Merge pull request #2691 from Microsoft/isRegExpWeHardlyKnewYe

Remove 'Symbol.isRegExp' and introduce 'RegExp.prototype.flags'
2026-06-27 04:48:33 -05:00 · 2015-04-10 01:51:59 -07:00
parent 6cc1091f3d 3d0655d088
commit ad477c7fc9
44 changed files with 156 additions and 140 deletions
--- a/src/lib/core.d.ts
+++ b/src/lib/core.d.ts
@@ -823,7 +823,7 @@ interface RegExp {
      */
    test(string: string): boolean;

-    /** Returns a copy of the text of the regular expression pattern. Read-only. The rgExp argument is a Regular expression object. It can be a variable name or a literal. */
+    /** Returns a copy of the text of the regular expression pattern. Read-only. The regExp argument is a Regular expression object. It can be a variable name or a literal. */
    source: string;

    /** Returns a Boolean value indicating the state of the global flag (g) used with a regular expression. Default is false. Read-only. */
--- a/src/lib/es6.d.ts
+++ b/src/lib/es6.d.ts
@@ -50,26 +50,21 @@ interface SymbolConstructor {
      */
    isConcatSpreadable: symbol;

-    /** 
-      * A Boolean value that if true indicates that an object may be used as a regular expression. 
-      */
-    isRegExp: symbol;
-
    /** 
      * A method that returns the default iterator for an object.Called by the semantics of the 
-      * for-of statement. 
+      * for-of statement.
      */
    iterator: symbol;

    /** 
      * A method that converts an object to a corresponding primitive value.Called by the ToPrimitive
-      * abstract operation. 
+      * abstract operation.
      */
    toPrimitive: symbol;

    /** 
-      * A String value that is used in the creation of the default string description of an object. 
-      * Called by the built- in method Object.prototype.toString. 
+      * A String value that is used in the creation of the default string description of an object.
+      * Called by the built-in method Object.prototype.toString.
      */
    toStringTag: symbol;

@@ -111,7 +106,7 @@ interface ObjectConstructor {
    getOwnPropertySymbols(o: any): symbol[];

    /**
-      *  Returns true if the values are the same value, false otherwise.
+      * Returns true if the values are the same value, false otherwise.
      * @param value1 The first value.
      * @param value2 The second value.
      */
@@ -598,8 +593,6 @@ interface Math {
 }

 interface RegExp {
-    [Symbol.isRegExp]: boolean;
-
    /** 
      * Matches a string with a regular expression, and returns an array containing the results of 
      * that search.
@@ -631,6 +624,20 @@ interface RegExp {
      */
    split(string: string, limit?: number): string[];

+    /**
+      * Returns a string indicating the flags of the regular expression in question. This field is read-only.
+      * The characters in this string are sequenced and concatenated in the following order:
+      *
+      *    - "g" for global
+      *    - "i" for ignoreCase
+      *    - "m" for multiline
+      *    - "u" for unicode
+      *    - "y" for sticky
+      *
+      * If no flags are set, the value is the empty string.
+      */
+    flags: string;
+
    /** 
      * Returns a Boolean value indicating the state of the sticky flag (y) used with a regular 
      * expression. Default is false. Read-only. 
--- a/tests/baselines/reference/parserSymbolProperty4.js
+++ b/tests/baselines/reference/parserSymbolProperty4.js
@@ -1,6 +1,6 @@
 //// [parserSymbolProperty4.ts]
 declare class C {
-    [Symbol.isRegExp]: string;
+    [Symbol.toPrimitive]: string;
 }

 //// [parserSymbolProperty4.js]
--- a/tests/baselines/reference/parserSymbolProperty4.types
+++ b/tests/baselines/reference/parserSymbolProperty4.types
@@ -2,8 +2,8 @@
 declare class C {
 >C : C

-    [Symbol.isRegExp]: string;
->Symbol.isRegExp : symbol
+    [Symbol.toPrimitive]: string;
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol
 }
--- a/tests/baselines/reference/parserSymbolProperty5.js
+++ b/tests/baselines/reference/parserSymbolProperty5.js
@@ -1,6 +1,6 @@
 //// [parserSymbolProperty5.ts]
 class C {
-    [Symbol.isRegExp]: string;
+    [Symbol.toPrimitive]: string;
 }

