8 files changed, 64 insertions, 76 deletions

diff --git a/src/parser/event_parser/grammar/attributes.rs b/src/parser/event_parser/grammar/attributes.rs
index 045840059..8bf04afce 100644
--- a/src/parser/event_parser/grammar/attributes.rs
+++ b/src/parser/event_parser/grammar/attributes.rs
@@ -12,8 +12,7 @@ pub(super) fn outer_attributes(p: &mut Parser) {
     }
 }
 
-
-fn attribute(p: &mut Parser, inner: bool){
+fn attribute(p: &mut Parser, inner: bool) {
     let attr = p.start();
     assert!(p.at(POUND));
     p.bump();
@@ -38,9 +37,7 @@ fn meta_item(p: &mut Parser) {
             EQ => {
                 p.bump();
                 if !expressions::literal(p) {
-                    p.error()
-                        .message("expected literal")
-                        .emit();
+                    p.error().message("expected literal").emit();
                 }
             }
             L_PAREN => meta_item_arg_list(p),
@@ -48,9 +45,7 @@ fn meta_item(p: &mut Parser) {
         }
         meta_item.complete(p, META_ITEM);
     } else {
-        p.error()
-            .message("expected attribute value")
-            .emit()
+        p.error().message("expected attribute value").emit()
     }
 }
 
@@ -73,8 +68,8 @@ fn meta_item_arg_list(p: &mut Parser) {
                 p.error().message(message).emit();
                 p.bump();
                 err.complete(p, ERROR);
-                continue
-            }
+                continue;
+            },
         }
         if !p.at(R_PAREN) {
             p.expect(COMMA);
diff --git a/src/parser/event_parser/grammar/expressions.rs b/src/parser/event_parser/grammar/expressions.rs
index a943b8c81..c81dc6c35 100644
--- a/src/parser/event_parser/grammar/expressions.rs
+++ b/src/parser/event_parser/grammar/expressions.rs
@@ -2,15 +2,13 @@ use super::*;
 
 pub(super) fn literal(p: &mut Parser) -> bool {
     match p.current() {
-        TRUE_KW | FALSE_KW |
-        INT_NUMBER | FLOAT_NUMBER |
-        BYTE | CHAR |
-        STRING | RAW_STRING | BYTE_STRING | RAW_BYTE_STRING => {
+        TRUE_KW | FALSE_KW | INT_NUMBER | FLOAT_NUMBER | BYTE | CHAR | STRING | RAW_STRING
+        | BYTE_STRING | RAW_BYTE_STRING => {
             let lit = p.start();
             p.bump();
             lit.complete(p, LITERAL);
             true
         }
-        _ => false
+        _ => false,
     }
 }
diff --git a/src/parser/event_parser/grammar/items.rs b/src/parser/event_parser/grammar/items.rs
index 7706690cc..e569e5047 100644
--- a/src/parser/event_parser/grammar/items.rs
+++ b/src/parser/event_parser/grammar/items.rs
@@ -7,15 +7,8 @@ pub(super) fn mod_contents(p: &mut Parser) {
     }
 }
 
-pub(super) const ITEM_FIRST: TokenSet = token_set![
-    EXTERN_KW,
-    MOD_KW,
-    USE_KW,
-    STRUCT_KW,
-    FN_KW,
-    PUB_KW,
-    POUND,
-];
+pub(super) const ITEM_FIRST: TokenSet =
+    token_set![EXTERN_KW, MOD_KW, USE_KW, STRUCT_KW, FN_KW, PUB_KW, POUND,];
 
 fn item(p: &mut Parser) {
     let item = p.start();
@@ -48,7 +41,7 @@ fn item(p: &mut Parser) {
             let message = if err_token == SEMI {
                 //TODO: if the item is incomplete, this message is misleading
                 "expected item, found `;`\n\
-                consider removing this semicolon"
+                 consider removing this semicolon"
             } else {
                 "expected item"
             };
@@ -76,10 +69,9 @@ fn struct_item(p: &mut Parser) {
                     return;
                 }
                 L_CURLY => named_fields(p),
-                _ => { //TODO: special case `(` error message
-                    p.error()
-                        .message("expected `;` or `{`")
-                        .emit();
+                _ => {
+                    //TODO: special case `(` error message
+                    p.error().message("expected `;` or `{`").emit();
                     return;
                 }
             }
@@ -94,9 +86,7 @@ fn struct_item(p: &mut Parser) {
             p.expect(SEMI);
         }
         _ => {
-            p.error()
-                .message("expected `;`, `{`, or `(`")
-                .emit();
+            p.error().message("expected `;`, `{`, or `(`").emit();
             return;
         }
     }
@@ -177,7 +167,7 @@ fn use_item(p: &mut Parser) {
     use_tree(p);
     p.expect(SEMI);
 
