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747 |
jeremybenn |
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package fmt
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import (
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"bytes"
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"errors"
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"io"
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"os"
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"reflect"
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"sync"
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"unicode"
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"unicode/utf8"
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)
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// Some constants in the form of bytes, to avoid string overhead.
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// Needlessly fastidious, I suppose.
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var (
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commaSpaceBytes = []byte(", ")
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nilAngleBytes = []byte("")
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nilParenBytes = []byte("(nil)")
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nilBytes = []byte("nil")
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mapBytes = []byte("map[")
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missingBytes = []byte("(MISSING)")
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panicBytes = []byte("(PANIC=")
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extraBytes = []byte("%!(EXTRA ")
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irparenBytes = []byte("i)")
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bytesBytes = []byte("[]byte{")
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widthBytes = []byte("%!(BADWIDTH)")
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precBytes = []byte("%!(BADPREC)")
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noVerbBytes = []byte("%!(NOVERB)")
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)
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// State represents the printer state passed to custom formatters.
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// It provides access to the io.Writer interface plus information about
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// the flags and options for the operand's format specifier.
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type State interface {
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// Write is the function to call to emit formatted output to be printed.
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Write(b []byte) (ret int, err error)
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// Width returns the value of the width option and whether it has been set.
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Width() (wid int, ok bool)
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// Precision returns the value of the precision option and whether it has been set.
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Precision() (prec int, ok bool)
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// Flag returns whether the flag c, a character, has been set.
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Flag(c int) bool
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}
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// Formatter is the interface implemented by values with a custom formatter.
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// The implementation of Format may call Sprintf or Fprintf(f) etc.
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// to generate its output.
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type Formatter interface {
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Format(f State, c rune)
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}
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// Stringer is implemented by any value that has a String method,
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// which defines the ``native'' format for that value.
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// The String method is used to print values passed as an operand
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// to a %s or %v format or to an unformatted printer such as Print.
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type Stringer interface {
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String() string
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}
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// GoStringer is implemented by any value that has a GoString method,
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// which defines the Go syntax for that value.
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// The GoString method is used to print values passed as an operand
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// to a %#v format.
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type GoStringer interface {
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GoString() string
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}
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type pp struct {
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n int
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panicking bool
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erroring bool // printing an error condition
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buf bytes.Buffer
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// field holds the current item, as an interface{}.
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field interface{}
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// value holds the current item, as a reflect.Value, and will be
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// the zero Value if the item has not been reflected.
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value reflect.Value
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runeBuf [utf8.UTFMax]byte
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fmt fmt
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}
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// A cache holds a set of reusable objects.
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// The slice is a stack (LIFO).
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// If more are needed, the cache creates them by calling new.
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type cache struct {
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mu sync.Mutex
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saved []interface{}
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new func() interface{}
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}
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func (c *cache) put(x interface{}) {
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c.mu.Lock()
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if len(c.saved) < cap(c.saved) {
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c.saved = append(c.saved, x)
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}
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c.mu.Unlock()
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}
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func (c *cache) get() interface{} {
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c.mu.Lock()
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n := len(c.saved)
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if n == 0 {
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c.mu.Unlock()
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return c.new()
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}
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x := c.saved[n-1]
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c.saved = c.saved[0 : n-1]
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c.mu.Unlock()
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return x
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}
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func newCache(f func() interface{}) *cache {
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return &cache{saved: make([]interface{}, 0, 100), new: f}
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}
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var ppFree = newCache(func() interface{} { return new(pp) })
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// Allocate a new pp struct or grab a cached one.
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func newPrinter() *pp {
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p := ppFree.get().(*pp)
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p.panicking = false
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p.erroring = false
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p.fmt.init(&p.buf)
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return p
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}
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// Save used pp structs in ppFree; avoids an allocation per invocation.
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func (p *pp) free() {
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// Don't hold on to pp structs with large buffers.
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if cap(p.buf.Bytes()) > 1024 {
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return
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}
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p.buf.Reset()
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p.field = nil
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p.value = reflect.Value{}
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ppFree.put(p)
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}
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func (p *pp) Width() (wid int, ok bool) { return p.fmt.wid, p.fmt.widPresent }
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func (p *pp) Precision() (prec int, ok bool) { return p.fmt.prec, p.fmt.precPresent }
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func (p *pp) Flag(b int) bool {
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switch b {
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case '-':
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return p.fmt.minus
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case '+':
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return p.fmt.plus
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case '#':
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return p.fmt.sharp
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case ' ':
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return p.fmt.space
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case '0':
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return p.fmt.zero
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}
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return false
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}
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func (p *pp) add(c rune) {
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p.buf.WriteRune(c)
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}
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// Implement Write so we can call Fprintf on a pp (through State), for
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// recursive use in custom verbs.
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func (p *pp) Write(b []byte) (ret int, err error) {
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return p.buf.Write(b)
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}
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// These routines end in 'f' and take a format string.
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// Fprintf formats according to a format specifier and writes to w.
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// It returns the number of bytes written and any write error encountered.
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func Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error) {
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p := newPrinter()
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p.doPrintf(format, a)
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n64, err := p.buf.WriteTo(w)
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p.free()
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return int(n64), err
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}
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// Printf formats according to a format specifier and writes to standard output.
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// It returns the number of bytes written and any write error encountered.
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func Printf(format string, a ...interface{}) (n int, err error) {
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return Fprintf(os.Stdout, format, a...)
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}
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// Sprintf formats according to a format specifier and returns the resulting string.
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func Sprintf(format string, a ...interface{}) string {
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p := newPrinter()
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p.doPrintf(format, a)
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s := p.buf.String()
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p.free()
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return s
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}
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// Errorf formats according to a format specifier and returns the string
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// as a value that satisfies error.
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func Errorf(format string, a ...interface{}) error {
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return errors.New(Sprintf(format, a...))
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}
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// These routines do not take a format string
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// Fprint formats using the default formats for its operands and writes to w.
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// Spaces are added between operands when neither is a string.
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// It returns the number of bytes written and any write error encountered.
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func Fprint(w io.Writer, a ...interface{}) (n int, err error) {
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p := newPrinter()
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p.doPrint(a, false, false)
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n64, err := p.buf.WriteTo(w)
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p.free()
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return int(n64), err
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}
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// Print formats using the default formats for its operands and writes to standard output.
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// Spaces are added between operands when neither is a string.
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// It returns the number of bytes written and any write error encountered.
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func Print(a ...interface{}) (n int, err error) {
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return Fprint(os.Stdout, a...)
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}
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// Sprint formats using the default formats for its operands and returns the resulting string.
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// Spaces are added between operands when neither is a string.
