Use Uint32 for `int` in IDL.

pkg/analyzer/tool/summary/generate.dart

 // Copyright (c) 2015, 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.
 
 /**
  * This file contains code to generate serialization/deserialization logic for
  * summaries based on an "IDL" description of the summary format (written in
  * stylized Dart).
  *
  * For each class in the "IDL" input, two corresponding classes are generated:
@@ skipping 370 matching lines @@
           String writeCode;
           if (fieldType.isList) {
             condition = ' || $valueName.isEmpty';
             if (_idl.classes.containsKey(fieldType.typeName)) {
               String itemCode = 'b.finish(fbBuilder)';
               String listCode = '$valueName.map((b) => $itemCode).toList()';
               writeCode = '$offsetName = fbBuilder.writeList($listCode);';
             } else if (_idl.enums.containsKey(fieldType.typeName)) {
               String itemCode = 'b.index';
               String listCode = '$valueName.map((b) => $itemCode).toList()';
-              writeCode = '$offsetName = fbBuilder.writeListInt32($listCode);';
+              writeCode = '$offsetName = fbBuilder.writeListUint32($listCode);';
             } else if (fieldType.typeName == 'int') {
-              writeCode = '$offsetName = fbBuilder.writeListInt32($valueName);';
+              writeCode = '$offsetName = fbBuilder.writeListUint32($valueName);';
             } else if (fieldType.typeName == 'double') {
               writeCode = '$offsetName = fbBuilder.writeListFloat64($valueName);';
             } else {
               assert(fieldType.typeName == 'String');
               String itemCode = 'fbBuilder.writeString(b)';
               String listCode = '$valueName.map((b) => $itemCode).toList()';
               writeCode = '$offsetName = fbBuilder.writeList($listCode);';
             }
           } else if (fieldType.typeName == 'String') {
             writeCode = '$offsetName = fbBuilder.writeString($valueName);';
@@ skipping 23 matching lines @@
               fieldType.typeName == 'String' ||
               _idl.classes.containsKey(fieldType.typeName)) {
             String offsetName = 'offset_' + field.name;
             condition = '$offsetName != null';
             writeCode = 'fbBuilder.addOffset($index, $offsetName);';
           } else if (fieldType.typeName == 'bool') {
             condition = '$valueName == true';
             writeCode = 'fbBuilder.addBool($index, true);';
           } else if (fieldType.typeName == 'int') {
             condition += ' && $valueName != ${defaultValue(fieldType)}';
-            writeCode = 'fbBuilder.addInt32($index, $valueName);';
+            writeCode = 'fbBuilder.addUint32($index, $valueName);';
           } else if (_idl.enums.containsKey(fieldType.typeName)) {
             condition += ' && $valueName != ${defaultValue(fieldType)}';
-            writeCode = 'fbBuilder.addInt32($index, $valueName.index);';
+            writeCode = 'fbBuilder.addUint32($index, $valueName.index);';
           }
           if (writeCode == null) {
             throw new UnimplementedError('Writing type ${fieldType.typeName}');
           }
           out('if ($condition) {');
           indent(() {
             out(writeCode);
           });
           out('}');
         });
@@ skipping 22 matching lines @@
     out('class $readerName extends fb.Reader<$name> {');
     indent(() {
       out('const $readerName() : super();');
       out();
       out('@override');
       out('int get size => 4;');
       out();
       out('@override');
       out('$name read(fb.BufferPointer bp) {');
       indent(() {
-        out('int index = const fb.Int32Reader().read(bp);');
+        out('int index = const fb.Uint32Reader().read(bp);');
         out('return $name.values[index];');
       });
       out('}');
     });
     out('}');
   }
 
   void _generateImpl(idlModel.ClassDeclaration cls) {
     String name = cls.name;
     String implName = '_${name}Impl';
@@ skipping 13 matching lines @@
       // Write getters.
       cls.fields.asMap().forEach((index, field) {
         String fieldName = field.name;
         idlModel.FieldType type = field.type;
         String typeName = type.typeName;
         // Prepare "readCode" + "def"
         String readCode;
         String def = defaultValue(type);
         if (type.isList) {
           if (typeName == 'int') {
-            String itemCode = 'const fb.Int32Reader()';
+            String itemCode = 'const fb.Uint32Reader()';
             readCode = 'const fb.ListReader<int>($itemCode)';
           } else if (typeName == 'double') {
             readCode = 'const fb.Float64ListReader()';
           } else if (typeName == 'String') {
             String itemCode = 'const fb.StringReader()';
             readCode = 'const fb.ListReader<String>($itemCode)';
           } else if (_idl.classes.containsKey(typeName)) {
             String itemCode = '$typeName>(const _${typeName}Reader()';
             readCode = 'const fb.ListReader<$itemCode)';
           } else {
             assert(_idl.enums.containsKey(typeName));
             String itemCode = 'const _${typeName}Reader()';
             readCode = 'const fb.ListReader<$typeName>($itemCode)';
           }
         } else if (typeName == 'bool') {
           readCode = 'const fb.BoolReader()';
         } else if (typeName == 'int') {
-          readCode = 'const fb.Int32Reader()';
+          readCode = 'const fb.Uint32Reader()';
         } else if (typeName == 'String') {
           readCode = 'const fb.StringReader()';
         } else if (_idl.enums.containsKey(typeName)) {
           readCode = 'const _${typeName}Reader()';
         } else if (_idl.classes.containsKey(typeName)) {
           readCode = 'const _${typeName}Reader()';
         }
         assert(readCode != null);
         // Write the getter implementation.
         out();
@@ skipping 84 matching lines @@
       return token.lexeme.split('\n').map((String line) {
         if (line.startsWith(indent)) {
           line = line.substring(indent.length);
         }
         return line;
       }).join('\n');
     }
     return null;
   }
 }