Fix record pattern completion

Author: flodiebold

crates/ra_ide/src/completion/complete_keyword.rs

@@ -79,6 +79,7 @@ pub(super) fn complete_expr_keyword(acc: &mut Completions, ctx: &CompletionConte
 }
 
 fn is_in_loop_body(leaf: &SyntaxToken) -> bool {
+    // FIXME move this to CompletionContext and make it handle macros
     for node in leaf.parent().ancestors() {
         if node.kind() == FN_DEF || node.kind() == LAMBDA_EXPR {
             break;

crates/ra_ide/src/completion/complete_record_pattern.rs

@@ -87,4 +87,32 @@ mod tests {
         ]
         "###);
     }
+
+    #[test]
+    fn test_record_pattern_field_in_simple_macro() {
+        let completions = complete(
+            r"
+            macro_rules! m { ($e:expr) => { $e } }
+            struct S { foo: u32 }
+
+            fn process(f: S) {
+                m!(match f {
+                    S { f<|>: 92 } => (),
+                })
+            }
+            ",
+        );
+        assert_debug_snapshot!(completions, @r###"
+        [
+            CompletionItem {
+                label: "foo",
+                source_range: [171; 172),
+                delete: [171; 172),
+                insert: "foo",
+                kind: Field,
+                detail: "u32",
+            },
+        ]
+        "###);
+    }
 }

crates/ra_ide/src/completion/completion_context.rs

@@ -185,7 +185,7 @@ impl<'a> CompletionContext<'a> {
             }
             if name.syntax().ancestors().find_map(ast::RecordFieldPatList::cast).is_some() {
                 self.record_lit_pat =
-                    self.sema.find_node_at_offset_with_macros(&original_file, self.offset);
+                    self.sema.find_node_at_offset_with_macros(&original_file, offset);
             }
         }
     }