9 files changed, 18 insertions, 24 deletions

diff --git a/crates/ra_assists/src/add_impl.rs b/crates/ra_assists/src/add_impl.rs
index 9a0cfb4e7..59ca88468 100644
--- a/crates/ra_assists/src/add_impl.rs
+++ b/crates/ra_assists/src/add_impl.rs
@@ -1,3 +1,5 @@
+use std::fmt::Write;
+
 use hir::db::HirDatabase;
 use join_to_string::join;
 use ra_syntax::{
@@ -17,7 +19,7 @@ pub(crate) fn add_impl(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
         let mut buf = String::new();
         buf.push_str("\n\nimpl");
         if let Some(type_params) = &type_params {
-            type_params.syntax().text().push_to(&mut buf);
+            write!(buf, "{}", type_params.syntax()).unwrap();
         }
         buf.push_str(" ");
         buf.push_str(name.text().as_str());
diff --git a/crates/ra_assists/src/ast_editor.rs b/crates/ra_assists/src/ast_editor.rs
index 36235eb13..ab6c347ad 100644
--- a/crates/ra_assists/src/ast_editor.rs
+++ b/crates/ra_assists/src/ast_editor.rs
@@ -95,7 +95,7 @@ impl AstEditor<ast::NamedFieldList> {
         position: InsertPosition<&'_ ast::NamedField>,
         field: &ast::NamedField,
     ) {
-        let is_multiline = self.ast().syntax().text().contains('\n');
+        let is_multiline = self.ast().syntax().text().contains_char('\n');
         let ws;
         let space = if is_multiline {
             ws = tokens::WsBuilder::new(&format!(
diff --git a/crates/ra_assists/src/introduce_variable.rs b/crates/ra_assists/src/introduce_variable.rs
index df6c58989..911de2d48 100644
--- a/crates/ra_assists/src/introduce_variable.rs
+++ b/crates/ra_assists/src/introduce_variable.rs
@@ -1,3 +1,5 @@
+use std::fmt::Write;
+
 use hir::db::HirDatabase;
 use ra_syntax::{
     ast::{self, AstNode},
@@ -35,8 +37,7 @@ pub(crate) fn introduce_variable(mut ctx: AssistCtx<impl HirDatabase>) -> Option
             buf.push_str("let var_name = ");
             TextUnit::of_str("let ")
         };
-
-        expr.syntax().text().push_to(&mut buf);
+        write!(buf, "{}", expr.syntax()).unwrap();
         let full_stmt = ast::ExprStmt::cast(anchor_stmt.clone());
         let is_full_stmt = if let Some(expr_stmt) = &full_stmt {
             Some(expr.syntax().clone()) == expr_stmt.expr().map(|e| e.syntax().clone())
diff --git a/crates/ra_fmt/src/lib.rs b/crates/ra_fmt/src/lib.rs
index d6e895729..b09478d7a 100644
--- a/crates/ra_fmt/src/lib.rs
+++ b/crates/ra_fmt/src/lib.rs
@@ -36,7 +36,7 @@ fn prev_tokens(token: SyntaxToken) -> impl Iterator<Item = SyntaxToken> {
 
 pub fn extract_trivial_expression(block: &ast::Block) -> Option<ast::Expr> {
     let expr = block.expr()?;
-    if expr.syntax().text().contains('\n') {
+    if expr.syntax().text().contains_char('\n') {
         return None;
     }
     let non_trivial_children = block.syntax().children().filter(|it| match it.kind() {
diff --git a/crates/ra_ide_api/src/display/short_label.rs b/crates/ra_ide_api/src/display/short_label.rs
index f926f631f..be499e485 100644
--- a/crates/ra_ide_api/src/display/short_label.rs
+++ b/crates/ra_ide_api/src/display/short_label.rs
@@ -1,3 +1,5 @@
+use std::fmt::Write;
+
 use ra_syntax::ast::{self, AstNode, NameOwner, TypeAscriptionOwner, VisibilityOwner};
 
 pub(crate) trait ShortLabel {
@@ -71,8 +73,7 @@ where
     let mut buf = short_label_from_node(node, prefix)?;
 
     if let Some(type_ref) = node.ascribed_type() {
-        buf.push_str(": ");
-        type_ref.syntax().text().push_to(&mut buf);
+        write!(buf, ": {}", type_ref.syntax()).unwrap();
     }
 
