remove uses of *T as an implicit forward declaration of T

R=gri,r
OCL=16648
CL=16652

src/lib/flag.go

@@ -98,6 +98,12 @@ func atob(str string) (value bool, ok bool) {
 	return false, false
 }
 
+type (
+	BoolValue struct;
+	IntValue struct;
+	StringValue struct;
+)
+
 // -- Bool Value
 type BoolValue struct {
 	val bool;

test/bugs/bug041.go

@@ -6,6 +6,7 @@
 
 package main
 
+type T struct
 type S struct {
   p *T  // BUG T never declared
 }

test/fixedbugs/bug066.go

@@ -6,6 +6,10 @@
 
 package main
 
+type (
+	Type struct;
+	Object struct;
+)
 
 type Scope struct {
 	entries *map[string] *Object;

test/ken/rob2.go

@@ -9,6 +9,12 @@ package main
 
 const nilchar = 0;
 
+type (
+	Atom struct;
+	List struct;
+	Slist struct;
+)
+
 type Atom struct {
 	str		string;
 	integer		int;

usr/gri/gosrc/globals.go

@@ -13,6 +13,11 @@ package Globals
 
 // ----------------------------------------------------------------------------
 
+type Type struct
+type Scope struct
+type Elem struct
+type Compilation struct
+
 export type Object struct {
 	exported bool;
 	pos int;  // source position (< 0 if unknown position)

usr/gri/pretty/ast.go

@@ -8,6 +8,49 @@ package AST
 // ----------------------------------------------------------------------------
 // Visitor
 
+type (
+	Nil struct;
+	Ident struct;
+	ArrayType struct;
+	StructType struct;
+	MapType struct;
+	ChannelType struct;
+	PointerType struct;
+	InterfaceType struct;
+	FunctionType struct;
+	VarDeclList struct;
+	ImportDecl struct;
+	ConstDecl struct;
+	TypeDecl struct;
+	VarDecl struct;
+	Declaration struct;
+	FuncDecl struct;
+	MethodDecl struct;
+	Selector struct;
+	Index struct;
+	Call struct;
+	Pair struct;
+	Binary struct;
+	Unary struct;
+	Literal struct;
+	CompositeLit struct;
+	FunctionLit struct;
+	Label struct;
+	Block struct;
+	ExprStat struct;
+	Assignment struct;
+	ControlClause struct;
+	IfStat struct;
+	ForStat struct;
+	CaseClause struct;
+	SwitchStat struct;
+	ReturnStat struct;
+	IncDecStat struct;
+	ControlFlowStat struct;
+	GoStat struct;
+	Program struct;
+)
+
 export type Visitor interface {
 	// Basics
 	DoNil(x *Nil);