remove lifetime from lexer

crates/compiler/src/lexer.rs

@@ -1,4 +1,4 @@
-use std::{borrow::Cow, iter::Peekable, str::Chars, sync::Arc};
+use std::{iter::Peekable, str::Chars, sync::Arc};
 
 use codemap::{File, Span};
 
@@ -11,9 +11,8 @@ pub(crate) struct Token {
 }
 
 #[derive(Debug, Clone)]
-// todo: remove lifetime as Cow is now superfluous
+pub(crate) struct Lexer {
-pub(crate) struct Lexer<'a> {
+    buf: Vec<Token>,
-    buf: Cow<'a, [Token]>,
     entire_span: Span,
     cursor: usize,
     /// If the input this lexer is spanned over is larger than the original span.
@@ -21,7 +20,7 @@ pub(crate) struct Lexer<'a> {
     is_expanded: bool,
 }
 
-impl<'a> Lexer<'a> {
+impl Lexer {
     pub fn raw_text(&self, start: usize) -> String {
         self.buf[start..self.cursor]
             .iter()
@@ -97,7 +96,7 @@ impl<'a> Lexer<'a> {
     }
 }
 
-impl<'a> Iterator for Lexer<'a> {
+impl Iterator for Lexer {
     type Item = Token;
 
     fn next(&mut self) -> Option<Self::Item> {
@@ -151,7 +150,7 @@ impl<'a> Iterator for TokenLexer<'a> {
     }
 }
 
-impl<'a> Lexer<'a> {
+impl Lexer {
     pub fn new_from_file(file: &Arc<File>) -> Self {
         let buf = TokenLexer::new(file.source().chars().peekable()).collect();
         Self::new(buf, file.span, false)
@@ -166,7 +165,7 @@ impl<'a> Lexer<'a> {
 
     fn new(buf: Vec<Token>, entire_span: Span, is_expanded: bool) -> Self {
         Lexer {
-            buf: Cow::Owned(buf),
+            buf,
             cursor: 0,
             entire_span,
             is_expanded,

crates/compiler/src/parse/at_root_query.rs

@@ -4,22 +4,22 @@ use crate::{ast::AtRootQuery, error::SassResult, lexer::Lexer};
 
 use super::BaseParser;
 
-pub(crate) struct AtRootQueryParser<'a> {
+pub(crate) struct AtRootQueryParser {
-    toks: Lexer<'a>,
+    toks: Lexer,
 }
 
-impl<'a> BaseParser<'a> for AtRootQueryParser<'a> {
+impl BaseParser for AtRootQueryParser {
-    fn toks(&self) -> &Lexer<'a> {
+    fn toks(&self) -> &Lexer {
         &self.toks
     }
 
-    fn toks_mut(&mut self) -> &mut Lexer<'a> {
+    fn toks_mut(&mut self) -> &mut Lexer {
         &mut self.toks
     }
 }
 
-impl<'a> AtRootQueryParser<'a> {
+impl AtRootQueryParser {
-    pub fn new(toks: Lexer<'a>) -> AtRootQueryParser<'a> {
+    pub fn new(toks: Lexer) -> AtRootQueryParser {
         AtRootQueryParser { toks }
     }
 

crates/compiler/src/parse/base.rs

@@ -5,10 +5,9 @@ use crate::{
     Token,
 };
 
-// todo: can we simplify lifetimes (by maybe not storing reference to lexer)
+pub(crate) trait BaseParser {
-pub(crate) trait BaseParser<'a> {
+    fn toks(&self) -> &Lexer;
-    fn toks(&self) -> &Lexer<'a>;
+    fn toks_mut(&mut self) -> &mut Lexer;
-    fn toks_mut(&mut self) -> &mut Lexer<'a>;
 
     fn whitespace_without_comments(&mut self) {
         while matches!(

crates/compiler/src/parse/css.rs

@@ -10,19 +10,19 @@ use crate::{
 use super::{value::ValueParser, BaseParser, StylesheetParser};
 
 pub(crate) struct CssParser<'a> {
-    pub toks: Lexer<'a>,
+    pub toks: Lexer,
     pub path: &'a Path,
     pub empty_span: Span,
     pub flags: ContextFlags,
     pub options: &'a Options<'a>,
 }
 
