move debug_dump to fmt::Debug

crates/ra_syntax/src/fuzz.rs

@@ -52,9 +52,9 @@ impl CheckReparse {
             new_parse.tree().syntax().descendants().zip(full_reparse.tree().syntax().descendants())
         {
             if (a.kind(), a.range()) != (b.kind(), b.range()) {
-                eprint!("original:\n{}", parse.tree().syntax().debug_dump());
-                eprint!("reparsed:\n{}", new_parse.tree().syntax().debug_dump());
-                eprint!("full reparse:\n{}", full_reparse.tree().syntax().debug_dump());
+                eprint!("original:\n{:#?}", parse.tree().syntax());
+                eprint!("reparsed:\n{:#?}", new_parse.tree().syntax());
+                eprint!("full reparse:\n{:#?}", full_reparse.tree().syntax());
                 assert_eq!(
                     format!("{:?}", a),
                     format!("{:?}", b),

crates/ra_syntax/src/lib.rs

@@ -114,7 +114,7 @@ impl Parse<SyntaxNode> {
 
 impl Parse<SourceFile> {
     pub fn debug_dump(&self) -> String {
-        let mut buf = self.tree().syntax().debug_dump();
+        let mut buf = format!("{:#?}", self.tree().syntax());
         for err in self.errors.iter() {
             writeln!(buf, "error {:?}: {}", err.location(), err.kind()).unwrap();
         }

crates/ra_syntax/src/parsing/reparsing.rs

@@ -188,8 +188,8 @@ mod tests {
         };
 
         assert_eq_text!(
-            &fully_reparsed.tree().syntax().debug_dump(),
-            &incrementally_reparsed.tree().syntax().debug_dump(),
+            &format!("{:#?}", fully_reparsed.tree().syntax()),
+            &format!("{:#?}", incrementally_reparsed.tree().syntax()),
         );
     }
 

crates/ra_syntax/src/syntax_node.rs

@@ -6,11 +6,7 @@
 //! The *real* implementation is in the (language-agnostic) `rowan` crate, this
 //! modules just wraps its API.
 
-use std::{
-    fmt::{self, Write},
-    iter::successors,
-    ops::RangeInclusive,
-};
+use std::{fmt, iter::successors, ops::RangeInclusive};
 
 use ra_parser::ParseError;
 use rowan::GreenNodeBuilder;
@@ -36,8 +32,29 @@ pub enum InsertPosition<T> {
 pub struct SyntaxNode(pub(crate) rowan::cursor::SyntaxNode);
 
 impl fmt::Debug for SyntaxNode {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        write!(fmt, "{:?}@{:?}", self.kind(), self.range())
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        if f.alternate() {
+            let mut level = 0;
+            for event in self.preorder_with_tokens() {
+                match event {
+                    WalkEvent::Enter(element) => {
+                        for _ in 0..level {
+                            write!(f, "  ")?;
+                        }
+                        match element {
+                            SyntaxElement::Node(node) => writeln!(f, "{:?}", node)?,
+                            SyntaxElement::Token(token) => writeln!(f, "{:?}", token)?,
+                        }
+                        level += 1;
+                    }
+                    WalkEvent::Leave(_) => level -= 1,
+                }
+            }
+            assert_eq!(level, 0);
+            Ok(())
+        } else {
+            write!(f, "{:?}@{:?}", self.kind(), self.range())
+        }
     }
 }
 
@@ -173,31 +190,6 @@ impl SyntaxNode {
         })
     }
 
-    pub fn debug_dump(&self) -> String {
-        let mut level = 0;
-        let mut buf = String::new();
-
-        for event in self.preorder_with_tokens() {
-            match event {
-                WalkEvent::Enter(element) => {
-                    for _ in 0..level {
-                        buf.push_str("  ");
-                    }
-                    match element {
-                        SyntaxElement::Node(node) => writeln!(buf, "{:?}", node).unwrap(),
-                        SyntaxElement::Token(token) => writeln!(buf, "{:?}", token).unwrap(),
-                    }
-                    level += 1;
-                }
-                WalkEvent::Leave(_) => level -= 1,
-            }
-        }
-
-        assert_eq!(level, 0);
-
-        buf
-    }
-
     pub(crate) fn replace_with(&self, replacement: GreenNode) -> GreenNode {
         self.0.replace_with(replacement)
     }

crates/ra_syntax/src/validation.rs

@@ -89,9 +89,9 @@ pub(crate) fn validate_block_structure(root: &SyntaxNode) {
                     assert_eq!(
                         node.parent(),
                         pair.parent(),
-                        "\nunpaired curleys:\n{}\n{}\n",
+                        "\nunpaired curleys:\n{}\n{:#?}\n",
                         root.text(),
-                        root.debug_dump(),
+                        root,
                     );
                     assert!(
                         node.next_sibling().is_none() && pair.prev_sibling().is_none(),