Use if_chain as reminder for rust-lang/rust#53667

Cargo.toml

@@ -9,6 +9,7 @@ edition = '2021'
 duration-str = '*'
 enigo = { version = '*', default-features = false, features = ['serde', 'wayland'] }
 gilrs = { version = '*', features = ['serde'] }
+if_chain = '*'
 lazy_static = '*'
 serde = '*'
 shlex = '*'

src/config.rs

@@ -2,6 +2,7 @@ use std::collections::HashMap;
 use std::time::Duration;
 
 use duration_str::deserialize_duration;
+use if_chain::if_chain;
 
 #[derive(Debug, serde::Deserialize)]
 #[serde(rename_all = "snake_case")]
@@ -49,8 +50,10 @@ impl Config {
             return Err("Trigger zone smaller than dead zone");
         }
 
-        if let Some(activator) = &self.alternative_activator {
-            if self.main.contains_key(activator) {
+        if_chain! {
+            if let Some(activator) = &self.alternative_activator;
+            if self.main.contains_key(activator);
+            then {
                 return Err("Activator for alternative set is remapped");
             }
         }

src/main.rs

@@ -5,6 +5,7 @@ use std::sync::atomic::{AtomicBool, Ordering};
 
 use enigo::{Direction, Enigo, Keyboard, Mouse};
 use gilrs::{Axis, Event, EventType, Gilrs};
+use if_chain::if_chain;
 use lazy_static::lazy_static;
 
 use crate::atomic_f32::AtomicF32;
@@ -45,8 +46,10 @@ lazy_static! {
 }
 
 fn press_input(input_name: &str, is_press_down: bool) {
-    if let Some(activator) = &CONFIG.alternative_activator {
-        if input_name == activator.as_ref() {
+    if_chain! {
+        if let Some(activator) = &CONFIG.alternative_activator;
+        if input_name == activator.as_ref();
+        then {
             IS_ALTERNATIVE_ACTIVE.store(is_press_down, Ordering::Relaxed);
             return;
         }
@@ -110,11 +113,12 @@ fn press_input(input_name: &str, is_press_down: bool) {
                     .unwrap();
             }
             Remap::Command(cmdline) => {
-                if is_press_down {
-                    if let Some(components) = shlex::split(cmdline) {
-                        if !components.is_empty() {
-                            std::process::Command::new(&components[0]).args(&components[1..]).spawn().unwrap();
-                        }
+                if_chain! {
+                    if is_press_down;
+                    if let Some(components) = shlex::split(cmdline);
+                    if !components.is_empty();
+                    then {
+                        std::process::Command::new(&components[0]).args(&components[1..]).spawn().unwrap();
                     }
                 }
             }