Rust 1.49 Clippy Fixes (#2835)

crates/nu-cli/src/commands/command.rs

@@ -238,6 +238,7 @@ pub trait WholeStreamCommand: Send + Sync {
 
 // Custom commands are blocks, so we can use the information in the block to also
 // implement a WholeStreamCommand
+#[allow(clippy::suspicious_else_formatting)]
 #[async_trait]
 impl WholeStreamCommand for Block {
     fn name(&self) -> &str {

crates/nu-cli/src/commands/from_xml.rs

@@ -35,7 +35,7 @@ fn from_attributes_to_value(attributes: &[roxmltree::Attribute], tag: impl Into<
     collected.into_value()
 }
 
-fn from_node_to_value<'a, 'd>(n: &roxmltree::Node<'a, 'd>, tag: impl Into<Tag>) -> Value {
+fn from_node_to_value(n: &roxmltree::Node, tag: impl Into<Tag>) -> Value {
     let tag = tag.into();
 
     if n.is_element() {

crates/nu-cli/src/commands/random/bool.rs

@@ -59,7 +59,7 @@ pub async fn bool_command(args: CommandArgs) -> Result<OutputStream, ShellError>
     if let Some(prob) = bias {
         probability = *prob as f64;
 
-        let probability_is_valid = 0.0 <= probability && probability <= 1.0;
+        let probability_is_valid = (0.0..=1.0).contains(&probability);
 
         if !probability_is_valid {
             return Err(ShellError::labeled_error(

crates/nu-cli/src/commands/seq_dates.rs

@@ -197,7 +197,7 @@ async fn seq_dates(args: CommandArgs) -> Result<OutputStream, ShellError> {
             let clone = i.clone();
             i.to_value(clone.tag)
         }
-        _ => (1 as i64).to_value_create_tag(),
+        _ => (1_i64).to_value_create_tag(),
     };
 
     let day_count: Option<Value> = match days {

crates/nu-cli/src/commands/str_/substring.rs

@@ -251,7 +251,7 @@ fn process_arguments(range: Value, name: impl Into<Tag>) -> Result<(isize, isize
     }?;
 
     let start = match &search {
-        SubstringText(start, _) if start == "" || start == "_" => 0,
+        SubstringText(start, _) if start.is_empty() || start == "_" => 0,
         SubstringText(start, _) => start.trim().parse().map_err(|_| {
             ShellError::labeled_error(
                 "could not perform substring",
@@ -262,7 +262,7 @@ fn process_arguments(range: Value, name: impl Into<Tag>) -> Result<(isize, isize
     };
 
     let end = match &search {
-        SubstringText(_, end) if end == "" || end == "_" => isize::max_value(),
+        SubstringText(_, end) if end.is_empty() || end == "_" => isize::max_value(),
         SubstringText(_, end) => end.trim().parse().map_err(|_| {
             ShellError::labeled_error(
                 "could not perform substring",

crates/nu-cli/src/commands/table/command.rs

@@ -75,7 +75,7 @@ fn values_to_entries(
         let mut row: Vec<StyledString> = headers
             .iter()
             .map(|d: &StyledString| {
-                if d.contents == "" {
+                if d.contents.is_empty() {
                     match value {
                         Value {
                             value: UntaggedValue::Row(..),

crates/nu-cli/src/commands/to_html.rs

@@ -284,7 +284,7 @@ async fn to_html(args: CommandArgs) -> Result<OutputStream, ShellError> {
     let input: Vec<Value> = input.collect().await;
     let headers = nu_protocol::merge_descriptors(&input);
     let headers = Some(headers)
-        .filter(|headers| !headers.is_empty() && (headers.len() > 1 || headers[0] != ""));
+        .filter(|headers| !headers.is_empty() && (headers.len() > 1 || !headers[0].is_empty()));
     let mut output_string = String::new();
     let mut regex_hm: HashMap<u32, (&str, String)> = HashMap::new();
 

crates/nu-cli/src/commands/to_md.rs

@@ -59,7 +59,7 @@ async fn to_md(args: CommandArgs) -> Result<OutputStream, ShellError> {
     let mut escaped_headers: Vec<String> = Vec::new();
     let mut column_widths: Vec<usize> = Vec::new();
 
-    if !headers.is_empty() && (headers.len() > 1 || headers[0] != "") {
+    if !headers.is_empty() && (headers.len() > 1 || !headers[0].is_empty()) {
         for header in &headers {
             let escaped_header_string = htmlescape::encode_minimal(&header);
             column_widths.push(escaped_header_string.len());

crates/nu-cli/src/commands/to_xml.rs

@@ -7,7 +7,6 @@ use quick_xml::events::{BytesEnd, BytesStart, BytesText, Event};
 use std::collections::HashSet;
 use std::io::Cursor;
 use std::io::Write;
-use std::iter::FromIterator;
 
 pub struct ToXML;
 
@@ -77,7 +76,7 @@ pub fn get_children(row: &Value) -> Option<&Vec<Value>> {
 
 pub fn is_xml_row(row: &Value) -> bool {
     if let UntaggedValue::Row(r) = &row.value {
-        let keys: HashSet<&String> = HashSet::from_iter(r.keys());
+        let keys: HashSet<&String> = r.keys().collect();
         let children: String = "children".to_string();
         let attributes: String = "attributes".to_string();
         return keys.contains(&children) && keys.contains(&attributes) && keys.len() == 2;

crates/nu-cli/src/completion/command.rs

@@ -38,7 +38,7 @@ impl Completer for CommandCompleter {
             })
             .collect();
 
