// untyped constants
	const _ int = complex(1, 0)
	const _ float32 = complex(1, 0)
	const _ complex64 = complex(1, 0)
	const _ complex128 = complex(1, 0)
	const _ = complex(0i, 0i)
	const _ = complex(0i, 0)
	const _ int = 1.0 + complex(1, 0i)

	const _ int = complex /* ERROR "int" */ (1.1, 0)
	const _ float32 = complex /* ERROR "float32" */ (1, 2)

	// untyped values
	var s uint

func inf2one(f float64) float64 {
	g := 0.0
	if isInf(f) {
		g = 1.0
	}
	return copysign(g, f)
}

func complex128div(n complex128, m complex128) complex128 {
	var e, f float64 // complex(e, f) = n/m

	// Algorithm for robust complex division as described in
	// Robert L. Smith: Algorithm 116: Complex division. Commun. ACM 5(8): 435 (1962).
	if abs(real(m)) >= abs(imag(m)) {
		ratio := imag(m) / real(m)

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

package p

var _ = int8(4) * 300         // ERROR "overflows int8"
var _ = complex64(1) * 1e200  // ERROR "complex real part overflow|overflows complex64"

type orderedNumeric interface {
	~int | ~int8 | ~int16 | ~int32 | ~int64 |
		~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr |
		~float32 | ~float64
}

// Complex matches the two complex types, which do not have a < operator.
type Complex interface {
	~complex64 | ~complex128
}

// orderedAbs is a helper type that defines an Abs method for
// a struct containing an ordered numeric type.
type orderedAbs[T orderedNumeric] struct {

type orderedNumeric interface {
	~int | ~int8 | ~int16 | ~int32 | ~int64 |
		~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr |
		~float32 | ~float64
}

// Complex matches the two complex types, which do not have a < operator.
type Complex interface {
	~complex64 | ~complex128
}

// For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
// // orderedAbs is a helper type that defines an Abs method for

Christian Wansart <******@****.***> 1573139799 +0100

// Test that predeclared names can be redeclared by the user.

package main

import (
	"fmt"
	"runtime"
)

func main() {
	n :=
		append +
			bool +
			byte +
			complex +
			complex64 +
			complex128 +
			cap +
			close +
			delete +
			error +
			false +
			float32 +
			float64 +
			imag +
			int +
			int8 +
			int16 +
			int32 +
			int64 +
			len +
			make +

	// All complex divide by zero should not error.
	ErrorTest{"complex 0/0", func() { use(c / d) }, ""},
	ErrorTest{"complex64 0/0", func() { use(c64 / d64) }, ""},
	ErrorTest{"complex128 0/0", func() { use(c128 / d128) }, ""},

	ErrorTest{"complex 1/0", func() { use(e / d) }, ""},
	ErrorTest{"complex64 1/0", func() { use(e64 / d64) }, ""},
	ErrorTest{"complex128 1/0", func() { use(e128 / d128) }, ""},
}

func cx128diff_ssa(a, b complex128) complex128 {
	return a - b
}

//go:noinline
func cx128prod_ssa(a, b complex128) complex128 {
	return a * b
}

//go:noinline
func cx128quot_ssa(a, b complex128) complex128 {
	return a / b
}

//go:noinline
func cx128neg_ssa(a complex128) complex128 {
	return -a
}

//go:noinline
func cx128real_ssa(a complex128) float64 {

		}
	}

	{
		var (
			pz   = complex64(0)
			nz   = complex(0, math.Float32frombits(1<<31))
			nana = complex(5, float32(math.NaN()))
			nanb = complex(5, math.Float32frombits(math.Float32bits(float32(math.NaN()))^2))
		)

		m := map[complex64]string{
			pz:   "+0",
			nana: "NaN",
			nanb: "NaN",
		}
		if m[nz] != "+0" {
			panic(fmt.Sprintln("complex64 map does not treat -0 and +0 as equal for read"))