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grammar.peg.go
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grammar.peg.go
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package naturaldate
// Code generated by peg -inline -switch grammar.peg DO NOT EDIT
import (
"fmt"
"io"
"os"
"sort"
"strconv"
"time"
)
const endSymbol rune = 1114112
/* The rule types inferred from the grammar are below. */
type pegRule uint8
const (
ruleUnknown pegRule = iota
ruleQuery
ruleExpr
ruleRelativeMinutes
ruleRelativeHours
ruleRelativeDays
ruleRelativeWeeks
ruleRelativeMonth
ruleRelativeYear
ruleRelativeWeekdays
ruleDate
ruleTime
ruleClock12Hour
ruleClock24Hour
ruleMinutes
ruleSeconds
ruleNumber
ruleWeekday
ruleMonth
ruleIn
ruleLast
ruleNext
ruleOrdinal
ruleWord
ruleYEARS
ruleMONTHS
ruleWEEKS
ruleDAYS
ruleHOURS
ruleMINUTES
ruleYESTERDAY
ruleTOMORROW
ruleTODAY
ruleAGO
ruleFROM_NOW
ruleNOW
ruleAM
rulePM
ruleNEXT
ruleIN
ruleLAST
rule_
ruleWhitespace
ruleEOL
ruleEOF
ruleAction0
ruleAction1
ruleAction2
ruleAction3
ruleAction4
ruleAction5
ruleAction6
ruleAction7
ruleAction8
ruleAction9
ruleAction10
ruleAction11
ruleAction12
ruleAction13
ruleAction14
ruleAction15
ruleAction16
ruleAction17
ruleAction18
ruleAction19
ruleAction20
ruleAction21
ruleAction22
ruleAction23
ruleAction24
ruleAction25
ruleAction26
ruleAction27
ruleAction28
ruleAction29
ruleAction30
ruleAction31
ruleAction32
ruleAction33
ruleAction34
ruleAction35
ruleAction36
ruleAction37
ruleAction38
ruleAction39
ruleAction40
ruleAction41
ruleAction42
ruleAction43
ruleAction44
rulePegText
ruleAction45
ruleAction46
ruleAction47
ruleAction48
ruleAction49
ruleAction50
ruleAction51
ruleAction52
ruleAction53
ruleAction54
ruleAction55
ruleAction56
ruleAction57
ruleAction58
ruleAction59
ruleAction60
ruleAction61
ruleAction62
ruleAction63
ruleAction64
ruleAction65
ruleAction66
ruleAction67
ruleAction68
ruleAction69
ruleAction70
ruleAction71
ruleAction72
ruleAction73
ruleAction74
ruleAction75
ruleAction76
ruleAction77
)
var rul3s = [...]string{
"Unknown",
"Query",
"Expr",
"RelativeMinutes",
"RelativeHours",
"RelativeDays",
"RelativeWeeks",
"RelativeMonth",
"RelativeYear",
"RelativeWeekdays",
"Date",
"Time",
"Clock12Hour",
"Clock24Hour",
"Minutes",
"Seconds",
"Number",
"Weekday",
"Month",
"In",
"Last",
"Next",
"Ordinal",
"Word",
"YEARS",
"MONTHS",
"WEEKS",
"DAYS",
"HOURS",
"MINUTES",
"YESTERDAY",
"TOMORROW",
"TODAY",
"AGO",
"FROM_NOW",
"NOW",
"AM",
"PM",
"NEXT",
"IN",
"LAST",
"_",
"Whitespace",
"EOL",
"EOF",
"Action0",
"Action1",
"Action2",
"Action3",
"Action4",
"Action5",
"Action6",
"Action7",
"Action8",
"Action9",
"Action10",
"Action11",
"Action12",
"Action13",
"Action14",
"Action15",
"Action16",
"Action17",
"Action18",
"Action19",
"Action20",
"Action21",
"Action22",
"Action23",
"Action24",
"Action25",
"Action26",
"Action27",
"Action28",
"Action29",
"Action30",
"Action31",
"Action32",
"Action33",
"Action34",
"Action35",
"Action36",
"Action37",
"Action38",
