From fcb1eef3232c3fc673bf5f98595708e108c3950c Mon Sep 17 00:00:00 2001
From: Edwin Cheng <edwin0cheng@gmail.com>
Date: Sat, 25 May 2019 20:31:53 +0800
Subject: Change TokenSource to iteration based

---
 crates/ra_mbe/src/syntax_bridge.rs | 42 ++++++++++++++++++++++----------------
 1 file changed, 24 insertions(+), 18 deletions(-)

(limited to 'crates/ra_mbe/src/syntax_bridge.rs')

diff --git a/crates/ra_mbe/src/syntax_bridge.rs b/crates/ra_mbe/src/syntax_bridge.rs
index 0a75305b4..0aab5ea8b 100644
--- a/crates/ra_mbe/src/syntax_bridge.rs
+++ b/crates/ra_mbe/src/syntax_bridge.rs
@@ -48,9 +48,10 @@ pub fn syntax_node_to_token_tree(node: &SyntaxNode) -> Option<(tt::Subtree, Toke
 /// Parses the token tree (result of macro expansion) to an expression
 pub fn token_tree_to_expr(tt: &tt::Subtree) -> Result<TreeArc<ast::Expr>, ExpandError> {
     let buffer = tt::buffer::TokenBuffer::new(&[tt.clone().into()]);
-    let token_source = SubtreeTokenSource::new(&buffer);
-    let mut tree_sink = TtTreeSink::new(token_source.querier());
-    ra_parser::parse_expr(&token_source, &mut tree_sink);
+    let mut token_source = SubtreeTokenSource::new(&buffer);
+    let querier = token_source.querier();
+    let mut tree_sink = TtTreeSink::new(querier.as_ref());
+    ra_parser::parse_expr(&mut token_source, &mut tree_sink);
     if tree_sink.roots.len() != 1 {
         return Err(ExpandError::ConversionError);
     }
@@ -64,9 +65,10 @@ pub fn token_tree_to_expr(tt: &tt::Subtree) -> Result<TreeArc<ast::Expr>, Expand
 /// Parses the token tree (result of macro expansion) to a Pattern
 pub fn token_tree_to_pat(tt: &tt::Subtree) -> Result<TreeArc<ast::Pat>, ExpandError> {
     let buffer = tt::buffer::TokenBuffer::new(&[tt.clone().into()]);
-    let token_source = SubtreeTokenSource::new(&buffer);
-    let mut tree_sink = TtTreeSink::new(token_source.querier());
-    ra_parser::parse_pat(&token_source, &mut tree_sink);
+    let mut token_source = SubtreeTokenSource::new(&buffer);
+    let querier = token_source.querier();
+    let mut tree_sink = TtTreeSink::new(querier.as_ref());
+    ra_parser::parse_pat(&mut token_source, &mut tree_sink);
     if tree_sink.roots.len() != 1 {
         return Err(ExpandError::ConversionError);
     }
@@ -78,9 +80,10 @@ pub fn token_tree_to_pat(tt: &tt::Subtree) -> Result<TreeArc<ast::Pat>, ExpandEr
 /// Parses the token tree (result of macro expansion) to a Type
 pub fn token_tree_to_ty(tt: &tt::Subtree) -> Result<TreeArc<ast::TypeRef>, ExpandError> {
     let buffer = tt::buffer::TokenBuffer::new(&[tt.clone().into()]);
-    let token_source = SubtreeTokenSource::new(&buffer);
-    let mut tree_sink = TtTreeSink::new(token_source.querier());
-    ra_parser::parse_ty(&token_source, &mut tree_sink);
+    let mut token_source = SubtreeTokenSource::new(&buffer);
+    let querier = token_source.querier();
+    let mut tree_sink = TtTreeSink::new(querier.as_ref());
+    ra_parser::parse_ty(&mut token_source, &mut tree_sink);
     if tree_sink.roots.len() != 1 {
         return Err(ExpandError::ConversionError);
     }
@@ -93,9 +96,10 @@ pub fn token_tree_to_macro_stmts(
     tt: &tt::Subtree,
 ) -> Result<TreeArc<ast::MacroStmts>, ExpandError> {
     let buffer = tt::buffer::TokenBuffer::new(&[tt.clone().into()]);
-    let token_source = SubtreeTokenSource::new(&buffer);
-    let mut tree_sink = TtTreeSink::new(token_source.querier());
-    ra_parser::parse_macro_stmts(&token_source, &mut tree_sink);
+    let mut token_source = SubtreeTokenSource::new(&buffer);
+    let querier = token_source.querier();
+    let mut tree_sink = TtTreeSink::new(querier.as_ref());
+    ra_parser::parse_macro_stmts(&mut token_source, &mut tree_sink);
     if tree_sink.roots.len() != 1 {
         return Err(ExpandError::ConversionError);
     }
@@ -108,9 +112,10 @@ pub fn token_tree_to_macro_items(
     tt: &tt::Subtree,
 ) -> Result<TreeArc<ast::MacroItems>, ExpandError> {
     let buffer = tt::buffer::TokenBuffer::new(&[tt.clone().into()]);
-    let token_source = SubtreeTokenSource::new(&buffer);
-    let mut tree_sink = TtTreeSink::new(token_source.querier());
-    ra_parser::parse_macro_items(&token_source, &mut tree_sink);
+    let mut token_source = SubtreeTokenSource::new(&buffer);
+    let querier = token_source.querier();
+    let mut tree_sink = TtTreeSink::new(querier.as_ref());
+    ra_parser::parse_macro_items(&mut token_source, &mut tree_sink);
     if tree_sink.roots.len() != 1 {
         return Err(ExpandError::ConversionError);
     }
@@ -121,9 +126,10 @@ pub fn token_tree_to_macro_items(
 /// Parses the token tree (result of macro expansion) as a sequence of items
 pub fn token_tree_to_ast_item_list(tt: &tt::Subtree) -> TreeArc<ast::SourceFile> {
     let buffer = tt::buffer::TokenBuffer::new(&[tt.clone().into()]);
-    let token_source = SubtreeTokenSource::new(&buffer);
-    let mut tree_sink = TtTreeSink::new(token_source.querier());
-    ra_parser::parse(&token_source, &mut tree_sink);
+    let mut token_source = SubtreeTokenSource::new(&buffer);
+    let querier = token_source.querier();
+    let mut tree_sink = TtTreeSink::new(querier.as_ref());
+    ra_parser::parse(&mut token_source, &mut tree_sink);
     let syntax = tree_sink.inner.finish();
     ast::SourceFile::cast(&syntax).unwrap().to_owned()
 }
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