 //// [parserSymbolProperty5.js]
--- a/tests/baselines/reference/parserSymbolProperty5.types
+++ b/tests/baselines/reference/parserSymbolProperty5.types
@@ -2,8 +2,8 @@
 class C {
 >C : C

-    [Symbol.isRegExp]: string;
->Symbol.isRegExp : symbol
+    [Symbol.toPrimitive]: string;
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol
 }
--- a/tests/baselines/reference/symbolDeclarationEmit1.js
+++ b/tests/baselines/reference/symbolDeclarationEmit1.js
@@ -1,6 +1,6 @@
 //// [symbolDeclarationEmit1.ts]
 class C {
-    [Symbol.isRegExp]: number;
+    [Symbol.toPrimitive]: number;
 }

 //// [symbolDeclarationEmit1.js]
@@ -10,5 +10,5 @@ class C {

 //// [symbolDeclarationEmit1.d.ts]
 declare class C {
-    [Symbol.isRegExp]: number;
+    [Symbol.toPrimitive]: number;
 }
--- a/tests/baselines/reference/symbolDeclarationEmit1.types
+++ b/tests/baselines/reference/symbolDeclarationEmit1.types
@@ -2,8 +2,8 @@
 class C {
 >C : C

-    [Symbol.isRegExp]: number;
->Symbol.isRegExp : symbol
+    [Symbol.toPrimitive]: number;
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol
 }
--- a/tests/baselines/reference/symbolDeclarationEmit11.js
+++ b/tests/baselines/reference/symbolDeclarationEmit11.js
@@ -1,16 +1,16 @@
 //// [symbolDeclarationEmit11.ts]
 class C {
    static [Symbol.iterator] = 0;
-    static [Symbol.toPrimitive]() { }
-    static get [Symbol.isRegExp]() { return ""; }
-    static set [Symbol.isRegExp](x) { }
+    static [Symbol.isConcatSpreadable]() { }
+    static get [Symbol.toPrimitive]() { return ""; }
+    static set [Symbol.toPrimitive](x) { }
 }

 //// [symbolDeclarationEmit11.js]
 class C {
-    static [Symbol.toPrimitive]() { }
-    static get [Symbol.isRegExp]() { return ""; }
-    static set [Symbol.isRegExp](x) { }
+    static [Symbol.isConcatSpreadable]() { }
+    static get [Symbol.toPrimitive]() { return ""; }
+    static set [Symbol.toPrimitive](x) { }
 }
 C[Symbol.iterator] = 0;

@@ -18,6 +18,6 @@ C[Symbol.iterator] = 0;
 //// [symbolDeclarationEmit11.d.ts]
 declare class C {
    static [Symbol.iterator]: number;
-    static [Symbol.toPrimitive](): void;
-    static [Symbol.isRegExp]: string;
+    static [Symbol.isConcatSpreadable](): void;
+    static [Symbol.toPrimitive]: string;
 }
--- a/tests/baselines/reference/symbolDeclarationEmit11.types
+++ b/tests/baselines/reference/symbolDeclarationEmit11.types
@@ -7,19 +7,19 @@ class C {
 >Symbol : SymbolConstructor
 >iterator : symbol

-    static [Symbol.toPrimitive]() { }
+    static [Symbol.isConcatSpreadable]() { }
+>Symbol.isConcatSpreadable : symbol
+>Symbol : SymbolConstructor
+>isConcatSpreadable : symbol
+
+    static get [Symbol.toPrimitive]() { return ""; }
 >Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
 >toPrimitive : symbol

-    static get [Symbol.isRegExp]() { return ""; }
->Symbol.isRegExp : symbol
+    static set [Symbol.toPrimitive](x) { }
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
-
-    static set [Symbol.isRegExp](x) { }
->Symbol.isRegExp : symbol
->Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol
 >x : string
 }
--- a/tests/baselines/reference/symbolDeclarationEmit12.errors.txt
+++ b/tests/baselines/reference/symbolDeclarationEmit12.errors.txt
@@ -1,10 +1,13 @@
 tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts(4,28): error TS4031: Public property '[Symbol.iterator]' of exported class has or is using private name 'I'.
+tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts(5,9): error TS2300: Duplicate identifier '[Symbol.toPrimitive]'.
 tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts(5,33): error TS4073: Parameter 'x' of public method from exported class has or is using private name 'I'.
 tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts(6,40): error TS4055: Return type of public method from exported class has or is using private name 'I'.
-tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts(10,34): error TS4037: Parameter '[Symbol.isRegExp]' of public property setter from exported class has or is using private name 'I'.
+tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts(9,13): error TS2300: Duplicate identifier '[Symbol.toPrimitive]'.
+tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts(10,13): error TS2300: Duplicate identifier '[Symbol.toPrimitive]'.
+tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts(10,37): error TS4037: Parameter '[Symbol.toPrimitive]' of public property setter from exported class has or is using private name 'I'.