-        if partial != "" {
+        if !partial.is_empty() {
             let path_completer = crate::completion::path::PathCompleter;
             let path_results = path_completer.path_suggestions(partial, matcher);
             let iter = path_results.into_iter().filter_map(|path_suggestion| {

crates/nu-cli/src/completion/path.rs

@@ -22,7 +22,7 @@ impl PathCompleter {
             None => ("", expanded),
         };
 
-        let base_dir = if base_dir_name == "" {
+        let base_dir = if base_dir_name.is_empty() {
             PathBuf::from(".")
         } else {
             #[cfg(feature = "directories")]

crates/nu-json/src/de.rs

@@ -243,7 +243,7 @@ where
                         }
                     }
                     _ => {
-                        if chf == b'-' || chf >= b'0' && chf <= b'9' {
+                        if chf == b'-' || (b'0'..=b'9').contains(&chf) {
                             let mut pn = ParseNumber::new(self.str_buf.iter().cloned());
                             match pn.parse(false) {
                                 Ok(Number::F64(v)) => {
@@ -435,7 +435,7 @@ where
 
                                     let n2 = self.decode_hex_escape()?;
 
-                                    if n2 < 0xDC00 || n2 > 0xDFFF {
+                                    if !(0xDC00..=0xDFFF).contains(&n2) {
                                         return Err(self
                                             .rdr
                                             .error(ErrorCode::LoneLeadingSurrogateInHexEscape));

crates/nu-json/src/value.rs

@@ -107,7 +107,7 @@ impl Value {
             }
             s.parse().ok()
         }
-        if pointer == "" {
+        if pointer.is_empty() {
             return Some(self);
         }
         if !pointer.starts_with('/') {

crates/nu-source/src/meta.rs

@@ -399,7 +399,7 @@ impl Tag {
         self.span.slice(source)
     }
 
-    pub fn string<'a>(&self, source: &'a str) -> String {
+    pub fn string(&self, source: &str) -> String {
         self.span.slice(source).to_string()
     }
 
@@ -407,7 +407,7 @@ impl Tag {
         self.span.slice(source).tagged(self)
     }
 
-    pub fn tagged_string<'a>(&self, source: &'a str) -> Tagged<String> {
+    pub fn tagged_string(&self, source: &str) -> Tagged<String> {
         self.span.slice(source).to_string().tagged(self)
     }
 
@@ -595,7 +595,7 @@ impl Span {
         }
     }
 
-    pub fn string<'a>(&self, source: &'a str) -> String {
+    pub fn string(&self, source: &str) -> String {
         self.slice(source).to_string()
     }
 
@@ -603,7 +603,7 @@ impl Span {
         self.slice(source).spanned(*self)
     }
 
-    pub fn spanned_string<'a>(&self, source: &'a str) -> Spanned<String> {
+    pub fn spanned_string(&self, source: &str) -> Spanned<String> {
         self.slice(source).to_string().spanned(*self)
     }
 

crates/nu-table/src/table.rs

@@ -46,10 +46,7 @@ impl TextStyle {
     }
 
     pub fn bold(&self, bool_value: Option<bool>) -> TextStyle {
-        let bv = match bool_value {
+        let bv = bool_value.unwrap_or(false);
-            Some(v) => v,
-            None => false,
-        };
 
         TextStyle {
             alignment: self.alignment,

crates/nu-table/src/wrap.rs

@@ -74,7 +74,7 @@ pub fn split_sublines(input: &str) -> Vec<Vec<Subline>> {
         .collect::<Vec<_>>()
 }
 
-pub fn column_width<'a>(input: &[Vec<Subline<'a>>]) -> usize {
+pub fn column_width(input: &[Vec<Subline>]) -> usize {
     let mut max = 0;
 
     for line in input {
@@ -100,7 +100,7 @@ pub fn column_width<'a>(input: &[Vec<Subline<'a>>]) -> usize {
     max
 }
 
-fn split_word<'a>(cell_width: usize, word: &'a str) -> Vec<Subline<'a>> {
+fn split_word(cell_width: usize, word: &str) -> Vec<Subline> {
     use unicode_width::UnicodeWidthChar;
 
     let mut output = vec![];

crates/nu_plugin_inc/src/inc.rs

@@ -79,7 +79,7 @@ impl Inc {
                 Ok(UntaggedValue::int(i + 1).into_value(value.tag()))
             }
             UntaggedValue::Primitive(Primitive::Filesize(b)) => {
-                Ok(UntaggedValue::filesize(b + 1 as u64).into_value(value.tag()))
+                Ok(UntaggedValue::filesize(b + 1_u64).into_value(value.tag()))
             }
             UntaggedValue::Primitive(Primitive::String(ref s)) => {
                 Ok(self.apply(&s)?.into_value(value.tag()))

crates/nu_plugin_textview/src/textview.rs

@@ -40,7 +40,7 @@ pub fn view_text_value(value: &Value) {
                         term_width = value.as_u64().unwrap_or(term_width as u64) as usize;
                     }
                     "tab_width" => {
-                        tab_width = value.as_u64().unwrap_or(4 as u64);
+                        tab_width = value.as_u64().unwrap_or(4_u64);
                     }
                     "colored_output" => colored_output = value.as_bool().unwrap_or(true),
                     "true_color" => true_color = value.as_bool().unwrap_or(true),

crates/nu_plugin_to_sqlite/src/to_sqlite.rs

@@ -16,7 +16,7 @@ impl ToSqlite {
     }
 }
 fn comma_concat(acc: String, current: String) -> String {
-    if acc == "" {
+    if acc.is_empty() {
         current
     } else {
         format!("{}, {}", acc, current)