move abstract traits to top

crates/ra_syntax/src/parsing/parser_impl/input.rs

@@ -1,22 +1,21 @@
 use crate::{
     SyntaxKind, SyntaxKind::EOF, TextRange, TextUnit,
     parsing::{
+        TokenPos,
         parser_impl::TokenSource,
         lexer::Token,
     },
 };
 
-use std::ops::{Add, AddAssign};
-
 impl<'t> TokenSource for ParserInput<'t> {
-    fn token_kind(&self, pos: InputPosition) -> SyntaxKind {
+    fn token_kind(&self, pos: TokenPos) -> SyntaxKind {
         let idx = pos.0 as usize;
         if !(idx < self.tokens.len()) {
             return EOF;
         }
         self.tokens[idx].kind
     }
-    fn is_token_joint_to_next(&self, pos: InputPosition) -> bool {
+    fn is_token_joint_to_next(&self, pos: TokenPos) -> bool {
         let idx_curr = pos.0 as usize;
         let idx_next = pos.0 as usize;
         if !(idx_next < self.tokens.len()) {
@@ -24,7 +23,7 @@ impl<'t> TokenSource for ParserInput<'t> {
         }
         self.start_offsets[idx_curr] + self.tokens[idx_curr].len == self.start_offsets[idx_next]
     }
-    fn is_keyword(&self, pos: InputPosition, kw: &str) -> bool {
+    fn is_keyword(&self, pos: TokenPos, kw: &str) -> bool {
         let idx = pos.0 as usize;
         if !(idx < self.tokens.len()) {
             return false;
@@ -72,26 +71,3 @@ impl<'t> ParserInput<'t> {
         ParserInput { text, start_offsets, tokens }
     }
 }
-
-#[derive(Copy, Clone, Ord, PartialOrd, Eq, PartialEq)]
-pub(crate) struct InputPosition(u32);
-
-impl InputPosition {
-    pub fn new() -> Self {
-        InputPosition(0)
-    }
-}
-
-impl Add<u32> for InputPosition {
-    type Output = InputPosition;
-
-    fn add(self, rhs: u32) -> InputPosition {
-        InputPosition(self.0 + rhs)
-    }
-}
-
-impl AddAssign<u32> for InputPosition {
-    fn add_assign(&mut self, rhs: u32) {
-        self.0 += rhs
-    }
-}