-==== tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts (4 errors) ====
+==== tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts (7 errors) ====
    module M {
        interface I { }
        export class C {
@@ -12,6 +15,8 @@ tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts(10,34): error TS4
                               ~
 !!! error TS4031: Public property '[Symbol.iterator]' of exported class has or is using private name 'I'.
            [Symbol.toPrimitive](x: I) { }
+            ~~~~~~~~~~~~~~~~~~~~
+!!! error TS2300: Duplicate identifier '[Symbol.toPrimitive]'.
                                    ~
 !!! error TS4073: Parameter 'x' of public method from exported class has or is using private name 'I'.
            [Symbol.isConcatSpreadable](): I {
@@ -19,9 +24,13 @@ tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts(10,34): error TS4
 !!! error TS4055: Return type of public method from exported class has or is using private name 'I'.
                return undefined
            }
-            get [Symbol.isRegExp]() { return undefined; }
-            set [Symbol.isRegExp](x: I) { }
-                                     ~
-!!! error TS4037: Parameter '[Symbol.isRegExp]' of public property setter from exported class has or is using private name 'I'.
+            get [Symbol.toPrimitive]() { return undefined; }
+                ~~~~~~~~~~~~~~~~~~~~
+!!! error TS2300: Duplicate identifier '[Symbol.toPrimitive]'.
+            set [Symbol.toPrimitive](x: I) { }
+                ~~~~~~~~~~~~~~~~~~~~
+!!! error TS2300: Duplicate identifier '[Symbol.toPrimitive]'.
+                                        ~
+!!! error TS4037: Parameter '[Symbol.toPrimitive]' of public property setter from exported class has or is using private name 'I'.
        }
    }
--- a/tests/baselines/reference/symbolDeclarationEmit12.js
+++ b/tests/baselines/reference/symbolDeclarationEmit12.js
@@ -7,8 +7,8 @@ module M {
        [Symbol.isConcatSpreadable](): I {
            return undefined
        }
-        get [Symbol.isRegExp]() { return undefined; }
-        set [Symbol.isRegExp](x: I) { }
+        get [Symbol.toPrimitive]() { return undefined; }
+        set [Symbol.toPrimitive](x: I) { }
    }
 }

@@ -20,8 +20,8 @@ var M;
        [Symbol.isConcatSpreadable]() {
            return undefined;
        }
-        get [Symbol.isRegExp]() { return undefined; }
-        set [Symbol.isRegExp](x) { }
+        get [Symbol.toPrimitive]() { return undefined; }
+        set [Symbol.toPrimitive](x) { }
    }
    M.C = C;
 })(M || (M = {}));
--- a/tests/baselines/reference/symbolDeclarationEmit13.js
+++ b/tests/baselines/reference/symbolDeclarationEmit13.js
@@ -1,18 +1,18 @@
 //// [symbolDeclarationEmit13.ts]
 class C {
-    get [Symbol.isRegExp]() { return ""; }
+    get [Symbol.toPrimitive]() { return ""; }
    set [Symbol.toStringTag](x) { }
 }

 //// [symbolDeclarationEmit13.js]
 class C {
-    get [Symbol.isRegExp]() { return ""; }
+    get [Symbol.toPrimitive]() { return ""; }
    set [Symbol.toStringTag](x) { }
 }


 //// [symbolDeclarationEmit13.d.ts]
 declare class C {
-    [Symbol.isRegExp]: string;
+    [Symbol.toPrimitive]: string;
    [Symbol.toStringTag]: any;
 }
--- a/tests/baselines/reference/symbolDeclarationEmit13.types
+++ b/tests/baselines/reference/symbolDeclarationEmit13.types
@@ -2,10 +2,10 @@
 class C {
 >C : C

-    get [Symbol.isRegExp]() { return ""; }
->Symbol.isRegExp : symbol
+    get [Symbol.toPrimitive]() { return ""; }
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol

    set [Symbol.toStringTag](x) { }
 >Symbol.toStringTag : symbol
--- a/tests/baselines/reference/symbolDeclarationEmit14.js
+++ b/tests/baselines/reference/symbolDeclarationEmit14.js
@@ -1,18 +1,18 @@
 //// [symbolDeclarationEmit14.ts]
 class C {
-    get [Symbol.isRegExp]() { return ""; }
+    get [Symbol.toPrimitive]() { return ""; }
    get [Symbol.toStringTag]() { return ""; }
 }

 //// [symbolDeclarationEmit14.js]
 class C {
-    get [Symbol.isRegExp]() { return ""; }
+    get [Symbol.toPrimitive]() { return ""; }
    get [Symbol.toStringTag]() { return ""; }
 }


 //// [symbolDeclarationEmit14.d.ts]
 declare class C {
-    [Symbol.isRegExp]: string;
+    [Symbol.toPrimitive]: string;
    [Symbol.toStringTag]: string;
 }
--- a/tests/baselines/reference/symbolDeclarationEmit14.types
+++ b/tests/baselines/reference/symbolDeclarationEmit14.types
@@ -2,10 +2,10 @@
 class C {
 >C : C

-    get [Symbol.isRegExp]() { return ""; }
->Symbol.isRegExp : symbol
+    get [Symbol.toPrimitive]() { return ""; }
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol

    get [Symbol.toStringTag]() { return ""; }
 >Symbol.toStringTag : symbol
--- a/tests/baselines/reference/symbolDeclarationEmit2.js
+++ b/tests/baselines/reference/symbolDeclarationEmit2.js
@@ -1,17 +1,17 @@
 //// [symbolDeclarationEmit2.ts]
 class C {
-    [Symbol.isRegExp] = "";
+    [Symbol.toPrimitive] = "";
 }

 //// [symbolDeclarationEmit2.js]
 class C {
    constructor() {
-        this[Symbol.isRegExp] = "";
+        this[Symbol.toPrimitive] = "";
    }
 }


 //// [symbolDeclarationEmit2.d.ts]
 declare class C {
-    [Symbol.isRegExp]: string;
+    [Symbol.toPrimitive]: string;
 }
--- a/tests/baselines/reference/symbolDeclarationEmit2.types
+++ b/tests/baselines/reference/symbolDeclarationEmit2.types
@@ -2,8 +2,8 @@
 class C {
 >C : C

-    [Symbol.isRegExp] = "";
->Symbol.isRegExp : symbol
+    [Symbol.toPrimitive] = "";
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol
 }
--- a/tests/baselines/reference/symbolDeclarationEmit3.js
+++ b/tests/baselines/reference/symbolDeclarationEmit3.js
@@ -1,18 +1,18 @@
 //// [symbolDeclarationEmit3.ts]
 class C {
-    [Symbol.isRegExp](x: number);
-    [Symbol.isRegExp](x: string);
-    [Symbol.isRegExp](x: any) { }
+    [Symbol.toPrimitive](x: number);
+    [Symbol.toPrimitive](x: string);
+    [Symbol.toPrimitive](x: any) { }
 }

 //// [symbolDeclarationEmit3.js]
 class C {
-    [Symbol.isRegExp](x) { }
+    [Symbol.toPrimitive](x) { }
 }


 //// [symbolDeclarationEmit3.d.ts]
 declare class C {
-    [Symbol.isRegExp](x: number): any;
-    [Symbol.isRegExp](x: string): any;
+    [Symbol.toPrimitive](x: number): any;
+    [Symbol.toPrimitive](x: string): any;
 }
--- a/tests/baselines/reference/symbolDeclarationEmit3.types
+++ b/tests/baselines/reference/symbolDeclarationEmit3.types
@@ -2,21 +2,21 @@
 class C {
 >C : C

-    [Symbol.isRegExp](x: number);
->Symbol.isRegExp : symbol
+    [Symbol.toPrimitive](x: number);
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol
 >x : number

-    [Symbol.isRegExp](x: string);
->Symbol.isRegExp : symbol
+    [Symbol.toPrimitive](x: string);
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol
 >x : string

-    [Symbol.isRegExp](x: any) { }
->Symbol.isRegExp : symbol
+    [Symbol.toPrimitive](x: any) { }
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol
 >x : any
 }
--- a/tests/baselines/reference/symbolDeclarationEmit4.js
+++ b/tests/baselines/reference/symbolDeclarationEmit4.js
