start converting to implicit casting in block arg defs

examples/rosettacode/100-doors.mirah

@@ -47,8 +47,8 @@ end
 
 1.upto(100) do |multiplier|
     index = 0
-    doors.each do |door|
-        Door(door).toggle if (index+1)%multiplier == 0
+    doors.each do |door: Door|
+        door.toggle if (index+1)%multiplier == 0
         index += 1
     end
 end

examples/sort_closure.mirah

@@ -18,5 +18,5 @@ import java.util.ArrayList
 
 list = ArrayList.new [9,5,2,6,8,5,0,3,6,1,8,3,6,4,7,5,0,8,5,6,7,2,3]
 puts "unsorted: #{list}"
-Collections.sort(list) {|a,b| Integer(a).compareTo(Integer(b))}
+Collections.sort(list) {|a: Integer, b: Integer| a.compareTo(b)}
 puts "sorted:   #{list}"

src/org/mirah/jvm/compiler/annotation_compiler.mirah

@@ -153,8 +153,8 @@ class AnnotationCompiler < BaseCompiler
       return
     end
     child = visitor.visitArray(name)
-    values.each do |n|
-      compileValue(child, nil, Node(n), type)
+    values.each do |n: Node|
+      compileValue(child, nil, n, type)
     end
     child.visitEnd
   end

src/org/mirah/jvm/compiler/base_compiler.mirah

@@ -198,7 +198,7 @@ class BaseCompiler < SimpleNodeVisitor
   end
 
   def visitUnquote(node, arg)
-    node.nodes.each {|n| visit(Node(n), arg)}
+    node.nodes.each {|n: Node| visit(n, arg)}
   end
 
   def findType(name:String):JVMType

src/org/mirah/jvm/compiler/bytecode.mirah

@@ -73,8 +73,8 @@ class Bytecode < GeneratorAdapter
 
   def arguments
     args = LinkedList.new
-    @locals.values.each do |info|
-      if LocalInfo(info).index < @firstLocal
+    @locals.values.each do |info: LocalInfo|
+      if info.index < @firstLocal
         args.add(info)
       else
         break

src/org/mirah/jvm/compiler/class_cleanup.mirah

@@ -64,8 +64,7 @@ class ClassCleanup < NodeScanner
         @typer.infer(@cinit, false)
       end
       nodes = NodeList.new
-      @static_init_nodes.each do |n|
-        node = Node(n)
+      @static_init_nodes.each do |node: Node|
         node.parent.removeChild(node)
         node.setParent(nil)  # TODO: ast bug
         nodes.add(node)
@@ -85,13 +84,13 @@ class ClassCleanup < NodeScanner
       NodeList.new(@init_nodes)
     end
     cleanup = ConstructorCleanup.new(@context)
-    @constructors.each do |n|
-      cleanup.clean(ConstructorDefinition(n), init)
+    @constructors.each do |n: ConstructorDefinition|
+      cleanup.clean(n, init)
     end
 
     declareFields
-    @methods.each do |m|
-      addOptionalMethods(MethodDefinition(m))
+    @methods.each do |m: MethodDefinition|
+      addOptionalMethods(m)
     end
   end
 

src/org/mirah/jvm/compiler/closure_transformer.mirah

@@ -652,8 +652,7 @@ end
 
 
   def self.inject_nodes body: NodeList, nodes: List, typer: Typer
-    nodes.each do |arg|
-      node = Node(arg)
+    nodes.each do |node: Node|
       Utils.insert_in_front body, node
       typer.infer node
     end

src/org/mirah/jvm/compiler/method_compiler.mirah

@@ -145,8 +145,7 @@ class MethodCompiler < BaseCompiler
         @builder.dup
         args = AsmType[0]
         @builder.invokeConstructor(type.getAsmType, AsmMethod.new("<init>", AsmType.getType("V"), args))
-        @builder.arguments.each do |_arg|
-          arg = LocalInfo(_arg)
+        @builder.arguments.each do |arg: LocalInfo|
           # Save any captured method arguments into the binding
           if scope.isCaptured(arg.name)
             @builder.dup

