generate: now we have a way to do errors, i guess

src/lib.rs

@@ -1,6 +1,21 @@
 pub mod test {
-    pub struct WasiCtx {} // FIXME: parameterize macro on what ctx type is used here
     generate::from_witx!("test.witx");
+
+    pub struct WasiCtx {} // FIXME: parameterize macro on what ctx type is used here
+
+    impl types::WitxErrorConversion for WasiCtx {
+        fn success_to_errno(&mut self) -> types::Errno {
+            types::Errno::Ok
+        }
+        fn memory_error_to_errno(&mut self, e: ::memory::MemoryError) -> types::Errno {
+            eprintln!("memory error: {:?}", e);
+            types::Errno::InvalidArg
+        }
+        fn value_error_to_errno(&mut self, e: ::memory::GuestValueError) -> types::Errno {
+            eprintln!("guest value error: {:?}", e);
+            types::Errno::InvalidArg
+        }
+    }
 }
 /*
 pub mod wasi {