@@ -1,17 +1,17 @@
 //// [symbolDeclarationEmit4.ts]
 class C {
-    get [Symbol.isRegExp]() { return ""; }
-    set [Symbol.isRegExp](x) { }
+    get [Symbol.toPrimitive]() { return ""; }
+    set [Symbol.toPrimitive](x) { }
 }

 //// [symbolDeclarationEmit4.js]
 class C {
-    get [Symbol.isRegExp]() { return ""; }
-    set [Symbol.isRegExp](x) { }
+    get [Symbol.toPrimitive]() { return ""; }
+    set [Symbol.toPrimitive](x) { }
 }


 //// [symbolDeclarationEmit4.d.ts]
 declare class C {
-    [Symbol.isRegExp]: string;
+    [Symbol.toPrimitive]: string;
 }
--- a/tests/baselines/reference/symbolDeclarationEmit4.types
+++ b/tests/baselines/reference/symbolDeclarationEmit4.types
@@ -2,14 +2,14 @@
 class C {
 >C : C

-    get [Symbol.isRegExp]() { return ""; }
->Symbol.isRegExp : symbol
+    get [Symbol.toPrimitive]() { return ""; }
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol

-    set [Symbol.isRegExp](x) { }
->Symbol.isRegExp : symbol
+    set [Symbol.toPrimitive](x) { }
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol
 >x : string
 }
--- a/tests/baselines/reference/symbolProperty21.js
+++ b/tests/baselines/reference/symbolProperty21.js
@@ -8,13 +8,13 @@ declare function foo<T, U>(p: I<T, U>): { t: T; u: U };

 foo({
    [Symbol.isConcatSpreadable]: "",
-    [Symbol.isRegExp]: 0,
+    [Symbol.toPrimitive]: 0,
    [Symbol.unscopables]: true
 });

 //// [symbolProperty21.js]
 foo({
    [Symbol.isConcatSpreadable]: "",
-    [Symbol.isRegExp]: 0,
+    [Symbol.toPrimitive]: 0,
    [Symbol.unscopables]: true
 });
--- a/tests/baselines/reference/symbolProperty21.types
+++ b/tests/baselines/reference/symbolProperty21.types
@@ -31,19 +31,19 @@ declare function foo<T, U>(p: I<T, U>): { t: T; u: U };
 >U : U

 foo({
->foo({    [Symbol.isConcatSpreadable]: "",    [Symbol.isRegExp]: 0,    [Symbol.unscopables]: true}) : { t: boolean; u: string; }
+>foo({    [Symbol.isConcatSpreadable]: "",    [Symbol.toPrimitive]: 0,    [Symbol.unscopables]: true}) : { t: boolean; u: string; }
 >foo : <T, U>(p: I<T, U>) => { t: T; u: U; }
->{    [Symbol.isConcatSpreadable]: "",    [Symbol.isRegExp]: 0,    [Symbol.unscopables]: true} : { [Symbol.isConcatSpreadable]: string; [Symbol.isRegExp]: number; [Symbol.unscopables]: boolean; }
+>{    [Symbol.isConcatSpreadable]: "",    [Symbol.toPrimitive]: 0,    [Symbol.unscopables]: true} : { [Symbol.isConcatSpreadable]: string; [Symbol.toPrimitive]: number; [Symbol.unscopables]: boolean; }

    [Symbol.isConcatSpreadable]: "",
 >Symbol.isConcatSpreadable : symbol
 >Symbol : SymbolConstructor
 >isConcatSpreadable : symbol

-    [Symbol.isRegExp]: 0,
->Symbol.isRegExp : symbol
+    [Symbol.toPrimitive]: 0,
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol

    [Symbol.unscopables]: true
 >Symbol.unscopables : symbol
--- a/tests/baselines/reference/symbolProperty5.js
+++ b/tests/baselines/reference/symbolProperty5.js
@@ -1,7 +1,7 @@
 //// [symbolProperty5.ts]
 var x = {
    [Symbol.iterator]: 0,
-    [Symbol.isRegExp]() { },
+    [Symbol.toPrimitive]() { },
    get [Symbol.toStringTag]() {
        return 0;
    }
@@ -10,7 +10,7 @@ var x = {
 //// [symbolProperty5.js]
 var x = {
    [Symbol.iterator]: 0,
-    [Symbol.isRegExp]() { },
+    [Symbol.toPrimitive]() { },
    get [Symbol.toStringTag]() {
        return 0;
    }
--- a/tests/baselines/reference/symbolProperty5.types
+++ b/tests/baselines/reference/symbolProperty5.types
@@ -1,17 +1,17 @@
 === tests/cases/conformance/es6/Symbols/symbolProperty5.ts ===
 var x = {
