proto/pointer_reflect.go - platform/tools/external/go/src/github.com/golang/protobuf - Git at Google

 // Go support for Protocol Buffers - Google's data interchange format
 //
 // Copyright 2012 The Go Authors.  All rights reserved.
 // https://github.com/golang/protobuf
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 // +build appengine

 // This file contains an implementation of proto field accesses using package reflect.
 // It is slower than the code in pointer_unsafe.go but it avoids package unsafe and can
 // be used on App Engine.

 package proto

 import (
 	"math"
 	"reflect"
 )

 // A structPointer is a pointer to a struct.
 type structPointer struct {
 	v reflect.Value
 }

 // toStructPointer returns a structPointer equivalent to the given reflect value.
 // The reflect value must itself be a pointer to a struct.
 func toStructPointer(v reflect.Value) structPointer {
 	return structPointer{v}
 }

 // IsNil reports whether p is nil.
 func structPointer_IsNil(p structPointer) bool {
 	return p.v.IsNil()
 }

 // Interface returns the struct pointer as an interface value.
 func structPointer_Interface(p structPointer, _ reflect.Type) interface{} {
 	return p.v.Interface()
 }

 // A field identifies a field in a struct, accessible from a structPointer.
 // In this implementation, a field is identified by the sequence of field indices
 // passed to reflect's FieldByIndex.
 type field []int

 // toField returns a field equivalent to the given reflect field.
 func toField(f *reflect.StructField) field {
 	return f.Index
 }

 // invalidField is an invalid field identifier.
 var invalidField = field(nil)

 // IsValid reports whether the field identifier is valid.
 func (f field) IsValid() bool { return f != nil }

 // field returns the given field in the struct as a reflect value.
 func structPointer_field(p structPointer, f field) reflect.Value {
 	// Special case: an extension map entry with a value of type T
 	// passes a *T to the struct-handling code with a zero field,
 	// expecting that it will be treated as equivalent to *struct{ X T },
 	// which has the same memory layout. We have to handle that case
 	// specially, because reflect will panic if we call FieldByIndex on a
 	// non-struct.
 	if f == nil {
 		return p.v.Elem()
 	}

 	return p.v.Elem().FieldByIndex(f)
 }

 // ifield returns the given field in the struct as an interface value.
 func structPointer_ifield(p structPointer, f field) interface{} {
 	return structPointer_field(p, f).Addr().Interface()
 }

 // Bytes returns the address of a []byte field in the struct.
 func structPointer_Bytes(p structPointer, f field) *[]byte {
 	return structPointer_ifield(p, f).(*[]byte)
 }

 // BytesSlice returns the address of a [][]byte field in the struct.
 func structPointer_BytesSlice(p structPointer, f field) *[][]byte {
 	return structPointer_ifield(p, f).(*[][]byte)
 }

 // Bool returns the address of a *bool field in the struct.
 func structPointer_Bool(p structPointer, f field) **bool {
 	return structPointer_ifield(p, f).(**bool)
 }

 // BoolVal returns the address of a bool field in the struct.
 func structPointer_BoolVal(p structPointer, f field) *bool {
 	return structPointer_ifield(p, f).(*bool)
 }

 // BoolSlice returns the address of a []bool field in the struct.
 func structPointer_BoolSlice(p structPointer, f field) *[]bool {
 	return structPointer_ifield(p, f).(*[]bool)
 }

 // String returns the address of a *string field in the struct.
 func structPointer_String(p structPointer, f field) **string {
 	return structPointer_ifield(p, f).(**string)
 }

 // StringVal returns the address of a string field in the struct.
 func structPointer_StringVal(p structPointer, f field) *string {
 	return structPointer_ifield(p, f).(*string)
 }

 // StringSlice returns the address of a []string field in the struct.
 func structPointer_StringSlice(p structPointer, f field) *[]string {
 	return structPointer_ifield(p, f).(*[]string)
 }

 // ExtMap returns the address of an extension map field in the struct.
 func structPointer_ExtMap(p structPointer, f field) *map[int32]Extension {
 	return structPointer_ifield(p, f).(*map[int32]Extension)
 }

 // Map returns the reflect.Value for the address of a map field in the struct.
 func structPointer_Map(p structPointer, f field, typ reflect.Type) reflect.Value {
 	return structPointer_field(p, f).Addr()
 }