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func Sprint(a ...interface{}) string {
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p := newPrinter()
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p.doPrint(a, false, false)
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s := p.buf.String()
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p.free()
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return s
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}
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// These routines end in 'ln', do not take a format string,
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// always add spaces between operands, and add a newline
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// after the last operand.
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// Fprintln formats using the default formats for its operands and writes to w.
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// Spaces are always added between operands and a newline is appended.
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// It returns the number of bytes written and any write error encountered.
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func Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
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p := newPrinter()
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p.doPrint(a, true, true)
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n64, err := p.buf.WriteTo(w)
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p.free()
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return int(n64), err
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}
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// Println formats using the default formats for its operands and writes to standard output.
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// Spaces are always added between operands and a newline is appended.
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// It returns the number of bytes written and any write error encountered.
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func Println(a ...interface{}) (n int, err error) {
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return Fprintln(os.Stdout, a...)
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}
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// Sprintln formats using the default formats for its operands and returns the resulting string.
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// Spaces are always added between operands and a newline is appended.
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func Sprintln(a ...interface{}) string {
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p := newPrinter()
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p.doPrint(a, true, true)
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s := p.buf.String()
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p.free()
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return s
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}
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// Get the i'th arg of the struct value.
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// If the arg itself is an interface, return a value for
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// the thing inside the interface, not the interface itself.
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func getField(v reflect.Value, i int) reflect.Value {
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val := v.Field(i)
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if val.Kind() == reflect.Interface && !val.IsNil() {
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val = val.Elem()
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}
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return val
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}
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// Convert ASCII to integer. n is 0 (and got is false) if no number present.
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func parsenum(s string, start, end int) (num int, isnum bool, newi int) {
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if start >= end {
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return 0, false, end
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}
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for newi = start; newi < end && '0' <= s[newi] && s[newi] <= '9'; newi++ {
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num = num*10 + int(s[newi]-'0')
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isnum = true
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}
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return
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}
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func (p *pp) unknownType(v interface{}) {
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| 294 |
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if v == nil {
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p.buf.Write(nilAngleBytes)
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return
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}
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| 298 |
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p.buf.WriteByte('?')
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| 299 |
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p.buf.WriteString(reflect.TypeOf(v).String())
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| 300 |
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p.buf.WriteByte('?')
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}
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| 302 |
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func (p *pp) badVerb(verb rune) {
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p.erroring = true
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p.add('%')
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p.add('!')
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p.add(verb)
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p.add('(')
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switch {
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case p.field != nil:
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p.buf.WriteString(reflect.TypeOf(p.field).String())
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| 312 |
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p.add('=')
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p.printField(p.field, 'v', false, false, 0)
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| 314 |
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case p.value.IsValid():
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p.buf.WriteString(p.value.Type().String())
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p.add('=')
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p.printValue(p.value, 'v', false, false, 0)
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default:
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| 319 |
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p.buf.Write(nilAngleBytes)
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}
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p.add(')')
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p.erroring = false
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}
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func (p *pp) fmtBool(v bool, verb rune) {
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| 326 |
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switch verb {
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case 't', 'v':
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p.fmt.fmt_boolean(v)
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default:
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p.badVerb(verb)
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}
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}
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| 333 |
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| 334 |
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// fmtC formats a rune for the 'c' format.
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| 335 |
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func (p *pp) fmtC(c int64) {
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| 336 |
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r := rune(c) // Check for overflow.
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if int64(r) != c {
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r = utf8.RuneError
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}
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w := utf8.EncodeRune(p.runeBuf[0:utf8.UTFMax], r)
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p.fmt.pad(p.runeBuf[0:w])
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}
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| 343 |
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| 344 |
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func (p *pp) fmtInt64(v int64, verb rune) {
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| 345 |
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switch verb {
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| 346 |
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case 'b':
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| 347 |
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p.fmt.integer(v, 2, signed, ldigits)
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| 348 |
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case 'c':
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| 349 |
|
|
p.fmtC(v)
|
| 350 |
|
|
case 'd', 'v':
|
| 351 |
|
|
p.fmt.integer(v, 10, signed, ldigits)
|
| 352 |
|
|
case 'o':
|
| 353 |
|
|
p.fmt.integer(v, 8, signed, ldigits)
|
| 354 |
|
|
case 'q':
|
| 355 |
|
|
if 0 <= v && v <= unicode.MaxRune {
|
| 356 |
|
|
p.fmt.fmt_qc(v)
|
| 357 |
|
|
} else {
|
| 358 |
|
|
p.badVerb(verb)
|
| 359 |
|
|
}
|
| 360 |
|
|
case 'x':
|
| 361 |
|
|
p.fmt.integer(v, 16, signed, ldigits)
|
| 362 |
|
|
case 'U':
|
| 363 |
|
|
p.fmtUnicode(v)
|
| 364 |
|
|
case 'X':
|
| 365 |
|
|
p.fmt.integer(v, 16, signed, udigits)
|
| 366 |
|
|
default:
|
| 367 |
|
|
p.badVerb(verb)
|
| 368 |
|
|
}
|
| 369 |
|
|
}
|
| 370 |
|
|
|
| 371 |
|
|
// fmt0x64 formats a uint64 in hexadecimal and prefixes it with 0x or
|
| 372 |
|
|
// not, as requested, by temporarily setting the sharp flag.
|
| 373 |
|
|
func (p *pp) fmt0x64(v uint64, leading0x bool) {
|
| 374 |
|
|
sharp := p.fmt.sharp
|
| 375 |
|
|
p.fmt.sharp = leading0x
|
| 376 |
|
|
p.fmt.integer(int64(v), 16, unsigned, ldigits)
|
| 377 |
|
|
p.fmt.sharp = sharp
|
| 378 |
|
|
}
|
| 379 |
|
|
|
| 380 |
|
|
// fmtUnicode formats a uint64 in U+1234 form by
|
| 381 |
|
|
// temporarily turning on the unicode flag and tweaking the precision.
|
| 382 |
|
|
func (p *pp) fmtUnicode(v int64) {
|
| 383 |
|
|
precPresent := p.fmt.precPresent
|
| 384 |
|
|
sharp := p.fmt.sharp
|
| 385 |
|
|
p.fmt.sharp = false
|
| 386 |
|
|
prec := p.fmt.prec
|
| 387 |
|
|
if !precPresent {
|
| 388 |
|
|
// If prec is already set, leave it alone; otherwise 4 is minimum.
