//	newLen = new length (= oldLen + num)
//	oldCap = original slice's capacity.
//	   num = number of elements being added
//	    et = element type
//
// return values:
//
//	newPtr = pointer to the new backing store
//	newLen = same value as the argument
//	newCap = capacity of the new backing store
//
// Requires that uint(newLen) > uint(oldCap).
// Assumes the original slice length is newLen - num
//

	// but we don't care about it)
	req.Header = nil
	back.Header = nil
	if !reflect.DeepEqual(req, back) {
		t.Errorf("Original request doesn't match Request read back.")
		t.Logf("Original: %#v", req)
		t.Logf("Original.URL: %#v", req.URL)
		t.Logf("Wrote: %s", out.String())
		t.Logf("Read back (doesn't match Original): %#v", back)
	}
}

type responseWriterJustWriter struct {
	io.Writer
}

//
// [underlying type]: https://go.dev/ref/spec#Underlying_types.
func (a *Alias) Underlying() Type { return unalias(a).Underlying() }

// Origin returns the generic Alias type of which a is an instance.
// If a is not an instance of a generic alias, Origin returns a.
func (a *Alias) Origin() *Alias { return a.orig }

// TypeParams returns the type parameters of the alias type a, or nil.

	-run=""
		if non-empty, specifies a regular expression to select
		directives whose full original source text (excluding
		any trailing spaces and final newline) matches the
		expression.

	-skip=""
		if non-empty, specifies a regular expression to suppress
		directives whose full original source text (excluding
		any trailing spaces and final newline) matches the

	var upper decimal
	upper.init(tmp.add(mant, natOne), exp)

	// The upper and lower bounds are possible outputs only if
	// the original mantissa is even, so that ToNearestEven rounding
	// would round to the original mantissa and not the neighbors.
	inclusive := mant[0]&2 == 0 // test bit 1 since original mantissa was shifted by 1

	// Now we can figure out the minimum number of digits required.

}

// safeExpr returns a safe version of n.
// The definition of safe is that n can appear multiple times
// without violating the semantics of the original program,
// and that assigning to the safe version has the same effect
// as assigning to the original n.
//
// The intended use is to apply to x when rewriting x += y into x = x + y.
func (o *orderState) safeExpr(n ir.Node) ir.Node {
	switch n.Op() {

// GoSyscallStart+GoSyscallEnd, unless we observe a GoSysBlock, in which case we
// emit a GoSyscallStart+GoSyscallEndBlocked pair with the correct duration
// (i.e. starting at the original GoSyscall).
//
// The resulting trace treats the old trace as a single, large generation,
// sharing a single evTable for all events.
//
// We use a new (compared to what was used for 'go tool trace' in earlier

//
// Given a value of one of Go's predeclared string, bool, or
// (non-complex) numeric types, AnyValue returns a Value of kind
// [KindString], [KindBool], [KindUint64], [KindInt64], or [KindFloat64].
// The width of the original numeric type is not preserved.
//
// Given a [time.Time] or [time.Duration] value, AnyValue returns a Value of kind
// [KindTime] or [KindDuration]. The monotonic time is not preserved.
//

//
// [underlying type]: https://go.dev/ref/spec#Underlying_types.
func (a *Alias) Underlying() Type { return unalias(a).Underlying() }

// Origin returns the generic Alias type of which a is an instance.
// If a is not an instance of a generic alias, Origin returns a.
func (a *Alias) Origin() *Alias { return a.orig }

// TypeParams returns the type parameters of the alias type a, or nil.

// It is also valid to use &^ to round pointers, usually for alignment.
// In all cases, the result must continue to point into the original allocated object.
//
// Unlike in C, it is not valid to advance a pointer just beyond the end of
// its original allocation:
//
//	// INVALID: end points outside allocated space.
//	var s thing
//	end = unsafe.Pointer(uintptr(unsafe.Pointer(&s)) + unsafe.Sizeof(s))
//