rust: Create a root file for modules

The new `lib.rs` file is created to refer to all modules written in Rust. This way, only one `rustc` call is needed to compile an arbitrary amount of modules. It also converges with the way crates are structured.

src/imservice.rs

@@ -1,11 +1,10 @@
-#[macro_use]
-mod bitflags;
-
 use std::boxed::Box;
 use std::ffi::CString;
 use std::num::Wrapping;
 use std::string::String;
 
+use super::bitflags;
+
 /// Gathers stuff defined in C or called by C
 pub mod c {
     use super::*;
@@ -221,7 +220,7 @@ pub enum ContentPurpose {
 
 impl ContentPurpose {
     fn from_num(num: u32) -> Option<ContentPurpose> {
-        use ContentPurpose::*;
+        use self::ContentPurpose::*;
         match num {
             0 => Some(Normal),
             1 => Some(Alpha),
@@ -241,7 +240,7 @@ impl ContentPurpose {
         }
     }
     fn as_num(self: &ContentPurpose) -> u32 {
-        use ContentPurpose::*;
+        use self::ContentPurpose::*;
         match self {
             Normal => 0,
             Alpha => 1,

src/lib.rs

@@ -0,0 +1,3 @@
+#[macro_use]
+mod bitflags;
+mod imservice;

src/meson.build

@@ -69,7 +69,7 @@ deps = [
 # Replacement for eekboard-server
 rslib = static_library(
   'rslib',
-  sources: ['imservice.rs'],
+  sources: ['lib.rs'],
   rust_crate_type: 'staticlib'
 )