|
| 389 |
|
|
p.fmt.prec = 4
|
| 390 |
|
|
p.fmt.precPresent = true
|
| 391 |
|
|
}
|
| 392 |
|
|
p.fmt.unicode = true // turn on U+
|
| 393 |
|
|
p.fmt.uniQuote = sharp
|
| 394 |
|
|
p.fmt.integer(int64(v), 16, unsigned, udigits)
|
| 395 |
|
|
p.fmt.unicode = false
|
| 396 |
|
|
p.fmt.uniQuote = false
|
| 397 |
|
|
p.fmt.prec = prec
|
| 398 |
|
|
p.fmt.precPresent = precPresent
|
| 399 |
|
|
p.fmt.sharp = sharp
|
| 400 |
|
|
}
|
| 401 |
|
|
|
| 402 |
|
|
func (p *pp) fmtUint64(v uint64, verb rune, goSyntax bool) {
|
| 403 |
|
|
switch verb {
|
| 404 |
|
|
case 'b':
|
| 405 |
|
|
p.fmt.integer(int64(v), 2, unsigned, ldigits)
|
| 406 |
|
|
case 'c':
|
| 407 |
|
|
p.fmtC(int64(v))
|
| 408 |
|
|
case 'd':
|
| 409 |
|
|
p.fmt.integer(int64(v), 10, unsigned, ldigits)
|
| 410 |
|
|
case 'v':
|
| 411 |
|
|
if goSyntax {
|
| 412 |
|
|
p.fmt0x64(v, true)
|
| 413 |
|
|
} else {
|
| 414 |
|
|
p.fmt.integer(int64(v), 10, unsigned, ldigits)
|
| 415 |
|
|
}
|
| 416 |
|
|
case 'o':
|
| 417 |
|
|
p.fmt.integer(int64(v), 8, unsigned, ldigits)
|
| 418 |
|
|
case 'q':
|
| 419 |
|
|
if 0 <= v && v <= unicode.MaxRune {
|
| 420 |
|
|
p.fmt.fmt_qc(int64(v))
|
| 421 |
|
|
} else {
|
| 422 |
|
|
p.badVerb(verb)
|
| 423 |
|
|
}
|
| 424 |
|
|
case 'x':
|
| 425 |
|
|
p.fmt.integer(int64(v), 16, unsigned, ldigits)
|
| 426 |
|
|
case 'X':
|
| 427 |
|
|
p.fmt.integer(int64(v), 16, unsigned, udigits)
|
| 428 |
|
|
case 'U':
|
| 429 |
|
|
p.fmtUnicode(int64(v))
|
| 430 |
|
|
default:
|
| 431 |
|
|
p.badVerb(verb)
|
| 432 |
|
|
}
|
| 433 |
|
|
}
|
| 434 |
|
|
|
| 435 |
|
|
func (p *pp) fmtFloat32(v float32, verb rune) {
|
| 436 |
|
|
switch verb {
|
| 437 |
|
|
case 'b':
|
| 438 |
|
|
p.fmt.fmt_fb32(v)
|
| 439 |
|
|
case 'e':
|
| 440 |
|
|
p.fmt.fmt_e32(v)
|
| 441 |
|
|
case 'E':
|
| 442 |
|
|
p.fmt.fmt_E32(v)
|
| 443 |
|
|
case 'f':
|
| 444 |
|
|
p.fmt.fmt_f32(v)
|
| 445 |
|
|
case 'g', 'v':
|
| 446 |
|
|
p.fmt.fmt_g32(v)
|
| 447 |
|
|
case 'G':
|
| 448 |
|
|
p.fmt.fmt_G32(v)
|
| 449 |
|
|
default:
|
| 450 |
|
|
p.badVerb(verb)
|
| 451 |
|
|
}
|
| 452 |
|
|
}
|
| 453 |
|
|
|
| 454 |
|
|
func (p *pp) fmtFloat64(v float64, verb rune) {
|
| 455 |
|
|
switch verb {
|
| 456 |
|
|
case 'b':
|
| 457 |
|
|
p.fmt.fmt_fb64(v)
|
| 458 |
|
|
case 'e':
|
| 459 |
|
|
p.fmt.fmt_e64(v)
|
| 460 |
|
|
case 'E':
|
| 461 |
|
|
p.fmt.fmt_E64(v)
|
| 462 |
|
|
case 'f':
|
| 463 |
|
|
p.fmt.fmt_f64(v)
|
| 464 |
|
|
case 'g', 'v':
|
| 465 |
|
|
p.fmt.fmt_g64(v)
|
| 466 |
|
|
case 'G':
|
| 467 |
|
|
p.fmt.fmt_G64(v)
|
| 468 |
|
|
default:
|
| 469 |
|
|
p.badVerb(verb)
|
| 470 |
|
|
}
|
| 471 |
|
|
}
|
| 472 |
|
|
|
| 473 |
|
|
func (p *pp) fmtComplex64(v complex64, verb rune) {
|
| 474 |
|
|
switch verb {
|
| 475 |
|
|
case 'e', 'E', 'f', 'F', 'g', 'G':
|
| 476 |
|
|
p.fmt.fmt_c64(v, verb)
|
| 477 |
|
|
case 'v':
|
| 478 |
|
|
p.fmt.fmt_c64(v, 'g')
|
| 479 |
|
|
default:
|
| 480 |
|
|
p.badVerb(verb)
|
| 481 |
|
|
}
|
| 482 |
|
|
}
|
| 483 |
|
|
|
| 484 |
|
|
func (p *pp) fmtComplex128(v complex128, verb rune) {
|
| 485 |
|
|
switch verb {
|
| 486 |
|
|
case 'e', 'E', 'f', 'F', 'g', 'G':
|
| 487 |
|
|
p.fmt.fmt_c128(v, verb)
|
| 488 |
|
|
case 'v':
|
| 489 |
|
|
p.fmt.fmt_c128(v, 'g')
|
| 490 |
|
|
default:
|
| 491 |
|
|
p.badVerb(verb)
|
| 492 |
|
|
}
|
| 493 |
|
|
}
|
| 494 |
|
|
|
| 495 |
|
|
func (p *pp) fmtString(v string, verb rune, goSyntax bool) {
|
| 496 |
|
|
switch verb {
|
| 497 |
|
|
case 'v':
|
| 498 |
|
|
if goSyntax {
|
| 499 |
|
|
p.fmt.fmt_q(v)
|
| 500 |
|
|
} else {
|
| 501 |
|
|
p.fmt.fmt_s(v)
|
| 502 |
|
|
}
|
| 503 |
|
|
case 's':
|
| 504 |
|
|
p.fmt.fmt_s(v)
|
| 505 |
|
|
case 'x':
|
| 506 |
|
|
p.fmt.fmt_sx(v, ldigits)
|
| 507 |
|
|
case 'X':
|
| 508 |
|
|
p.fmt.fmt_sx(v, udigits)
|
| 509 |
|
|
case 'q':
|
| 510 |
|
|
p.fmt.fmt_q(v)
|
| 511 |
|
|
default:
|
| 512 |
|
|
p.badVerb(verb)
|
| 513 |
|
|
}
|
| 514 |
|
|
}
|
| 515 |
|
|
|
| 516 |
|
|
func (p *pp) fmtBytes(v []byte, verb rune, goSyntax bool, depth int) {
|
| 517 |
