// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package unicode

// Bit masks for each code point under U+0100, for fast lookup.
const (
	pC     = 1 << iota // a control character.
	pP                 // a punctuation character.
	pN                 // a numeral.
	pS                 // a symbolic character.
	pZ                 // a spacing character.

// A position describes what is expected to appear in an argument position.
type position int

const (
	// key is an argument position that should hold a string key or an Attr.
	key position = iota
	// value is an argument position that should hold a value.
	value
	// unknown represents that we do not know if position should hold a key or a value.
	unknown
)

func run(pass *analysis.Pass) (any, error) {

	wanted     [(_NSIG + 31) / 32]uint32
	ignored    [(_NSIG + 31) / 32]uint32
	recv       [(_NSIG + 31) / 32]uint32
	state      atomic.Uint32
	delivering atomic.Uint32
	inuse      bool
}

const (
	sigIdle = iota
	sigReceiving
	sigSending
)

// sigsend delivers a signal from sighandler to the internal signal delivery queue.
// It reports whether the signal was sent. If not, the caller typically crashes the program.

	// inaccessible   x.foo   !=    foo    cannot refer to unexported field foo
	// missing        x.foo   !=    foO    type X has no field or method foo

	const (
		ok           = iota
		missing      // no object found
		misspelled   // found object with different spelling
		unexported   // found object with name differing only in first letter

		// TODO(gri) We may also want to augment the error message and
		// refer to the position (pos) in the original expression.
		if check.errpos != nil && check.errpos.Pos().IsValid() {
			assert(check.iota != nil)
			posn = check.errpos
		}

		// Report invalid syntax trees explicitly.
		if code == InvalidSyntaxTree {
			msg = "invalid syntax tree: " + msg
		}

// Runtime -> tracer API for memory events.

package runtime

import (
	"internal/abi"
	"runtime/internal/sys"
)

// Batch type values for the alloc/free experiment.
const (
	traceAllocFreeTypesBatch = iota // Contains types. [{id, address, size, ptrspan, name length, name string} ...]
	traceAllocFreeInfoBatch         // Contains info for interpreting events. [min heap addr, page size, min heap align, min stack align]
)

	succs2 [2]*Block // underlying array for Succs
}

// A BlockKind identifies the purpose of a block.
// It also determines the possible types of its Stmt field.
type BlockKind uint8

const (
	KindInvalid BlockKind = iota // Stmt=nil

	KindUnreachable     // unreachable block after {Branch,Return}Stmt / no-return call ExprStmt
	KindBody            // function body BlockStmt
	KindForBody         // body of ForStmt

	return i, i < n && cmp(x[i], target) == 0
}

type sortedHint int // hint for pdqsort when choosing the pivot

const (
	unknownHint sortedHint = iota
	increasingHint
	decreasingHint
)

// xorshift paper: https://www.jstatsoft.org/article/view/v008i14/xorshift.pdf
type xorshift uint64

func (r *xorshift) Next() uint64 {
	*r ^= *r << 13

type fieldInfo struct {
	idx     []int
	name    string
	xmlns   string
	flags   fieldFlags
	parents []string
}

type fieldFlags int

const (
	fElement fieldFlags = 1 << iota
	fAttr
	fCDATA
	fCharData
	fInnerXML
	fComment
	fAny

	fOmitEmpty

	fMode = fElement | fAttr | fCDATA | fCharData | fInnerXML | fComment | fAny

	xmlName = "XMLName"
)

package image

import (
	"image/color"
)

// YCbCrSubsampleRatio is the chroma subsample ratio used in a YCbCr image.
type YCbCrSubsampleRatio int

const (
	YCbCrSubsampleRatio444 YCbCrSubsampleRatio = iota
	YCbCrSubsampleRatio422
	YCbCrSubsampleRatio420
	YCbCrSubsampleRatio440
	YCbCrSubsampleRatio411
	YCbCrSubsampleRatio410
)

func (s YCbCrSubsampleRatio) String() string {
	switch s {