-    fn use_tree(p: &mut Parser){
+    fn use_tree(p: &mut Parser) {
         let la = p.raw_lookahead(1);
         let m = p.start();
         match (p.current(), la) {
@@ -209,9 +199,7 @@ fn use_item(p: &mut Parser) {
                             L_CURLY => nested_trees(p),
                             _ => {
                                 // is this unreachable?
-                                p.error()
-                                    .message("expected `{` or `*`")
-                                    .emit();
+                                p.error().message("expected `{` or `*`").emit();
                             }
                         }
                     }
@@ -222,7 +210,7 @@ fn use_item(p: &mut Parser) {
                 m.abandon(p);
                 p.err_and_bump("expected one of `*`, `::`, `{`, `self`, `super`, `indent`");
                 return;
-            },
+            }
         }
         m.complete(p, USE_TREE);
     }
@@ -240,13 +228,9 @@ fn use_item(p: &mut Parser) {
     }
 }
 
-
 fn fn_item(p: &mut Parser) {
     assert!(p.at(FN_KW));
     p.bump();
 
-    p.expect(IDENT) && p.expect(L_PAREN) && p.expect(R_PAREN)
-        && p.curly_block(|_| ());
+    p.expect(IDENT) && p.expect(L_PAREN) && p.expect(R_PAREN) && p.curly_block(|_| ());
 }
-
-
diff --git a/src/parser/event_parser/grammar/mod.rs b/src/parser/event_parser/grammar/mod.rs
index 6e4f72096..c6ab1fbe2 100644
--- a/src/parser/event_parser/grammar/mod.rs
+++ b/src/parser/event_parser/grammar/mod.rs
@@ -1,5 +1,5 @@
 use super::parser::{Parser, TokenSet};
-use {SyntaxKind};
+use SyntaxKind;
 use tree::EOF;
 use syntax_kinds::*;
 
@@ -29,7 +29,7 @@ fn visibility(p: &mut Parser) {
                     }
                     p.expect(R_PAREN);
                 }
-                _ => ()
+                _ => (),
             }
         }
         vis.complete(p, VISIBILITY);
@@ -53,9 +53,7 @@ impl<'p> Parser<'p> {
 
     fn err_and_bump(&mut self, message: &str) {
         let err = self.start();
-        self.error()
-            .message(message)
-            .emit();
+        self.error().message(message).emit();
         self.bump();
         err.complete(self, ERROR);
     }
@@ -65,15 +63,16 @@ impl<'p> Parser<'p> {
             self.bump();
             true
         } else {
-            self.error()
-                .message(format!("expected {:?}", kind))
-                .emit();
+            self.error().message(format!("expected {:?}", kind)).emit();
             false
         }
     }
 
     fn eat(&mut self, kind: SyntaxKind) -> bool {
-        self.current() == kind && { self.bump(); true }
+        self.current() == kind && {
+            self.bump();
+            true
+        }
     }
 }
 
@@ -94,8 +93,7 @@ impl Lookahead for SyntaxKind {
 
 impl Lookahead for [SyntaxKind; 2] {
     fn is_ahead(self, p: &Parser) -> bool {
-        p.current() == self[0]
-        && p.raw_lookahead(1) == self[1]
+        p.current() == self[0] && p.raw_lookahead(1) == self[1]
     }
 
     fn consume(p: &mut Parser) {
@@ -106,9 +104,7 @@ impl Lookahead for [SyntaxKind; 2] {
 
 impl Lookahead for [SyntaxKind; 3] {
     fn is_ahead(self, p: &Parser) -> bool {
-        p.current() == self[0]
-        && p.raw_lookahead(1) == self[1]
-        && p.raw_lookahead(2) == self[2]
+        p.current() == self[0] && p.raw_lookahead(1) == self[1] && p.raw_lookahead(2) == self[2]
     }
 
     fn consume(p: &mut Parser) {
@@ -130,5 +126,4 @@ impl<'a> Lookahead for AnyOf<'a> {
     fn consume(p: &mut Parser) {
         p.bump();
     }
-
 }
diff --git a/src/parser/event_parser/grammar/paths.rs b/src/parser/event_parser/grammar/paths.rs
index b58c59aef..4e028073a 100644
--- a/src/parser/event_parser/grammar/paths.rs
+++ b/src/parser/event_parser/grammar/paths.rs
@@ -34,9 +34,7 @@ fn path_segment(p: &mut Parser, first: bool) {
             p.bump();
         }
         _ => {
-            p.error()
-                .message("expected identifier")
-                .emit();
+            p.error().message("expected identifier").emit();
         }
     };
     segment.complete(p, PATH_SEGMENT);
diff --git a/src/parser/event_parser/grammar/types.rs b/src/parser/event_parser/grammar/types.rs
index c431643d7..1a3d44a0a 100644
--- a/src/parser/event_parser/grammar/types.rs
+++ b/src/parser/event_parser/grammar/types.rs
@@ -2,4 +2,4 @@ use super::*;
 