|
|
if verb == 'v' || verb == 'd' {
|
| 518 |
|
|
if goSyntax {
|
| 519 |
|
|
p.buf.Write(bytesBytes)
|
| 520 |
|
|
} else {
|
| 521 |
|
|
p.buf.WriteByte('[')
|
| 522 |
|
|
}
|
| 523 |
|
|
for i, c := range v {
|
| 524 |
|
|
if i > 0 {
|
| 525 |
|
|
if goSyntax {
|
| 526 |
|
|
p.buf.Write(commaSpaceBytes)
|
| 527 |
|
|
} else {
|
| 528 |
|
|
p.buf.WriteByte(' ')
|
| 529 |
|
|
}
|
| 530 |
|
|
}
|
| 531 |
|
|
p.printField(c, 'v', p.fmt.plus, goSyntax, depth+1)
|
| 532 |
|
|
}
|
| 533 |
|
|
if goSyntax {
|
| 534 |
|
|
p.buf.WriteByte('}')
|
| 535 |
|
|
} else {
|
| 536 |
|
|
p.buf.WriteByte(']')
|
| 537 |
|
|
}
|
| 538 |
|
|
return
|
| 539 |
|
|
}
|
| 540 |
|
|
s := string(v)
|
| 541 |
|
|
switch verb {
|
| 542 |
|
|
case 's':
|
| 543 |
|
|
p.fmt.fmt_s(s)
|
| 544 |
|
|
case 'x':
|
| 545 |
|
|
p.fmt.fmt_sx(s, ldigits)
|
| 546 |
|
|
case 'X':
|
| 547 |
|
|
p.fmt.fmt_sx(s, udigits)
|
| 548 |
|
|
case 'q':
|
| 549 |
|
|
p.fmt.fmt_q(s)
|
| 550 |
|
|
default:
|
| 551 |
|
|
p.badVerb(verb)
|
| 552 |
|
|
}
|
| 553 |
|
|
}
|
| 554 |
|
|
|
| 555 |
|
|
func (p *pp) fmtPointer(value reflect.Value, verb rune, goSyntax bool) {
|
| 556 |
|
|
var u uintptr
|
| 557 |
|
|
switch value.Kind() {
|
| 558 |
|
|
case reflect.Chan, reflect.Func, reflect.Map, reflect.Ptr, reflect.Slice, reflect.UnsafePointer:
|
| 559 |
|
|
u = value.Pointer()
|
| 560 |
|
|
default:
|
| 561 |
|
|
p.badVerb(verb)
|
| 562 |
|
|
return
|
| 563 |
|
|
}
|
| 564 |
|
|
if goSyntax {
|
| 565 |
|
|
p.add('(')
|
| 566 |
|
|
p.buf.WriteString(value.Type().String())
|
| 567 |
|
|
p.add(')')
|
| 568 |
|
|
p.add('(')
|
| 569 |
|
|
if u == 0 {
|
| 570 |
|
|
p.buf.Write(nilBytes)
|
| 571 |
|
|
} else {
|
| 572 |
|
|
p.fmt0x64(uint64(u), true)
|
| 573 |
|
|
}
|
| 574 |
|
|
p.add(')')
|
| 575 |
|
|
} else {
|
| 576 |
|
|
p.fmt0x64(uint64(u), !p.fmt.sharp)
|
| 577 |
|
|
}
|
| 578 |
|
|
}
|
| 579 |
|
|
|
| 580 |
|
|
var (
|
| 581 |
|
|
intBits = reflect.TypeOf(0).Bits()
|
| 582 |
|
|
floatBits = reflect.TypeOf(0.0).Bits()
|
| 583 |
|
|
complexBits = reflect.TypeOf(1i).Bits()
|
| 584 |
|
|
uintptrBits = reflect.TypeOf(uintptr(0)).Bits()
|
| 585 |
|
|
)
|
| 586 |
|
|
|
| 587 |
|
|
func (p *pp) catchPanic(field interface{}, verb rune) {
|
| 588 |
|
|
if err := recover(); err != nil {
|
| 589 |
|
|
// If it's a nil pointer, just say "". The likeliest causes are a
|
| 590 |
|
|
// Stringer that fails to guard against nil or a nil pointer for a
|
| 591 |
|
|
// value receiver, and in either case, "" is a nice result.
|
| 592 |
|
|
if v := reflect.ValueOf(field); v.Kind() == reflect.Ptr && v.IsNil() {
|
| 593 |
|
|
p.buf.Write(nilAngleBytes)
|
| 594 |
|
|
return
|
| 595 |
|
|
}
|
| 596 |
|
|
// Otherwise print a concise panic message. Most of the time the panic
|
| 597 |
|
|
// value will print itself nicely.
|
| 598 |
|
|
if p.panicking {
|
| 599 |
|
|
// Nested panics; the recursion in printField cannot succeed.
|
| 600 |
|
|
panic(err)
|
| 601 |
|
|
}
|
| 602 |
|
|
p.buf.WriteByte('%')
|
| 603 |
|
|
p.add(verb)
|
| 604 |
|
|
p.buf.Write(panicBytes)
|
| 605 |
|
|
p.panicking = true
|
| 606 |
|
|
p.printField(err, 'v', false, false, 0)
|
| 607 |
|
|
p.panicking = false
|
| 608 |
|
|
p.buf.WriteByte(')')
|
| 609 |
|
|
}
|
| 610 |
|
|
}
|
| 611 |
|
|
|
| 612 |
|
|
func (p *pp) handleMethods(verb rune, plus, goSyntax bool, depth int) (wasString, handled bool) {
|
| 613 |
|
|
if p.erroring {
|
| 614 |
|
|
return
|
| 615 |
|
|
}
|
| 616 |
|
|
// Is it a Formatter?
|
| 617 |
|
|
if formatter, ok := p.field.(Formatter); ok {
|
| 618 |
|
|
handled = true
|
| 619 |
|
|
wasString = false
|
| 620 |
|
|
defer p.catchPanic(p.field, verb)
|
| 621 |
|
|
formatter.Format(p, verb)
|
| 622 |
|
|
return
|
| 623 |
|
|
}
|
| 624 |
|
|
// Must not touch flags before Formatter looks at them.
|
| 625 |
|
|
if plus {
|
| 626 |
|
|
p.fmt.plus = false
|
| 627 |
|
|
}
|
| 628 |
|
|
|
| 629 |
|
|
// If we're doing Go syntax and the field knows how to supply it, take care of it now.