"Action39",
"Action40",
"Action41",
"Action42",
"Action43",
"Action44",
"PegText",
"Action45",
"Action46",
"Action47",
"Action48",
"Action49",
"Action50",
"Action51",
"Action52",
"Action53",
"Action54",
"Action55",
"Action56",
"Action57",
"Action58",
"Action59",
"Action60",
"Action61",
"Action62",
"Action63",
"Action64",
"Action65",
"Action66",
"Action67",
"Action68",
"Action69",
"Action70",
"Action71",
"Action72",
"Action73",
"Action74",
"Action75",
"Action76",
"Action77",
}
type token32 struct {
pegRule
begin, end uint32
}
func (t *token32) String() string {
return fmt.Sprintf("\x1B[34m%v\x1B[m %v %v", rul3s[t.pegRule], t.begin, t.end)
}
type node32 struct {
token32
up, next *node32
}
func (node *node32) print(w io.Writer, pretty bool, buffer string) {
var print func(node *node32, depth int)
print = func(node *node32, depth int) {
for node != nil {
for c := 0; c < depth; c++ {
fmt.Fprintf(w, " ")
}
rule := rul3s[node.pegRule]
quote := strconv.Quote(string(([]rune(buffer)[node.begin:node.end])))
if !pretty {
fmt.Fprintf(w, "%v %v\n", rule, quote)
} else {
fmt.Fprintf(w, "\x1B[34m%v\x1B[m %v\n", rule, quote)
}
if node.up != nil {
print(node.up, depth+1)
}
node = node.next
}
}
print(node, 0)
}
func (node *node32) Print(w io.Writer, buffer string) {
node.print(w, false, buffer)
}
func (node *node32) PrettyPrint(w io.Writer, buffer string) {
node.print(w, true, buffer)
}
type tokens32 struct {
tree []token32
}
func (t *tokens32) Trim(length uint32) {
t.tree = t.tree[:length]
}
func (t *tokens32) Print() {
for _, token := range t.tree {
fmt.Println(token.String())
}
}
func (t *tokens32) AST() *node32 {
type element struct {
node *node32
down *element
}
tokens := t.Tokens()
var stack *element
for _, token := range tokens {
if token.begin == token.end {
continue
}
node := &node32{token32: token}
for stack != nil && stack.node.begin >= token.begin && stack.node.end <= token.end {
stack.node.next = node.up
node.up = stack.node
stack = stack.down
}
stack = &element{node: node, down: stack}
}
if stack != nil {
return stack.node
}
return nil
}
func (t *tokens32) PrintSyntaxTree(buffer string) {
t.AST().Print(os.Stdout, buffer)
}
func (t *tokens32) WriteSyntaxTree(w io.Writer, buffer string) {
t.AST().Print(w, buffer)
}
func (t *tokens32) PrettyPrintSyntaxTree(buffer string) {
t.AST().PrettyPrint(os.Stdout, buffer)
}
func (t *tokens32) Add(rule pegRule, begin, end, index uint32) {
tree, i := t.tree, int(index)
if i >= len(tree) {
t.tree = append(tree, token32{pegRule: rule, begin: begin, end: end})
return
}
tree[i] = token32{pegRule: rule, begin: begin, end: end}
}
func (t *tokens32) Tokens() []token32 {
return t.tree
}
type parser struct {
t time.Time
number int
month time.Month
weekday time.Weekday
direction int
Buffer string
buffer []rune
rules [124]func() bool
parse func(rule ...int) error
reset func()
Pretty bool
tokens32
}
func (p *parser) Parse(rule ...int) error {
return p.parse(rule...)
