Jacek Caban : jscript: Add function name to its scope chain in ES5 mode.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 1985f330f8a8790bc3b23b999b84b7f615d6f508
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=1985f330f8a8790bc3b23b999...

Author: Jacek Caban 
Date:   Mon Apr 12 15:47:58 2021 +0200

jscript: Add function name to its scope chain in ES5 mode.

Signed-off-by: Jacek Caban 
Signed-off-by: Alexandre Julliard

---

dlls/jscript/engine.c             |  8 ++++++++
 dlls/mshtml/tests/documentmode.js | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/dlls/jscript/engine.c b/dlls/jscript/engine.c
index 06b0fd673b3..f3d9d694b2a 100644
--- a/dlls/jscript/engine.c
+++ b/dlls/jscript/engine.c
@@ -661,6 +661,14 @@ static HRESULT identifier_eval(script_ctx_t *ctx, BSTR identifier, exprval_t *re
                     if(FAILED(hres))
                         return hres;
                 }
+
+                /* ECMA-262 5.1 Edition    13 */
+                if(func->name && ctx->version >= SCRIPTLANGUAGEVERSION_ES5 && !wcscmp(identifier, func->name)) {
+                    TRACE("returning a function from scope chain\n");
+                    ret->type = EXPRVAL_JSVAL;
+                    ret->u.val = jsval_obj(jsdisp_addref(scope->frame->function_instance));
+                    return S_OK;
+                }
             }
             if(scope->jsobj)
                 hres = jsdisp_get_id(scope->jsobj, identifier, fdexNameImplicit, &id);
diff --git a/dlls/mshtml/tests/documentmode.js b/dlls/mshtml/tests/documentmode.js
index 75a132e83a7..82f8aae4ed9 100644
--- a/dlls/mshtml/tests/documentmode.js
+++ b/dlls/mshtml/tests/documentmode.js
@@ -534,3 +534,39 @@ sync_test("delete_prop", function() {
     todo_wine.
     ok(!("globalprop4" in obj), "globalprop4 is still in obj");
 });
+
+var func_scope_val = 1;
+
+sync_test("func_scope", function() {
+    var func_scope_val = 2;
+
+    var f = function func_scope_val() {
+        return func_scope_val;
+    };
+
+    func_scope_val = 3;
+    if(document.documentMode < 9) {
+        ok(f() === 3, "f() = " + f());
+        return;
+    }
+    ok(f === f(), "f() = " + f());
+
+    f = function func_scope_val(a) {
+        func_scope_val = 4;
+        return func_scope_val;
+    };
+
+    func_scope_val = 3;
+    ok(f === f(), "f() = " + f());
+    ok(func_scope_val === 3, "func_scope_val = " + func_scope_val);
+    ok(window.func_scope_val === 1, "window.func_scope_val = " + window.func_scope_val);
+
+    f = function func_scope_val(a) {
+        return (function() { return a ? func_scope_val(false) : func_scope_val; })();
+    };
+
+    ok(f === f(true), "f(true) = " + f(true));
+
+    window = 1;
+    ok(window === window.self, "window = " + window);
+});