Implement exponentiation operation. (#3692)

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

tests/jerry/arithmetic-parse.js

@@ -45,6 +45,11 @@ parse ("c = a-");
 parse("a++\n()");
 parse("a--\n.b");
 
+assert((-2 .toString()) === -2);
+
+Number.prototype[0] = 123;
+assert(-2[0] === -123);
+
 function f() {
   var a = 0;
   function g() {}

tests/jerry/es2015/exponentiation.js

@@ -0,0 +1,73 @@
+/* Copyright JS Foundation and other contributors, http://js.foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var two = 2
+var three = 3
+
+// Precedence (right-to-left) tests
+assert(2 ** 3 ** 2 === 512)
+assert((2 ** 3) ** 2 === 64)
+assert(2 ** (3 ** 2) === 512)
+assert(two ** three ** two === 512)
+assert((two ** three) ** two === 64)
+assert(two ** (three ** two) === 512)
+
+assert(2 ** 2 * 3 ** 3 === 4 * 27)
+assert(two ** two * three ** three === 4 * 27)
+
+var a = 3
+assert((a **= 3) === 27)
+assert(a === 27)
+
+a = 2
+assert((a **= a **= 2) === 16)
+assert(a === 16)
+
+function assertThrows(src) {
+  try {
+    eval(src)
+    assert(false)
+  } catch (e) {
+    assert(e instanceof SyntaxError)
+  }
+}
+
+assertThrows("-2 ** 2")
+assertThrows("+a ** 2")
+assertThrows("!a ** 2")
+assertThrows("~a ** 2")
+assertThrows("void a ** 2")
+assertThrows("typeof a ** 2")
+assertThrows("delete a ** 2")
+assertThrows("!(-a) ** 2")
+
+assert((-2) ** 2 === 4)
+
+a = 3
+assert((-+-a) ** 3 === 27)
+
+a = 0
+assert((!a) ** 2 === 1)
+
+a = 0
+assert(isNaN((void a) ** 3))
+
+a = -4
+assert(++a ** 2 === 9)
+assert(a === -3)
+
+a = -2
+assert(a-- ** 2 === 4)
+assert(a === -3)

tests/unit-core/test-snapshot.c

@@ -223,12 +223,12 @@ main (void)
     /* Check the snapshot data. Unused bytes should be filled with zeroes */
     const uint8_t expected_data[] =
     {
-      0x4A, 0x52, 0x52, 0x59, 0x28, 0x00, 0x00, 0x00,
+      0x4A, 0x52, 0x52, 0x59, 0x29, 0x00, 0x00, 0x00,
       0x00, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00,
       0x01, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00,
       0x03, 0x00, 0x01, 0x00, 0x41, 0x00, 0x01, 0x00,
       0x00, 0x00, 0x00, 0x01, 0x18, 0x00, 0x00, 0x00,
-      0x2C, 0x00, 0xC3, 0x50, 0x00, 0x00, 0x00, 0x00,
+      0x2C, 0x00, 0xC6, 0x50, 0x00, 0x00, 0x00, 0x00,
       0x03, 0x00, 0x01, 0x00, 0x41, 0x00, 0x00, 0x00,
       0x00, 0x00, 0x01, 0x01, 0x07, 0x00, 0x00, 0x00,
       0x51, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,