 // SetStructPointer writes a *struct field in the struct.
 func structPointer_SetStructPointer(p structPointer, f field, q structPointer) {
 	structPointer_field(p, f).Set(q.v)
 }

 // GetStructPointer reads a *struct field in the struct.
 func structPointer_GetStructPointer(p structPointer, f field) structPointer {
 	return structPointer{structPointer_field(p, f)}
 }

 // StructPointerSlice the address of a []*struct field in the struct.
 func structPointer_StructPointerSlice(p structPointer, f field) structPointerSlice {
 	return structPointerSlice{structPointer_field(p, f)}
 }

 // A structPointerSlice represents the address of a slice of pointers to structs
 // (themselves messages or groups). That is, v.Type() is *[]*struct{...}.
 type structPointerSlice struct {
 	v reflect.Value
 }

 func (p structPointerSlice) Len() int                  { return p.v.Len() }
 func (p structPointerSlice) Index(i int) structPointer { return structPointer{p.v.Index(i)} }
 func (p structPointerSlice) Append(q structPointer) {
 	p.v.Set(reflect.Append(p.v, q.v))
 }

 var (
 	int32Type   = reflect.TypeOf(int32(0))
 	uint32Type  = reflect.TypeOf(uint32(0))
 	float32Type = reflect.TypeOf(float32(0))
 	int64Type   = reflect.TypeOf(int64(0))
 	uint64Type  = reflect.TypeOf(uint64(0))
 	float64Type = reflect.TypeOf(float64(0))
 )

 // A word32 represents a field of type *int32, *uint32, *float32, or *enum.
 // That is, v.Type() is *int32, *uint32, *float32, or *enum and v is assignable.
 type word32 struct {
 	v reflect.Value
 }

 // IsNil reports whether p is nil.
 func word32_IsNil(p word32) bool {
 	return p.v.IsNil()
 }

 // Set sets p to point at a newly allocated word with bits set to x.
 func word32_Set(p word32, o *Buffer, x uint32) {
 	t := p.v.Type().Elem()
 	switch t {
 	case int32Type:
 		if len(o.int32s) == 0 {
 			o.int32s = make([]int32, uint32PoolSize)
 		}
 		o.int32s[0] = int32(x)
 		p.v.Set(reflect.ValueOf(&o.int32s[0]))
 		o.int32s = o.int32s[1:]
 		return
 	case uint32Type:
 		if len(o.uint32s) == 0 {
 			o.uint32s = make([]uint32, uint32PoolSize)
 		}
 		o.uint32s[0] = x
 		p.v.Set(reflect.ValueOf(&o.uint32s[0]))
 		o.uint32s = o.uint32s[1:]
 		return
 	case float32Type:
 		if len(o.float32s) == 0 {
 			o.float32s = make([]float32, uint32PoolSize)
 		}
 		o.float32s[0] = math.Float32frombits(x)
 		p.v.Set(reflect.ValueOf(&o.float32s[0]))
 		o.float32s = o.float32s[1:]
 		return
 	}

 	// must be enum
 	p.v.Set(reflect.New(t))
 	p.v.Elem().SetInt(int64(int32(x)))
 }

 // Get gets the bits pointed at by p, as a uint32.
 func word32_Get(p word32) uint32 {
 	elem := p.v.Elem()
 	switch elem.Kind() {
 	case reflect.Int32:
 		return uint32(elem.Int())
 	case reflect.Uint32:
 		return uint32(elem.Uint())
 	case reflect.Float32:
 		return math.Float32bits(float32(elem.Float()))
 	}
 	panic("unreachable")
 }

 // Word32 returns a reference to a *int32, *uint32, *float32, or *enum field in the struct.
 func structPointer_Word32(p structPointer, f field) word32 {
 	return word32{structPointer_field(p, f)}
 }

 // A word32Val represents a field of type int32, uint32, float32, or enum.
 // That is, v.Type() is int32, uint32, float32, or enum and v is assignable.
 type word32Val struct {
 	v reflect.Value
 }

