// run

// 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.

// Test the cap predeclared function applied to channels.

package main

import (
	"strings"
	"unsafe"
)

type T chan int

const ptrSize = unsafe.Sizeof((*byte)(nil))

func main() {
	c := make(T, 10)
	if len(c) != 0 || cap(c) != 10 {

// Constraint is a constraint interface with two type parameters.
type Constraint[P, Q interface{ string | ~int | Type[int] }] interface {
	~int | ~byte | Type[string]
	M() P
}

// int16 shadows the predeclared type int16.
type int16 int

// NewEmbeddings demonstrates how we filter the new embedded elements.
type NewEmbeddings interface {
	string // should not be filtered
	int16
	struct{ f int }
	~struct{ f int }

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

package types2

// BasicKind describes the kind of basic type.
type BasicKind int

const (
	Invalid BasicKind = iota // type is invalid

	// predeclared types
	Bool
	Int
	Int8
	Int16
	Int32
	Int64
	Uint
	Uint8
	Uint16
	Uint32
	Uint64
	Uintptr
	Float32
	Float64
	Complex64
	Complex128
	String
	UnsafePointer

	// MethodB has a blank receiver type parameter. 
	func (t Type[_]) MethodB()

	// MethodC has a lower-case receiver type parameter. 
	func (t Type[c]) MethodC()

	// int16 shadows the predeclared type int16. 

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

package types

// BasicKind describes the kind of basic type.
type BasicKind int

const (
	Invalid BasicKind = iota // type is invalid

	// predeclared types
	Bool
	Int
	Int8
	Int16
	Int32
	Int64
	Uint
	Uint8
	Uint16
	Uint32
	Uint64
	Uintptr
	Float32
	Float64
	Complex64
	Complex128
	String
	UnsafePointer

	}
}

// Make sure a parenthesized nil is ok.

func _(x interface{}) {
	switch x.(type) {
	case ((nil)), int:
	}
}

// Make sure we look for the predeclared nil.

func _(x interface{}) {
	type nil int
	switch x.(type) {
	case nil: // ok - this is the type nil
	}
}

func _(x interface{}) {
	var nil int
	switch x.(type) {

	if len(s) == 0 {
		var zero Elem
		return zero
	}
	return _Reduce(s[1:], s[0], _Min[Elem])
}

// _Append adds values to the end of a slice, returning a new slice.
// This is like the predeclared append function; it's an example
// of how to write it using generics. We used to write code like
// this before append was added to the language, but we had to write
// a separate copy for each type.

		*syntax.AssignStmt, *syntax.CallStmt:
		// no chance

	case *syntax.LabeledStmt:
		return check.isTerminating(s.Stmt, s.Label.Value)

	case *syntax.ExprStmt:
		// calling the predeclared (possibly parenthesized) panic() function is terminating
		if call, ok := syntax.Unparen(s.X).(*syntax.CallExpr); ok && check.isPanic[call] {
			return true
		}

	case *syntax.ReturnStmt:
		return true

	type T2 struct {
		unsafe /* ERROR "cannot be unsafe.Pointer" */ .Pointer
		*/* ERROR "cannot be unsafe.Pointer" */ unsafe.Pointer /* ERROR "Pointer redeclared" */
		UP /* ERROR "cannot be unsafe.Pointer" */
		* /* ERROR "cannot be unsafe.Pointer" */ UP /* ERROR "UP redeclared" */
	}
}

// Named types that are pointers.

type S struct{ x int }
func (*S) m() {}
type P *S

func _() {
	var s *S

		*ast.RangeStmt:
		// no chance

	case *ast.LabeledStmt:
		return check.isTerminating(s.Stmt, s.Label.Name)

	case *ast.ExprStmt:
		// calling the predeclared (possibly parenthesized) panic() function is terminating
		if call, ok := ast.Unparen(s.X).(*ast.CallExpr); ok && check.isPanic[call] {
			return true
		}

	case *ast.ReturnStmt:
		return true