5 files changed, 28 insertions, 22 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 2c03d0b75..92a377497 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -874,6 +874,14 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "once_cell"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "parking_lot 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "opaque-debug"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1039,7 +1047,7 @@ dependencies = [
  "arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "join_to_string 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "once_cell 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ra_db 0.1.0",
  "ra_fmt 0.1.0",
  "ra_hir 0.1.0",
@@ -1209,7 +1217,7 @@ dependencies = [
 name = "ra_prof"
 version = "0.1.0"
 dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "once_cell 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2121,6 +2129,7 @@ dependencies = [
 "checksum num_cpus 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1a23f0ed30a54abaa0c7e83b1d2d87ada7c3c23078d1d87815af3e3b6385fbba"
 "checksum number_prefix 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "dbf9993e59c894e3c08aa1c2712914e9e6bf1fcbfc6bef283e2183df345a4fee"
 "checksum numtoa 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b8f8bdf33df195859076e54ab11ee78a1b208382d3a26ec40d142ffc1ecc49ef"
+"checksum once_cell 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e7a15c6c8c034b56d2f01b23b98cdbbb622f8de99efad0d93d8ea0e608b36a7e"
 "checksum opaque-debug 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "93f5bb2e8e8dec81642920ccff6b61f1eb94fa3020c5a325c9851ff604152409"
 "checksum ordermap 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "a86ed3f5f244b372d6b1a00b72ef7f8876d0bc6a78a4c9985c53614041512063"
 "checksum owning_ref 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "49a4b8ea2179e6a2e27411d3bca09ca6dd630821cf6894c6c7c8467a8ee7ef13"
diff --git a/crates/ra_assists/Cargo.toml b/crates/ra_assists/Cargo.toml
index 29d9ceb59..5ddac1e48 100644
--- a/crates/ra_assists/Cargo.toml
+++ b/crates/ra_assists/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 authors = ["rust-analyzer developers"]
 
 [dependencies]
-lazy_static = "1.3.0"
+once_cell = "0.2.0"
 join_to_string = "0.1.3"
 itertools = "0.8.0"
 arrayvec = "0.4.10"
diff --git a/crates/ra_assists/src/ast_editor.rs b/crates/ra_assists/src/ast_editor.rs
index 726e5c0a3..aa7aeaabb 100644
--- a/crates/ra_assists/src/ast_editor.rs
+++ b/crates/ra_assists/src/ast_editor.rs
@@ -289,12 +289,10 @@ fn ast_node_from_file_text<N: AstNode>(text: &str) -> TreeArc<N> {
 }
 
 mod tokens {
-    use lazy_static::lazy_static;
+    use once_cell::sync::Lazy;
     use ra_syntax::{AstNode, SourceFile, TreeArc, SyntaxToken, SyntaxKind::*};
 
-    lazy_static! {
-        static ref SOURCE_FILE: TreeArc<SourceFile> = SourceFile::parse(",\n; ;");
-    }
+    static SOURCE_FILE: Lazy<TreeArc<SourceFile>> = Lazy::new(|| SourceFile::parse(",\n; ;"));
 
     pub(crate) fn comma() -> SyntaxToken<'static> {
         SOURCE_FILE
diff --git a/crates/ra_prof/Cargo.toml b/crates/ra_prof/Cargo.toml
index 19ce21783..5f23e865c 100644
--- a/crates/ra_prof/Cargo.toml
+++ b/crates/ra_prof/Cargo.toml
@@ -6,4 +6,4 @@ authors = ["rust-analyzer developers"]
 publish = false
 
 [dependencies]
-lazy_static = "1.3.0"
\ No newline at end of file
+once_cell = "0.2.0"
diff --git a/crates/ra_prof/src/lib.rs b/crates/ra_prof/src/lib.rs
index 9ecb8e744..e56446c9f 100644
--- a/crates/ra_prof/src/lib.rs
+++ b/crates/ra_prof/src/lib.rs
@@ -1,13 +1,14 @@
-use std::cell::RefCell;
-use std::time::{Duration, Instant};
-use std::mem;
-use std::io::{stderr, Write};
-use std::iter::repeat;
-use std::collections::{HashSet};
-use std::default::Default;
-use std::iter::FromIterator;
-use std::sync::{RwLock, atomic::{AtomicBool, Ordering}};
-use lazy_static::lazy_static;
+use std::{
+    cell::RefCell,
+    time::{Duration, Instant},
+    mem,
+    io::{stderr, Write},
+    iter::repeat,
+    collections::HashSet,
+    sync::{RwLock, atomic::{AtomicBool, Ordering}},
+};
+
+use once_cell::sync::Lazy;
 
 /// Set profiling filter. It specifies descriptions allowed to profile.
 /// This is helpful when call stack has too many nested profiling scopes.
@@ -21,7 +22,7 @@ use lazy_static::lazy_static;
 /// ```
 pub fn set_filter(f: Filter) {
     PROFILING_ENABLED.store(f.depth > 0, Ordering::SeqCst);
-    let set = HashSet::from_iter(f.allowed.iter().cloned());
+    let set: HashSet<_> = f.allowed.iter().cloned().collect();
     let mut old = FILTER.write().unwrap();
     let filter_data = FilterData {
         depth: f.depth,
@@ -161,9 +162,7 @@ struct FilterData {
 
 static PROFILING_ENABLED: AtomicBool = AtomicBool::new(false);
 
-lazy_static! {
-    static ref FILTER: RwLock<FilterData> = RwLock::new(Default::default());
-}
+static FILTER: Lazy<RwLock<FilterData>> = Lazy::new(Default::default);
 
 thread_local!(static PROFILE_STACK: RefCell<ProfileStack> = RefCell::new(ProfileStack::new()));