Require Dart 3.0, update and fix lints (#194)

.github/workflows/test-package.yml

@@ -47,7 +47,7 @@ jobs:
       matrix:
         # Add macos-latest and/or windows-latest if relevant for this package.
         os: [ubuntu-latest, windows-latest]
-        sdk: [2.19.0, dev]
+        sdk: [3.0, dev]
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
       - uses: dart-lang/setup-dart@b64355ae6ca0b5d484f0106a033dd1388965d06d

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.0.1-wip
+
+- Require Dart 3.0
+
 ## 1.0.0
 
 - Rev to `1.0.0` (note however that there are no API changes from `0.17.x`).

analysis_options.yaml

@@ -5,3 +5,9 @@ analyzer:
     strict-casts: true
     strict-inference: true
     strict-raw-types: true
+  errors:
+    comment_references: ignore #too many false positives
+
+linter:
+  rules:
+    - prefer_expression_function_bodies

example/main.dart

@@ -84,9 +84,8 @@ StyleSheet parseCss(
   String cssInput, {
   List<css.Message>? errors,
   css.PreprocessorOptions? opts,
-}) {
-  return css.parse(cssInput, errors: errors, options: opts ?? _default);
-}
+}) =>
+    css.parse(cssInput, errors: errors, options: opts ?? _default);
 
 /// Pretty printer for CSS.
 String prettyPrint(StyleSheet ss) =>

lib/parser.dart

@@ -38,7 +38,7 @@ class ParserState extends TokenizerState {
 
 void _createMessages({List<Message>? errors, PreprocessorOptions? options}) {
   errors ??= [];
-  options ??= PreprocessorOptions(useColors: false, inputFile: 'memory');
+  options ??= const PreprocessorOptions(useColors: false, inputFile: 'memory');
 
   messages = Messages(options: options, printHandler: errors.add);
 }
@@ -258,24 +258,18 @@ class _Parser {
   ///////////////////////////////////////////////////////////////////
   // Basic support methods
   ///////////////////////////////////////////////////////////////////
-  int _peek() {
-    return _peekToken.kind;
-  }
+  int _peek() => _peekToken.kind;
 
   Token _next({bool unicodeRange = false}) {
     final next = _previousToken = _peekToken;
     _peekToken = tokenizer.next(unicodeRange: unicodeRange);
     return next;
   }
 
-  bool _peekKind(int kind) {
-    return _peekToken.kind == kind;
-  }
+  bool _peekKind(int kind) => _peekToken.kind == kind;
 
   // Is the next token a legal identifier?  This includes pseudo-keywords.
-  bool _peekIdentifier() {
-    return TokenKind.isIdentifier(_peekToken.kind);
-  }
+  bool _peekIdentifier() => TokenKind.isIdentifier(_peekToken.kind);
 
   /// Marks the parser/tokenizer look ahead to support Less nested selectors.
   ParserState get _mark => ParserState(_peekToken, _previousToken, tokenizer);
@@ -792,9 +786,8 @@ class _Parser {
       }
 
