case reflect.Float64:
		v.SetFloat(math.Float64frombits(d.uint64()))

	case reflect.Complex64:
		v.SetComplex(complex(
			float64(math.Float32frombits(d.uint32())),
			float64(math.Float32frombits(d.uint32())),
		))
	case reflect.Complex128:
		v.SetComplex(complex(
			math.Float64frombits(d.uint64()),
			math.Float64frombits(d.uint64()),
		))
	}
}

	//  func f() {
	//  	var x []int
	//  	y := []int64{1,2,3}
	//  	copy(x, y)
	//  }
	InvalidCopy

	// InvalidComplex occurs when the complex built-in function is called with
	// arguments with incompatible types.
	//
	// Example:
	//  var _ = complex(float32(1), float64(2))
	InvalidComplex

	// InvalidDelete occurs when the delete built-in function is called with a
	// first argument that is not a map.

		val = constant.MakeString(r.string())

	case types.IsInteger:
		var x big.Int
		r.mpint(&x, b)
		val = constant.Make(&x)

	case types.IsFloat:
		val = r.mpfloat(b)

	case types.IsComplex:
		re := r.mpfloat(b)
		im := r.mpfloat(b)
		val = constant.BinaryOp(re, token.ADD, constant.MakeImag(im))

	default:
		errorf("unexpected type %v", typ) // panics
		panic("unreachable")
	}

	case reflect.Float32:
		p.fmtFloat(f.Float(), 32, verb)
	case reflect.Float64:
		p.fmtFloat(f.Float(), 64, verb)
	case reflect.Complex64:
		p.fmtComplex(f.Complex(), 64, verb)
	case reflect.Complex128:
		p.fmtComplex(f.Complex(), 128, verb)
	case reflect.String:
		p.fmtString(f.String(), verb)
	case reflect.Map:
		if p.fmt.sharpV {
			p.buf.writeString(f.Type().String())
			if f.IsNil() {

			return false
		}
	}
	return true
}

var errComplex = errors.New("expression too complex for // +build lines")

// PlusBuildLines returns a sequence of “// +build” lines that evaluate to the build expression x.
// If the expression is too complex to convert directly to “// +build” lines, PlusBuildLines returns an error.
func PlusBuildLines(x Expr) ([]string, error) {

func truncate(c ir.Node, t *types.Type) (ir.Node, bool) {
	ct := c.Type()
	cv := c.Val()
	if ct.Kind() != t.Kind() {
		switch {
		default:
			// Note: float -> float/integer and complex -> complex are valid but subtle.
			// For example a float32(float64 1e300) evaluates to +Inf at runtime
			// and the compiler doesn't have any concept of +Inf, so that would
			// have to be left for runtime code evaluation.

		return x
	case complexVal:
		if Sign(x.im) == 0 {
			return ToFloat(x.re)
		}
	}
	return unknownVal{}
}

// ToComplex converts x to a [Complex] value if x is representable as a [Complex].
// Otherwise it returns an [Unknown].
func ToComplex(x Value) Value {
	switch x := x.(type) {
	case int64Val, intVal, ratVal, floatVal:
		return vtoc(x)
	case complexVal:
		return x
	}

do exactly this.
</p>

<p>
A read of an array, struct, or complex number
may by implemented as a read of each individual sub-value
(array element, struct field, or real/imaginary component),
in any order.
Similarly, a write of an array, struct, or complex number
may be implemented as a write of each individual sub-value,
in any order.
</p>

<p>

But before that, handling asynchronous code was quite more complex and difficult.

In previous versions of Python, you could have used threads or <a href="https://www.gevent.org/" class="external-link" target="_blank">Gevent</a>. But the code is way more complex to understand, debug, and think about.

The most common is the implicit flow.

The most secure is the code flow, but is more complex to implement as it requires more steps. As it is more complex, many providers end up suggesting the implicit flow.

!!! note
    It's common that each authentication provider names their flows in a different way, to make it part of their brand.