 // Set sets *p to x.
 func word32Val_Set(p word32Val, x uint32) {
 	switch p.v.Type() {
 	case int32Type:
 		p.v.SetInt(int64(x))
 		return
 	case uint32Type:
 		p.v.SetUint(uint64(x))
 		return
 	case float32Type:
 		p.v.SetFloat(float64(math.Float32frombits(x)))
 		return
 	}

 	// must be enum
 	p.v.SetInt(int64(int32(x)))
 }

 // Get gets the bits pointed at by p, as a uint32.
 func word32Val_Get(p word32Val) uint32 {
 	elem := p.v
 	switch elem.Kind() {
 	case reflect.Int32:
 		return uint32(elem.Int())
 	case reflect.Uint32:
 		return uint32(elem.Uint())
 	case reflect.Float32:
 		return math.Float32bits(float32(elem.Float()))
 	}
 	panic("unreachable")
 }

 // Word32Val returns a reference to a int32, uint32, float32, or enum field in the struct.
 func structPointer_Word32Val(p structPointer, f field) word32Val {
 	return word32Val{structPointer_field(p, f)}
 }

 // A word32Slice is a slice of 32-bit values.
 // That is, v.Type() is []int32, []uint32, []float32, or []enum.
 type word32Slice struct {
 	v reflect.Value
 }

 func (p word32Slice) Append(x uint32) {
 	n, m := p.v.Len(), p.v.Cap()
 	if n < m {
 		p.v.SetLen(n + 1)
 	} else {
 		t := p.v.Type().Elem()
 		p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
 	}
 	elem := p.v.Index(n)
 	switch elem.Kind() {
 	case reflect.Int32:
 		elem.SetInt(int64(int32(x)))
 	case reflect.Uint32:
 		elem.SetUint(uint64(x))
 	case reflect.Float32:
 		elem.SetFloat(float64(math.Float32frombits(x)))
 	}
 }

 func (p word32Slice) Len() int {
 	return p.v.Len()
 }

 func (p word32Slice) Index(i int) uint32 {
 	elem := p.v.Index(i)
 	switch elem.Kind() {
 	case reflect.Int32:
 		return uint32(elem.Int())
 	case reflect.Uint32:
 		return uint32(elem.Uint())
 	case reflect.Float32:
 		return math.Float32bits(float32(elem.Float()))
 	}
 	panic("unreachable")
 }

 // Word32Slice returns a reference to a []int32, []uint32, []float32, or []enum field in the struct.
 func structPointer_Word32Slice(p structPointer, f field) word32Slice {
 	return word32Slice{structPointer_field(p, f)}
 }

 // word64 is like word32 but for 64-bit values.
 type word64 struct {
 	v reflect.Value
 }

 func word64_Set(p word64, o *Buffer, x uint64) {
 	t := p.v.Type().Elem()
 	switch t {
 	case int64Type:
 		if len(o.int64s) == 0 {
 			o.int64s = make([]int64, uint64PoolSize)
 		}
 		o.int64s[0] = int64(x)
 		p.v.Set(reflect.ValueOf(&o.int64s[0]))
 		o.int64s = o.int64s[1:]
 		return
 	case uint64Type:
 		if len(o.uint64s) == 0 {
 			o.uint64s = make([]uint64, uint64PoolSize)
 		}
 		o.uint64s[0] = x
 		p.v.Set(reflect.ValueOf(&o.uint64s[0]))
 		o.uint64s = o.uint64s[1:]
 		return
 	case float64Type:
 		if len(o.float64s) == 0 {
 			o.float64s = make([]float64, uint64PoolSize)
 		}
 		o.float64s[0] = math.Float64frombits(x)
 		p.v.Set(reflect.ValueOf(&o.float64s[0]))
 		o.float64s = o.float64s[1:]
 		return
 	}
 	panic("unreachable")
 }

 func word64_IsNil(p word64) bool {
 	return p.v.IsNil()
 }

 func word64_Get(p word64) uint64 {
 	elem := p.v.Elem()
 	switch elem.Kind() {
 	case reflect.Int64:
 		return uint64(elem.Int())
 	case reflect.Uint64:
 		return elem.Uint()
 	case reflect.Float64:
 		return math.Float64bits(elem.Float())
 	}
 	panic("unreachable")
 }

 func structPointer_Word64(p structPointer, f field) word64 {
 	return word64{structPointer_field(p, f)}
 }

