Updating Angular version

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

+library angular.core.parser.unparser;
+
+import 'package:angular/core/parser/syntax.dart';
+
+class Unparser extends Visitor {
+  final StringBuffer buffer;
+  Unparser(this.buffer);
+
+  static String unparse(Expression expression) {
+    StringBuffer buffer = new StringBuffer();
+    Unparser unparser = new Unparser(buffer);
+    unparser.visit(expression);
+    return "$buffer";
+  }
+
+  write(String string) {
+    buffer.write(string);
+  }
+
+  writeArguments(List<Expression> arguments) {
+    write('(');
+    for (int i = 0; i < arguments.length; i++) {
+      if (i != 0) write(',');
+      visit(arguments[i]);
+    }
+    write(')');
+  }
+
+  visitChain(Chain chain) {
+    for (int i = 0; i < chain.expressions.length; i++) {
+      if (i != 0) write(';');
+      visit(chain.expressions[i]);
+    }
+  }
+
+  visitFilter(Filter filter) {
+    write('(');
+    visit(filter.expression);
+    write('|${filter.name}');
+    for (int i = 0; i < filter.arguments.length; i++) {
+      write(' :');
+      visit(filter.arguments[i]);
+    }
+    write(')');
+  }
+
+  visitAssign(Assign assign) {
+    visit(assign.target);
+    write('=');
+    visit(assign.value);
+  }
+
+  visitConditional(Conditional conditional) {
+    visit(conditional.condition);
+    write('?');
+    visit(conditional.yes);
+    write(':');
+    visit(conditional.no);
+  }
+
+  visitAccessScope(AccessScope access) {
+    write(access.name);
+  }
+
+  visitAccessMember(AccessMember access) {
+    visit(access.object);
+    write('.${access.name}');
+  }
+
+  visitAccessKeyed(AccessKeyed access) {
+    visit(access.object);
+    write('[');
+    visit(access.key);
+    write(']');
+  }
+
+  visitCallScope(CallScope call) {
+    write(call.name);
+    writeArguments(call.arguments);
+  }
+
+  visitCallFunction(CallFunction call) {
+    visit(call.function);
+    writeArguments(call.arguments);
+  }
+
+  visitCallMember(CallMember call) {
+    visit(call.object);
+    write('.${call.name}');
+    writeArguments(call.arguments);
+  }
+
+  visitPrefix(Prefix prefix) {
+    write('(${prefix.operation}');
+    visit(prefix.expression);
+    write(')');
+  }
+
+  visitBinary(Binary binary) {
+    write('(');
+    visit(binary.left);
+    write(binary.operation);
+    visit(binary.right);
+    write(')');
+  }
+
+  visitLiteralPrimitive(LiteralPrimitive literal) {
+    write("${literal.value}");
+  }
+
+  visitLiteralArray(LiteralArray literal) {
+    write('[');
+    for (int i = 0; i < literal.elements.length; i++) {
+      if (i != 0) write(',');
+      visit(literal.elements[i]);
+    }
+    write(']');
+  }
+
+  visitLiteralObject(LiteralObject literal) {
+    write('{');
+    List<String> keys = literal.keys;
+    for (int i = 0; i < keys.length; i++) {
+      if (i != 0) write(',');
+      write("'${keys[i]}':");
+      visit(literal.values[i]);
+    }
+    write('}');
+  }
+
+  visitLiteralString(LiteralString literal) {
+    String escaped = literal.value.replaceAll("'", "\\'");
+    write("'$escaped'");
+  }
+}