Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.

package idna
This file contains definitions for interpreting the trie value of the idna trie generated by "go run gen*.go". It is shared by both the generator program and the resultant package. Sharing is achieved by the generator copying gen_trieval.go to trieval.go and changing what's above this comment.
info holds information from the IDNA mapping table for a single rune. It is the value returned by a trie lookup. In most cases, all information fits in a 16-bit value. For mappings, this value may contain an index into a slice with the mapped string. Such mappings can consist of the actual mapped value or an XOR pattern to be applied to the bytes of the UTF8 encoding of the input rune. This technique is used by the cases packages and reduces the table size significantly. The per-rune values have the following format: if mapped { if inlinedXOR { 15..13 inline XOR marker 12..11 unused 10..3 inline XOR mask } else { 15..3 index into xor or mapping table } } else { 15..14 unused 13 mayNeedNorm 12..11 attributes 10..8 joining type 7..3 category type } 2 use xor pattern 1..0 mapped category See the definitions below for a more detailed description of the various bits.
type info uint16

const (
	catSmallMask = 0x3
	catBigMask   = 0xF8
	indexShift   = 3
	xorBit       = 0x4    // interpret the index as an xor pattern
	inlineXOR    = 0xE000 // These bits are set if the XOR pattern is inlined.

	joinShift = 8
	joinMask  = 0x07
Attributes
	attributesMask = 0x1800
	viramaModifier = 0x1800
	modifier       = 0x1000
	rtl            = 0x0800

	mayNeedNorm = 0x2000
)
A category corresponds to a category defined in the IDNA mapping table.
type category uint16

const (
	unknown              category = 0 // not currently defined in unicode.
	mapped               category = 1
	disallowedSTD3Mapped category = 2
	deviation            category = 3
)

const (
	valid               category = 0x08
	validNV8            category = 0x18
	validXV8            category = 0x28
	disallowed          category = 0x40
	disallowedSTD3Valid category = 0x80
	ignored             category = 0xC0
)
join types and additional rune information
const (
	joiningL = (iota + 1)
	joiningD
	joiningT
	joiningR
the following types are derived during processing
	joinZWJ
	joinZWNJ
	joinVirama
	numJoinTypes
)

func ( info) () bool {
	return &0x3 != 0
}

func ( info) () category {
	 :=  & catSmallMask
	if  != 0 {
		return category()
	}
	return category( & catBigMask)
}

func ( info) () info {
	if .isMapped() {
		return 0
	}
	return ( >> joinShift) & joinMask
}

func ( info) () bool {
	return &(modifier|catSmallMask) == modifier
}

func ( info) () bool {
	return &(attributesMask|catSmallMask) == viramaModifier