 // word64Val is like word32Val but for 64-bit values.
 type word64Val struct {
 	v reflect.Value
 }

 func word64Val_Set(p word64Val, o *Buffer, x uint64) {
 	switch p.v.Type() {
 	case int64Type:
 		p.v.SetInt(int64(x))
 		return
 	case uint64Type:
 		p.v.SetUint(x)
 		return
 	case float64Type:
 		p.v.SetFloat(math.Float64frombits(x))
 		return
 	}
 	panic("unreachable")
 }

 func word64Val_Get(p word64Val) uint64 {
 	elem := p.v
 	switch elem.Kind() {
 	case reflect.Int64:
 		return uint64(elem.Int())
 	case reflect.Uint64:
 		return elem.Uint()
 	case reflect.Float64:
 		return math.Float64bits(elem.Float())
 	}
 	panic("unreachable")
 }

 func structPointer_Word64Val(p structPointer, f field) word64Val {
 	return word64Val{structPointer_field(p, f)}
 }

 type word64Slice struct {
 	v reflect.Value
 }

 func (p word64Slice) Append(x uint64) {
 	n, m := p.v.Len(), p.v.Cap()
 	if n < m {
 		p.v.SetLen(n + 1)
 	} else {
 		t := p.v.Type().Elem()
 		p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
 	}
 	elem := p.v.Index(n)
 	switch elem.Kind() {
 	case reflect.Int64:
 		elem.SetInt(int64(int64(x)))
 	case reflect.Uint64:
 		elem.SetUint(uint64(x))
 	case reflect.Float64:
 		elem.SetFloat(float64(math.Float64frombits(x)))
 	}
 }

 func (p word64Slice) Len() int {
 	return p.v.Len()
 }

 func (p word64Slice) Index(i int) uint64 {
 	elem := p.v.Index(i)
 	switch elem.Kind() {
 	case reflect.Int64:
 		return uint64(elem.Int())
 	case reflect.Uint64:
 		return uint64(elem.Uint())
 	case reflect.Float64:
 		return math.Float64bits(float64(elem.Float()))
 	}
 	panic("unreachable")
 }

 func structPointer_Word64Slice(p structPointer, f field) word64Slice {
 	return word64Slice{structPointer_field(p, f)}
 }
	// Go support for Protocol Buffers - Google's data interchange format
	//
	// Copyright 2012 The Go Authors. All rights reserved.
	// https://github.com/golang/protobuf
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are
	// met:
	//
	// * Redistributions of source code must retain the above copyright
	// notice, this list of conditions and the following disclaimer.
	// * Redistributions in binary form must reproduce the above
	// copyright notice, this list of conditions and the following disclaimer
	// in the documentation and/or other materials provided with the
	// distribution.
	// * Neither the name of Google Inc. nor the names of its
	// contributors may be used to endorse or promote products derived from
	// this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	// +build appengine

	// This file contains an implementation of proto field accesses using package reflect.
	// It is slower than the code in pointer_unsafe.go but it avoids package unsafe and can
	// be used on App Engine.

	package proto

	import (
	"math"
	"reflect"
	)

	// A structPointer is a pointer to a struct.
	type structPointer struct {
	v reflect.Value
	}

	// toStructPointer returns a structPointer equivalent to the given reflect value.
	// The reflect value must itself be a pointer to a struct.
	func toStructPointer(v reflect.Value) structPointer {
	return structPointer{v}
	}

	// IsNil reports whether p is nil.
	func structPointer_IsNil(p structPointer) bool {
	return p.v.IsNil()
	}

	// Interface returns the struct pointer as an interface value.
	func structPointer_Interface(p structPointer, _ reflect.Type) interface{} {
	return p.v.Interface()
	}

	// A field identifies a field in a struct, accessible from a structPointer.
	// In this implementation, a field is identified by the sequence of field indices
	// passed to reflect's FieldByIndex.
	type field []int

	// toField returns a field equivalent to the given reflect field.
	func toField(f *reflect.StructField) field {
	return f.Index
	}

	// invalidField is an invalid field identifier.
	var invalidField = field(nil)

	// IsValid reports whether the field identifier is valid.
	func (f field) IsValid() bool { return f != nil }