src/org/mirah/jvm/compiler/script_cleanup.mirah

@@ -61,8 +61,7 @@ class ScriptCleanup < NodeScanner
       klass = getOrCreateClass(script)
       unless @main_code.isEmpty
         main = @parser.quote { def self.main(ARGV:String[]):void; end }
-        @main_code.each do |n|
-          node = Node(n)
+        @main_code.each do |node: Node|
           node.parent.removeChild(node)
           node.setParent(nil)  # TODO: ast bug
           main.body.add(node)
@@ -73,8 +72,7 @@ class ScriptCleanup < NodeScanner
       end
       unless @methods.isEmpty
         nodes = @parser.quote { class << self; end }
-        @methods.each do |n|
-          mdef = Node(n)
+        @methods.each do |mdef: Node|
           mdef.parent.removeChild(mdef)
           mdef.setParent(nil)  # TODO: ast bug
           nodes.body.add(mdef)

src/org/mirah/jvm/mirrors/base_type.mirah

@@ -105,8 +105,8 @@ class BaseType implements MirrorType, DeclaredType, MethodListener
   def notifyOfIncompatibleChange:void
     @cached_supertypes = List(nil)
     listeners = ArrayList.new(@compatibility_listeners)
-    listeners.each do |l|
-      Runnable(l).run()
+    listeners.each do |l: Runnable|
+      l.run()
     end
     methods = HashSet.new(@method_listeners.keySet)
     methods.each do |n|
@@ -180,8 +180,8 @@ class BaseType implements MirrorType, DeclaredType, MethodListener
   def getAllDeclaredMethods
     @methods_loaded ||= load_methods
     methods = ArrayList.new
-    @members.values.each do |list|
-      List(list).each do |m|
+    @members.values.each do |list: List|
+      list.each do |m|
         methods.add(m)
       end
     end
@@ -224,8 +224,8 @@ class BaseType implements MirrorType, DeclaredType, MethodListener
   def invalidateMethod(name:String)
     listeners = Set(@method_listeners[name])
     if listeners
-      HashSet.new(listeners).each do |l|
-        MethodListener(l).methodChanged(self, name)
+      HashSet.new(listeners).each do |l: MethodListener|
+        l.methodChanged(self, name)
       end
     end
   end

src/org/mirah/jvm/mirrors/bytecode_mirror.mirah

@@ -135,8 +135,7 @@ class BytecodeMirror < AsyncMirror implements DeclaredMirrorType
     # CLASS is the default retention policy http://docs.oracle.com/javase/7/docs/api/java/lang/annotation/RetentionPolicy.html#CLASS
     return "CLASS" unless @annotations
 
-    @annotations.each do |n|
-      anno = AnnotationNode(n)
+    @annotations.each do |anno: AnnotationNode|
       if "Ljava/lang/annotation/Retention;".equals(anno.desc)
         # anno.values should be
         # ["value", ["Ljava/lang/annotation/RetentionPolicy;", policy]]
@@ -149,12 +148,12 @@ class BytecodeMirror < AsyncMirror implements DeclaredMirrorType
   attr_reader signature:String
 
   def load_methods:boolean
-    @methods.each do |m|
-      addMethod(MethodNode(m))
+    @methods.each do |m: MethodNode|
+      addMethod(m)
     end if @methods
     @methods = nil
-    @innerClassNodes.each do |n|
-      addInnerClass(InnerClassNode(n))
+    @innerClassNodes.each do |n: InnerClassNode|
+      addInnerClass(n)
     end
     true
   end
@@ -198,8 +197,7 @@ class BytecodeMirror < AsyncMirror implements DeclaredMirrorType
     @methods_loaded ||= load_methods
     members = getMembers(name)
     if members
-      members.each do |m|
-        member = Member(m)
+      members.each do |member: Member|
         if member.argumentTypes.equals(params)
           return member
         end

src/org/mirah/jvm/mirrors/jvm_scope.mirah

@@ -92,7 +92,7 @@ class JVMScope < SimpleScope
     elsif @parent && @parent.hasLocal(name)
       return true
     else
-      return @children.any? {|child| JVMScope(child).hasLocal(name, false)}
+      return @children.any? {|child: JVMScope| child.hasLocal(name, false)}
     end
   end
 

src/org/mirah/jvm/mirrors/member.mirah

@@ -135,7 +135,7 @@ class AsyncMember < Member
     @futures = argumentTypes
     @resolvedArguments = ArrayList.new(argumentTypes.size)
     @returnType = returnType
-    argumentTypes.each {|a| setupArgumentListener(TypeFuture(a)) }
+    argumentTypes.each {|a: TypeFuture| setupArgumentListener(a) }
   end
 
   def argumentTypes