Update docs&bump version to v0.5.5-rust and v0.3.13-python

Cargo.toml

@@ -14,7 +14,7 @@ keywords = [
 license = "MIT OR Apache-2.0"
 name = "kbnf"
 repository = "https://github.com/Dan-Wanna-M/kbnf"
-version = "0.5.4"
+version = "0.5.5"
 [lib]
 name = "kbnf"
 crate-type = ["cdylib", "rlib"]

pyproject.toml

@@ -6,7 +6,7 @@ python-source = "python"
 features = ["python"]
 [project]
 name = "kbnf"
-version = "0.3.12"
+version = "0.3.13"
 dependencies = ["numpy"]
 requires-python = ">=3.7"
 classifiers = [

src/lib.rs

@@ -360,7 +360,9 @@ a nonempty sequence of "A"s and "B"s followed by exactly one "C".*)
 
 ## Regular expression
 
-A UTF-8 string enclosed in `#""` or `#e""` is a regular expression. The escaped characters supported is the same as [Terminal](##terminal).
+There are three types of regular expressions:
+
+- A UTF-8 string enclosed in `#""` or `#''` is a regular expression. The escaped characters supported is the same as [Terminal](##terminal).
 
 ```ebnf
 start ::= #".*A";
@@ -372,6 +374,8 @@ start ::= #".+" "A";
 *)
 ```
 
+- A UTF-8 string enclosed in `#e""` or `#e''` is a regular expression. The escaped characters supported is the same as [Terminal](##terminal).
+
 ```ebnf
 start ::= #e".*AA";
 (*
@@ -382,6 +386,16 @@ In other words, two consecutive A will not appear in the middle of the output.
 *)
 ```
 
+- A UTF-8 string enclosed in `#ex""` or `#ex''` is a complement of a regular expression. The escaped characters supported is the same as [Terminal](##terminal).
+
+```ebnf
+start ::= #ex"a|b|c" "A";
+(*
+The engine will constrain the output to be anything that does not contain "a", "b", or "c" followed by "A".
+*)
+```
+
+
 The Rust regex crate is used to support regular expressions,
 which means [the syntax supported](https://docs.rs/regex/latest/regex/index.html#syntax) might differ from other regex engines.
 Notably, the regex crate does not support arbitrary lookarounds. In exchange, linear time matching is guaranteed.