}
func (p *parser) Reset() {
p.reset()
}
type textPosition struct {
line, symbol int
}
type textPositionMap map[int]textPosition
func translatePositions(buffer []rune, positions []int) textPositionMap {
length, translations, j, line, symbol := len(positions), make(textPositionMap, len(positions)), 0, 1, 0
sort.Ints(positions)
search:
for i, c := range buffer {
if c == '\n' {
line, symbol = line+1, 0
} else {
symbol++
}
if i == positions[j] {
translations[positions[j]] = textPosition{line, symbol}
for j++; j < length; j++ {
if i != positions[j] {
continue search
}
}
break search
}
}
return translations
}
type parseError struct {
p *parser
max token32
}
func (e *parseError) Error() string {
tokens, err := []token32{e.max}, "\n"
positions, p := make([]int, 2*len(tokens)), 0
for _, token := range tokens {
positions[p], p = int(token.begin), p+1
positions[p], p = int(token.end), p+1
}
translations := translatePositions(e.p.buffer, positions)
format := "parse error near %v (line %v symbol %v - line %v symbol %v):\n%v\n"
if e.p.Pretty {
format = "parse error near \x1B[34m%v\x1B[m (line %v symbol %v - line %v symbol %v):\n%v\n"
}
for _, token := range tokens {
begin, end := int(token.begin), int(token.end)
err += fmt.Sprintf(format,
rul3s[token.pegRule],
translations[begin].line, translations[begin].symbol,
translations[end].line, translations[end].symbol,
strconv.Quote(string(e.p.buffer[begin:end])))
}
return err
}
func (p *parser) PrintSyntaxTree() {
if p.Pretty {
p.tokens32.PrettyPrintSyntaxTree(p.Buffer)
} else {
p.tokens32.PrintSyntaxTree(p.Buffer)
}
}
func (p *parser) WriteSyntaxTree(w io.Writer) {
p.tokens32.WriteSyntaxTree(w, p.Buffer)
}
func (p *parser) Execute() {
buffer, _buffer, text, begin, end := p.Buffer, p.buffer, "", 0, 0
for _, token := range p.Tokens() {
switch token.pegRule {
case rulePegText:
begin, end = int(token.begin), int(token.end)
text = string(_buffer[begin:end])
case ruleAction0:
p.t = p.t.Add(-time.Minute * time.Duration(p.number))
case ruleAction1:
p.t = p.t.Add(time.Minute * time.Duration(p.number))
case ruleAction2:
p.t = p.t.Add(-time.Minute * time.Duration(p.number))
case ruleAction3:
p.t = p.t.Add(time.Minute * time.Duration(p.number))
case ruleAction4:
p.t = p.t.Add(p.withDirection(time.Minute) * time.Duration(p.number))
case ruleAction5:
p.t = p.t.Add(-time.Hour * time.Duration(p.number))
case ruleAction6:
p.t = p.t.Add(time.Hour * time.Duration(p.number))
case ruleAction7:
p.t = p.t.Add(-time.Hour * time.Duration(p.number))
case ruleAction8:
p.t = p.t.Add(time.Hour * time.Duration(p.number))
case ruleAction9:
p.t = p.t.Add(p.withDirection(time.Hour) * time.Duration(p.number))
case ruleAction10:
p.t = truncateDay(p.t.Add(-day * time.Duration(p.number)))
case ruleAction11:
p.t = p.t.Add(day * time.Duration(p.number))
case ruleAction12:
p.t = truncateDay(p.t.Add(-day * time.Duration(p.number)))
case ruleAction13:
p.t = truncateDay(p.t.Add(day * time.Duration(p.number)))
case ruleAction14:
p.t = truncateDay(p.t.Add(p.withDirection(day) * time.Duration(p.number)))
case ruleAction15:
p.t = truncateDay(p.t.Add(-week * time.Duration(p.number)))
case ruleAction16:
p.t = p.t.Add(week * time.Duration(p.number))
case ruleAction17:
p.t = truncateDay(p.t.Add(-week * time.Duration(p.number)))
case ruleAction18:
p.t = truncateDay(p.t.Add(week * time.Duration(p.number)))
case ruleAction19:
p.t = truncateDay(p.t.Add(p.withDirection(week) * time.Duration(p.number)))
case ruleAction20:
p.t = p.t.AddDate(0, -p.number, 0)
case ruleAction21:
p.t = p.t.AddDate(0, p.number, 0)
case ruleAction22:
p.t = p.t.AddDate(0, -p.number, 0)
case ruleAction23:
p.t = p.t.AddDate(0, p.number, 0)
case ruleAction24:
p.t = prevMonth(p.t, p.month)
case ruleAction25:
p.t = nextMonth(p.t, p.month)
case ruleAction26:
if p.direction < 0 {
p.t = prevMonth(p.t, p.month)
} else {
p.t = nextMonth(p.t, p.month)
}
case ruleAction27:
p.t = p.t.AddDate(-p.number, 0, 0)
case ruleAction28:
p.t = p.t.AddDate(p.number, 0, 0)
case ruleAction29:
p.t = p.t.AddDate(-p.number, 0, 0)
case ruleAction30:
p.t = p.t.AddDate(p.number, 0, 0)
case ruleAction31:
p.t = time.Date(p.t.Year()-1, 1, 1, 0, 0, 0, 0, p.t.Location())
case ruleAction32:
p.t = time.Date(p.t.Year()+1, 1, 1, 0, 0, 0, 0, p.t.Location())
case ruleAction33:
p.t = truncateDay(p.t)
case ruleAction34:
p.t = truncateDay(p.t.Add(-day))
case ruleAction35:
p.t = truncateDay(p.t.Add(+day))
case ruleAction36:
p.t = truncateDay(prevWeekday(p.t, p.weekday))
case ruleAction37:
p.t = truncateDay(nextWeekday(p.t, p.weekday))
case ruleAction38:
if p.direction < 0 {
p.t = truncateDay(prevWeekday(p.t, p.weekday))
} else {
p.t = truncateDay(nextWeekday(p.t, p.weekday))
}
case ruleAction39:
t := p.t
year, month, _ := t.Date()
hour, min, sec := t.Clock()
p.t = time.Date(year, month, p.number, hour, min, sec, 0, t.Location())
case ruleAction40:
year, month, day := p.t.Date()
p.t = time.Date(year, month, day, p.number, 0, 0, 0, p.t.Location())
case ruleAction41:
year, month, day := p.t.Date()
p.t = time.Date(year, month, day, p.number+12, 0, 0, 0, p.t.Location())
case ruleAction42:
year, month, day := p.t.Date()
p.t = time.Date(year, month, day, p.number, 0, 0, 0, p.t.Location())
case ruleAction43:
t := p.t
year, month, day := t.Date()
hour, _, _ := t.Clock()
p.t = time.Date(year, month, day, hour, p.number, 0, 0, t.Location())
case ruleAction44:
t := p.t
year, month, day := t.Date()
hour, min, _ := t.Clock()
p.t = time.Date(year, month, day, hour, min, p.number, 0, t.Location())
case ruleAction45:
n, _ := strconv.Atoi(text)
p.number = n
case ruleAction46:
p.number = 1
case ruleAction47:
p.number = 2
case ruleAction48:
p.number = 3
case ruleAction49:
p.number = 4
case ruleAction50:
p.number = 5
case ruleAction51:
p.number = 6
case ruleAction52:
p.number = 7
case ruleAction53:
p.number = 8
case ruleAction54:
p.number = 9
case ruleAction55:
p.number = 10
case ruleAction56:
p.weekday = time.Sunday
case ruleAction57:
p.weekday = time.Monday
case ruleAction58:
p.weekday = time.Tuesday
case ruleAction59:
p.weekday = time.Wednesday
case ruleAction60:
p.weekday = time.Thursday
case ruleAction61:
p.weekday = time.Friday
case ruleAction62:
p.weekday = time.Saturday
case ruleAction63:
p.month = time.January
case ruleAction64:
p.month = time.February
case ruleAction65:
p.month = time.March
case ruleAction66:
p.month = time.April
case ruleAction67:
p.month = time.May
case ruleAction68:
p.month = time.June
case ruleAction69:
p.month = time.July
case ruleAction70:
p.month = time.August
case ruleAction71:
p.month = time.September
case ruleAction72:
p.month = time.October
case ruleAction73:
p.month = time.November
case ruleAction74:
p.month = time.December
case ruleAction75:
p.number = 1
case ruleAction76:
p.number = 1
case ruleAction77:
p.number = 1
}
}
_, _, _, _, _ = buffer, _buffer, text, begin, end
}
func Pretty(pretty bool) func(*parser) error {
return func(p *parser) error {
p.Pretty = pretty
return nil
}
}
func Size(size int) func(*parser) error {
return func(p *parser) error {
