Scanner rework. (#3038)

The scanner was an on-demand tool of the parser, which was triggered by certain
statements. After the rework, the scanner runs only once, and collects all information.
This information is passed to the parser.

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

tests/jerry/es2015/arrow-function.js

@@ -125,6 +125,13 @@ default:
   func = () =>
     ((([0,0,0])))
   assert (func ().length == 3);
+
+  func = (a = 5, b = 7 * 2) => a + b;
+  assert (func() == 19);
+  assert (func(1) == 15);
+
+  func = (a = Math.cos(0)) => a;
+  assert (func() == 1);
 }
 
 must_throw ("var x => x;");
@@ -136,6 +143,7 @@ must_throw ("(x,y,) => 0");
 must_throw ("x\n => 0");
 must_throw ("this => 0");
 must_throw ("(true) => 0");
+must_throw ("()\n=>5");
 must_throw_strict ("(package) => 0");
 must_throw_strict ("(package) => { return 5 }");
 must_throw_strict ("(x,x,x) => 0");

tests/jerry/es2015/module-export-01.js

@@ -39,3 +39,6 @@ assert (x === 42);
 assert (f(1) === 1);
 var dog = new Dog("Pluto")
 assert(dog.speak() === "Pluto barks.")
+
+// Pre-scanner regression test
+for (var tmp in {}) ;

tests/jerry/es2015/module-export-02.js

@@ -18,3 +18,6 @@ export {aa,} from "module-export-01.js";
 export {bb as b_, cc as c_} from "module-export-01.js";
 export * from "module-export-01.js";
 export default function () {return "default"};
+
+// Pre-scanner regression test
+for (var tmp in {}) ;

tests/jerry/es2015/module-export-03.js

@@ -24,3 +24,6 @@ export default class {
 }
 
 export * from "module-export-02.js"
+
+// Pre-scanner regression test
+for (var tmp in {}) ;

tests/jerry/es2015/module-export-04.js

@@ -15,3 +15,6 @@
 
 export var x = 41
 export default a = "str"
+
+// Pre-scanner regression test
+for (var tmp in {}) ;

tests/jerry/es2015/module-export-05.js

@@ -16,3 +16,6 @@
 export * from "module-export-01.js";
 export * from "module-export-04.js";
 export default a = "str"
+
+// Pre-scanner regression test
+for (var tmp in {}) ;

tests/jerry/es2015/module-export-06.js

@@ -17,3 +17,6 @@ export {}
 export {} from "module-export-01.js";
 export {};
 export {} from "module-export-04.js"
+
+// Pre-scanner regression test
+for (var tmp in {}) ;

tests/jerry/es2015/module-export-07.js

@@ -15,3 +15,6 @@
 
 var y, z;
 export default x = y = z = "default";
+
+// Pre-scanner regression test
+for (var tmp in {}) ;

tests/jerry/es2015/module-import-01.js

@@ -31,3 +31,6 @@ assert (mod.f("str") === "str")
 
 var dog = new mod.Dog("Oddie")
 assert (dog.speak() === "Oddie barks.")
+
+// Pre-scanner regression test
+for (var tmp in {}) ;

tests/jerry/es2015/module-import-02.js

@@ -22,3 +22,6 @@ assert (b_ === 5)
 assert (c_(b_) === 10)
 assert (mod.x === 42)
 assert (Array.isArray(mod.d))
+
+// Pre-scanner regression test
+for (var tmp in {}) ;

tests/jerry/es2015/module-import-03.js

@@ -22,3 +22,6 @@ assert(i.incr() === 6);
 assert (aa === "a");
 assert (x === 42);
 assert (c_(x) == 84);
+
+// Pre-scanner regression test
+for (var tmp in {}) ;

tests/jerry/es2015/module-import-04.js

@@ -17,3 +17,6 @@ import "module-import-01.js";
 import "module-export-05.js";
 import "module-export-06.js";
 import "module-export-07.js";
+
+// Pre-scanner regression test
+for (var tmp in {}) ;

tests/jerry/regression-test-issue-1555.js

@@ -14,7 +14,7 @@
 
 var src = "var a = 0; while(a) { switch(a) {";
 /* The += operation has a longer opcode. */
-for (var i = 0; i < 4000; i++)
+for (var i = 0; i < 3500; i++)
     src += "case " + i + ": a += a += a; break; ";
 src += "} }";