pkg/csslib: fixed analysis error, more cleanup

pkg/csslib/lib/parser.dart

Index: pkg/csslib/lib/parser.dart
diff --git a/pkg/csslib/lib/parser.dart b/pkg/csslib/lib/parser.dart
index 92f16524e751c5f935ff140dd38a23798393be39..9756432f3206ea6268b528852e70c554738c0f98 100644
--- a/pkg/csslib/lib/parser.dart
+++ b/pkg/csslib/lib/parser.dart
@@ -30,7 +30,7 @@ class ParserState extends TokenizerState {
       : super(tokenizer);
 }
 
-void _createMessages({List errors, List options}) {
+void _createMessages({List<Message> errors, List<String> options}) {
   if (errors == null) errors = [];
 
   if (options == null) {
@@ -45,8 +45,11 @@ bool get isChecked => messages.options.checked;
 
 // TODO(terry): Remove nested name parameter.
 /** Parse and analyze the CSS file. */
-StyleSheet compile(var input, {List errors, List options, bool nested: true,
-    bool polyfill: false, List<StyleSheet> includes: null}) {
+StyleSheet compile(var input, {List<Message> errors, List<String> options,
+  bool nested: true,
+  bool polyfill: false,
+  List<StyleSheet> includes: null}) {
+
   if (includes == null) {
     includes = [];
   }
@@ -70,7 +73,9 @@ StyleSheet compile(var input, {List errors, List options, bool nested: true,
 }
 
 /** Analyze the CSS file. */
-void analyze(List<StyleSheet> styleSheets,  {List errors, List options}) {
+void analyze(List<StyleSheet> styleSheets,
+             {List<Message> errors, List<String> options}) {
+
   _createMessages(errors: errors, options: options);
   new Analyzer(styleSheets, messages).run();
 }
@@ -80,7 +85,7 @@ void analyze(List<StyleSheet> styleSheets,  {List errors, List options}) {
  * or [List<int>] of bytes and returns a [StyleSheet] AST.  The optional
  * [errors] list will contain each error/warning as a [Message].
  */
-StyleSheet parse(var input, {List errors, List options}) {
+StyleSheet parse(var input, {List<Message> errors, List<String> options}) {
   var source = _inputAsString(input);
 
   _createMessages(errors: errors, options: options);
@@ -95,7 +100,7 @@ StyleSheet parse(var input, {List errors, List options}) {
  * or [List<int>] of bytes and returns a [StyleSheet] AST.  The optional
  * [errors] list will contain each error/warning as a [Message].
  */
-StyleSheet selector(var input, {List errors}) {
+StyleSheet selector(var input, {List<Message> errors}) {
   var source = _inputAsString(input);
 
   _createMessages(errors: errors);
@@ -150,7 +155,7 @@ class Parser {
 
 /** A simple recursive descent parser for CSS. */
 class _Parser {
-  Tokenizer tokenizer;
+  final Tokenizer tokenizer;
 
   /** Base url of CSS file. */
   final String _baseUrl;
@@ -1184,7 +1189,7 @@ class _Parser {
   /**
    * Return list of selectors
    */
-  processSelector() {
+  Selector processSelector() {
     List<SimpleSelectorSequence> simpleSequences = [];
     int start = _peekToken.start;
     while (true) {
@@ -1539,7 +1544,7 @@ class _Parser {
   //  SUBSTRMATCH:      '*='
   //
   //
-  processAttribute() {
+  AttributeSelector processAttribute() {
     int start = _peekToken.start;
 
     if (_maybeEat(TokenKind.LBRACK)) {
@@ -1593,7 +1598,7 @@ class _Parser {
   //   *IDENT                   - IE7 or below
   //   _IDENT                   - IE6 property (automatically a valid ident)
   //
-  processDeclaration(List dartStyles) {
+  Declaration processDeclaration(List dartStyles) {
     Declaration decl;
 
     int start = _peekToken.start;
@@ -1730,13 +1735,9 @@ class _Parser {
     'normal' : FontWeight.normal
   };
 
