WIP

crates/compiler/gen_llvm/src/llvm/build.rs

@@ -4591,9 +4591,6 @@ pub fn build_procedures<'a, 'ctx, 'env>(
     let niche = Niche::NONE;
 
     for (symbol, top_level) in glue_layouts.getters.iter().copied() {
-        dbg!(symbol, unsafe {
-            std::mem::transmute::<Symbol, u64>(symbol)
-        });
         let it = top_level.arguments.iter().copied();
         let bytes = roc_alias_analysis::func_name_bytes_help(symbol, it, niche, &top_level.result);
         let func_name = FuncName(&bytes);
@@ -4613,6 +4610,8 @@ pub fn build_procedures<'a, 'ctx, 'env>(
         let name = getter_fn.get_name().to_str().unwrap();
         let getter_name = symbol.as_str(&env.interns);
 
+        dbg!(&getter_name);
+
         // Add the getter function to the module.
         let _ = expose_function_to_host_help_c_abi(
             env,

crates/glue/src/types.rs

@@ -974,7 +974,7 @@ fn add_type_help<'a>(
                 add_type_help(env, ret_layout, *ret_var, None, types)
             };
 
-            let name = format!("TODO_roc_function_{:?}", closure_var);
+            let name = format!("RocFunction_{:?}", closure_var);
             let fn_type_id = types.add_named(
                 &env.layout_cache.interner,
                 name.clone(),

examples/platform-switching/rust-platform/main.roc

@@ -7,5 +7,9 @@ platform "echo-in-rust"
 
 Op : [StdoutWrite Str ({} -> Op), StderrWrite Str ({} -> Op), Done]
 
+
+# mainForHost : { bar: Str, foo: I64 -> I64 }
+# mainForHost = { bar: main, foo: \x -> x }
+
 mainForHost : Op
 mainForHost = main

examples/platform-switching/rust-platform/src/glue.rs

@@ -97,6 +97,21 @@ union union_Op {
     _sizer: [u8; 8],
 }
 
+#[derive(Clone)]
+struct RocFunction_3 { 
+    closure_data: T
+}
+
+impl RocFunction_3 { 
+    pub fn call(self) -> U { 
+        extern "C" { 
+            fn call_the_closure(T) -> U ;
+        }
+
+        call_the_closure(self.closure_data)
+    }
+}
+
 impl Op {
     #[cfg(any(
         target_arch = "arm",

examples/platform-switching/rust-platform/src/lib.rs

@@ -93,7 +93,7 @@ pub extern "C" fn rust_main() -> i32 {
 
     println!("Let's do things!");
 
-    let op: Op = unsafe {
+    let mut op: Op = unsafe {
         let mut mem = MaybeUninit::uninit();
 
         roc_main(mem.as_mut_ptr());
@@ -101,10 +101,11 @@ pub extern "C" fn rust_main() -> i32 {
         mem.assume_init()
     };
 
+    loop {
         match dbg!(op.discriminant()) {
             StdoutWrite => {
                 let output: RocStr = unsafe { op.get_StdoutWrite_0() };
-            // let _next = unsafe { op.get_StdoutWrite_1() };
+                op = unsafe { op.get_StdoutWrite_1() };
 
                 dbg!(&output);
 
@@ -115,12 +116,18 @@ pub extern "C" fn rust_main() -> i32 {
             StderrWrite => {
                 let output: RocStr = unsafe { op.get_StderrWrite_0() };
                 // let _next = unsafe { op.get_StderrWrite_1() };
+                dbg!(&output);
+
+                break;
 
                 if let Err(e) = std::io::stderr().write_all(output.as_bytes()) {
                     panic!("Writing to stderr failed! {:?}", e);
                 }
             }
-        Done => {}
+            Done => {
+                break;
+            }
+        }
     }
 
     println!("Done!");

examples/platform-switching/zig-platform/main.roc

@@ -5,5 +5,5 @@ platform "echo-in-zig"
     imports []
     provides [mainForHost]
 
-mainForHost : Str
+mainForHost : { bar: Str, foo: I64 -> I64 }
-mainForHost = main
+mainForHost = { bar: main, foo: \x -> x }