|
| 630 |
|
|
if goSyntax {
|
| 631 |
|
|
p.fmt.sharp = false
|
| 632 |
|
|
if stringer, ok := p.field.(GoStringer); ok {
|
| 633 |
|
|
wasString = false
|
| 634 |
|
|
handled = true
|
| 635 |
|
|
defer p.catchPanic(p.field, verb)
|
| 636 |
|
|
// Print the result of GoString unadorned.
|
| 637 |
|
|
p.fmtString(stringer.GoString(), 's', false)
|
| 638 |
|
|
return
|
| 639 |
|
|
}
|
| 640 |
|
|
} else {
|
| 641 |
|
|
// If a string is acceptable according to the format, see if
|
| 642 |
|
|
// the value satisfies one of the string-valued interfaces.
|
| 643 |
|
|
// Println etc. set verb to %v, which is "stringable".
|
| 644 |
|
|
switch verb {
|
| 645 |
|
|
case 'v', 's', 'x', 'X', 'q':
|
| 646 |
|
|
// Is it an error or Stringer?
|
| 647 |
|
|
// The duplication in the bodies is necessary:
|
| 648 |
|
|
// setting wasString and handled, and deferring catchPanic,
|
| 649 |
|
|
// must happen before calling the method.
|
| 650 |
|
|
switch v := p.field.(type) {
|
| 651 |
|
|
case error:
|
| 652 |
|
|
wasString = false
|
| 653 |
|
|
handled = true
|
| 654 |
|
|
defer p.catchPanic(p.field, verb)
|
| 655 |
|
|
p.printField(v.Error(), verb, plus, false, depth)
|
| 656 |
|
|
return
|
| 657 |
|
|
|
| 658 |
|
|
case Stringer:
|
| 659 |
|
|
wasString = false
|
| 660 |
|
|
handled = true
|
| 661 |
|
|
defer p.catchPanic(p.field, verb)
|
| 662 |
|
|
p.printField(v.String(), verb, plus, false, depth)
|
| 663 |
|
|
return
|
| 664 |
|
|
}
|
| 665 |
|
|
}
|
| 666 |
|
|
}
|
| 667 |
|
|
handled = false
|
| 668 |
|
|
return
|
| 669 |
|
|
}
|
| 670 |
|
|
|
| 671 |
|
|
func (p *pp) printField(field interface{}, verb rune, plus, goSyntax bool, depth int) (wasString bool) {
|
| 672 |
|
|
if field == nil {
|
| 673 |
|
|
if verb == 'T' || verb == 'v' {
|
| 674 |
|
|
p.buf.Write(nilAngleBytes)
|
| 675 |
|
|
} else {
|
| 676 |
|
|
p.badVerb(verb)
|
| 677 |
|
|
}
|
| 678 |
|
|
return false
|
| 679 |
|
|
}
|
| 680 |
|
|
|
| 681 |
|
|
p.field = field
|
| 682 |
|
|
p.value = reflect.Value{}
|
| 683 |
|
|
// Special processing considerations.
|
| 684 |
|
|
// %T (the value's type) and %p (its address) are special; we always do them first.
|
| 685 |
|
|
switch verb {
|
| 686 |
|
|
case 'T':
|
| 687 |
|
|
p.printField(reflect.TypeOf(field).String(), 's', false, false, 0)
|
| 688 |
|
|
return false
|
| 689 |
|
|
case 'p':
|
| 690 |
|
|
p.fmtPointer(reflect.ValueOf(field), verb, goSyntax)
|
| 691 |
|
|
return false
|
| 692 |
|
|
}
|
| 693 |
|
|
|
| 694 |
|
|
if wasString, handled := p.handleMethods(verb, plus, goSyntax, depth); handled {
|
| 695 |
|
|
return wasString
|
| 696 |
|
|
}
|
| 697 |
|
|
|
| 698 |
|
|
// Some types can be done without reflection.
|
| 699 |
|
|
switch f := field.(type) {
|
| 700 |
|
|
case bool:
|
| 701 |
|
|
p.fmtBool(f, verb)
|
| 702 |
|
|
case float32:
|
| 703 |
|
|
p.fmtFloat32(f, verb)
|
| 704 |
|
|
case float64:
|
| 705 |
|
|
p.fmtFloat64(f, verb)
|
| 706 |
|
|
case complex64:
|
| 707 |
|
|
p.fmtComplex64(complex64(f), verb)
|
| 708 |
|
|
case complex128:
|
| 709 |
|
|
p.fmtComplex128(f, verb)
|
| 710 |
|
|
case int:
|
| 711 |
|
|
p.fmtInt64(int64(f), verb)
|
| 712 |
|
|
case int8:
|
| 713 |
|
|
p.fmtInt64(int64(f), verb)
|
| 714 |
|
|
case int16:
|
| 715 |
|
|
p.fmtInt64(int64(f), verb)
|
| 716 |
|
|
case int32:
|
| 717 |
|
|
p.fmtInt64(int64(f), verb)
|
| 718 |
|
|
case int64:
|
| 719 |
|
|
p.fmtInt64(f, verb)
|
| 720 |
|
|
case uint:
|
| 721 |
|
|
p.fmtUint64(uint64(f), verb, goSyntax)
|
| 722 |
|
|
case uint8:
|
| 723 |
|
|
p.fmtUint64(uint64(f), verb, goSyntax)
|
| 724 |
|
|
case uint16:
|
| 725 |
|
|
p.fmtUint64(uint64(f), verb, goSyntax)
|
| 726 |
|
|
case uint32:
|
| 727 |
|
|
p.fmtUint64(uint64(f), verb, goSyntax)
|
| 728 |
|
|
case uint64:
|
| 729 |
|
|
p.fmtUint64(f, verb, goSyntax)
|
| 730 |
|
|
case uintptr:
|
| 731 |
|
|
p.fmtUint64(uint64(f), verb, goSyntax)
|
| 732 |
|
|
case string:
|
| 733 |
|
|
p.fmtString(f, verb, goSyntax)
|
| 734 |
|
|
wasString = verb == 's' || verb == 'v'
|
| 735 |
|
|
case []byte:
|
| 736 |
|
|
p.fmtBytes(f, verb, goSyntax, depth)
|
| 737 |
|
|
wasString = verb == 's'
|
| 738 |
|
|
default:
|
| 739 |
|
|
// Need to use reflection
|
| 740 |
|
|
return p.printReflectValue(reflect.ValueOf(field), verb, plus, goSyntax, depth)
|
| 741 |
|
|
}
|
| 742 |
|
|
p.field = nil
|
| 743 |
|
|
return
|
| 744 |
|
|
}
|
| 745 |
|
|
|
| 746 |
|
|
// printValue is like printField but starts with a reflect value, not an interface{} value.
