jscript: Added '%=' expression implementation.

dlls/jscript/engine.c

@@ -2973,10 +2973,13 @@ HRESULT assign_div_expression_eval(exec_ctx_t *ctx, expression_t *_expr, DWORD f
 }
 
 /* ECMA-262 3rd Edition    11.13.2 */
-HRESULT assign_mod_expression_eval(exec_ctx_t *ctx, expression_t *expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
+HRESULT assign_mod_expression_eval(exec_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
 {
-    FIXME("\n");
-    return E_NOTIMPL;
+    binary_expression_t *expr = (binary_expression_t*)_expr;
+
+    TRACE("\n");
+
+    return assign_oper_eval(ctx, expr->expression1, expr->expression2, mod_eval, ei, ret);
 }
 
 /* ECMA-262 3rd Edition    11.13.2 */

dlls/jscript/tests/lang.js

@@ -279,6 +279,10 @@ tmp = 5;
 ok((tmp /= 2) === 2.5, "tmp /= 2 !== 2.5");
 ok(tmp === 2.5, "tmp !=== 2.5");
 
+tmp = 3;
+ok((tmp %= 2) === 1, "tmp %= 2 !== 1");
+ok(tmp === 1, "tmp !== 1");
+
 tmp = 8;
 ok((tmp <<= 1) === 16, "tmp <<= 1 !== 16");