-  static _findStyle(String styleName) {
-    if (_stylesToDart.containsKey(styleName)) {
-      return _stylesToDart[styleName];
-    }
-  }
+  static _findStyle(String styleName) => _stylesToDart[styleName];
 
-  _styleForDart(Identifier property, Expressions exprs, List dartStyles) {
+  DartStyleExpression _styleForDart(Identifier property, Expressions exprs, List dartStyles) {
     int styleType = _findStyle(property.name.toLowerCase());
     if (styleType != null) {
       return buildDartStyleNode(styleType, exprs, dartStyles);
@@ -1754,7 +1755,9 @@ class _Parser {
     return fontExpr;
   }
 
-  buildDartStyleNode(int styleType, Expressions exprs, List dartStyles) {
+  DartStyleExpression buildDartStyleNode(int styleType, Expressions exprs,
+                                         List dartStyles) {
+
     switch (styleType) {
       /*
        * Properties in order:
@@ -1897,7 +1900,7 @@ class _Parser {
 
   // TODO(terry): Look at handling width of thin, thick, etc. any none numbers
   //              to convert to a number.
-  processOneNumber(Expressions exprs, int part) {
+  DartStyleExpression processOneNumber(Expressions exprs, int part) {
     var value = marginValue(exprs.expressions[0]);
     if (value != null) {
       switch (part) {
@@ -1947,7 +1950,7 @@ class _Parser {
    *
    * The values of the margins can be a unit or unitless or auto.
    */
-  processFourNums(Expressions exprs) {
+  BoxEdge processFourNums(Expressions exprs) {
     num top;
     num right;
     num bottom;
@@ -2000,7 +2003,7 @@ class _Parser {
   //  operator:     '/' | ','
   //  term:         (see processTerm)
   //
-  processExpr([bool ieFilter = false]) {
+  Expression processExpr([bool ieFilter = false]) {
     int start = _peekToken.start;
     Expressions expressions = new Expressions(_makeSpan(start));
 
@@ -2061,7 +2064,7 @@ class _Parser {
     return expressions;
   }
 
-  static int MAX_UNICODE = int.parse('0x10FFFF');
+  static final int MAX_UNICODE = int.parse('0x10FFFF');
 
   //  Term grammar:
   //
@@ -2248,8 +2251,8 @@ class _Parser {
   }
 
   /** Process all dimension units. */
-  processDimension(Token t, var value, Span span) {
-    var term;
+  LiteralTerm processDimension(Token t, var value, Span span) {
+    LiteralTerm term;
     var unitType = this._peek();
 
     switch (unitType) {
@@ -2328,7 +2331,7 @@ class _Parser {
     return term;
   }
 
-  processQuotedString([bool urlString = false]) {
+  String processQuotedString([bool urlString = false]) {
     int start = _peekToken.start;
 
     // URI term sucks up everything inside of quotes(' or ") or between parens
@@ -2470,7 +2473,7 @@ class _Parser {
     return null;
   }
 
-  identifier() {
+  Identifier identifier() {
     var tok = _next();
 
     if (!TokenKind.isIdentifier(tok.kind) &&
@@ -2535,7 +2538,7 @@ class ExpressionsProcessor {
   ExpressionsProcessor(this._exprs);
 
   // TODO(terry): Only handles ##px unit.
-  processFontSize() {
+  FontExpression processFontSize() {
     /* font-size[/line-height]
      *
      * Possible size values:
@@ -2580,7 +2583,7 @@ class ExpressionsProcessor {
     return new FontExpression(_exprs.span, size: size, lineHeight: lineHt);
   }
 
-  processFontFamily() {
+  FontExpression processFontFamily() {
     final List<String> family = <String>[];
 
     /* Possible family values:
@@ -2609,7 +2612,7 @@ class ExpressionsProcessor {
     return new FontExpression(_exprs.span, family: family);
   }
 
-  processFont() {
+  FontExpression processFont() {
     var family;
 
     // Process all parts of the font expression.