errorf := func(tpar, targ Type, arg *operand) {
		// provide a better error message if we can
		targs := u.inferred(tparams)
		if targs[0] == nil {
			// The first type parameter couldn't be inferred.
			// If none of them could be inferred, don't try
			// to provide the inferred type in the error msg.
			allFailed := true
			for _, targ := range targs {
				if targ != nil {

duration of a C function call. Memory may be pinned more than once and
must be unpinned exactly the same number of times it has been pinned.

Go code may pass a Go pointer to C provided the memory to which it
points does not contain any Go pointers to memory that is unpinned. When
passing a pointer to a field in a struct, the Go memory in question is

package tar

import (
	"errors"
	"fmt"
	"io"
	"io/fs"
	"path"
	"slices"
	"strings"
	"time"
)

// Writer provides sequential writing of a tar archive.
// [Writer.WriteHeader] begins a new file with the provided [Header],
// and then Writer can be treated as an io.Writer to supply that file's data.
type Writer struct {
	w    io.Writer

	if isInteger(x.typ) {
		msg = "invalid array length %s"
	} else {
		msg = "array length %s must be integer"
	}
	check.errorf(&x, InvalidArrayLen, msg, &x)
	return -1
}

// typeList provides the list of types corresponding to the incoming expression list.
// If an error occurred, the result is nil, but all list elements were type-checked.
func (check *Checker) typeList(list []syntax.Expr) []Type {

//    type or methods, so that we may resolve recursive references.
//  - When loading from export data, we may load its methods and underlying
//    type lazily using a provided load function.
//  - After instantiating, we lazily expand the underlying type and methods
//    (note that instances may be created while still in the process of
//    type-checking the original type declaration).
//

//    type or methods, so that we may resolve recursive references.
//  - When loading from export data, we may load its methods and underlying
//    type lazily using a provided load function.
//  - After instantiating, we lazily expand the underlying type and methods
//    (note that instances may be created while still in the process of
//    type-checking the original type declaration).
//

}

// ServeFile replies to the request with the contents of the named
// file or directory.
//
// If the provided file or directory name is a relative path, it is
// interpreted relative to the current directory and may ascend to
// parent directories. If the provided name is constructed from user
// input, it should be sanitized before calling [ServeFile].
//

	"strings"
)

// funcInst type-checks a function instantiation.
// The incoming x must be a generic function.
// If inst != nil, it provides some or all of the type arguments (inst.Index).
// If target != nil, it may be used to infer missing type arguments of x, if any.
// At least one of T or inst must be provided.
//
// There are two modes of operation:
//
//  1. If infer == true, funcInst infers missing type arguments as needed and

		}
	}

	inst := (*Checker)(nil).instance(nopos, orig_, targs, nil, ctxt)
	return inst, nil
}

// instance instantiates the given original (generic) function or type with the
// provided type arguments and returns the resulting instance. If an identical
// instance exists already in the given contexts, it returns that instance,
// otherwise it creates a new one.
//

	"strings"
)

// funcInst type-checks a function instantiation.
// The incoming x must be a generic function.
// If ix != nil, it provides some or all of the type arguments (ix.Indices).
// If target != nil, it may be used to infer missing type arguments of x, if any.
// At least one of T or ix must be provided.
//
// There are two modes of operation:
//
//  1. If infer == true, funcInst infers missing type arguments as needed and