Swap out lazy_static for std::sync::LazyLock

Author: robbert-vdh

CHANGELOG.md

@@ -10,6 +10,13 @@ Since there is no stable release yet, the changes are organized per day in
 reverse chronological order. The main purpose of this document in its current
 state is to list breaking changes.
 
+## [2024-08-18]
+
+### Breaking changes
+
+- The minimum supported Rust version has been bumped to 1.80 to replace the last
+  uses of `lazy_static` with `std::sync::LazyLock`.
+
 ## [2024-05-05]
 
 ### Breaking changes

Cargo.lock

@@ -2,7 +2,7 @@
 name = "nih_plug"
 version = "0.0.0"
 edition = "2021"
-rust-version = "1.70"
+rust-version = "1.80"
 authors = ["Robbert van der Helm <[email protected]>"]
 license = "ISC"
 
@@ -85,7 +85,6 @@ cfg-if = "1.0"
 # This supports CLAP 1.1.8
 clap-sys = {  git = "https://github.com/robbert-vdh/clap-sys.git", branch = "feature/cstr-macro" }
 crossbeam = "0.8"
-lazy_static = "1.4"
 log = { version = "0.4", features = ["std", "release_max_level_info"] }
 midi-consts = "0.1"
 nih_log = "0.3.1"

Cargo.toml

@@ -21,7 +21,6 @@ raw-window-handle = "0.5"
 baseview = { git = "https://github.com/RustAudio/baseview.git", rev = "45465c5f46abed6c6ce370fffde5edc8e4cd5aa3" }
 crossbeam = "0.8"
 egui-baseview = { git = "https://github.com/BillyDM/egui-baseview.git", rev = "68c4d0e8e5c1c702a888a245f4ac50eddfdfcaed", default-features = false }
-lazy_static = "1.4"
 parking_lot = "0.12"
 # To make the state persistable
 serde = { version = "1.0", features = ["derive"] }

nih_plug_egui/Cargo.toml

@@ -1,10 +1,9 @@
-use std::sync::Arc;
+use std::sync::{Arc, LazyLock};
 
 use egui_baseview::egui::{
     self, emath, vec2, Key, Response, Sense, Stroke, TextEdit, TextStyle, Ui, Vec2, Widget,
     WidgetText,
 };
-use lazy_static::lazy_static;
 use nih_plug::prelude::{Param, ParamSetter};
 use parking_lot::Mutex;
 
@@ -14,11 +13,10 @@ use super::util;
 /// noramlized parameter.
 const GRANULAR_DRAG_MULTIPLIER: f32 = 0.0015;
 
-lazy_static! {
-    static ref DRAG_NORMALIZED_START_VALUE_MEMORY_ID: egui::Id = egui::Id::new((file!(), 0));
-    static ref DRAG_AMOUNT_MEMORY_ID: egui::Id = egui::Id::new((file!(), 1));
-    static ref VALUE_ENTRY_MEMORY_ID: egui::Id = egui::Id::new((file!(), 2));
-}
+static DRAG_NORMALIZED_START_VALUE_MEMORY_ID: LazyLock<egui::Id> =
+    LazyLock::new(|| egui::Id::new((file!(), 0)));
+static DRAG_AMOUNT_MEMORY_ID: LazyLock<egui::Id> = LazyLock::new(|| egui::Id::new((file!(), 1)));
+static VALUE_ENTRY_MEMORY_ID: LazyLock<egui::Id> = LazyLock::new(|| egui::Id::new((file!(), 2)));
 
 /// A slider widget similar to [`egui::widgets::Slider`] that knows about NIH-plug parameters ranges
 /// and can get values for it. The slider supports double click and control click to reset,

nih_plug_egui/src/widgets/param_slider.rs

@@ -6,7 +6,7 @@
 use anymap::Entry;
 use crossbeam::channel;
 use parking_lot::Mutex;
-use std::sync::{Arc, Weak};
+use std::sync::{Arc, LazyLock, Weak};
 use std::thread::{self, JoinHandle};
 
 use super::MainThreadExecutor;
@@ -73,10 +73,8 @@ where
 // Rust does not allow us to use the `T` and `E` type variable in statics, so this is a
 // workaround to have a singleton that also works if for whatever reason there arem ultiple `T`
 // and `E`s in a single process (won't happen with normal plugin usage, but sho knwos).
-lazy_static::lazy_static! {
-    static ref HANDLE_MAP: Mutex<anymap::Map<dyn std::any::Any + Send>> =
-        Mutex::new(anymap::Map::new());
-}
+static HANDLE_MAP: LazyLock<Mutex<anymap::Map<dyn std::any::Any + Send>>> =
+    LazyLock::new(|| Mutex::new(anymap::Map::new()));
 
 impl<T: Send + 'static, E: MainThreadExecutor<T> + 'static> WorkerThread<T, E> {
     fn spawn() -> Self {

src/event_loop/background_thread.rs

@@ -14,7 +14,6 @@ pub use clap_sys::factory::plugin_factory::{clap_plugin_factory, CLAP_PLUGIN_FAC
 pub use clap_sys::host::clap_host;
 pub use clap_sys::plugin::{clap_plugin, clap_plugin_descriptor};
 pub use clap_sys::version::CLAP_VERSION;
-pub use lazy_static::lazy_static;
 
 /// Export one or more CLAP plugins from this library using the provided plugin types.
 #[macro_export]