added test cases

test/corpus/positive/ArrayExpression8.txt

@@ -0,0 +1,94 @@
+====================
+ArrayExpression8
+====================
+
+function main() {
+        int b;
+        int[10] x;
+
+        x[b = 4] = 4;
+
+        return;
+}
+
+--------------------
+
+(source_file
+  (translation_entity
+    (function_definition
+      (identifier)
+      (function_signature)
+      (statement_block
+        (block_item_list
+          (block_item
+            (declaration
+              (declaration_specifier
+                (type_specifier_qualifier
+                  (type_specifier
+                    (int_type))))
+              (init_declarator
+                (identifier))))
+          (block_item
+            (declaration
+              (declaration_specifier
+                (type_specifier_qualifier
+                  (type_specifier
+                    (array_specifier
+                      (type_specifier
+                        (int_type))
+                      (constant_expression
+                        (logical_expression
+                          (equality_expression
+                            (relational_expression
+                              (additive_expression
+                                (multiplicative_expression
+                                  (cast_expression
+                                    (unary_expression
+                                      (postfix_expression
+                                        (base_expression
+                                          (constant
+                                            (integer_literal))))))))))))))))
+              (init_declarator
+                (identifier))))
+          (block_item
+            (statement
+              (expression_statement
+                (expression
+                  (assignment_expression
+                    (unary_expression
+                      (postfix_expression
+                        (base_expression
+                          (identifier))
+                        (expression
+                          (assignment_expression
+                            (unary_expression
+                              (postfix_expression
+                                (base_expression
+                                  (identifier))))
+                            (assignment_expression
+                              (logical_expression
+                                (equality_expression
+                                  (relational_expression
+                                    (additive_expression
+                                      (multiplicative_expression
+                                        (cast_expression
+                                          (unary_expression
+                                            (postfix_expression
+                                              (base_expression
+                                                (constant
+                                                  (integer_literal))))))))))))))))
+                    (assignment_expression
+                      (logical_expression
+                        (equality_expression
+                          (relational_expression
+                            (additive_expression
+                              (multiplicative_expression
+                                (cast_expression
+                                  (unary_expression
+                                    (postfix_expression
+                                      (base_expression
+                                        (constant
+                                          (integer_literal)))))))))))))))))
+          (block_item
+            (statement
+              (jump_statement))))))))