1 files changed, 0 insertions, 251 deletions
diff --git a/src/pkg/go/ast/print.go b/src/pkg/go/ast/print.go
deleted file mode 100644
index f15dc11dc..000000000
--- a/src/pkg/go/ast/print.go
+++ /dev/null
@@ -1,251 +0,0 @@
-// Copyright 2010 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.
-
-// This file contains printing support for ASTs.
-
-package ast
-
-import (
-	"fmt"
-	"go/token"
-	"io"
-	"os"
-	"reflect"
-)
-
-// A FieldFilter may be provided to Fprint to control the output.
-type FieldFilter func(name string, value reflect.Value) bool
-
-// NotNilFilter returns true for field values that are not nil;
-// it returns false otherwise.
-func NotNilFilter(_ string, v reflect.Value) bool {
-	switch v.Kind() {
-	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
-		return !v.IsNil()
-	}
-	return true
-}
-
-// Fprint prints the (sub-)tree starting at AST node x to w.
-// If fset != nil, position information is interpreted relative
-// to that file set. Otherwise positions are printed as integer
-// values (file set specific offsets).
-//
-// A non-nil FieldFilter f may be provided to control the output:
-// struct fields for which f(fieldname, fieldvalue) is true are
-// printed; all others are filtered from the output. Unexported
-// struct fields are never printed.
-//
-func Fprint(w io.Writer, fset *token.FileSet, x interface{}, f FieldFilter) (err error) {
-	// setup printer
-	p := printer{
-		output: w,
-		fset:   fset,
-		filter: f,
-		ptrmap: make(map[interface{}]int),
-		last:   '\n', // force printing of line number on first line
-	}
-
-	// install error handler
-	defer func() {
-		if e := recover(); e != nil {
-			err = e.(localError).err // re-panics if it's not a localError
-		}
-	}()
-
-	// print x
-	if x == nil {
-		p.printf("nil\n")
-		return
-	}
-	p.print(reflect.ValueOf(x))
-	p.printf("\n")
-
-	return
-}
-
-// Print prints x to standard output, skipping nil fields.
-// Print(fset, x) is the same as Fprint(os.Stdout, fset, x, NotNilFilter).
-func Print(fset *token.FileSet, x interface{}) error {
-	return Fprint(os.Stdout, fset, x, NotNilFilter)
-}
-
-type printer struct {
-	output io.Writer
-	fset   *token.FileSet
-	filter FieldFilter
-	ptrmap map[interface{}]int // *T -> line number
-	indent int                 // current indentation level
-	last   byte                // the last byte processed by Write
-	line   int                 // current line number
-}
-
-var indent = []byte(".  ")
-
-func (p *printer) Write(data []byte) (n int, err error) {
-	var m int
-	for i, b := range data {
-		// invariant: data[0:n] has been written
-		if b == '\n' {
-			m, err = p.output.Write(data[n : i+1])
-			n += m
-			if err != nil {
-				return
-			}
-			p.line++
-		} else if p.last == '\n' {
-			_, err = fmt.Fprintf(p.output, "%6d  ", p.line)
-			if err != nil {
-				return
-			}
-			for j := p.indent; j > 0; j-- {
-				_, err = p.output.Write(indent)
-				if err != nil {
-					return
-				}
-			}
-		}
-		p.last = b
-	}
-	if len(data) > n {
-		m, err = p.output.Write(data[n:])
-		n += m
-	}
-	return
-}
-
-// localError wraps locally caught errors so we can distinguish
-// them from genuine panics which we don't want to return as errors.
-type localError struct {
-	err error
-}
-
-// printf is a convenience wrapper that takes care of print errors.
-func (p *printer) printf(format string, args ...interface{}) {
-	if _, err := fmt.Fprintf(p, format, args...); err != nil {
-		panic(localError{err})
-	}
-}
-
-// Implementation note: Print is written for AST nodes but could be
-// used to print arbitrary data structures; such a version should
-// probably be in a different package.
-//
-// Note: This code detects (some) cycles created via pointers but
-// not cycles that are created via slices or maps containing the
-// same slice or map. Code for general data structures probably
-// should catch those as well.
-
-func (p *printer) print(x reflect.Value) {
-	if !NotNilFilter("", x) {
-		p.printf("nil")
-		return
-	}
-
-	switch x.Kind() {
-	case reflect.Interface:
-		p.print(x.Elem())
-
-	case reflect.Map:
-		p.printf("%s (len = %d) {", x.Type(), x.Len())
-		if x.Len() > 0 {
-			p.indent++
-			p.printf("\n")
-			for _, key := range x.MapKeys() {
-				p.print(key)
-				p.printf(": ")
-				p.print(x.MapIndex(key))
-				p.printf("\n")
-			}
-			p.indent--
-		}
-		p.printf("}")
-
-	case reflect.Ptr:
-		p.printf("*")
-		// type-checked ASTs may contain cycles - use ptrmap
-		// to keep track of objects that have been printed
-		// already and print the respective line number instead
-		ptr := x.Interface()
-		if line, exists := p.ptrmap[ptr]; exists {
-			p.printf("(obj @ %d)", line)
-		} else {
-			p.ptrmap[ptr] = p.line
-			p.print(x.Elem())
-		}
-
-	case reflect.Array:
-		p.printf("%s {", x.Type())
-		if x.Len() > 0 {
-			p.indent++
-			p.printf("\n")
-			for i, n := 0, x.Len(); i < n; i++ {
-				p.printf("%d: ", i)
-				p.print(x.Index(i))
-				p.printf("\n")
-			}
-			p.indent--
-		}
-		p.printf("}")
-
-	case reflect.Slice:
-		if s, ok := x.Interface().([]byte); ok {
-			p.printf("%#q", s)
-			return
-		}
-		p.printf("%s (len = %d) {", x.Type(), x.Len())
-		if x.Len() > 0 {
-			p.indent++
-			p.printf("\n")
-			for i, n := 0, x.Len(); i < n; i++ {
-				p.printf("%d: ", i)
-				p.print(x.Index(i))
-				p.printf("\n")
-			}
-			p.indent--
-		}
-		p.printf("}")
-
-	case reflect.Struct:
-		t := x.Type()
-		p.printf("%s {", t)
-		p.indent++
-		first := true
-		for i, n := 0, t.NumField(); i < n; i++ {
-			// exclude non-exported fields because their
-			// values cannot be accessed via reflection
-			if name := t.Field(i).Name; IsExported(name) {
-				value := x.Field(i)
-				if p.filter == nil || p.filter(name, value) {
-					if first {
-						p.printf("\n")
-						first = false
-					}
-					p.printf("%s: ", name)
-					p.print(value)
-					p.printf("\n")
-				}
-			}
-		}
-		p.indent--
-		p.printf("}")
-
-	default:
-		v := x.Interface()
-		switch v := v.(type) {
-		case string:
-			// print strings in quotes
-			p.printf("%q", v)
-			return
-		case token.Pos:
-			// position values can be printed nicely if we have a file set
-			if p.fset != nil {
-				p.printf("%s", p.fset.Position(v))
-				return
-			}
-		}
-		// default
-		p.printf("%v", v)
-	}
-}