->x : { [Symbol.iterator]: number; [Symbol.isRegExp](): void; [Symbol.toStringTag]: number; }
->{    [Symbol.iterator]: 0,    [Symbol.isRegExp]() { },    get [Symbol.toStringTag]() {        return 0;    }} : { [Symbol.iterator]: number; [Symbol.isRegExp](): void; [Symbol.toStringTag]: number; }
+>x : { [Symbol.iterator]: number; [Symbol.toPrimitive](): void; [Symbol.toStringTag]: number; }
+>{    [Symbol.iterator]: 0,    [Symbol.toPrimitive]() { },    get [Symbol.toStringTag]() {        return 0;    }} : { [Symbol.iterator]: number; [Symbol.toPrimitive](): void; [Symbol.toStringTag]: number; }

    [Symbol.iterator]: 0,
 >Symbol.iterator : symbol
 >Symbol : SymbolConstructor
 >iterator : symbol

-    [Symbol.isRegExp]() { },
->Symbol.isRegExp : symbol
+    [Symbol.toPrimitive]() { },
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol

    get [Symbol.toStringTag]() {
 >Symbol.toStringTag : symbol
--- a/tests/baselines/reference/symbolProperty6.js
+++ b/tests/baselines/reference/symbolProperty6.js
@@ -2,7 +2,7 @@
 class C {
    [Symbol.iterator] = 0;
    [Symbol.unscopables]: number;
-    [Symbol.isRegExp]() { }
+    [Symbol.toPrimitive]() { }
    get [Symbol.toStringTag]() {
        return 0;
    }
@@ -13,7 +13,7 @@ class C {
    constructor() {
        this[Symbol.iterator] = 0;
    }
-    [Symbol.isRegExp]() { }
+    [Symbol.toPrimitive]() { }
    get [Symbol.toStringTag]() {
        return 0;
    }
--- a/tests/baselines/reference/symbolProperty6.types
+++ b/tests/baselines/reference/symbolProperty6.types
@@ -12,10 +12,10 @@ class C {
 >Symbol : SymbolConstructor
 >unscopables : symbol

-    [Symbol.isRegExp]() { }
->Symbol.isRegExp : symbol
+    [Symbol.toPrimitive]() { }
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol

    get [Symbol.toStringTag]() {
 >Symbol.toStringTag : symbol
--- a/tests/baselines/reference/symbolProperty8.js
+++ b/tests/baselines/reference/symbolProperty8.js
@@ -1,7 +1,7 @@
 //// [symbolProperty8.ts]
 interface I {
    [Symbol.unscopables]: number;
-    [Symbol.isRegExp]();
+    [Symbol.toPrimitive]();
 }

 //// [symbolProperty8.js]
--- a/tests/baselines/reference/symbolProperty8.types
+++ b/tests/baselines/reference/symbolProperty8.types
@@ -7,8 +7,8 @@ interface I {
 >Symbol : SymbolConstructor
 >unscopables : symbol

-    [Symbol.isRegExp]();
->Symbol.isRegExp : symbol
+    [Symbol.toPrimitive]();
+>Symbol.toPrimitive : symbol
 >Symbol : SymbolConstructor
->isRegExp : symbol
+>toPrimitive : symbol
 }
--- a/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit1.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit1.ts
@@ -1,5 +1,5 @@
 //@target: ES6
 //@declaration: true
 class C {
-    [Symbol.isRegExp]: number;
+    [Symbol.toPrimitive]: number;
 }
--- a/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit11.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit11.ts
@@ -2,7 +2,7 @@
 //@declaration: true
 class C {
    static [Symbol.iterator] = 0;
-    static [Symbol.toPrimitive]() { }
-    static get [Symbol.isRegExp]() { return ""; }
-    static set [Symbol.isRegExp](x) { }
+    static [Symbol.isConcatSpreadable]() { }
+    static get [Symbol.toPrimitive]() { return ""; }
+    static set [Symbol.toPrimitive](x) { }
 }
--- a/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit12.ts
@@ -8,7 +8,7 @@ module M {
        [Symbol.isConcatSpreadable](): I {
            return undefined
        }
-        get [Symbol.isRegExp]() { return undefined; }
-        set [Symbol.isRegExp](x: I) { }
+        get [Symbol.toPrimitive]() { return undefined; }
