diff options
Diffstat (limited to 'crates/ra_mbe/src/syntax_bridge.rs')
-rw-r--r-- | crates/ra_mbe/src/syntax_bridge.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/crates/ra_mbe/src/syntax_bridge.rs b/crates/ra_mbe/src/syntax_bridge.rs index 28ded7870..19e09be80 100644 --- a/crates/ra_mbe/src/syntax_bridge.rs +++ b/crates/ra_mbe/src/syntax_bridge.rs | |||
@@ -30,6 +30,29 @@ pub fn syntax_node_to_token_tree(node: &SyntaxNode) -> Option<(tt::Subtree, Toke | |||
30 | Some((tt, token_map)) | 30 | Some((tt, token_map)) |
31 | } | 31 | } |
32 | 32 | ||
33 | // The following items are what `rustc` macro can be parsed into : | ||
34 | // link: https://github.com/rust-lang/rust/blob/9ebf47851a357faa4cd97f4b1dc7835f6376e639/src/libsyntax/ext/expand.rs#L141 | ||
35 | // * Expr(P<ast::Expr>) | ||
36 | // * Pat(P<ast::Pat>) | ||
37 | // * Ty(P<ast::Ty>) | ||
38 | // * Stmts(SmallVec<[ast::Stmt; 1]>) | ||
39 | // * Items(SmallVec<[P<ast::Item>; 1]>) | ||
40 | // | ||
41 | // * TraitItems(SmallVec<[ast::TraitItem; 1]>) | ||
42 | // * ImplItems(SmallVec<[ast::ImplItem; 1]>) | ||
43 | // * ForeignItems(SmallVec<[ast::ForeignItem; 1]> | ||
44 | // | ||
45 | // | ||
46 | |||
47 | /// Parses the token tree (result of macro expansion) as a sequence of items | ||
48 | pub fn token_tree_to_macro_items(tt: &tt::Subtree) -> TreeArc<ast::MacroItems> { | ||
49 | let token_source = SubtreeTokenSource::new(tt); | ||
50 | let mut tree_sink = TtTreeSink::new(token_source.querier()); | ||
51 | ra_parser::parse_macro_items(&token_source, &mut tree_sink); | ||
52 | let syntax = tree_sink.inner.finish(); | ||
53 | ast::MacroItems::cast(&syntax).unwrap().to_owned() | ||
54 | } | ||
55 | |||
33 | /// Parses the token tree (result of macro expansion) as a sequence of items | 56 | /// Parses the token tree (result of macro expansion) as a sequence of items |
34 | pub fn token_tree_to_ast_item_list(tt: &tt::Subtree) -> TreeArc<ast::SourceFile> { | 57 | pub fn token_tree_to_ast_item_list(tt: &tt::Subtree) -> TreeArc<ast::SourceFile> { |
35 | let token_source = SubtreeTokenSource::new(tt); | 58 | let token_source = SubtreeTokenSource::new(tt); |