use macro to generate language list

fralonra · Dec 16, 2023 · 6409976 · 6409976
1 parent 9089459
commit 6409976
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Showing 2 changed files with 49 additions and 50 deletions.
diff --git a/src/i18n.rs b/src/i18n.rs
@@ -7,6 +7,15 @@ use i18n_embed::{
 use lazy_static::lazy_static;
 use rust_embed::RustEmbed;
 
+macro_rules! lang {
+    ($id:tt, $label:tt) => {
+        Language {
+            id: $id,
+            label: $label,
+        }
+    };
+}
+
 #[derive(RustEmbed)]
 #[folder = "i18n/"]
 struct Localizations;
@@ -26,56 +35,22 @@ pub struct Language {
     pub label: &'static str,
 }
 
-pub const LANGUAGES: [Language; 12] = [
-    Language {
-        id: "ar",
-        label: "العربية (Arabic)",
-    },
-    Language {
-        id: "de",
-        label: "Deutsch (German)",
-    },
-    Language {
-        id: "en",
-        label: "English (English)",
-    },
-    Language {
-        id: "es",
-        label: "Español (Spanish)",
-    },
-    Language {
-        id: "fr",
-        label: "Français (French)",
-    },
-    Language {
-        id: "it",
-        label: "Italiano (Italian)",
-    },
-    Language {
-        id: "ja",
-        label: "日本語 (Japanese)",
-    },
-    Language {
-        id: "ko",
-        label: "한국어 (Korean)",
-    },
-    Language {
-        id: "pt",
-        label: "Português (Portuguese)",
-    },
-    Language {
-        id: "ru",
-        label: "Русский (Russian)",
-    },
-    Language {
-        id: "zh_CN",
-        label: "简体中文 (Simplified Chinese)",
-    },
-    Language {
-        id: "zh_TW",
-        label: "繁體中文 (Traditional Chinese)",
-    },
-];
+const_array!(
+    pub LANGUAGES: Language [
+        lang!("ar", "العربية (Arabic)"),
+        lang!("de", "Deutsch (German)"),
+        lang!("en", "English (English)"),
+        lang!("es", "Español (Spanish)"),
+        lang!("fr", "Français (French)"),
+        lang!("it", "Italiano (Italian)"),
+        lang!("ja", "日本語 (Japanese)"),
+        lang!("ko", "한국어 (Korean)"),
+        lang!("pt", "Português (Portuguese)"),
+        lang!("ru", "Русский (Russian)"),
+        lang!("zh_CN", "简体中文 (Simplified Chinese)"),
+        lang!("zh_TW", "繁體中文 (Traditional Chinese)")
+    ]
+);
 
 pub fn select_locales(request_languages: &[&'static str]) -> Result<()> {
     let requested_languages: Vec<LanguageIdentifier> = request_languages

diff --git a/src/macros.rs b/src/macros.rs
@@ -1,3 +1,21 @@
+macro_rules! const_array {
+    (
+        $vis:vis $name:ident: $ty:ty [
+            $($item:expr),*
+        ]
+    ) => {
+        $vis const $name: [$ty; count_tts!($($item)*)] = [
+            $(
+                $item,
+            )*
+        ];
+    };
+}
+
+macro_rules! count_tts {
+    ($($tts:tt)*) => {0usize $(+ replace_expr!($tts 1usize))*};
+}
+
 macro_rules! fl {
     ($message_id:literal) => {{
         i18n_embed_fl::fl!($crate::i18n::LANGUAGE_LOADER, $message_id)
@@ -7,3 +25,9 @@ macro_rules! fl {
         i18n_embed_fl::fl!($crate::i18n::LANGUAGE_LOADER, $message_id, $($args), *)
     }};
 }
+
+macro_rules! replace_expr {
+    ($_t:tt $sub:expr) => {
+        $sub
+    };
+}