new test

tests/basic/whileret.e

+main(x){
+  while(x > 0){
+    if (x == 3){
+      return 12;
+    }
+    x = x - 1;
+  }
+  return -3;
+}

tests/basic/whileret.e.expect_14_12_3_8_12

+{"output": "", "error": null, "retval": 12}
\ No newline at end of file

tests/basic/whileret.e.expect_1_2_3

+{"output": "", "error": null, "retval": -3}
\ No newline at end of file

tests/basic/whileret.e.expect_lexer

+SYM_IDENTIFIER(main)
+SYM_LPARENTHESIS
+SYM_IDENTIFIER(x)
+SYM_RPARENTHESIS
+SYM_LBRACE
+SYM_WHILE
+SYM_LPARENTHESIS
+SYM_IDENTIFIER(x)
+SYM_GT
+SYM_INTEGER(0)
+SYM_RPARENTHESIS
+SYM_LBRACE
+SYM_IF
+SYM_LPARENTHESIS
+SYM_IDENTIFIER(x)
+SYM_EQUALITY
+SYM_INTEGER(3)
+SYM_RPARENTHESIS
+SYM_LBRACE
+SYM_RETURN
+SYM_INTEGER(12)
+SYM_SEMICOLON
+SYM_RBRACE
+SYM_IDENTIFIER(x)
+SYM_ASSIGN
+SYM_IDENTIFIER(x)
+SYM_MINUS
+SYM_INTEGER(1)
+SYM_SEMICOLON
+SYM_RBRACE
+SYM_RETURN
+SYM_MINUS
+SYM_INTEGER(3)
+SYM_SEMICOLON
+SYM_RBRACE
+SYM_EOF