|
| 747 |
|
|
func (p *pp) printValue(value reflect.Value, verb rune, plus, goSyntax bool, depth int) (wasString bool) {
|
| 748 |
|
|
if !value.IsValid() {
|
| 749 |
|
|
if verb == 'T' || verb == 'v' {
|
| 750 |
|
|
p.buf.Write(nilAngleBytes)
|
| 751 |
|
|
} else {
|
| 752 |
|
|
p.badVerb(verb)
|
| 753 |
|
|
}
|
| 754 |
|
|
return false
|
| 755 |
|
|
}
|
| 756 |
|
|
|
| 757 |
|
|
// Special processing considerations.
|
| 758 |
|
|
// %T (the value's type) and %p (its address) are special; we always do them first.
|
| 759 |
|
|
switch verb {
|
| 760 |
|
|
case 'T':
|
| 761 |
|
|
p.printField(value.Type().String(), 's', false, false, 0)
|
| 762 |
|
|
return false
|
| 763 |
|
|
case 'p':
|
| 764 |
|
|
p.fmtPointer(value, verb, goSyntax)
|
| 765 |
|
|
return false
|
| 766 |
|
|
}
|
| 767 |
|
|
|
| 768 |
|
|
// Handle values with special methods.
|
| 769 |
|
|
// Call always, even when field == nil, because handleMethods clears p.fmt.plus for us.
|
| 770 |
|
|
p.field = nil // Make sure it's cleared, for safety.
|
| 771 |
|
|
if value.CanInterface() {
|
| 772 |
|
|
p.field = value.Interface()
|
| 773 |
|
|
}
|
| 774 |
|
|
if wasString, handled := p.handleMethods(verb, plus, goSyntax, depth); handled {
|
| 775 |
|
|
return wasString
|
| 776 |
|
|
}
|
| 777 |
|
|
|
| 778 |
|
|
return p.printReflectValue(value, verb, plus, goSyntax, depth)
|
| 779 |
|
|
}
|
| 780 |
|
|
|
| 781 |
|
|
// printReflectValue is the fallback for both printField and printValue.
|
| 782 |
|
|
// It uses reflect to print the value.
|
| 783 |
|
|
func (p *pp) printReflectValue(value reflect.Value, verb rune, plus, goSyntax bool, depth int) (wasString bool) {
|
| 784 |
|
|
oldValue := p.value
|
| 785 |
|
|
p.value = value
|
| 786 |
|
|
BigSwitch:
|
| 787 |
|
|
switch f := value; f.Kind() {
|
| 788 |
|
|
case reflect.Bool:
|
| 789 |
|
|
p.fmtBool(f.Bool(), verb)
|
| 790 |
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
| 791 |
|
|
p.fmtInt64(f.Int(), verb)
|
| 792 |
|
|
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
|
| 793 |
|
|
p.fmtUint64(uint64(f.Uint()), verb, goSyntax)
|
| 794 |
|
|
case reflect.Float32, reflect.Float64:
|
| 795 |
|
|
if f.Type().Size() == 4 {
|
| 796 |
|
|
p.fmtFloat32(float32(f.Float()), verb)
|
| 797 |
|
|
} else {
|
| 798 |
|
|
p.fmtFloat64(float64(f.Float()), verb)
|
| 799 |
|
|
}
|
| 800 |
|
|
case reflect.Complex64, reflect.Complex128:
|
| 801 |
|
|
if f.Type().Size() == 8 {
|
| 802 |
|
|
p.fmtComplex64(complex64(f.Complex()), verb)
|
| 803 |
|
|
} else {
|
| 804 |
|
|
p.fmtComplex128(complex128(f.Complex()), verb)
|
| 805 |
|
|
}
|
| 806 |
|
|
case reflect.String:
|
| 807 |
|
|
p.fmtString(f.String(), verb, goSyntax)
|
| 808 |
|
|
case reflect.Map:
|
| 809 |
|
|
if goSyntax {
|
| 810 |
|
|
p.buf.WriteString(f.Type().String())
|
| 811 |
|
|
if f.IsNil() {
|
| 812 |
|
|
p.buf.WriteString("(nil)")
|
| 813 |
|
|
break
|
| 814 |
|
|
}
|
| 815 |
|
|
p.buf.WriteByte('{')
|
| 816 |
|
|
} else {
|
| 817 |
|
|
p.buf.Write(mapBytes)
|
| 818 |
|
|
}
|
| 819 |
|
|
keys := f.MapKeys()
|
| 820 |
|
|
for i, key := range keys {
|
| 821 |
|
|
if i > 0 {
|
| 822 |
|
|
if goSyntax {
|
| 823 |
|
|
p.buf.Write(commaSpaceBytes)
|
| 824 |
|
|
} else {
|
| 825 |
|
|
p.buf.WriteByte(' ')
|
| 826 |
|
|
}
|
| 827 |
|
|
}
|
| 828 |
|
|
p.printValue(key, verb, plus, goSyntax, depth+1)
|
| 829 |
|
|
p.buf.WriteByte(':')
|
| 830 |
|
|
p.printValue(f.MapIndex(key), verb, plus, goSyntax, depth+1)
|
| 831 |
|
|
}
|
| 832 |
|
|
if goSyntax {
|
| 833 |
|
|
p.buf.WriteByte('}')
|
| 834 |
|
|
} else {
|
| 835 |
|
|
p.buf.WriteByte(']')
|
| 836 |
|
|
}
|
| 837 |
|
|
case reflect.Struct:
|
| 838 |
|
|
if goSyntax {
|
| 839 |
|
|
p.buf.WriteString(value.Type().String())
|
| 840 |
|
|
}
|
| 841 |
|
|
p.add('{')
|
| 842 |
|
|
v := f
|
| 843 |
|
|
t := v.Type()
|
| 844 |
|
|
for i := 0; i < v.NumField(); i++ {
|
| 845 |
|
|
if i > 0 {
|
| 846 |
|
|
if goSyntax {
|
| 847 |
|
|
p.buf.Write(commaSpaceBytes)
|
| 848 |
|
|
} else {
|
| 849 |
|
|
p.buf.WriteByte(' ')
|
| 850 |
|
|
}
|
| 851 |
|
|
}
|
| 852 |
|
|
if plus || goSyntax {
|
| 853 |
|
|
if f := t.Field(i); f.Name != "" {
|
| 854 |
|
|
p.buf.WriteString(f.Name)
|
| 855 |
|
|
p.buf.WriteByte(':')
|
| 856 |
|
|
}
|
| 857 |
|
|
}
|
| 858 |
|
|
p.printValue(getField(v, i), verb, plus, goSyntax, depth+1)
|
| 859 |
|
|
}
|
| 860 |
|
|
p.buf.WriteByte('}')
|
| 861 |
|
|
case reflect.Interface:
|
| 862 |
|
|
value := f.Elem()
|
| 863 |
|
|
if !value.IsValid() {
|
| 864 |
|
|
if goSyntax {
|
| 865 |
|
|
p.buf.WriteString(f.Type().String())
|
| 866 |
|
|
p.buf.Write(nilParenBytes)
|
| 867 |
|
|
} else {
|
| 868 |
|
|
p.buf.Write(nilAngleBytes)
|
| 869 |
|
|
}
|
| 870 |
|
|
} else {
|
| 871 |
|
|
wasString = p.printValue(value, verb, plus, goSyntax, depth+1)
|
| 872 |
|
|
}
|
| 873 |
|
|
case reflect.Array, reflect.Slice:
|
| 874 |
|
|
// Byte slices are special.
