refactor: simplify iterator usage (#3017)

src/config.rs

@@ -141,7 +141,7 @@ where
     fn from_config(config: &'a Value) -> Option<Self> {
         let mut hm = Self::default();
 
-        for (x, y) in config.as_table()?.iter() {
+        for (x, y) in config.as_table()? {
             hm.insert(x.clone(), T::from_config(y)?);
         }
 
@@ -157,7 +157,7 @@ where
     fn from_config(config: &'a Value) -> Option<Self> {
         let mut im = Self::default();
 
-        for (x, y) in config.as_table()?.iter() {
+        for (x, y) in config.as_table()? {
             im.insert(x.clone(), T::from_config(y)?);
         }
 

src/configs/starship_root.rs

@@ -122,7 +122,7 @@ impl<'a> ModuleConfig<'a> for StarshipRootConfig<'a> {
                             "env_var",
                         ]
                         .iter()
-                        .chain(ALL_MODULES.iter())
+                        .chain(ALL_MODULES)
                         .filter_map(|field| {
                             let score = strsim::jaro_winkler(unknown, field);
                             (score > 0.8).then(|| (score, field))

src/modules/directory.rs

@@ -253,7 +253,7 @@ fn real_path<P: AsRef<Path>>(path: P) -> PathBuf {
 /// substitutions, in order, on the path. Any non-pair of strings is ignored.
 fn substitute_path(dir_string: String, substitutions: &IndexMap<String, &str>) -> String {
     let mut substituted_dir = dir_string;
-    for substitution_pair in substitutions.iter() {
+    for substitution_pair in substitutions {
         substituted_dir = substituted_dir.replace(substitution_pair.0, substitution_pair.1);
     }
     substituted_dir

src/modules/dotnet.rs

@@ -186,7 +186,7 @@ fn try_find_nearby_global_json(current_dir: &Path, repo_root: Option<&Path>) ->
     // Check the parent directory, or otherwise the repository root, for a global.json
     let mut check_dirs = parent_dir
         .iter()
-        .chain(repo_root.iter())
+        .chain(&repo_root)
         .copied() // Copies the reference, not the Path itself
         .collect::<Vec<&Path>>();
 

src/modules/kubernetes.rs

@@ -429,7 +429,7 @@ users: []
             .path(dir.path())
             .env(
                 "KUBECONFIG",
-                env::join_paths([&filename_cc, &filename_ctx].iter())
+                env::join_paths([&filename_cc, &filename_ctx])
                     .unwrap()
                     .to_string_lossy(),
             )
@@ -444,7 +444,7 @@ users: []
             .path(dir.path())
             .env(
                 "KUBECONFIG",
-                env::join_paths([&filename_ctx, &filename_cc].iter())
+                env::join_paths([&filename_ctx, &filename_cc])
                     .unwrap()
                     .to_string_lossy(),
             )

src/modules/status.rs

@@ -287,7 +287,7 @@ mod tests {
             None,
         ];
 
-        for (status, name) in exit_values.iter().zip(exit_values_name.iter()) {
+        for (status, name) in exit_values.iter().zip(&exit_values_name) {
             let expected = name.map(std::string::ToString::to_string);
             let actual = ModuleRenderer::new("status")
                 .config(toml::toml! {
@@ -314,7 +314,7 @@ mod tests {
             None,
         ];
 
-        for (status, name) in exit_values.iter().zip(exit_values_name.iter()) {
+        for (status, name) in exit_values.iter().zip(&exit_values_name) {
             let expected = name.map(std::string::ToString::to_string);
             let actual = ModuleRenderer::new("status")
                 .config(toml::toml! {
@@ -343,7 +343,7 @@ mod tests {
             Some("-3"),
         ];
 
-        for (status, name) in exit_values.iter().zip(exit_values_name.iter()) {
+        for (status, name) in exit_values.iter().zip(&exit_values_name) {
             let expected = name.map(std::string::ToString::to_string);
             let actual = ModuleRenderer::new("status")
                 .config(toml::toml! {
@@ -362,7 +362,7 @@ mod tests {
         let exit_values = [1, 126, 127, 130, 131];
         let exit_values_name = ["🔴", "🚫", "🔍", "🧱", "⚡"];
 
