1 files changed, 0 insertions, 386 deletions
diff --git a/src/pkg/go/ast/walk.go b/src/pkg/go/ast/walk.go
deleted file mode 100644
index 73ac38647..000000000
--- a/src/pkg/go/ast/walk.go
+++ /dev/null
@@ -1,386 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package ast
-
-import "fmt"
-
-// A Visitor's Visit method is invoked for each node encountered by Walk.
-// If the result visitor w is not nil, Walk visits each of the children
-// of node with the visitor w, followed by a call of w.Visit(nil).
-type Visitor interface {
-	Visit(node Node) (w Visitor)
-}
-
-// Helper functions for common node lists. They may be empty.
-
-func walkIdentList(v Visitor, list []*Ident) {
-	for _, x := range list {
-		Walk(v, x)
-	}
-}
-
-func walkExprList(v Visitor, list []Expr) {
-	for _, x := range list {
-		Walk(v, x)
-	}
-}
-
-func walkStmtList(v Visitor, list []Stmt) {
-	for _, x := range list {
-		Walk(v, x)
-	}
-}
-
-func walkDeclList(v Visitor, list []Decl) {
-	for _, x := range list {
-		Walk(v, x)
-	}
-}
-
-// TODO(gri): Investigate if providing a closure to Walk leads to
-//            simpler use (and may help eliminate Inspect in turn).
-
-// Walk traverses an AST in depth-first order: It starts by calling
-// v.Visit(node); node must not be nil. If the visitor w returned by
-// v.Visit(node) is not nil, Walk is invoked recursively with visitor
-// w for each of the non-nil children of node, followed by a call of
-// w.Visit(nil).
-//
-func Walk(v Visitor, node Node) {
-	if v = v.Visit(node); v == nil {
-		return
-	}
-
-	// walk children
-	// (the order of the cases matches the order
-	// of the corresponding node types in ast.go)
-	switch n := node.(type) {
-	// Comments and fields
-	case *Comment:
-		// nothing to do
-
-	case *CommentGroup:
-		for _, c := range n.List {
-			Walk(v, c)
-		}
-
-	case *Field:
-		if n.Doc != nil {
-			Walk(v, n.Doc)
-		}
-		walkIdentList(v, n.Names)
-		Walk(v, n.Type)
-		if n.Tag != nil {
-			Walk(v, n.Tag)
-		}
-		if n.Comment != nil {
-			Walk(v, n.Comment)
-		}
-
-	case *FieldList:
-		for _, f := range n.List {
-			Walk(v, f)
-		}
-
-	// Expressions
-	case *BadExpr, *Ident, *BasicLit:
-		// nothing to do
-
-	case *Ellipsis:
-		if n.Elt != nil {
-			Walk(v, n.Elt)
-		}
-
-	case *FuncLit:
-		Walk(v, n.Type)
-		Walk(v, n.Body)
-
-	case *CompositeLit:
-		if n.Type != nil {
-			Walk(v, n.Type)
-		}
-		walkExprList(v, n.Elts)
-
-	case *ParenExpr:
-		Walk(v, n.X)
-
-	case *SelectorExpr:
-		Walk(v, n.X)
-		Walk(v, n.Sel)
-
-	case *IndexExpr:
-		Walk(v, n.X)
-		Walk(v, n.Index)
-
-	case *SliceExpr:
-		Walk(v, n.X)
-		if n.Low != nil {
-			Walk(v, n.Low)
-		}
-		if n.High != nil {
-			Walk(v, n.High)
-		}
-		if n.Max != nil {
-			Walk(v, n.Max)
-		}
-
-	case *TypeAssertExpr:
-		Walk(v, n.X)
-		if n.Type != nil {
-			Walk(v, n.Type)
-		}
-
-	case *CallExpr:
-		Walk(v, n.Fun)
-		walkExprList(v, n.Args)
-
-	case *StarExpr:
-		Walk(v, n.X)
-
-	case *UnaryExpr:
-		Walk(v, n.X)
-
-	case *BinaryExpr:
-		Walk(v, n.X)
-		Walk(v, n.Y)
-
-	case *KeyValueExpr:
-		Walk(v, n.Key)
-		Walk(v, n.Value)
-
-	// Types
-	case *ArrayType:
-		if n.Len != nil {
-			Walk(v, n.Len)
-		}
-		Walk(v, n.Elt)
-
-	case *StructType:
-		Walk(v, n.Fields)
-
-	case *FuncType:
-		if n.Params != nil {
-			Walk(v, n.Params)
-		}
-		if n.Results != nil {
-			Walk(v, n.Results)
-		}
-
-	case *InterfaceType:
-		Walk(v, n.Methods)
-
-	case *MapType:
-		Walk(v, n.Key)