	// field returns the given field in the struct as a reflect value.
	func structPointer_field(p structPointer, f field) reflect.Value {
	// Special case: an extension map entry with a value of type T
	// passes a *T to the struct-handling code with a zero field,
	// expecting that it will be treated as equivalent to *struct{ X T },
	// which has the same memory layout. We have to handle that case
	// specially, because reflect will panic if we call FieldByIndex on a
	// non-struct.
	if f == nil {
	return p.v.Elem()
	}

	return p.v.Elem().FieldByIndex(f)
	}

	// ifield returns the given field in the struct as an interface value.
	func structPointer_ifield(p structPointer, f field) interface{} {
	return structPointer_field(p, f).Addr().Interface()
	}

	// Bytes returns the address of a []byte field in the struct.
	func structPointer_Bytes(p structPointer, f field) *[]byte {
	return structPointer_ifield(p, f).(*[]byte)
	}

	// BytesSlice returns the address of a [][]byte field in the struct.
	func structPointer_BytesSlice(p structPointer, f field) *[][]byte {
	return structPointer_ifield(p, f).(*[][]byte)
	}

	// Bool returns the address of a *bool field in the struct.
	func structPointer_Bool(p structPointer, f field) **bool {
	return structPointer_ifield(p, f).(**bool)
	}

	// BoolVal returns the address of a bool field in the struct.
	func structPointer_BoolVal(p structPointer, f field) *bool {
	return structPointer_ifield(p, f).(*bool)
	}

	// BoolSlice returns the address of a []bool field in the struct.
	func structPointer_BoolSlice(p structPointer, f field) *[]bool {
	return structPointer_ifield(p, f).(*[]bool)
	}

	// String returns the address of a *string field in the struct.
	func structPointer_String(p structPointer, f field) **string {
	return structPointer_ifield(p, f).(**string)
	}

	// StringVal returns the address of a string field in the struct.
	func structPointer_StringVal(p structPointer, f field) *string {
	return structPointer_ifield(p, f).(*string)
	}

	// StringSlice returns the address of a []string field in the struct.
	func structPointer_StringSlice(p structPointer, f field) *[]string {
	return structPointer_ifield(p, f).(*[]string)
	}

	// ExtMap returns the address of an extension map field in the struct.
	func structPointer_ExtMap(p structPointer, f field) *map[int32]Extension {
	return structPointer_ifield(p, f).(*map[int32]Extension)
	}

	// Map returns the reflect.Value for the address of a map field in the struct.
	func structPointer_Map(p structPointer, f field, typ reflect.Type) reflect.Value {
	return structPointer_field(p, f).Addr()
	}

	// SetStructPointer writes a *struct field in the struct.
	func structPointer_SetStructPointer(p structPointer, f field, q structPointer) {
	structPointer_field(p, f).Set(q.v)
	}

	// GetStructPointer reads a *struct field in the struct.
	func structPointer_GetStructPointer(p structPointer, f field) structPointer {
	return structPointer{structPointer_field(p, f)}
	}

	// StructPointerSlice the address of a []*struct field in the struct.
	func structPointer_StructPointerSlice(p structPointer, f field) structPointerSlice {
	return structPointerSlice{structPointer_field(p, f)}
	}

	// A structPointerSlice represents the address of a slice of pointers to structs
	// (themselves messages or groups). That is, v.Type() is []struct{...}.
	type structPointerSlice struct {
	v reflect.Value
	}

	func (p structPointerSlice) Len() int { return p.v.Len() }
	func (p structPointerSlice) Index(i int) structPointer { return structPointer{p.v.Index(i)} }
	func (p structPointerSlice) Append(q structPointer) {
	p.v.Set(reflect.Append(p.v, q.v))
	}

	var (
	int32Type = reflect.TypeOf(int32(0))
	uint32Type = reflect.TypeOf(uint32(0))
	float32Type = reflect.TypeOf(float32(0))
	int64Type = reflect.TypeOf(int64(0))
	uint64Type = reflect.TypeOf(uint64(0))
	float64Type = reflect.TypeOf(float64(0))
	)

	// A word32 represents a field of type int32, uint32, float32, or enum.
	// That is, v.Type() is int32, uint32, float32, or enum and v is assignable.
	type word32 struct {
	v reflect.Value
	}

