// for init (and main, but we're not in package main) we should only get one error
func init[P /* ERROR "func init must have no type parameters" */ any /* ERROR "predeclared any requires go1.18 or later" */]() {
}
func main[P /* ERROR "type parameter requires go1.18 or later" */ any /* ERROR "predeclared any requires go1.18 or later" */]() {
}

// Copyright 2020 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.

// The predeclared type comparable is not visible before Go 1.18.

package p

// Note that using what looks like a predeclared identifier, say int,
// as type parameter in this situation is deceptive and considered bad
// style. In m3 below, int is the name of the local receiver type parameter
// and it shadows the predeclared identifier int which then cannot be used
// anymore as expected.
// This is no different from locally re-declaring a predeclared identifier

func (r *reader) cleanupTypes() {
	for _, t := range r.types {
		visible := r.isVisible(t.name)
		predeclared := predeclaredTypes[t.name]

		if t.decl == nil && (predeclared || visible && (t.isEmbedded || r.hasDotImp)) {
			// t.name is a predeclared type (and was not redeclared in this package),
			// or it was embedded somewhere but its declaration is missing (because

//         Implicit   bool
//         Constraint typeOff
//     }
//
// typeOff means a uvarint that either indicates a predeclared type,
// or an offset into the Data section. If the uvarint is less than
// predeclReserved, then it indicates the index into the predeclared
// types list (see predeclared in bexport.go for order). Otherwise,
// subtracting predeclReserved yields the offset of a type descriptor.
//

	// All Objects have a package, except predeclared ones.
	errorError := Universe.Lookup("error").Type().Underlying().(*Interface).ExplicitMethod(0) // (error).Error
	for id, obj := range info.Uses {
		predeclared := obj == Universe.Lookup(obj.Name()) || obj == errorError
		if predeclared == (obj.Pkg() != nil) {
			posn := fset.Position(id.Pos())
			if predeclared {

	// All Objects have a package, except predeclared ones.
	errorError := Universe.Lookup("error").Type().Underlying().(*Interface).ExplicitMethod(0) // (error).Error
	for id, obj := range info.Uses {
		predeclared := obj == Universe.Lookup(obj.Name()) || obj == errorError
		if predeclared == (obj.Pkg() != nil) {
			posn := id.Pos()
			if predeclared {
				return nil, fmt.Errorf("%s: predeclared object with package: %s", posn, obj)

		return types.RecvOnly
	case 2 /* Csend */ :
		return types.SendOnly
	case 3 /* Cboth */ :
		return types.SendRecv
	default:
		errorf("unexpected channel dir %d", d)
		return 0
	}
}

var predeclared = []types.Type{
	// basic types
	types.Typ[types.Bool],
	types.Typ[types.Int],
	types.Typ[types.Int8],
	types.Typ[types.Int16],
	types.Typ[types.Int32],
	types.Typ[types.Int64],
	types.Typ[types.Uint],

//go:build unix
// +build unix

package main

// Test that we can collect a lot of colliding profiling signals from
// an external C thread. This used to fail when built with the race
// detector, because a call of the predeclared function copy was
// turned into a call to runtime.slicecopy, which is not marked nosplit.

/*
#include <signal.h>
#include <stdint.h>
#include <pthread.h>
#include <sched.h>

struct cgoTracebackArg {

func (m *posMap) pos(p poser) src.XPos { return m.makeXPos(p.Pos()) }
func (m *posMap) end(p ender) src.XPos { return m.makeXPos(p.End()) }

func (m *posMap) makeXPos(pos syntax.Pos) src.XPos {
	// Predeclared objects (e.g., the result parameter for error.Error)
	// do not have a position.
	if !pos.IsKnown() {
		return src.NoXPos
	}

	posBase := m.makeSrcPosBase(pos.Base())