Add top level type inference logic for integer literals.

pkg/front_end/lib/src/fasta/builder/ast_factory.dart

 // Copyright (c) 2017, 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 'package:kernel/ast.dart';
 
 /// An abstract class containing factory methods that create AST objects.
 ///
 /// Itended for use by [BodyBuilder] so that it can create either analyzer or
 /// kernel ASTs depending on which concrete factory it is connected to.
@@ skipping 18 matching lines @@
 /// having a `toLocation` method on AstFactory that changes tokens to an
 /// abstract type (`int` for kernel, `Token` for analyzer).
 ///
 /// TODO(paulberry): in order to interface with analyzer, we'll need to
 /// shadow-ify [DartType], since analyzer ASTs need to be able to record the
 /// exact tokens that were used to specify a type.
 abstract class AstFactory {
   /// Creates a statement block.
   Block block(List<Statement> statements, int charOffset);
 
+  /// Creates a field.
+  Field field(Name name, int charOffset, {String fileUri});
+
   /// Creates an integer literal.
   IntLiteral intLiteral(value, int charOffset);
 
   /// Creates a list literal expression.
   ///
   /// If the list literal did not have an explicitly declared type argument,
   /// [typeArgument] should be `null`.
   ListLiteral listLiteral(List<Expression> expressions, DartType typeArgument,
       bool isConst, int charOffset);
 
   /// Creates a null literal expression.
   NullLiteral nullLiteral(int charOffset);
 
   /// Creates a return statement.
   Statement returnStatement(Expression expression, int charOffset);
 
+  /// Creates a read of a static variable.
+  StaticGet staticGet(Member readTarget, int offset);
+
   /// Creates a variable declaration statement declaring one variable.
   ///
   /// TODO(paulberry): analyzer makes a distinction between a single variable
   /// declaration and a variable declaration statement (which can contain
   /// multiple variable declarations).  Currently this API only makes sense for
   /// kernel, which desugars each variable declaration to its own statement.
   ///
   /// If the variable declaration did not have an explicitly declared type,
   /// [type] should be `null`.
   VariableDeclaration variableDeclaration(String name,
       {DartType type,
       Expression initializer,
       int charOffset = TreeNode.noOffset,
       int equalsCharOffset = TreeNode.noOffset,
       bool isFinal: false,
       bool isConst: false});
 }