-		Walk(v, n.Value)
-
-	case *ChanType:
-		Walk(v, n.Value)
-
-	// Statements
-	case *BadStmt:
-		// nothing to do
-
-	case *DeclStmt:
-		Walk(v, n.Decl)
-
-	case *EmptyStmt:
-		// nothing to do
-
-	case *LabeledStmt:
-		Walk(v, n.Label)
-		Walk(v, n.Stmt)
-
-	case *ExprStmt:
-		Walk(v, n.X)
-
-	case *SendStmt:
-		Walk(v, n.Chan)
-		Walk(v, n.Value)
-
-	case *IncDecStmt:
-		Walk(v, n.X)
-
-	case *AssignStmt:
-		walkExprList(v, n.Lhs)
-		walkExprList(v, n.Rhs)
-
-	case *GoStmt:
-		Walk(v, n.Call)
-
-	case *DeferStmt:
-		Walk(v, n.Call)
-
-	case *ReturnStmt:
-		walkExprList(v, n.Results)
-
-	case *BranchStmt:
-		if n.Label != nil {
-			Walk(v, n.Label)
-		}
-
-	case *BlockStmt:
-		walkStmtList(v, n.List)
-
-	case *IfStmt:
-		if n.Init != nil {
-			Walk(v, n.Init)
-		}
-		Walk(v, n.Cond)
-		Walk(v, n.Body)
-		if n.Else != nil {
-			Walk(v, n.Else)
-		}
-
-	case *CaseClause:
-		walkExprList(v, n.List)
-		walkStmtList(v, n.Body)
-
-	case *SwitchStmt:
-		if n.Init != nil {
-			Walk(v, n.Init)
-		}
-		if n.Tag != nil {
-			Walk(v, n.Tag)
-		}
-		Walk(v, n.Body)
-
-	case *TypeSwitchStmt:
-		if n.Init != nil {
-			Walk(v, n.Init)
-		}
-		Walk(v, n.Assign)
-		Walk(v, n.Body)
-
-	case *CommClause:
-		if n.Comm != nil {
-			Walk(v, n.Comm)
-		}
-		walkStmtList(v, n.Body)
-
-	case *SelectStmt:
-		Walk(v, n.Body)
-
-	case *ForStmt:
-		if n.Init != nil {
-			Walk(v, n.Init)
-		}
-		if n.Cond != nil {
-			Walk(v, n.Cond)
-		}
-		if n.Post != nil {
-			Walk(v, n.Post)
-		}
-		Walk(v, n.Body)
-
-	case *RangeStmt:
-		if n.Key != nil {
-			Walk(v, n.Key)
-		}
-		if n.Value != nil {
-			Walk(v, n.Value)
-		}
-		Walk(v, n.X)
-		Walk(v, n.Body)
-
-	// Declarations
-	case *ImportSpec:
-		if n.Doc != nil {
-			Walk(v, n.Doc)
-		}
-		if n.Name != nil {
-			Walk(v, n.Name)
-		}
-		Walk(v, n.Path)
-		if n.Comment != nil {
-			Walk(v, n.Comment)
-		}
-
-	case *ValueSpec:
-		if n.Doc != nil {
-			Walk(v, n.Doc)
-		}
-		walkIdentList(v, n.Names)
-		if n.Type != nil {
-			Walk(v, n.Type)
-		}
-		walkExprList(v, n.Values)
-		if n.Comment != nil {
-			Walk(v, n.Comment)
-		}
-
-	case *TypeSpec:
-		if n.Doc != nil {
-			Walk(v, n.Doc)
-		}
-		Walk(v, n.Name)
-		Walk(v, n.Type)
-		if n.Comment != nil {
-			Walk(v, n.Comment)
-		}
-
-	case *BadDecl:
-		// nothing to do
-
-	case *GenDecl:
-		if n.Doc != nil {
-			Walk(v, n.Doc)
-		}
-		for _, s := range n.Specs {
-			Walk(v, s)
-		}
-
-	case *FuncDecl:
-		if n.Doc != nil {
-			Walk(v, n.Doc)
-		}
-		if n.Recv != nil {
-			Walk(v, n.Recv)
-		}
-		Walk(v, n.Name)
-		Walk(v, n.Type)
-		if n.Body != nil {
-			Walk(v, n.Body)
-		}
-
-	// Files and packages
-	case *File:
-		if n.Doc != nil {
-			Walk(v, n.Doc)
-		}
-		Walk(v, n.Name)
-		walkDeclList(v, n.Decls)
-		// don't walk n.Comments - they have been
-		// visited already through the individual
-		// nodes
-
-	case *Package:
-		for _, f := range n.Files {
-			Walk(v, f)
-		}
-
-	default:
-		fmt.Printf("ast.Walk: unexpected node type %T", n)
-		panic("ast.Walk")
-	}
-
-	v.Visit(nil)
-}
-
-type inspector func(Node) bool
-
-func (f inspector) Visit(node Node) Visitor {
-	if f(node) {
-		return f
-	}
-	return nil
-}
-
-// Inspect traverses an AST in depth-first order: It starts by calling
-// f(node); node must not be nil. If f returns true, Inspect invokes f
-// for all the non-nil children of node, recursively.
-//
-func Inspect(node Node, f func(Node) bool) {
-	Walk(inspector(f), node)
-}