From 7c9da2f5b5d494a0783384dcba2ce6455376e687 Mon Sep 17 00:00:00 2001
From: Joe Wilm <joe@jwilm.com>
Date: Thu, 10 May 2018 19:50:44 -0700
Subject: [PATCH] Remove Chain<Chain<Chain<Chain ...

Thanks, impl Trait!
---
 src/racer/matchers.rs | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/src/racer/matchers.rs b/src/racer/matchers.rs
index bfd522a0..12a287f6 100644
--- a/src/racer/matchers.rs
+++ b/src/racer/matchers.rs
@@ -7,7 +7,7 @@ use core::MatchType::{self, Let, Module, Function, Struct, Type, Trait, Enum, En
                       Const, Static, IfLet, WhileLet, For, Macro};
 use core::Namespace;
 use std::path::Path;
-use std::{iter, option, str, vec};
+use std::{str, vec};
 
 /// The location of an import (`use` item) currently being resolved.
 #[derive(PartialEq, Eq)]
@@ -20,15 +20,11 @@ pub struct PendingImport<'fp> {
 /// A stack of imports (`use` items) currently being resolved.
 pub type PendingImports<'stack, 'fp> = StackLinkedListNode<'stack, PendingImport<'fp>>;
 
-pub type MIter = option::IntoIter<Match>;
-pub type MChain<T> = iter::Chain<T, MIter>;
-
-// TODO change return type to `impl Iterator<Item = Match>`
 pub fn match_types(src: Src, blobstart: Point, blobend: Point,
                    searchstr: &str, filepath: &Path,
                    search_type: SearchType,
                    local: bool, session: &Session,
-                   pending_imports: &PendingImports) -> iter::Chain<MChain<MChain<MChain<MChain<MChain<MIter>>>>>, vec::IntoIter<Match>> {
+                   pending_imports: &PendingImports) -> impl Iterator<Item=Match> {
     let it = match_extern_crate(&src, blobstart, blobend, searchstr, filepath, search_type, session).into_iter();
     let it = it.chain(match_mod(src, blobstart, blobend, searchstr, filepath, search_type, local, session).into_iter());
     let it = it.chain(match_struct(&src, blobstart, blobend, searchstr, filepath, search_type, local).into_iter());
@@ -40,7 +36,7 @@ pub fn match_types(src: Src, blobstart: Point, blobend: Point,
 
 pub fn match_values(src: Src, blobstart: Point, blobend: Point,
                     searchstr: &str, filepath: &Path, search_type: SearchType,
-                    local: bool) -> MChain<MChain<MChain<MIter>>> {
+                    local: bool) -> impl Iterator<Item=Match> {
     let it = match_const(&src, blobstart, blobend, searchstr, filepath, search_type, local).into_iter();
     let it = it.chain(match_static(&src, blobstart, blobend, searchstr, filepath, search_type, local).into_iter());
     let it = it.chain(match_fn(&src, blobstart, blobend, searchstr, filepath, search_type, local).into_iter());