Create a codegen macro that generates ftl files from a struct

Cargo.lock

@@ -2901,6 +2901,10 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "messages-codegen"
+version = "0.1.0"
+
 [[package]]
 name = "mime"
 version = "0.2.6"

Cargo.toml

@@ -22,6 +22,7 @@ members = [
     "kifu/gtk",
     "l10n",
     "memorycache",
+    "messages-codegen",
     "nom-training",
     "result-extended",
     "screenplay",

messages-codegen/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "messages-codegen"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

messages-codegen/src/lib.rs

@@ -0,0 +1,53 @@
+/* Given that fluent doesn't provide an ability to see all of the placeholders within a message,
+ * and that the placeholders may change depending on the values of others, I don't have a way to
+ * ensure that the translation code remains entirely connected to the source messages themselves.
+ *
+ * Given that I can't really enforce it, I can, perhaps, codegen it in a way that at least the two
+ * are right next to one another. A macro that generates the data structure and can write the
+ * source strings file.
+ *
+ * For overall file structure, I want the messages, L10N, and FluentErgo tied together.
+ */
+
+#[macro_export]
+macro_rules! messages {
+    ($($name:ident($($arg:ident: $argtype:ty)*) => $message:literal,)+) => {
+        pub enum Messages {
+            $($name($name)),+
+        }
+
+        impl Messages {
+            fn gen_strings() -> Vec<String> {
+                vec![
+                    $(concat!(stringify!($name), " => ", $message).to_string(),)+
+                ]
+            }
+        }
+
+        $(pub struct $name {
+            $($arg: $argtype)*
+        })+
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    messages! {
+        Welcome(name: String) => "Hello, ${name}",
+        GamesInDatabase(count: usize) => "{$count ->
+    [one] There is one game in the database
+    *[other] There are ${count} games in the database
+}",
+    }
+
+    #[test]
+    fn it_can_generate_an_ftl() {
+        for s in Messages::gen_strings() {
+            println!("{}", s);
+        }
+
+        assert!(false);
+    }
+}