Add host-structured imports

crates/decodal-wasm/src/lib.rs

@@ -1,8 +1,8 @@
 use std::collections::BTreeMap;
 
 use decodal::{
-    Data, Diagnostic, DiagnosticKind, EmptyLoader, Engine, LoadedSource, SourceId, SourceLoader,
-    Span, format_diagnostic_with,
+    Data, Diagnostic, DiagnosticKind, EmptyLoader, Engine, ImportLoader, LoadedImport,
+    LoadedSource, SourceId, Span, format_diagnostic_with,
 };
 use wasm_bindgen::prelude::*;
 
@@ -76,12 +76,12 @@ struct VirtualLoader {
     files: BTreeMap<String, String>,
 }
 
-impl SourceLoader for VirtualLoader {
+impl ImportLoader for VirtualLoader {
     fn load(
         &mut self,
         current_key: Option<&str>,
         specifier: &str,
-    ) -> decodal::Result<LoadedSource> {
+    ) -> decodal::Result<LoadedImport> {
         let key = resolve_import(current_key, specifier).ok_or_else(|| {
             Diagnostic::new(
                 DiagnosticKind::Import,
@@ -96,11 +96,11 @@ impl SourceLoader for VirtualLoader {
                 format!("import `{specifier}` resolved to `{key}`, but that file does not exist"),
             )
         })?;
-        Ok(LoadedSource {
+        Ok(LoadedImport::Source(LoadedSource {
             key: key.clone(),
             name: key,
             source,
-        })
+        }))
     }
 }