 pub(super) fn type_ref(p: &mut Parser) {
     p.expect(IDENT);
-}
\ No newline at end of file
+}
diff --git a/src/parser/event_parser/mod.rs b/src/parser/event_parser/mod.rs
index b9ffded9d..65aea017b 100644
--- a/src/parser/event_parser/mod.rs
+++ b/src/parser/event_parser/mod.rs
@@ -1,4 +1,4 @@
-use {Token, SyntaxKind};
+use {SyntaxKind, Token};
 
 #[macro_use]
 mod parser;
diff --git a/src/parser/event_parser/parser.rs b/src/parser/event_parser/parser.rs
index 18231e493..5ba3071cb 100644
--- a/src/parser/event_parser/parser.rs
+++ b/src/parser/event_parser/parser.rs
@@ -1,17 +1,19 @@
-use {Token, SyntaxKind, TextUnit};
+use {SyntaxKind, TextUnit, Token};
 use super::Event;
 use super::super::is_insignificant;
-use syntax_kinds::{L_CURLY, R_CURLY, ERROR};
+use syntax_kinds::{ERROR, L_CURLY, R_CURLY};
 use tree::{EOF, TOMBSTONE};
 
 pub(crate) struct Marker {
-    pos: u32
+    pos: u32,
 }
 
 impl Marker {
     pub fn complete(self, p: &mut Parser, kind: SyntaxKind) -> CompleteMarker {
         match self.event(p) {
-            &mut Event::Start { kind: ref mut slot, ..} => {
+            &mut Event::Start {
+                kind: ref mut slot, ..
+            } => {
                 *slot = kind;
             }
             _ => unreachable!(),
@@ -26,8 +28,11 @@ impl Marker {
         let idx = self.pos as usize;
         if idx == p.events.len() - 1 {
             match p.events.pop() {
-                Some(Event::Start { kind: TOMBSTONE, forward_parent: None }) => (),
-                _ => unreachable!()
+                Some(Event::Start {
+                    kind: TOMBSTONE,
+                    forward_parent: None,
+                }) => (),
+                _ => unreachable!(),
             }
         }
         ::std::mem::forget(self);
@@ -51,14 +56,17 @@ impl Drop for Marker {
 }
 
 pub(crate) struct CompleteMarker {
-    pos: u32
+    pos: u32,
 }
 
 impl CompleteMarker {
     pub(crate) fn precede(self, p: &mut Parser) -> Marker {
         let m = p.start();
         match p.events[self.pos as usize] {
-            Event::Start { ref mut forward_parent, ..} => {
+            Event::Start {
+                ref mut forward_parent,
+                ..
+            } => {
                 *forward_parent = Some(m.pos - self.pos);
             }
             _ => unreachable!(),
@@ -68,7 +76,7 @@ impl CompleteMarker {
 }
 
 pub(crate) struct TokenSet {
-    pub tokens: &'static [SyntaxKind]
+    pub tokens: &'static [SyntaxKind],
 }
 
 impl TokenSet {
@@ -90,7 +98,6 @@ macro_rules! token_set {
     };
 }
 
-
 pub(crate) struct Parser<'t> {
     #[allow(unused)]
     text: &'t str,
@@ -150,8 +157,13 @@ impl<'t> Parser<'t> {
     }
 
     pub(crate) fn start(&mut self) -> Marker {
-        let m = Marker { pos: self.events.len() as u32 };
-        self.event(Event::Start { kind: TOMBSTONE, forward_parent: None });
+        let m = Marker {
+            pos: self.events.len() as u32,
+        };
+        self.event(Event::Start {
+            kind: TOMBSTONE,
+            forward_parent: None,
+        });
         m
     }
 
@@ -168,7 +180,10 @@ impl<'t> Parser<'t> {
             _ => (),
         }
         self.pos += 1;
-        self.event(Event::Token { kind, n_raw_tokens: 1 });
+        self.event(Event::Token {
+            kind,
+            n_raw_tokens: 1,
+        });
         kind
     }
 
@@ -210,7 +225,10 @@ pub(crate) struct ErrorBuilder<'p, 't: 'p> {
 
 impl<'t, 'p> ErrorBuilder<'p, 't> {
     fn new(parser: &'p mut Parser<'t>) -> Self {
-        ErrorBuilder { message: None, parser }
+        ErrorBuilder {
+            message: None,
+            parser,
+        }
     }
 
     pub fn message<M: Into<String>>(mut self, m: M) -> Self {