implemented eval()

src/js/libcs/Operators.js

@@ -4372,6 +4372,23 @@ evaluator.self$0 = function (args, modifs) {
     return Json._helper.self;
 };
 
+evaluator.eval$1 = function (args, modifs) {
+    Object.entries(modifs).forEach(function ([key, value]) {
+        let val = evaluate(value);
+        namespace.newvar(key);
+        namespace.setvar(key, val);
+    });
+
+    namespace.pushVstack("*");
+    const erg = evaluate(args[0]);
+    namespace.cleanVstack();
+    Object.entries(modifs).forEach(function ([key, value]) {
+        namespace.removevar(key);
+    });
+    return erg;
+    //                    return tt(args,modifs);
+};
+
 ///////////////////////////////
 //   Calling external code   //
 ///////////////////////////////

tests/ColonOp_tests.js

@@ -127,3 +127,7 @@ describe("Assign code to JSON objects", function () {
     itCmd('obj={};obj:"code":=(x=x*7);x=1;obj.code;obj.code;x', "49");
     itCmd('obj={};obj:"code":=(x=x*7);x=1;obj:"code";obj.code;x', "49");
 });
+
+describe("Calling code through eval", function () {
+    itCmd("eval(x+y,x->2,y->5)", "7");
+});