       var declGroup = processDeclarations(checkBrace: false);
-      if (declGroup.declarations.any((decl) {
-        return decl is Declaration && decl is! IncludeMixinAtDeclaration;
-      })) {
+      if (declGroup.declarations.any((decl) =>
+          decl is Declaration && decl is! IncludeMixinAtDeclaration)) {
         var newDecls = <Declaration>[];
         for (var include in productions) {
           // If declGroup has items that are declarations then we assume
@@ -2038,40 +2031,31 @@ class _Parser {
   DartStyleExpression? processOneNumber(Expressions exprs, int part) {
     var value = marginValue(exprs.expressions[0]);
     if (value != null) {
-      switch (part) {
-        case _marginPartLeft:
-          return MarginExpression(exprs.span, left: value);
-        case _marginPartTop:
-          return MarginExpression(exprs.span, top: value);
-        case _marginPartRight:
-          return MarginExpression(exprs.span, right: value);
-        case _marginPartBottom:
-          return MarginExpression(exprs.span, bottom: value);
-        case _borderPartLeft:
-        case _borderPartLeftWidth:
-          return BorderExpression(exprs.span, left: value);
-        case _borderPartTop:
-        case _borderPartTopWidth:
-          return BorderExpression(exprs.span, top: value);
-        case _borderPartRight:
-        case _borderPartRightWidth:
-          return BorderExpression(exprs.span, right: value);
-        case _borderPartBottom:
-        case _borderPartBottomWidth:
-          return BorderExpression(exprs.span, bottom: value);
-        case _heightPart:
-          return HeightExpression(exprs.span, value);
-        case _widthPart:
-          return WidthExpression(exprs.span, value);
-        case _paddingPartLeft:
-          return PaddingExpression(exprs.span, left: value);
-        case _paddingPartTop:
-          return PaddingExpression(exprs.span, top: value);
-        case _paddingPartRight:
-          return PaddingExpression(exprs.span, right: value);
-        case _paddingPartBottom:
-          return PaddingExpression(exprs.span, bottom: value);
-      }
+      return switch (part) {
+        _marginPartLeft => MarginExpression(exprs.span, left: value),
+        _marginPartTop => MarginExpression(exprs.span, top: value),
+        _marginPartRight => MarginExpression(exprs.span, right: value),
+        _marginPartBottom => MarginExpression(exprs.span, bottom: value),
+        _borderPartLeft ||
+        _borderPartLeftWidth =>
+          BorderExpression(exprs.span, left: value),
+        _borderPartTop ||
+        _borderPartTopWidth =>
+          BorderExpression(exprs.span, top: value),
+        _borderPartRight ||
+        _borderPartRightWidth =>
+          BorderExpression(exprs.span, right: value),
+        _borderPartBottom ||
+        _borderPartBottomWidth =>
+          BorderExpression(exprs.span, bottom: value),
+        _heightPart => HeightExpression(exprs.span, value),
+        _widthPart => WidthExpression(exprs.span, value),
+        _paddingPartLeft => PaddingExpression(exprs.span, left: value),
+        _paddingPartTop => PaddingExpression(exprs.span, top: value),
+        _paddingPartRight => PaddingExpression(exprs.span, right: value),
+        _paddingPartBottom => PaddingExpression(exprs.span, bottom: value),
+        _ => null
+      };
     }
     return null;
   }

lib/src/messages.dart

@@ -86,7 +86,7 @@ class Messages {
   final List<Message> messages = <Message>[];
 
   Messages({PreprocessorOptions? options, this.printHandler = print})
-      : options = options ?? PreprocessorOptions();
+      : options = options ?? const PreprocessorOptions();
 
   /// Report a compile-time CSS error.
   void error(String message, SourceSpan? span) {

lib/src/property.dart

@@ -504,14 +504,12 @@ class Rgba implements _StyleProperty, ColorBase {
 
   factory Rgba.fromColor(Color color) => color.rgba;
 
-  factory Rgba.fromArgbValue(num value) {
-    return Rgba(
-      (value.toInt() & 0xff000000) >> 0x18, // a
-      (value.toInt() & 0xff0000) >> 0x10, // r
-      (value.toInt() & 0xff00) >> 8, // g
-      value.toInt() & 0xff,
-    ); // b
-  }
+  factory Rgba.fromArgbValue(num value) => Rgba(
+        (value.toInt() & 0xff000000) >> 0x18, // a
+        (value.toInt() & 0xff0000) >> 0x10, // r
+        (value.toInt() & 0xff00) >> 8, // g
+        value.toInt() & 0xff,
+      ); // b
 
   factory Rgba.fromHsla(Hsla hsla) {
     // Convert to Rgba.
@@ -752,10 +750,9 @@ class PointXY implements _StyleProperty {
   const PointXY(this.x, this.y);
 
   @override
-  String? get cssExpression {
-    // TODO(terry): TBD
-    return null;
-  }
+  String? get cssExpression =>
+      // TODO(terry): TBD
+      null;
 }
 
 // TODO(terry): Implement style and color.
@@ -779,14 +776,12 @@ class Border implements _StyleProperty {
   int get height => top! + bottom!;
 
   @override
-  String get cssExpression {
-    return (top == left && bottom == right && top == right)
-        ? '${left}px'
-        : "${top != null ? '$top' : '0'}px "
-            "${right != null ? '$right' : '0'}px "
-            "${bottom != null ? '$bottom' : '0'}px "
-            "${left != null ? '$left' : '0'}px";
-  }
+  String get cssExpression => (top == left && bottom == right && top == right)
+      ? '${left}px'
+      : "${top != null ? '$top' : '0'}px "
+          "${right != null ? '$right' : '0'}px "
+          "${bottom != null ? '$bottom' : '0'}px "
+          "${left != null ? '$left' : '0'}px";
 }
 
 /// Font style constants.
@@ -1069,10 +1064,9 @@ class Font implements _StyleProperty {
   }
 
   @override
-  int get hashCode {
-    // TODO(jimhug): Lot's of potential collisions here. List of fonts, etc.
-    return size!.toInt() % family![0].hashCode;
-  }
+  int get hashCode =>
+      // TODO(jimhug): Lot's of potential collisions here. List of fonts, etc.
+      size!.toInt() % family![0].hashCode;
 
   @override
   bool operator ==(Object other) {