Split parsing and generation into separate modules.

src/gen.rs

@@ -0,0 +1,27 @@
+//! Details of generating code for the `ruma_event` procedural macro.
+
+use proc_macro2::TokenStream;
+use quote::{quote, ToTokens};
+
+use crate::parse::RumaEventInput;
+
+/// The result of processing the `ruma_event` macro, ready for output back to source code.
+pub struct RumaEvent;
+
+impl From<RumaEventInput> for RumaEvent {
+    // TODO: Provide an actual impl for this.
+    fn from(_input: RumaEventInput) -> Self {
+        Self
+    }
+}
+
+impl ToTokens for RumaEvent {
+    // TODO: Provide an actual impl for this.
+    fn to_tokens(&self, tokens: &mut TokenStream) {
+        let output = quote!(
+            pub struct Foo {}
+        );
+
+        output.to_tokens(tokens);
+    }
+}

src/lib.rs

@@ -34,9 +34,10 @@ extern crate proc_macro;
 use proc_macro::TokenStream;
 use quote::ToTokens;
 
-use crate::event::{RumaEvent, RumaEventInput};
+use crate::{gen::RumaEvent, parse::RumaEventInput};
 
-mod event;
+mod gen;
+mod parse;
 
 // A note about the `example` modules that appears in doctests:
 //

src/parse.rs

@@ -1,8 +1,7 @@
-//! Details of the `ruma_event` procedural macro.
+//! Details of parsing input for the `ruma_event` procedural macro.
 
-use proc_macro2::{Span, TokenStream};
+use proc_macro2::Span;
 
-use quote::{quote, ToTokens};
 use syn::{
     braced,
     parse::{self, Parse, ParseStream},
@@ -12,27 +11,6 @@ use syn::{
     TypePath,
 };
 
-/// The result of processing the `ruma_event` macro, ready for output back to source code.
-pub struct RumaEvent;
-
-impl From<RumaEventInput> for RumaEvent {
-    // TODO: Provide an actual impl for this.
-    fn from(_input: RumaEventInput) -> Self {
-        Self
-    }
-}
-
-impl ToTokens for RumaEvent {
-    // TODO: Provide an actual impl for this.
-    fn to_tokens(&self, tokens: &mut TokenStream) {
-        let output = quote!(
-            pub struct Foo {}
-        );
-
-        output.to_tokens(tokens);
-    }
-}
-
 /// The entire `ruma_event!` macro structure directly as it appears in the source code..
 pub struct RumaEventInput {
     /// Outer attributes on the field, such as a docstring.