     Some(buf)
@@ -82,7 +83,7 @@ fn short_label_from_node<T>(node: &T, label: &str) -> Option<String>
 where
     T: NameOwner + VisibilityOwner,
 {
-    let mut buf = node.visibility().map(|v| format!("{} ", v.syntax().text())).unwrap_or_default();
+    let mut buf = node.visibility().map(|v| format!("{} ", v.syntax())).unwrap_or_default();
     buf.push_str(label);
     buf.push_str(node.name()?.text().as_str());
     Some(buf)
diff --git a/crates/ra_ide_api/src/folding_ranges.rs b/crates/ra_ide_api/src/folding_ranges.rs
index 9699000db..571d1c595 100644
--- a/crates/ra_ide_api/src/folding_ranges.rs
+++ b/crates/ra_ide_api/src/folding_ranges.rs
@@ -31,7 +31,7 @@ pub(crate) fn folding_ranges(file: &SourceFile) -> Vec<Fold> {
         // Fold items that span multiple lines
         if let Some(kind) = fold_kind(element.kind()) {
             let is_multiline = match &element {
-                SyntaxElement::Node(node) => node.text().contains('\n'),
+                SyntaxElement::Node(node) => node.text().contains_char('\n'),
                 SyntaxElement::Token(token) => token.text().contains('\n'),
             };
             if is_multiline {
diff --git a/crates/ra_ide_api/src/join_lines.rs b/crates/ra_ide_api/src/join_lines.rs
index fa998ebe1..7f25f2108 100644
--- a/crates/ra_ide_api/src/join_lines.rs
+++ b/crates/ra_ide_api/src/join_lines.rs
@@ -13,7 +13,7 @@ pub fn join_lines(file: &SourceFile, range: TextRange) -> TextEdit {
     let range = if range.is_empty() {
         let syntax = file.syntax();
         let text = syntax.text().slice(range.start()..);
-        let pos = match text.find('\n') {
+        let pos = match text.find_char('\n') {
             None => return TextEditBuilder::default().finish(),
             Some(pos) => pos,
         };
diff --git a/crates/ra_ide_api/src/typing.rs b/crates/ra_ide_api/src/typing.rs
index 1747a529e..5a1cbcc49 100644
--- a/crates/ra_ide_api/src/typing.rs
+++ b/crates/ra_ide_api/src/typing.rs
@@ -75,7 +75,7 @@ pub fn on_eq_typed(file: &SourceFile, eq_offset: TextUnit) -> Option<TextEdit> {
         if expr_range.contains(eq_offset) && eq_offset != expr_range.start() {
             return None;
         }
-        if file.syntax().text().slice(eq_offset..expr_range.start()).contains('\n') {
+        if file.syntax().text().slice(eq_offset..expr_range.start()).contains_char('\n') {
             return None;
         }
     } else {
diff --git a/crates/ra_syntax/src/syntax_text.rs b/crates/ra_syntax/src/syntax_text.rs
index f8ddff48e..652cb7a1e 100644
--- a/crates/ra_syntax/src/syntax_text.rs
+++ b/crates/ra_syntax/src/syntax_text.rs
@@ -57,25 +57,15 @@ impl SyntaxText {
         }
     }
 
-    pub fn push_to(&self, buf: &mut String) {
-        self.for_each_chunk(|chunk| buf.push_str(chunk))
-    }
-
-    pub fn to_string(&self) -> String {
-        let mut buf = String::new();
-        self.push_to(&mut buf);
-        buf
-    }
-
     pub fn to_smol_string(&self) -> SmolStr {
         self.to_string().into()
     }
 
-    pub fn contains(&self, c: char) -> bool {
+    pub fn contains_char(&self, c: char) -> bool {
         self.try_for_each_chunk(|chunk| if chunk.contains(c) { Err(()) } else { Ok(()) }).is_err()
     }
 
-    pub fn find(&self, c: char) -> Option<TextUnit> {
+    pub fn find_char(&self, c: char) -> Option<TextUnit> {
         let mut acc: TextUnit = 0.into();
         let res = self.try_for_each_chunk(|chunk| {
             if let Some(pos) = chunk.find(c) {
@@ -158,7 +148,7 @@ impl fmt::Debug for SyntaxText {
 
 impl fmt::Display for SyntaxText {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::Display::fmt(&self.to_string(), f)
+        self.try_for_each_chunk(|chunk| fmt::Display::fmt(chunk, f))
     }
 }