Revert "Revert "PEG Parser: under review at http://codereview.chromium.org/8399029""

client/dom/scripts/idlparser_test.dart

+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#import('../../../utils/peg/pegparser.dart');
+#source('idlparser.dart');
+#source('idlrenderer.dart');
+
+main() {
+  IDLParser parser = new IDLParser(FREMONTCUT_SYNTAX);
+  Grammar g = parser.grammar;
+
+  var Type = g['Type'];
+
+  show(g, Type, 'int');
+  show(g, Type, 'int ?');
+  show(g, Type, 'sequence<int?> ?');
+  show(g, Type, 'unsigned long long?');
+  show(g, Type, 'unsignedlonglong?');
+
+
+  var MaybeAnnotations = g['MaybeAnnotations'];
+
+  show(g, MaybeAnnotations, '');
+  show(g, MaybeAnnotations, '@Foo');
+  show(g, MaybeAnnotations, '@Foo @Bar');
+  show(g, MaybeAnnotations, '@Foo(A,B=1) @Bar');
+
+  var MaybeExtAttrs = g['MaybeExtAttrs'];
+  print(MaybeExtAttrs);
+
+  show(g, MaybeExtAttrs, '');
+  show(g, MaybeExtAttrs, '[A]');
+
+  var Module = g['Module'];
+
+  show(g, Module, 'module Harry { const int bob = 30;};');
+  show(g, Module, """
+module Harry { [X,Y,Z=99] const int bob = 30; typedef x y;
+
+  interface Thing : SuperA, @Friendly SuperB {
+
+    [Nice] const unsigned long long kFoo = 12345;
+    [A,B,C,D,E] attribute int attr1;
+    [F=f(int a),K=99,DartName=Bert] int smudge(int a, int b, double x);
+
+    [X,Y,Z] int xyz([U,V] optional in optional int z);
+    [P,Q,R] int pqr();
+    int op1();
+    @Smurf @Beans(B=1,C,A=2) int op2();
+
+    snippet { yadda
+              yadda
+    };
+  };
+
+//[A] const unsigned long long dweeb = 0xff;
+
+};
+""");
+}
+
+
+
+show(grammar, rule, input) {
+  print('show: "$input"');
+  var ast;
+  try {
+    ast = grammar.parse(rule, input);
+  } catch (var exception) {
+    if (exception is ParseError)
+      ast = exception;
+    else
+      throw;
+  }
+  print('${printList(ast)}');
+  print(render(ast));
+}
+
+void check(grammar, rule, input, expected) {
+  // If [expected] is String then the result is coerced to string.
+  // If [expected] is !String, the result is compared directly.
+  print('check: "$input"');
+  var ast;
+  try {
+    ast = grammar.parse(rule, input);
+  } catch (var exception) {
+    ast = exception;
+  }
+
+  var formatted = ast;
+  if (expected is String)
+    formatted = printList(ast);
+
+  Expect.equals(expected, formatted, "parse: $input");
+}
+
+// Prints the list in [1,2,3] notation, including nested lists.
+void printList(item) {
+  if (item is List) {
+    StringBuffer sb = new StringBuffer();
+    sb.add('[');
+    var sep = '';
+    for (var x in item) {
+      sb.add(sep);
+      sb.add(printList(x));
+      sep = ',';
+    }
+    sb.add(']');
+    return sb.toString();
+  }
+  if (item == null)
+    return 'null';
+  return item.toString();
+}