStyleOctalLiteralInEnums.ts]
+enum E {
+  x = -01,
+  y = 02,
+}
+
+//// [es3-oldStyleOctalLiteralInEnums.js]
+var E;
+(function (E) {
+    E[E["x"] = -1] = "x";
+    E[E["y"] = 2] = "y";
+})(E || (E = {}));

tests/baselines/reference/es3-oldStyleOctalLiteralTypes.errors.txt

@@ -0,0 +1,12 @@
+tests/cases/compiler/es3-oldStyleOctalLiteralTypes.ts(1,8): error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '0o10'.
+tests/cases/compiler/es3-oldStyleOctalLiteralTypes.ts(2,8): error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '-0o20'.
+
+
+==== tests/cases/compiler/es3-oldStyleOctalLiteralTypes.ts (2 errors) ====
+    let x: 010;
+           ~~~
+!!! error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '0o10'.
+    let y: -020;
+           ~~~~
+!!! error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '-0o20'.
+    

tests/baselines/reference/es3-oldStyleOctalLiteralTypes.js

@@ -0,0 +1,8 @@
+//// [es3-oldStyleOctalLiteralTypes.ts]
+let x: 010;
+let y: -020;
+
+
+//// [es3-oldStyleOctalLiteralTypes.js]
+var x;
+var y;

tests/baselines/reference/es5-oldStyleOctalLiteralInEnums.errors.txt

@@ -0,0 +1,13 @@
+tests/cases/compiler/es5-oldStyleOctalLiteralInEnums.ts(2,7): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
+tests/cases/compiler/es5-oldStyleOctalLiteralInEnums.ts(3,7): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o2'.
+
+
+==== tests/cases/compiler/es5-oldStyleOctalLiteralInEnums.ts (2 errors) ====
+    enum E {
+      x = -01,
+          ~~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
+      y = 02,
+          ~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o2'.
+    }

tests/baselines/reference/es5-oldStyleOctalLiteralInEnums.js

@@ -0,0 +1,12 @@
+//// [es5-oldStyleOctalLiteralInEnums.ts]
+enum E {
+  x = -01,
+  y = 02,
+}
+
+//// [es5-oldStyleOctalLiteralInEnums.js]
+var E;
+(function (E) {
+    E[E["x"] = -1] = "x";
+    E[E["y"] = 2] = "y";
+})(E || (E = {}));

tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts

@@ -0,0 +1,5 @@
+// @target: ES3
+enum E {
+  x = -01,
+  y = 02,
+}