Adds support for #[wasm_bindgen(typescript_custom_section)].

crates/backend/src/ast.rs

@@ -22,6 +22,8 @@ pub struct Program {
     /// objects" in the sense that they represent a JS object with a particular
     /// shape in JIT parlance.
     pub dictionaries: Vec<Dictionary>,
+    /// custom typescript sections to be included in the definition file
+    pub typescript_custom_sections: Vec<String>,
 }
 
 /// A rust to js interface. Allows interaction with rust objects/functions

crates/backend/src/encode.rs

@@ -46,6 +46,7 @@ fn shared_program<'a>(prog: &'a ast::Program, intern: &'a Interner)
         imports: prog.imports.iter()
             .map(|a| shared_import(a, intern))
             .collect::<Result<Vec<_>, _>>()?,
+        typescript_custom_sections: prog.typescript_custom_sections.iter().map(|x| -> &'a str { &x }).collect(),
         // version: shared::version(),
         // schema_version: shared::SCHEMA_VERSION.to_string(),
     })