|
| 875 |
|
|
if f.Type().Elem().Kind() == reflect.Uint8 {
|
| 876 |
|
|
// We know it's a slice of bytes, but we also know it does not have static type
|
| 877 |
|
|
// []byte, or it would have been caught above. Therefore we cannot convert
|
| 878 |
|
|
// it directly in the (slightly) obvious way: f.Interface().([]byte); it doesn't have
|
| 879 |
|
|
// that type, and we can't write an expression of the right type and do a
|
| 880 |
|
|
// conversion because we don't have a static way to write the right type.
|
| 881 |
|
|
// So we build a slice by hand. This is a rare case but it would be nice
|
| 882 |
|
|
// if reflection could help a little more.
|
| 883 |
|
|
bytes := make([]byte, f.Len())
|
| 884 |
|
|
for i := range bytes {
|
| 885 |
|
|
bytes[i] = byte(f.Index(i).Uint())
|
| 886 |
|
|
}
|
| 887 |
|
|
p.fmtBytes(bytes, verb, goSyntax, depth)
|
| 888 |
|
|
wasString = verb == 's'
|
| 889 |
|
|
break
|
| 890 |
|
|
}
|
| 891 |
|
|
if goSyntax {
|
| 892 |
|
|
p.buf.WriteString(value.Type().String())
|
| 893 |
|
|
if f.Kind() == reflect.Slice && f.IsNil() {
|
| 894 |
|
|
p.buf.WriteString("(nil)")
|
| 895 |
|
|
break
|
| 896 |
|
|
}
|
| 897 |
|
|
p.buf.WriteByte('{')
|
| 898 |
|
|
} else {
|
| 899 |
|
|
p.buf.WriteByte('[')
|
| 900 |
|
|
}
|
| 901 |
|
|
for i := 0; i < f.Len(); i++ {
|
| 902 |
|
|
if i > 0 {
|
| 903 |
|
|
if goSyntax {
|
| 904 |
|
|
p.buf.Write(commaSpaceBytes)
|
| 905 |
|
|
} else {
|
| 906 |
|
|
p.buf.WriteByte(' ')
|
| 907 |
|
|
}
|
| 908 |
|
|
}
|
| 909 |
|
|
p.printValue(f.Index(i), verb, plus, goSyntax, depth+1)
|
| 910 |
|
|
}
|
| 911 |
|
|
if goSyntax {
|
| 912 |
|
|
p.buf.WriteByte('}')
|
| 913 |
|
|
} else {
|
| 914 |
|
|
p.buf.WriteByte(']')
|
| 915 |
|
|
}
|
| 916 |
|
|
case reflect.Ptr:
|
| 917 |
|
|
v := f.Pointer()
|
| 918 |
|
|
// pointer to array or slice or struct? ok at top level
|
| 919 |
|
|
// but not embedded (avoid loops)
|
| 920 |
|
|
if v != 0 && depth == 0 {
|
| 921 |
|
|
switch a := f.Elem(); a.Kind() {
|
| 922 |
|
|
case reflect.Array, reflect.Slice:
|
| 923 |
|
|
p.buf.WriteByte('&')
|
| 924 |
|
|
p.printValue(a, verb, plus, goSyntax, depth+1)
|
| 925 |
|
|
break BigSwitch
|
| 926 |
|
|
case reflect.Struct:
|
| 927 |
|
|
p.buf.WriteByte('&')
|
| 928 |
|
|
p.printValue(a, verb, plus, goSyntax, depth+1)
|
| 929 |
|
|
break BigSwitch
|
| 930 |
|
|
}
|
| 931 |
|
|
}
|
| 932 |
|
|
if goSyntax {
|
| 933 |
|
|
p.buf.WriteByte('(')
|
| 934 |
|
|
p.buf.WriteString(value.Type().String())
|
| 935 |
|
|
p.buf.WriteByte(')')
|
| 936 |
|
|
p.buf.WriteByte('(')
|
| 937 |
|
|
if v == 0 {
|
| 938 |
|
|
p.buf.Write(nilBytes)
|
| 939 |
|
|
} else {
|
| 940 |
|
|
p.fmt0x64(uint64(v), true)
|
| 941 |
|
|
}
|
| 942 |
|
|
p.buf.WriteByte(')')
|
| 943 |
|
|
break
|
| 944 |
|
|
}
|
| 945 |
|
|
if v == 0 {
|
| 946 |
|
|
p.buf.Write(nilAngleBytes)
|
| 947 |
|
|
break
|
| 948 |
|
|
}
|
| 949 |
|
|
p.fmt0x64(uint64(v), true)
|
| 950 |
|
|
case reflect.Chan, reflect.Func, reflect.UnsafePointer:
|
| 951 |
|
|
p.fmtPointer(value, verb, goSyntax)
|
| 952 |
|
|
default:
|
| 953 |
|
|
p.unknownType(f)
|
| 954 |
|
|
}
|
| 955 |
|
|
p.value = oldValue
|
| 956 |
|
|
return wasString
|
| 957 |
|
|
}
|
| 958 |
|
|
|
| 959 |
|
|
// intFromArg gets the fieldnumth element of a. On return, isInt reports whether the argument has type int.