-impl<'a> BaseParser<'a> for CssParser<'a> {
+impl<'a> BaseParser for CssParser<'a> {
-    fn toks(&self) -> &Lexer<'a> {
+    fn toks(&self) -> &Lexer {
         &self.toks
     }
 
-    fn toks_mut(&mut self) -> &mut Lexer<'a> {
+    fn toks_mut(&mut self) -> &mut Lexer {
         &mut self.toks
     }
 
@@ -103,7 +103,7 @@ impl<'a> StylesheetParser<'a> for CssParser<'a> {
 
 impl<'a> CssParser<'a> {
     pub fn new(
-        toks: Lexer<'a>,
+        toks: Lexer,
         options: &'a Options<'a>,
         empty_span: Span,
         file_name: &'a Path,

crates/compiler/src/parse/keyframes.rs

@@ -14,22 +14,22 @@ impl fmt::Display for KeyframesSelector {
     }
 }
 
-pub(crate) struct KeyframesSelectorParser<'a> {
+pub(crate) struct KeyframesSelectorParser {
-    toks: Lexer<'a>,
+    toks: Lexer,
 }
 
-impl<'a> BaseParser<'a> for KeyframesSelectorParser<'a> {
+impl<'a> BaseParser for KeyframesSelectorParser {
-    fn toks(&self) -> &Lexer<'a> {
+    fn toks(&self) -> &Lexer {
         &self.toks
     }
 
-    fn toks_mut(&mut self) -> &mut Lexer<'a> {
+    fn toks_mut(&mut self) -> &mut Lexer {
         &mut self.toks
     }
 }
 
-impl<'a> KeyframesSelectorParser<'a> {
+impl KeyframesSelectorParser {
-    pub fn new(toks: Lexer<'a>) -> KeyframesSelectorParser<'a> {
+    pub fn new(toks: Lexer) -> KeyframesSelectorParser {
         KeyframesSelectorParser { toks }
     }
 

crates/compiler/src/parse/media_query.rs

@@ -2,22 +2,22 @@ use crate::{ast::MediaQuery, error::SassResult, lexer::Lexer};
 
 use super::BaseParser;
 
-pub(crate) struct MediaQueryParser<'a> {
+pub(crate) struct MediaQueryParser {
-    pub toks: Lexer<'a>,
+    pub toks: Lexer,
 }
 
-impl<'a> BaseParser<'a> for MediaQueryParser<'a> {
+impl BaseParser for MediaQueryParser {
-    fn toks(&self) -> &Lexer<'a> {
+    fn toks(&self) -> &Lexer {
         &self.toks
     }
 
-    fn toks_mut(&mut self) -> &mut Lexer<'a> {
+    fn toks_mut(&mut self) -> &mut Lexer {
         &mut self.toks
     }
 }
 
-impl<'a> MediaQueryParser<'a> {
+impl MediaQueryParser {
-    pub fn new(toks: Lexer<'a>) -> MediaQueryParser<'a> {
+    pub fn new(toks: Lexer) -> MediaQueryParser {
         MediaQueryParser { toks }
     }
 

crates/compiler/src/parse/sass.rs

@@ -7,7 +7,7 @@ use crate::{ast::*, error::SassResult, lexer::Lexer, ContextFlags, Options, Toke
 use super::{BaseParser, StylesheetParser};
 
 pub(crate) struct SassParser<'a> {
-    pub toks: Lexer<'a>,
+    pub toks: Lexer,
     pub path: &'a Path,
     pub empty_span: Span,
     pub flags: ContextFlags,
@@ -18,12 +18,12 @@ pub(crate) struct SassParser<'a> {
     pub next_indentation_end: Option<usize>,
 }
 
-impl<'a> BaseParser<'a> for SassParser<'a> {
+impl<'a> BaseParser for SassParser<'a> {
-    fn toks(&self) -> &Lexer<'a> {
+    fn toks(&self) -> &Lexer {
         &self.toks
     }
 
-    fn toks_mut(&mut self) -> &mut Lexer<'a> {
+    fn toks_mut(&mut self) -> &mut Lexer {
         &mut self.toks
     }
 
