Improve eval call parsing. (#3330)

Eval calls are recognised when the eval identifier is encapsulated in brackets.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

tests/jerry/es2015/arrow-function.js

@@ -137,7 +137,9 @@ default:
 must_throw ("var x => x;");
 must_throw ("(()) => 0");
 must_throw ("((x)) => 0");
+must_throw ("(((x))) => 0");
 must_throw ("(x,) => 0");
+must_throw ("(x==6) => 0");
 must_throw ("(x y) => 0");
 must_throw ("(x,y,) => 0");
 must_throw ("x\n => 0");
@@ -148,3 +150,27 @@ must_throw_strict ("(package) => 0");
 must_throw_strict ("(package) => { return 5 }");
 must_throw_strict ("(x,x,x) => 0");
 must_throw_strict ("(x,x,x) => { }");
+
+var f = (a) => 1;
+assert(f() === 1);
+
+var f = (a => 2);
+assert(f() === 2);
+
+var f = ((((a => ((3))))));
+assert(f() === 3);
+
+var f = (((a) => 4));
+assert(f() === 4);
+
+var f = (a,b) => 5;
+assert(f() === 5);
+
+var f = (((a,b) => 6));
+assert(f() === 6);
+
+var f = ((a,b) => x => (a) => 7);
+assert(f()()() === 7);
+
+var f = (((a=1,b=2) => ((x => (((a) => 8))))));
+assert(f()()() === 8);

tests/jerry/eval.js

@@ -122,3 +122,33 @@ catch(e)
 code = 'eval("(function (){})")';
 code = "eval ('" + code + "')";
 eval (code);
+
+// Eval enclosed in brackets is still an eval.
+var p1 = 0;
+
+function f3() {
+  var p1 = 5;
+  (eval)("assert(p1 === 5)");
+}
+f3();
+
+function f4() {
+  var p1 = 6;
+  ((eval))("assert(p1 === 6)");
+}
+f4();
+
+function f5() {
+  var p1 = 7;
+  (((((eval)))("assert(p1 === 7)")));
+}
+f5();
+
+function f6() {
+  var p1 = 8;
+  var e = eval;
+
+  e("assert(p1 === 0)");
+  (((((e)))("assert(p1 === 0)")));
+}
+f6();