+        set [Symbol.toPrimitive](x: I) { }
    }
 }
--- a/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit13.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit13.ts
@@ -1,6 +1,6 @@
 //@target: ES6
 //@declaration: true
 class C {
-    get [Symbol.isRegExp]() { return ""; }
+    get [Symbol.toPrimitive]() { return ""; }
    set [Symbol.toStringTag](x) { }
 }
--- a/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit14.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit14.ts
@@ -1,6 +1,6 @@
 //@target: ES6
 //@declaration: true
 class C {
-    get [Symbol.isRegExp]() { return ""; }
+    get [Symbol.toPrimitive]() { return ""; }
    get [Symbol.toStringTag]() { return ""; }
 }
--- a/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit2.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit2.ts
@@ -1,5 +1,5 @@
 //@target: ES6
 //@declaration: true
 class C {
-    [Symbol.isRegExp] = "";
+    [Symbol.toPrimitive] = "";
 }
--- a/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit3.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit3.ts
@@ -1,7 +1,7 @@
 //@target: ES6
 //@declaration: true
 class C {
-    [Symbol.isRegExp](x: number);
-    [Symbol.isRegExp](x: string);
-    [Symbol.isRegExp](x: any) { }
+    [Symbol.toPrimitive](x: number);
+    [Symbol.toPrimitive](x: string);
+    [Symbol.toPrimitive](x: any) { }
 }
--- a/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit4.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolDeclarationEmit4.ts
@@ -1,6 +1,6 @@
 //@target: ES6
 //@declaration: true
 class C {
-    get [Symbol.isRegExp]() { return ""; }
-    set [Symbol.isRegExp](x) { }
+    get [Symbol.toPrimitive]() { return ""; }
+    set [Symbol.toPrimitive](x) { }
 }
--- a/tests/cases/conformance/es6/Symbols/symbolProperty21.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolProperty21.ts
@@ -8,6 +8,6 @@ declare function foo<T, U>(p: I<T, U>): { t: T; u: U };

 foo({
    [Symbol.isConcatSpreadable]: "",
-    [Symbol.isRegExp]: 0,
+    [Symbol.toPrimitive]: 0,
    [Symbol.unscopables]: true
 });
--- a/tests/cases/conformance/es6/Symbols/symbolProperty5.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolProperty5.ts
@@ -1,7 +1,7 @@
 //@target: ES6
 var x = {
    [Symbol.iterator]: 0,
-    [Symbol.isRegExp]() { },
+    [Symbol.toPrimitive]() { },
    get [Symbol.toStringTag]() {
        return 0;
    }
--- a/tests/cases/conformance/es6/Symbols/symbolProperty6.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolProperty6.ts
@@ -2,7 +2,7 @@
 class C {
    [Symbol.iterator] = 0;
    [Symbol.unscopables]: number;
-    [Symbol.isRegExp]() { }
+    [Symbol.toPrimitive]() { }
    get [Symbol.toStringTag]() {
        return 0;
    }
--- a/tests/cases/conformance/es6/Symbols/symbolProperty8.ts
+++ b/tests/cases/conformance/es6/Symbols/symbolProperty8.ts
@@ -1,5 +1,5 @@
 //@target: ES6
 interface I {
    [Symbol.unscopables]: number;
-    [Symbol.isRegExp]();
+    [Symbol.toPrimitive]();
 }
--- a/tests/cases/conformance/parser/ecmascript6/Symbols/parserSymbolProperty4.ts
+++ b/tests/cases/conformance/parser/ecmascript6/Symbols/parserSymbolProperty4.ts
@@ -1,4 +1,4 @@
 //@target: ES6
 declare class C {
-    [Symbol.isRegExp]: string;
+    [Symbol.toPrimitive]: string;
 }
--- a/tests/cases/conformance/parser/ecmascript6/Symbols/parserSymbolProperty5.ts
+++ b/tests/cases/conformance/parser/ecmascript6/Symbols/parserSymbolProperty5.ts
@@ -1,4 +1,4 @@
 //@target: ES6
 class C {
-    [Symbol.isRegExp]: string;
+    [Symbol.toPrimitive]: string;
 }