iter 22b.3.1: mono pass skeleton — identity for class-free workspaces

crates/ail/src/main.rs

@@ -2032,6 +2032,13 @@ fn build_to(
         // load-time remains valid.
         registry: ws.registry.clone(),
     };
+    // Iter 22b.3: monomorphisation pass. After `lift_letrecs` and
+    // before codegen, every (class-method, concrete-type) call-site
+    // pair becomes a synthesised top-level fn; user call sites are
+    // rewritten to target those names. Class-free workspaces flow
+    // through bit-identically; see `ailang_check::monomorphise_workspace`.
+    let ws = ailang_check::monomorphise_workspace(&ws)
+        .map_err(|e| anyhow::anyhow!("monomorphise_workspace: {e}"))?;
     let ir = ailang_codegen::lower_workspace_with_alloc(&ws, alloc)?;
     let tmpdir = std::env::temp_dir().join(format!("ailang-{}", std::process::id()));
     std::fs::create_dir_all(&tmpdir)?;