Initial data commit

Task/Empty-string/Lang/empty-string.lang

@@ -0,0 +1,26 @@
+# Text creation
+# Empty text escape sequence
+$s = \e
+$s = {{{}}}
+# With simple assignment:
+$s=
+
+# "$s =" would not work, as ist would set $s to null
+
+# Is empty
+fn.println(parser.con($s == \e))
+fn.println(parser.con($s === \e))
+fn.println(parser.con(!$s))
+fn.println(fn.conNot($s))
+fn.println(parser.con(fn.strlen($s) == 0))
+fn.println(parser.con(fn.len($s) == 0))
+fn.println(parser.op(@$s == 0))
+
+# Is not empty
+fn.println(parser.con($s != \e))
+fn.println(parser.con($s !== \e))
+fn.println(parser.con($s)) # Must be used in conditional parsing mode (Execution parsing mode would return $s as is)
+fn.println(fn.bool($s))
+fn.println(parser.con(fn.strlen($s) > 0))
+fn.println(parser.con(fn.len($s) > 0))
+fn.println(parser.op(@$s > 0))