make import of other crates not necessary anymore, use once_cell

Fix #1

Author: Canop

CHANGELOG.md

@@ -0,0 +1,8 @@
+<a name="v1.1.0"></a>
+### v1.1.0 - 2021-05-08
+- no more complementary import needed
+- now based on once_cell instead of lazy_static
+
+<a name="v1.0.0"></a>
+### v1.0.0 - 2021-05-04
+- first public release

Cargo.toml

@@ -1,15 +1,16 @@
 [package]
 name = "lazy-regex"
-version = "1.0.0"
+version = "1.1.0"
 authors = ["Canop <[email protected]>"]
 edition = "2018"
 description = "a macro to reduce regex creation boilerplate"
-keywords = ["macro", "lazy_static", "regex"]
+keywords = ["macro", "lazy", "static", "regex"]
 license = "MIT"
 categories = ["text-processing"]
 repository = "https://github.com/Canop/lazy-regex"
 readme = "README.md"
 
 [dependencies]
-lazy_static = "1"
+once_cell = "1.7"
+regex = "1.4"
 

README.md

@@ -33,7 +33,8 @@ The first code comes from the regex documentation.
 
 ### Is it really useful ?
 
-Regarding the binary, it's *exactly* as using lazy_static. It just makes some code a little easier to read. You're judge.
+Regarding the binary, it's as using lazy_static or once_cell.
+It just makes some code a little easier to read. You're judge.
 
 ### Can I have several `regex!` in the same function ? On the same Line ?
 
@@ -49,4 +50,4 @@ You mean something like `regex!("somestring", "i")` ? Cool. I was just waiting f
 
 ### What's the licence ?
 
-It's MIT. But you're also free to just copy the macro in your code if it's simpler, no attribution is needed.
+It's MIT. No attribution is needed.

src/lib.rs

@@ -26,13 +26,13 @@ fn some_helper_function(text: &str) -> bool {
 
 */
 
+pub use once_cell;
+
 #[macro_export]
 macro_rules! regex {
     ($s: literal) => {{
-        use regex::Regex;
-        lazy_static! {
-            static ref RE: Regex = Regex::new($s).unwrap();
-        }
-        &*RE
+        use lazy_regex::once_cell::sync::OnceCell;
+        static RE: OnceCell::<regex::Regex> = OnceCell::new();
+        RE.get_or_init(|| regex::Regex::new($s).unwrap())
     }};
 }