	// IsNil reports whether p is nil.
	func word32_IsNil(p word32) bool {
	return p.v.IsNil()
	}

	// Set sets p to point at a newly allocated word with bits set to x.
	func word32_Set(p word32, o *Buffer, x uint32) {
	t := p.v.Type().Elem()
	switch t {
	case int32Type:
	if len(o.int32s) == 0 {
	o.int32s = make([]int32, uint32PoolSize)
	}
	o.int32s[0] = int32(x)
	p.v.Set(reflect.ValueOf(&o.int32s[0]))
	o.int32s = o.int32s[1:]
	return
	case uint32Type:
	if len(o.uint32s) == 0 {
	o.uint32s = make([]uint32, uint32PoolSize)
	}
	o.uint32s[0] = x
	p.v.Set(reflect.ValueOf(&o.uint32s[0]))
	o.uint32s = o.uint32s[1:]
	return
	case float32Type:
	if len(o.float32s) == 0 {
	o.float32s = make([]float32, uint32PoolSize)
	}
	o.float32s[0] = math.Float32frombits(x)
	p.v.Set(reflect.ValueOf(&o.float32s[0]))
	o.float32s = o.float32s[1:]
	return
	}

	// must be enum
	p.v.Set(reflect.New(t))
	p.v.Elem().SetInt(int64(int32(x)))
	}

	// Get gets the bits pointed at by p, as a uint32.
	func word32_Get(p word32) uint32 {
	elem := p.v.Elem()
	switch elem.Kind() {
	case reflect.Int32:
	return uint32(elem.Int())
	case reflect.Uint32:
	return uint32(elem.Uint())
	case reflect.Float32:
	return math.Float32bits(float32(elem.Float()))
	}
	panic("unreachable")
	}

	// Word32 returns a reference to a int32, uint32, float32, or enum field in the struct.
	func structPointer_Word32(p structPointer, f field) word32 {
	return word32{structPointer_field(p, f)}
	}

	// A word32Val represents a field of type int32, uint32, float32, or enum.
	// That is, v.Type() is int32, uint32, float32, or enum and v is assignable.
	type word32Val struct {
	v reflect.Value
	}

	// Set sets *p to x.
	func word32Val_Set(p word32Val, x uint32) {
	switch p.v.Type() {
	case int32Type:
	p.v.SetInt(int64(x))
	return
	case uint32Type:
	p.v.SetUint(uint64(x))
	return
	case float32Type:
	p.v.SetFloat(float64(math.Float32frombits(x)))
	return
	}

	// must be enum
	p.v.SetInt(int64(int32(x)))
	}

	// Get gets the bits pointed at by p, as a uint32.
	func word32Val_Get(p word32Val) uint32 {
	elem := p.v
	switch elem.Kind() {
	case reflect.Int32:
	return uint32(elem.Int())
	case reflect.Uint32:
	return uint32(elem.Uint())
	case reflect.Float32:
	return math.Float32bits(float32(elem.Float()))
	}
	panic("unreachable")
	}

	// Word32Val returns a reference to a int32, uint32, float32, or enum field in the struct.
	func structPointer_Word32Val(p structPointer, f field) word32Val {
	return word32Val{structPointer_field(p, f)}
	}

	// A word32Slice is a slice of 32-bit values.
	// That is, v.Type() is []int32, []uint32, []float32, or []enum.
	type word32Slice struct {
	v reflect.Value
	}

	func (p word32Slice) Append(x uint32) {
	n, m := p.v.Len(), p.v.Cap()
	if n < m {
	p.v.SetLen(n + 1)
	} else {
	t := p.v.Type().Elem()
	p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
	}
	elem := p.v.Index(n)
	switch elem.Kind() {
	case reflect.Int32:
	elem.SetInt(int64(int32(x)))
	case reflect.Uint32:
	elem.SetUint(uint64(x))
	case reflect.Float32:
	elem.SetFloat(float64(math.Float32frombits(x)))
	}
	}

	func (p word32Slice) Len() int {
	return p.v.Len()
	}

	func (p word32Slice) Index(i int) uint32 {
	elem := p.v.Index(i)
	switch elem.Kind() {
	case reflect.Int32:
	return uint32(elem.Int())
	case reflect.Uint32:
	return uint32(elem.Uint())
	case reflect.Float32:
	return math.Float32bits(float32(elem.Float()))
	}
	panic("unreachable")
	}