-        for (status, name) in exit_values.iter().zip(exit_values_name.iter()) {
+        for (status, name) in exit_values.iter().zip(&exit_values_name) {
             let expected = Some((*name).to_string());
             let actual = ModuleRenderer::new("status")
                 .config(toml::toml! {
@@ -388,7 +388,7 @@ mod tests {
         let exit_values = [1, 126, 127, 130, 131];
         let exit_values_name = ["🔴", "🚫", "🔍", "🔴", "🔴"];
 
-        for (status, name) in exit_values.iter().zip(exit_values_name.iter()) {
+        for (status, name) in exit_values.iter().zip(&exit_values_name) {
             let expected = Some((*name).to_string());
             let actual = ModuleRenderer::new("status")
                 .config(toml::toml! {
@@ -424,7 +424,7 @@ mod tests {
             "PSF 🔴=🔴 🔴 🔴",
         ];
 
-        for (status, rendered) in exit_values.iter().zip(exit_values_rendered.iter()) {
+        for (status, rendered) in exit_values.iter().zip(&exit_values_rendered) {
             let main_exit_code = status[0];
             let pipe_exit_code = &status[1..];
 
@@ -468,7 +468,7 @@ mod tests {
             "PSF 🔴=🔴1 🔴1 🔴1",
         ];
 
-        for (status, rendered) in exit_values.iter().zip(exit_values_rendered.iter()) {
+        for (status, rendered) in exit_values.iter().zip(&exit_values_rendered) {
             let main_exit_code = status[0];
             let pipe_exit_code = &status[1..];
 
@@ -521,7 +521,7 @@ mod tests {
         let exit_values = [[130, 126, 131, 127], [1, 1, 1, 1]];
         let exit_values_rendered = ["F 🧱", "F 🔴"];
 
-        for (status, rendered) in exit_values.iter().zip(exit_values_rendered.iter()) {
+        for (status, rendered) in exit_values.iter().zip(&exit_values_rendered) {
             let main_exit_code = status[0];
             let pipe_exit_code = &status[1..];
 
@@ -561,7 +561,7 @@ mod tests {
             "PSF 1ERROR=🟢|🟢|🟢|🔴30|🔍|🚫|🔴3|⚡|🟢|⚡|🟢|🔴",
         ];
 
-        for (status, rendered) in exit_values.iter().zip(exit_values_rendered.iter()) {
+        for (status, rendered) in exit_values.iter().zip(&exit_values_rendered) {
             let main_exit_code = status[0];
             let pipe_exit_code = &status[1..];
 

src/modules/utils/directory_win.rs

@@ -1,6 +1,5 @@
 extern crate winapi;
 
-use std::iter;
 use std::mem;
 use std::os::windows::ffi::OsStrExt;
 use std::path::Path;
@@ -22,11 +21,7 @@ use winapi::um::winnt::{
 /// the current process access token and directory's security descriptor.
 /// Does not work for network drives and always returns true
 pub fn is_write_allowed(folder_path: &Path) -> std::result::Result<bool, &'static str> {
-    let folder_name: Vec<u16> = folder_path
-        .as_os_str()
-        .encode_wide()
-        .chain(iter::once(0))
-        .collect();
+    let folder_name: Vec<u16> = folder_path.as_os_str().encode_wide().chain([0]).collect();
 
     if is_network_path(&folder_name) {
         log::info!(

src/print.rs

@@ -300,13 +300,13 @@ fn compute_modules<'a>(context: &'a Context) -> Vec<Module<'a>> {
     for module in &modules {
         // Manually add all modules if `$all` is encountered
         if module == "all" {
-            for module in PROMPT_ORDER.iter() {
+            for module in PROMPT_ORDER {
                 let modules = handle_module(module, context, &modules);
-                prompt_order.extend(modules.into_iter());
+                prompt_order.extend(modules);
             }
         } else {
             let modules = handle_module(module, context, &modules);
-            prompt_order.extend(modules.into_iter());
+            prompt_order.extend(modules);
         }
     }
 

starship_module_config_derive/src/lib.rs

@@ -20,7 +20,7 @@ fn impl_module_config(dinput: DeriveInput) -> proc_macro::TokenStream {
             let mut load_tokens = quote! {};
             let mut fields = quote! {};
 
-            for field in fields_named.named.iter() {
+            for field in &fields_named.named {
                 let ident = field.ident.as_ref().unwrap();
 
                 let new_load_tokens = quote! {