)

// ----------------------------------------------------------------------------
// API

// A Struct represents a struct type.
type Struct struct {
	fields []*Var   // fields != nil indicates the struct is set up (possibly with len(fields) == 0)
	tags   []string // field tags; nil if there are no tags
}

// NewStruct returns a new struct with the given fields and corresponding field tags.

// license that can be found in the LICENSE file.

package main

import (
	"fmt"
)

type E[T any] struct {
	v T
}

type S1 struct {
	E[int]
	v string
}

type Eint = E[int]
type Ebool = E[bool]
type Eint2 = Eint

type S2 struct {
	Eint
	Ebool
	v string
}

type S3 struct {
	*E[int]
}

func main() {
	s1 := S1{Eint{2}, "foo"}
	if got, want := s1.E.v, 2; got != want {

)

// ----------------------------------------------------------------------------
// API

// A Struct represents a struct type.
type Struct struct {
	fields []*Var   // fields != nil indicates the struct is set up (possibly with len(fields) == 0)
	tags   []string // field tags; nil if there are no tags
}

// NewStruct returns a new struct with the given fields and corresponding field tags.

// See the License for the specific language governing permissions and
// limitations under the License.

/*
struct.go contains functions for traversing and modifying trees of Go structs.
*/
package tpath

import (
	"fmt"
	"reflect"
	"strconv"

	"google.golang.org/protobuf/types/known/structpb"

	"istio.io/istio/operator/pkg/util"
)

package codegen

// This file contains code generation tests related to the handling of
// struct types.

// ------------- //
//    Zeroing    //
// ------------- //

type Z1 struct {
	a, b, c int
}

func Zero1(t *Z1) { // Issue #18370
	// amd64:`MOVUPS\tX[0-9]+, \(.*\)`,`MOVQ\t\$0, 16\(.*\)`
	*t = Z1{}
}

type Z2 struct {
	a, b, c *int
}

func Zero2(t *Z2) {

### New structs package

The new [structs] package provides
types for struct fields that modify properties of
the containing struct type such as memory layout.

In this release, the only such type is
[`HostLayout`](/pkg/structs#HostLayout)
which indicates that a structure with a field of that
type has a layout that conforms to host platform

	var u struct {
		x struct {
			x int "bar"
		} "bar"
	}
	s = s
	s = t // ERRORx `cannot use .* in assignment`
	s = u // ERRORx `cannot use .* in assignment`
	s = S(s)
	s = S(t)
	s = S(u)
	t = u // ERRORx `cannot use .* in assignment`
	t = T(u)
}

func _() {
	type E1 struct {
		x int "foo"
	}
	type E2 struct {
		x int "bar"
	}
	type S struct{ x E1 }
	type T struct {
		x E2 "foo"

package structs

// HostLayout marks a struct as using host memory layout. A struct with a
// field of type HostLayout will be laid out in memory according to host
// expectations, generally following the host's C ABI.
//
// HostLayout does not affect layout within any other struct-typed fields
// of the containing struct, nor does it affect layout of structs
// containing the struct marked as host layout.
//

	t = u    // ERROR "cannot use .* in assignment|incompatible type"
	t = T(u)
}

func _() {
	type E struct{ x int }
	type S struct {
		f func(struct {
			x int "foo"
		})
	}
	type T struct {
		f func(struct {
			x int "bar"
		})
	}
	var s S
	var t T
	var u struct{ f func(E) }
	s = s
	s = t // ERROR "cannot use .* in assignment|incompatible type"

	A5 [10]A6
	A6 *A5

	// slices
	L0 []L0

	// structs
	S0 /* ERROR "invalid recursive type: S0 refers to itself" */ struct{ _ S0 }
	S1 /* ERROR "invalid recursive type: S1 refers to itself" */ struct{ S1 }
	S2 struct{ _ *S2 }
	S3 struct{ *S3 }

	S4 /* ERROR "invalid recursive type" */ struct{ S5 }
	S5 struct{ S6 }
	S6 S4

	// pointers
	P0 *P0
	PP *struct{ PP.f /* ERROR "PP.f is not a type" */ }

	// functions