Disallow old style octal literal types

src/compiler/checker.ts

@@ -21845,8 +21845,13 @@ namespace ts {
 
         function checkGrammarNumericLiteral(node: NumericLiteral): boolean {
             // Grammar checking
-            if (node.isOctalLiteral && languageVersion >= ScriptTarget.ES5) {
-                return grammarErrorOnNode(node, Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
+            if (node.isOctalLiteral) {
+                if (languageVersion >= ScriptTarget.ES5) {
+                    return grammarErrorOnNode(node, Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0o_0, node.text);
+                }
+                if (isChildOfLiteralType(node)) {
+                    return grammarErrorOnNode(node, Diagnostics.Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0o_0, node.text);
+                }
             }
         }
 

src/compiler/diagnosticMessages.json

@@ -227,7 +227,7 @@
         "category": "Error",
         "code": 1084
     },
-    "Octal literals are not available when targeting ECMAScript 5 and higher.": {
+    "Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o{0}'.": {
         "category": "Error",
         "code": 1085
     },
@@ -3234,5 +3234,9 @@
     "Add {0} to existing import declaration from {1}": {
         "category": "Message",
         "code": 90015
+    },
+    "Octal literal types must use ES2015 syntax. Use the syntax '0o{0}'.": {
+        "category": "Error",
+        "code": 8017
     }
 }

src/compiler/utilities.ts

@@ -732,6 +732,16 @@ namespace ts {
         return false;
     }
 
+    export function isChildOfLiteralType(node: Node): boolean {
+        while (node) {
+            if (node.kind === SyntaxKind.LiteralType) {
+                return true;
+            }
+            node = node.parent;
+        }
+        return false;
+    }
+
     // Warning: This has the same semantics as the forEach family of functions,
     //          in that traversal terminates in the event that 'visitor' supplies a truthy value.
     export function forEachReturnStatement<T>(body: Block, visitor: (stmt: ReturnStatement) => T): T {

tests/baselines/reference/literals.errors.txt

@@ -2,8 +2,8 @@ tests/cases/conformance/expressions/literals/literals.ts(9,10): error TS2362: Th
 tests/cases/conformance/expressions/literals/literals.ts(9,17): error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 tests/cases/conformance/expressions/literals/literals.ts(10,9): error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 tests/cases/conformance/expressions/literals/literals.ts(10,21): error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
-tests/cases/conformance/expressions/literals/literals.ts(20,9): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/literals/literals.ts(25,10): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
+tests/cases/conformance/expressions/literals/literals.ts(20,9): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
+tests/cases/conformance/expressions/literals/literals.ts(25,10): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o3'.
 
 
 ==== tests/cases/conformance/expressions/literals/literals.ts (6 errors) ====
@@ -36,14 +36,14 @@ tests/cases/conformance/expressions/literals/literals.ts(25,10): error TS1085: O
     var n = 1e4;
     var n = 001; // Error in ES5
             ~~~
-!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
     var n = 0x1;
     var n = -1;
     var n = -1.0;
     var n = -1e-4;
     var n = -003; // Error in ES5
              ~~~
-!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o3'.
     var n = -0x1;
     
     var s: string;

tests/baselines/reference/objectLiteralErrors.errors.txt

@@ -12,7 +12,7 @@ tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(13,21)
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(14,19): error TS2300: Duplicate identifier '0'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(15,19): error TS2300: Duplicate identifier '0'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(16,19): error TS2300: Duplicate identifier '0x0'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(17,19): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
+tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(17,19): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o0'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(17,19): error TS2300: Duplicate identifier '000'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(18,23): error TS2300: Duplicate identifier '1e2'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(19,22): error TS2300: Duplicate identifier '3.2e1'.
@@ -125,7 +125,7 @@ tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(45,55)
 !!! error TS2300: Duplicate identifier '0x0'.
     var e14 = { 0: 0, 000: 0 };
                       ~~~
-!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o0'.
                       ~~~
 !!! error TS2300: Duplicate identifier '000'.
     var e15 = { "100": 0, 1e2: 0 };

tests/baselines/reference/oldStyleOctalLiteralTypes.errors.txt

@@ -0,0 +1,12 @@
+tests/cases/compiler/oldStyleOctalLiteralTypes.ts(1,8): error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '0o10'.
+tests/cases/compiler/oldStyleOctalLiteralTypes.ts(2,9): error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '0o20'.
+
+
+==== tests/cases/compiler/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/oldStyleOctalLiteralTypes.js

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

tests/baselines/reference/scannerNumericLiteral2.errors.txt

@@ -1,7 +1,7 @@
-tests/cases/conformance/scanner/ecmascript5/scannerNumericLiteral2.ts(1,1): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
+tests/cases/conformance/scanner/ecmascript5/scannerNumericLiteral2.ts(1,1): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
 
 
 ==== tests/cases/conformance/scanner/ecmascript5/scannerNumericLiteral2.ts (1 errors) ====
     01
     ~~
-!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.

tests/baselines/reference/scannerNumericLiteral8.errors.txt

@@ -1,7 +1,7 @@
-tests/cases/conformance/scanner/ecmascript5/scannerNumericLiteral8.ts(1,2): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
+tests/cases/conformance/scanner/ecmascript5/scannerNumericLiteral8.ts(1,2): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o3'.
 
 
 ==== tests/cases/conformance/scanner/ecmascript5/scannerNumericLiteral8.ts (1 errors) ====
     -03
      ~~
-!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o3'.

tests/cases/compiler/oldStyleOctalLiteralTypes.ts

@@ -0,0 +1,3 @@
+// @target: ES3
+let x: 010;
+let y: -020;