	// Word32Slice returns a reference to a []int32, []uint32, []float32, or []enum field in the struct.
	func structPointer_Word32Slice(p structPointer, f field) word32Slice {
	return word32Slice{structPointer_field(p, f)}
	}

	// word64 is like word32 but for 64-bit values.
	type word64 struct {
	v reflect.Value
	}

	func word64_Set(p word64, o *Buffer, x uint64) {
	t := p.v.Type().Elem()
	switch t {
	case int64Type:
	if len(o.int64s) == 0 {
	o.int64s = make([]int64, uint64PoolSize)
	}
	o.int64s[0] = int64(x)
	p.v.Set(reflect.ValueOf(&o.int64s[0]))
	o.int64s = o.int64s[1:]
	return
	case uint64Type:
	if len(o.uint64s) == 0 {
	o.uint64s = make([]uint64, uint64PoolSize)
	}
	o.uint64s[0] = x
	p.v.Set(reflect.ValueOf(&o.uint64s[0]))
	o.uint64s = o.uint64s[1:]
	return
	case float64Type:
	if len(o.float64s) == 0 {
	o.float64s = make([]float64, uint64PoolSize)
	}
	o.float64s[0] = math.Float64frombits(x)
	p.v.Set(reflect.ValueOf(&o.float64s[0]))
	o.float64s = o.float64s[1:]
	return
	}
	panic("unreachable")
	}

	func word64_IsNil(p word64) bool {
	return p.v.IsNil()
	}

	func word64_Get(p word64) uint64 {
	elem := p.v.Elem()
	switch elem.Kind() {
	case reflect.Int64:
	return uint64(elem.Int())
	case reflect.Uint64:
	return elem.Uint()
	case reflect.Float64:
	return math.Float64bits(elem.Float())
	}
	panic("unreachable")
	}

	func structPointer_Word64(p structPointer, f field) word64 {
	return word64{structPointer_field(p, f)}
	}

	// word64Val is like word32Val but for 64-bit values.
	type word64Val struct {
	v reflect.Value
	}

	func word64Val_Set(p word64Val, o *Buffer, x uint64) {
	switch p.v.Type() {
	case int64Type:
	p.v.SetInt(int64(x))
	return
	case uint64Type:
	p.v.SetUint(x)
	return
	case float64Type:
	p.v.SetFloat(math.Float64frombits(x))
	return
	}
	panic("unreachable")
	}

	func word64Val_Get(p word64Val) uint64 {
	elem := p.v
	switch elem.Kind() {
	case reflect.Int64:
	return uint64(elem.Int())
	case reflect.Uint64:
	return elem.Uint()
	case reflect.Float64:
	return math.Float64bits(elem.Float())
	}
	panic("unreachable")
	}

	func structPointer_Word64Val(p structPointer, f field) word64Val {
	return word64Val{structPointer_field(p, f)}
	}

	type word64Slice struct {
	v reflect.Value
	}

	func (p word64Slice) Append(x uint64) {
	n, m := p.v.Len(), p.v.Cap()
	if n < m {
	p.v.SetLen(n + 1)
	} else {
	t := p.v.Type().Elem()
	p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
	}
	elem := p.v.Index(n)
	switch elem.Kind() {
	case reflect.Int64:
	elem.SetInt(int64(int64(x)))
	case reflect.Uint64:
	elem.SetUint(uint64(x))
	case reflect.Float64:
	elem.SetFloat(float64(math.Float64frombits(x)))
	}
	}

	func (p word64Slice) Len() int {
	return p.v.Len()
	}

	func (p word64Slice) Index(i int) uint64 {
	elem := p.v.Index(i)
	switch elem.Kind() {
	case reflect.Int64:
	return uint64(elem.Int())
	case reflect.Uint64:
	return uint64(elem.Uint())
	case reflect.Float64:
	return math.Float64bits(float64(elem.Float()))
	}
	panic("unreachable")
	}

	func structPointer_Word64Slice(p structPointer, f field) word64Slice {
	return word64Slice{structPointer_field(p, f)}
	}