|
| 960 |
|
|
func intFromArg(a []interface{}, end, i, fieldnum int) (num int, isInt bool, newi, newfieldnum int) {
|
| 961 |
|
|
newi, newfieldnum = end, fieldnum
|
| 962 |
|
|
if i < end && fieldnum < len(a) {
|
| 963 |
|
|
num, isInt = a[fieldnum].(int)
|
| 964 |
|
|
newi, newfieldnum = i+1, fieldnum+1
|
| 965 |
|
|
}
|
| 966 |
|
|
return
|
| 967 |
|
|
}
|
| 968 |
|
|
|
| 969 |
|
|
func (p *pp) doPrintf(format string, a []interface{}) {
|
| 970 |
|
|
end := len(format)
|
| 971 |
|
|
fieldnum := 0 // we process one field per non-trivial format
|
| 972 |
|
|
for i := 0; i < end; {
|
| 973 |
|
|
lasti := i
|
| 974 |
|
|
for i < end && format[i] != '%' {
|
| 975 |
|
|
i++
|
| 976 |
|
|
}
|
| 977 |
|
|
if i > lasti {
|
| 978 |
|
|
p.buf.WriteString(format[lasti:i])
|
| 979 |
|
|
}
|
| 980 |
|
|
if i >= end {
|
| 981 |
|
|
// done processing format string
|
| 982 |
|
|
break
|
| 983 |
|
|
}
|
| 984 |
|
|
|
| 985 |
|
|
// Process one verb
|
| 986 |
|
|
i++
|
| 987 |
|
|
// flags and widths
|
| 988 |
|
|
p.fmt.clearflags()
|
| 989 |
|
|
F:
|
| 990 |
|
|
for ; i < end; i++ {
|
| 991 |
|
|
switch format[i] {
|
| 992 |
|
|
case '#':
|
| 993 |
|
|
p.fmt.sharp = true
|
| 994 |
|
|
case '0':
|
| 995 |
|
|
p.fmt.zero = true
|
| 996 |
|
|
case '+':
|
| 997 |
|
|
p.fmt.plus = true
|
| 998 |
|
|
case '-':
|
| 999 |
|
|
p.fmt.minus = true
|
| 1000 |
|
|
case ' ':
|
| 1001 |
|
|
p.fmt.space = true
|
| 1002 |
|
|
default:
|
| 1003 |
|
|
break F
|
| 1004 |
|
|
}
|
| 1005 |
|
|
}
|
| 1006 |
|
|
// do we have width?
|
| 1007 |
|
|
if i < end && format[i] == '*' {
|
| 1008 |
|
|
p.fmt.wid, p.fmt.widPresent, i, fieldnum = intFromArg(a, end, i, fieldnum)
|
| 1009 |
|
|
if !p.fmt.widPresent {
|
| 1010 |
|
|
p.buf.Write(widthBytes)
|
| 1011 |
|
|
}
|
| 1012 |
|
|
} else {
|
| 1013 |
|
|
p.fmt.wid, p.fmt.widPresent, i = parsenum(format, i, end)
|
| 1014 |
|
|
}
|
| 1015 |
|
|
// do we have precision?
|
| 1016 |
|
|
if i < end && format[i] == '.' {
|
| 1017 |
|
|
if format[i+1] == '*' {
|
| 1018 |
|
|
p.fmt.prec, p.fmt.precPresent, i, fieldnum = intFromArg(a, end, i+1, fieldnum)
|
| 1019 |
|
|
if !p.fmt.precPresent {
|
| 1020 |
|
|
p.buf.Write(precBytes)
|
| 1021 |
|
|
}
|
| 1022 |
|
|
} else {
|
| 1023 |
|
|
p.fmt.prec, p.fmt.precPresent, i = parsenum(format, i+1, end)
|
| 1024 |
|
|
if !p.fmt.precPresent {
|
| 1025 |
|
|
p.fmt.prec = 0
|
| 1026 |
|
|
p.fmt.precPresent = true
|
| 1027 |
|
|
}
|
| 1028 |
|
|
}
|
| 1029 |
|
|
}
|
| 1030 |
|
|
if i >= end {
|
| 1031 |
|
|
p.buf.Write(noVerbBytes)
|
| 1032 |
|
|
continue
|
| 1033 |
|
|
}
|
| 1034 |
|
|
c, w := utf8.DecodeRuneInString(format[i:])
|
| 1035 |
|
|
i += w
|
| 1036 |
|
|
// percent is special - absorbs no operand
|
| 1037 |
|
|
if c == '%' {
|
| 1038 |
|
|
p.buf.WriteByte('%') // We ignore width and prec.
|
| 1039 |
|
|
continue
|
| 1040 |
|
|
}
|
| 1041 |
|
|
if fieldnum >= len(a) { // out of operands
|
| 1042 |
|
|
p.buf.WriteByte('%')
|
| 1043 |
|
|
p.add(c)
|
| 1044 |
|
|
p.buf.Write(missingBytes)
|
| 1045 |
|
|
continue
|
| 1046 |
|
|
}
|
| 1047 |
|
|
field := a[fieldnum]
|
| 1048 |
|
|
fieldnum++
|
| 1049 |
|
|
|
| 1050 |
|
|
goSyntax := c == 'v' && p.fmt.sharp
|
| 1051 |
|
|
plus := c == 'v' && p.fmt.plus
|
| 1052 |
|
|
p.printField(field, c, plus, goSyntax, 0)
|
| 1053 |
|
|
}
|
| 1054 |
|
|
|
| 1055 |
|
|
if fieldnum < len(a) {
|
| 1056 |
|
|
p.buf.Write(extraBytes)
|
| 1057 |
|
|
for ; fieldnum < len(a); fieldnum++ {
|
| 1058 |
|
|
field := a[fieldnum]
|
| 1059 |
|
|
if field != nil {
|
| 1060 |
|
|
p.buf.WriteString(reflect.TypeOf(field).String())
|
| 1061 |
|
|
p.buf.WriteByte('=')
|
| 1062 |
|
|
}
|
| 1063 |
|
|
p.printField(field, 'v', false, false, 0)
|
| 1064 |
|
|
if fieldnum+1 < len(a) {
|
| 1065 |
|
|
p.buf.Write(commaSpaceBytes)
|
| 1066 |
|
|
}
|
| 1067 |
|
|
}
|
| 1068 |
|
|
p.buf.WriteByte(')')
|
| 1069 |
|
|
}
|
| 1070 |
|
|
}
|
| 1071 |
|
|
|
| 1072 |
|
|
func (p *pp) doPrint(a []interface{}, addspace, addnewline bool) {
|
| 1073 |
|
|
prevString := false
|
| 1074 |
|
|
for fieldnum := 0; fieldnum < len(a); fieldnum++ {
|
| 1075 |
|
|
p.fmt.clearflags()
|
| 1076 |
|
|
// always add spaces if we're doing println
|
| 1077 |
|
|
field := a[fieldnum]
|
| 1078 |
|
|
if fieldnum > 0 {
|
| 1079 |
|
|
isString := field != nil && reflect.TypeOf(field).Kind() == reflect.String
|
| 1080 |
|
|
if addspace || !isString && !prevString {
|
| 1081 |
|
|
p.buf.WriteByte(' ')
|
| 1082 |
|
|
}
|
| 1083 |
|
|
}
|
| 1084 |
|
|
prevString = p.printField(field, 'v', false, false, 0)
|
| 1085 |
|
|
}
|
| 1086 |
|
|
if addnewline {
|
| 1087 |
|
|
p.buf.WriteByte('\n')
|
| 1088 |
|
|
}
|
| 1089 |
|
|
}
|
