Remove enum_iterator

It is used only in mk_enum and the macro knows already its variants so
it can be manually implemented.

Cargo.toml

@@ -12,7 +12,6 @@ license = "MPL-2.0"
 
 [dependencies]
 aho-corasick = "^0.7"
-enum-iterator = "^0.7"
 fxhash = "0.2"
 lazy_static = "^1.3"
 num-format = "^0.4"

enums/src/go.rs

@@ -1,5 +1,4 @@
 use askama::Template;
-use enum_iterator::IntoEnumIterator;
 use std::fs::File;
 use std::io::Write;
 use std::path::PathBuf;

enums/src/json.rs

@@ -1,5 +1,4 @@
 use askama::Template;
-use enum_iterator::IntoEnumIterator;
 use std::fs::File;
 use std::io::Write;
 use std::path::PathBuf;

enums/src/languages.rs

@@ -1,4 +1,3 @@
-use enum_iterator::IntoEnumIterator;
 use tree_sitter::Language;
 
 use crate::*;

enums/src/lib.rs

@@ -1,5 +1,4 @@
 extern crate askama;
-extern crate enum_iterator;
 extern crate tree_sitter;
 
 #[macro_use]

enums/src/rust.rs

@@ -1,5 +1,4 @@
 use askama::Template;
-use enum_iterator::IntoEnumIterator;
 use std::env;
 use std::fs::File;
 use std::io::{Read, Write};

src/langs.rs

@@ -1,4 +1,3 @@
-use enum_iterator::IntoEnumIterator;
 use std::path::Path;
 use std::sync::Arc;
 use tree_sitter::Language;

src/macros.rs

@@ -46,13 +46,19 @@ macro_rules! get_language {
 macro_rules! mk_enum {
     ( $( $camel:ident, $description:expr ),* ) => {
         /// The list of supported languages.
-        #[derive(Clone, Copy, Debug, IntoEnumIterator, PartialEq)]
+        #[derive(Clone, Copy, Debug, PartialEq)]
         pub enum LANG {
             $(
                 #[doc = $description]
                 $camel,
             )*
         }
+        impl LANG {
+            pub fn into_enum_iter() -> impl Iterator<Item=LANG> {
+                use LANG::*;
+                [$( $camel, )*].into_iter()
+            }
+        }
     };
 }