parser: Read {a,}sync-func annotations

Author: A6GibKm

src/library.rs

@@ -552,6 +552,8 @@ pub struct Function {
     pub doc: Option<String>,
     pub doc_deprecated: Option<String>,
     pub finish_func: Option<String>,
+    pub async_func: Option<String>,
+    pub sync_func: Option<String>,
 }
 
 #[derive(Debug)]

src/parser.rs

@@ -596,6 +596,8 @@ impl Library {
                 doc,
                 doc_deprecated,
                 finish_func: None,
+                async_func: None,
+                sync_func: None,
             })
         } else {
             Err(parser.fail("Missing <return-value> element"))
@@ -1019,6 +1021,8 @@ impl Library {
         let is_method = kind == FunctionKind::Method;
         let version = self.read_version(parser, ns_id, elem)?;
         let deprecated_version = self.read_deprecated_version(parser, ns_id, elem)?;
+        let async_func = elem.attr("async-func").map(ToString::to_string);
+        let sync_func = elem.attr("sync-func").map(ToString::to_string);
         let finish_func = c_identifier.and_then(|c_identifier| {
             elem.attr("finish-func").map(|finish_func_name| {
                 format!(
@@ -1092,6 +1096,8 @@ impl Library {
                 doc,
                 doc_deprecated,
                 finish_func,
+                async_func,
+                sync_func,
             })
         } else {
             Err(parser.fail_with_position(