@@ -344,7 +344,7 @@ impl<'a> StylesheetParser<'a> for SassParser<'a> {
 
 impl<'a> SassParser<'a> {
     pub fn new(
-        toks: Lexer<'a>,
+        toks: Lexer,
         options: &'a Options<'a>,
         empty_span: Span,
         file_name: &'a Path,

crates/compiler/src/parse/scss.rs

@@ -7,7 +7,7 @@ use crate::{lexer::Lexer, ContextFlags, Options};
 use super::{BaseParser, StylesheetParser};
 
 pub(crate) struct ScssParser<'a> {
-    pub toks: Lexer<'a>,
+    pub toks: Lexer,
     pub path: &'a Path,
     pub empty_span: Span,
     pub flags: ContextFlags,
@@ -16,7 +16,7 @@ pub(crate) struct ScssParser<'a> {
 
 impl<'a> ScssParser<'a> {
     pub fn new(
-        toks: Lexer<'a>,
+        toks: Lexer,
         options: &'a Options<'a>,
         empty_span: Span,
         file_name: &'a Path,
@@ -35,12 +35,12 @@ impl<'a> ScssParser<'a> {
     }
 }
 
-impl<'a> BaseParser<'a> for ScssParser<'a> {
+impl<'a> BaseParser for ScssParser<'a> {
-    fn toks(&self) -> &Lexer<'a> {
+    fn toks(&self) -> &Lexer {
         &self.toks
     }
 
-    fn toks_mut(&mut self) -> &mut Lexer<'a> {
+    fn toks_mut(&mut self) -> &mut Lexer {
         &mut self.toks
     }
 }

crates/compiler/src/parse/stylesheet.rs

@@ -23,10 +23,9 @@ use super::{
     BaseParser, DeclarationOrBuffer, ScssParser, VariableDeclOrInterpolation, RESERVED_IDENTIFIERS,
 };
 
-// todo: can we simplify lifetimes (by maybe not storing reference to lexer)
 /// Default implementations are oriented towards the SCSS syntax, as both CSS and
 /// SCSS share the behavior
-pub(crate) trait StylesheetParser<'a>: BaseParser<'a> + Sized {
+pub(crate) trait StylesheetParser<'a>: BaseParser + Sized {
     // todo: make constant?
     fn is_plain_css(&self) -> bool;
     // todo: make constant?

crates/compiler/src/selector/parse.rs

@@ -33,30 +33,30 @@ const SELECTOR_PSEUDO_CLASSES: [&str; 9] = [
 /// Pseudo-element selectors that take unadorned selectors as arguments.
 const SELECTOR_PSEUDO_ELEMENTS: [&str; 1] = ["slotted"];
 
-pub(crate) struct SelectorParser<'a> {
+pub(crate) struct SelectorParser {
     /// Whether this parser allows the parent selector `&`.
     allows_parent: bool,
 
     /// Whether this parser allows placeholder selectors beginning with `%`.
     allows_placeholder: bool,
 
-    pub toks: Lexer<'a>,
+    pub toks: Lexer,
 
     span: Span,
 }
 
-impl<'a> BaseParser<'a> for SelectorParser<'a> {
+impl BaseParser for SelectorParser {
-    fn toks(&self) -> &Lexer<'a> {
+    fn toks(&self) -> &Lexer {
         &self.toks
     }
 
-    fn toks_mut(&mut self) -> &mut Lexer<'a> {
+    fn toks_mut(&mut self) -> &mut Lexer {
         &mut self.toks
     }
 }
 
-impl<'a> SelectorParser<'a> {
+impl SelectorParser {
-    pub fn new(toks: Lexer<'a>, allows_parent: bool, allows_placeholder: bool, span: Span) -> Self {
+    pub fn new(toks: Lexer, allows_parent: bool, allows_placeholder: bool, span: Span) -> Self {
         Self {
             toks,
             allows_parent,

crates/lib/tests/macros.rs

@@ -174,6 +174,7 @@ struct TestLoggerState {
 #[derive(Debug, Default)]
 pub struct TestLogger(RefCell<TestLoggerState>);
 
+#[allow(unused)]
 impl TestLogger {
     pub fn debug_messages(&self) -> Vec<String> {
         self.0.borrow().debug_messages.clone()