package a

import (
	"math"
)

type Numeric interface {
	~int | ~int8 | ~int16 | ~int32 | ~int64 |
		~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr |
		~float32 | ~float64 |
		~complex64 | ~complex128
}

// numericAbs matches a struct containing a numeric type that has an Abs method.
type numericAbs[T Numeric] interface {
	~struct{ Value_ T }
	Abs() T
	Value() T
}

package cmplx

import "math"

// IsInf reports whether either real(x) or imag(x) is an infinity.
func IsInf(x complex128) bool {
	if math.IsInf(real(x), 0) || math.IsInf(imag(x), 0) {
		return true
	}
	return false
}

// Inf returns a complex infinity, complex(+Inf, +Inf).
func Inf() complex128 {
	inf := math.Inf(1)
	return complex(inf, inf)

// and neither is an infinity.
func IsNaN(x complex128) bool {
	switch {
	case math.IsInf(real(x), 0) || math.IsInf(imag(x), 0):
		return false
	case math.IsNaN(real(x)) || math.IsNaN(imag(x)):
		return true
	}
	return false
}

// NaN returns a complex “not-a-number” value.
func NaN() complex128 {
	nan := math.NaN()
	return complex(nan, nan)

	var z complex128
	z = (1 << s) << (1 << s)     // ERROR "non-integer|type complex128"
	z = (1 << s) << (1. << s)    // ERROR "non-integer|type complex128"
	z = (1 << s) << (1.1 << s)   // ERROR "invalid|truncated|complex128"
	z = (1. << s) << (1 << s)    // ERROR "non-integer|type complex128|must be integer"
	z = (1. << s) << (1. << s)   // ERROR "non-integer|type complex128|must be integer"

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

package p

type I struct {
	x int64
}

type F struct {
	x float64
}

type C struct {
	x *complex128
}

type D struct {
	x complex64
}

type A [1]*complex128

//go:noinline
func (i I) X() C {
	cx := complex(0, float64(i.x))
	return C{&cx}
}

//go:noinline
func (f F) X() C {
	cx := complex(f.x, 0)
	return C{&cx}

import "testing"

var global any

var allocsPerRunTests = []struct {
	name   string
	fn     func()
	allocs float64
}{
	{"alloc *byte", func() { global = new(*byte) }, 1},
	{"alloc complex128", func() { global = new(complex128) }, 1},
	{"alloc float64", func() { global = new(float64) }, 1},
	{"alloc int32", func() { global = new(int32) }, 1},
	{"alloc byte", func() { global = new(byte) }, 1},
}

	// structs
	dup("struct{}"),
	dup("struct{x int}"),
	{`struct {
		x, y int
		z float32 "foo"
	}`, `struct{x int; y int; z float32 "foo"}`},
	{`struct {
		string
		elems []complex128
	}`, `struct{string; elems []complex128}`},

	// pointers
	dup("*int"),
	dup("***struct{}"),
	dup("*struct{a int; b float32}"),

	// functions
	dup("func()"),
	dup("func(x int)"),

			}
		},
	},
	modifier{
		name: "complex128",
		t: func() {
			c := complex128(complex(float64(1.01), float64(1.01)))
			for i := 0; i < mods; i++ {
				c = complex(real(c)*1.01, imag(c)*1.01)
				runtime.Gosched()
			}
		},
		pointerT: func() {
			a := func() *complex128 { return new(complex128) }()
			*a = complex128(complex(float64(1.01), float64(1.01)))
			for i := 0; i < mods; i++ {

//    IEEE      -10,+10     30000       7.2e-16     1.2e-16
// Also tested by ctan * ccot = 1 and catan(ctan(z))  =  z.

// Tan returns the tangent of x.
func Tan(x complex128) complex128 {
	switch re, im := real(x), imag(x); {
	case math.IsInf(im, 0):
		switch {
		case math.IsInf(re, 0) || math.IsNaN(re):
			return complex(math.Copysign(0, re), math.Copysign(1, im))
		}

	var _ complex128 = complex /* ERRORx `cannot use .* in variable declaration` */ (f32, f32)
	var _ complex128 = complex(f64, f64)

	// 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)