Updating Angular version

third_party/pkg/angular/lib/core/parser/syntax.dart

+library angular.core.parser.syntax;
+
+import 'package:angular/core/parser/parser.dart' show LocalsWrapper;
+import 'package:angular/core/parser/unparser.dart' show Unparser;
+import 'package:angular/core/parser/utils.dart' show EvalError;
+
+abstract class Visitor {
+  visit(Expression expression)
+      => expression.accept(this);
+
+  visitExpression(Expression expression)
+      => null;
+  visitChain(Chain expression)
+      => visitExpression(expression);
+  visitFilter(Filter expression)
+      => visitExpression(expression);
+
+  visitAssign(Assign expression)
+      => visitExpression(expression);
+  visitConditional(Conditional expression)
+      => visitExpression(expression);
+
+  visitAccessScope(AccessScope expression)
+      => visitExpression(expression);
+  visitAccessMember(AccessMember expression)
+      => visitExpression(expression);
+  visitAccessKeyed(AccessKeyed expression)
+      => visitExpression(expression);
+
+  visitCallScope(CallScope expression)
+      => visitExpression(expression);
+  visitCallFunction(CallFunction expression)
+      => visitExpression(expression);
+  visitCallMember(CallMember expression)
+      => visitExpression(expression);
+
+  visitBinary(Binary expression)
+      => visitExpression(expression);
+
+  visitPrefix(Prefix expression)
+      => visitExpression(expression);
+
+  visitLiteral(Literal expression)
+      => visitExpression(expression);
+  visitLiteralPrimitive(LiteralPrimitive expression)
+      => visitLiteral(expression);
+  visitLiteralString(LiteralString expression)
+      => visitLiteral(expression);
+  visitLiteralArray(LiteralArray expression)
+      => visitLiteral(expression);
+  visitLiteralObject(LiteralObject expression)
+      => visitLiteral(expression);
+}
+
+abstract class Expression {
+  bool get isAssignable => false;
+  bool get isChain => false;
+
+  eval(scope)
+      => throw new EvalError("Cannot evaluate $this");
+  assign(scope, value)
+      => throw new EvalError("Cannot assign to $this");
+  bind(context, [LocalsWrapper wrapper])
+      => new BoundExpression(this, context, wrapper);
+
+  accept(Visitor visitor);
+  String toString() => Unparser.unparse(this);
+}
+
+class BoundExpression {
+  final Expression expression;
+  final _context;
+  final LocalsWrapper _wrapper;
+  BoundExpression(this.expression, this._context, this._wrapper);
+
+  call([locals]) => expression.eval(_computeContext(locals));
+  assign(value, [locals]) => expression.assign(_computeContext(locals), value);
+
+  _computeContext(locals) {
+    if (locals == null) return _context;
+    if (_wrapper != null) return _wrapper(_context, locals);
+    throw new StateError("Locals $locals provided, but missing wrapper.");
+  }
+}
+
+class Chain extends Expression {
+  final List<Expression> expressions;
+  Chain(this.expressions);
+  bool get isChain => true;
+  accept(Visitor visitor) => visitor.visitChain(this);
+}
+
+class Filter extends Expression {
+  final Expression expression;
+  final String name;
+  final List<Expression> arguments;
+  Filter(this.expression, this.name, this.arguments);
+  accept(Visitor visitor) => visitor.visitFilter(this);
+}
+
+class Assign extends Expression {
+  final Expression target;
+  final Expression value;
+  Assign(this.target, this.value);
+  accept(Visitor visitor) => visitor.visitAssign(this);
+}
+
+class Conditional extends Expression {
+  final Expression condition;
+  final Expression yes;
+  final Expression no;
+  Conditional(this.condition, this.yes, this.no);
+  accept(Visitor visitor) => visitor.visitConditional(this);
+}
+
+class AccessScope extends Expression {
+  final String name;
+  AccessScope(this.name);
+  bool get isAssignable => true;
+  accept(Visitor visitor) => visitor.visitAccessScope(this);
+}
+
+class AccessMember extends Expression {
+  final Expression object;
+  final String name;
+  AccessMember(this.object, this.name);
+  bool get isAssignable => true;
+  accept(Visitor visitor) => visitor.visitAccessMember(this);
+}
+
+class AccessKeyed extends Expression {
+  final Expression object;
+  final Expression key;
+  AccessKeyed(this.object, this.key);
+  bool get isAssignable => true;
+  accept(Visitor visitor) => visitor.visitAccessKeyed(this);
+}
+
+class CallScope extends Expression {
+  final String name;
+  final List<Expression> arguments;
+  CallScope(this.name, this.arguments);
+  accept(Visitor visitor) => visitor.visitCallScope(this);
+}
+
+class CallFunction extends Expression {
+  final Expression function;
+  final List<Expression> arguments;
+  CallFunction(this.function, this.arguments);
+  accept(Visitor visitor) => visitor.visitCallFunction(this);
+}
+
+class CallMember extends Expression {
+  final Expression object;
+  final String name;
+  final List<Expression> arguments;
+  CallMember(this.object, this.name, this.arguments);
+  accept(Visitor visitor) => visitor.visitCallMember(this);
+}
+
+class Binary extends Expression {
+  final String operation;
+  final Expression left;
+  final Expression right;
+  Binary(this.operation, this.left, this.right);
+  accept(Visitor visitor) => visitor.visitBinary(this);
+}
+
+class Prefix extends Expression {
+  final String operation;
+  final Expression expression;
+  Prefix(this.operation, this.expression);
+  accept(Visitor visitor) => visitor.visitPrefix(this);
+}
+
+abstract class Literal extends Expression {
+}
+
+class LiteralPrimitive extends Literal {
+  final value;
+  LiteralPrimitive(this.value);
+  accept(Visitor visitor) => visitor.visitLiteralPrimitive(this);
+}
+
+class LiteralString extends Literal {
+  final String value;
+  LiteralString(this.value);
+  accept(Visitor visitor) => visitor.visitLiteralString(this);
+}
+
+class LiteralArray extends Literal {
+  final List<Expression> elements;
+  LiteralArray(this.elements);
+  accept(Visitor visitor) => visitor.visitLiteralArray(this);
+}
+
+class LiteralObject extends Literal {
+  final List<String> keys;
+  final List<Expression> values;
+  LiteralObject(this.keys, this.values);
+  accept(Visitor visitor) => visitor.visitLiteralObject(this);
+}