p.tokens32 = tokens32{tree: make([]token32, 0, size)}
return nil
}
}
func (p *parser) Init(options ...func(*parser) error) error {
var (
max token32
position, tokenIndex uint32
buffer []rune
)
for _, option := range options {
err := option(p)
if err != nil {
return err
}
}
p.reset = func() {
max = token32{}
position, tokenIndex = 0, 0
p.buffer = []rune(p.Buffer)
if len(p.buffer) == 0 || p.buffer[len(p.buffer)-1] != endSymbol {
p.buffer = append(p.buffer, endSymbol)
}
buffer = p.buffer
}
p.reset()
_rules := p.rules
tree := p.tokens32
p.parse = func(rule ...int) error {
r := 1
if len(rule) > 0 {
r = rule[0]
}
matches := p.rules[r]()
p.tokens32 = tree
if matches {
p.Trim(tokenIndex)
return nil
}
return &parseError{p, max}
}
add := func(rule pegRule, begin uint32) {
tree.Add(rule, begin, position, tokenIndex)
tokenIndex++
if begin != position && position > max.end {
max = token32{rule, begin, position}
}
}
matchDot := func() bool {
if buffer[position] != endSymbol {
position++
return true
}
return false
}
/*matchChar := func(c byte) bool {
if buffer[position] == c {
position++
return true
}
return false
}*/
/*matchRange := func(lower byte, upper byte) bool {
if c := buffer[position]; c >= lower && c <= upper {
position++
return true
}
return false
}*/
_rules = [...]func() bool{
nil,
/* 0 Query <- <(_ Expr+ EOF)> */
func() bool {
position0, tokenIndex0 := position, tokenIndex
{
position1 := position
if !_rules[rule_]() {
goto l0
}
{
position4 := position
{
position5, tokenIndex5 := position, tokenIndex
{
position7 := position
if buffer[position] != rune('n') {
goto l6
}
position++
if buffer[position] != rune('o') {
goto l6
}
position++
if buffer[position] != rune('w') {
goto l6
}
position++
if !_rules[rule_]() {
goto l6
}
add(ruleNOW, position7)
}
goto l5
l6:
position, tokenIndex = position5, tokenIndex5
{
position9 := position
{
position10, tokenIndex10 := position, tokenIndex
if !_rules[ruleNumber]() {
goto l11
}
if !_rules[ruleMINUTES]() {
goto l11
}
if !_rules[ruleAGO]() {
goto l11
}
{
add(ruleAction0, position)
}
goto l10
l11:
position, tokenIndex = position10, tokenIndex10
{
position14, tokenIndex14 := position, tokenIndex
if !_rules[ruleNumber]() {
goto l15
}
if !_rules[ruleMINUTES]() {
goto l15
}
if !_rules[ruleFROM_NOW]() {
goto l15
}
goto l14
l15:
position, tokenIndex = position14, tokenIndex14
if !_rules[ruleIn]() {
goto l13
}
{
position16, tokenIndex16 := position, tokenIndex
if !_rules[ruleNumber]() {
goto l16
}
goto l17
l16:
position, tokenIndex = position16, tokenIndex16
}
l17:
if !_rules[ruleMINUTES]() {
goto l13
}
{
position18, tokenIndex18 := position, tokenIndex
if !_rules[ruleFROM_NOW]() {
goto l18
}
goto l19
l18:
position, tokenIndex = position18, tokenIndex18
}
l19:
}
l14:
{
add(ruleAction1, position)
}
goto l10
l13:
position, tokenIndex = position10, tokenIndex10
if !_rules[ruleLast]() {
goto l21
}
{
position22, tokenIndex22 := position, tokenIndex
if !_rules[ruleNumber]() {
goto l22
}
goto l23
l22:
position, tokenIndex = position22, tokenIndex22
}
l23:
if !_rules[ruleMINUTES]() {
goto l21
}
{
add(ruleAction2, position)
}
goto l10
l21:
position, tokenIndex = position10, tokenIndex10
if !_rules[ruleNext]() {
goto l25
}
{
position26, tokenIndex26 := position, tokenIndex
if !_rules[ruleNumber]() {
goto l26
}
goto l27
l26:
position, tokenIndex = position26, tokenIndex26
}
l27:
if !_rules[ruleMINUTES]() {
goto l25
}
{
add(ruleAction3, position)
}
goto l10
l25:
position, tokenIndex = position10, tokenIndex10
if !_rules[ruleNumber]() {
goto l8
}
if !_rules[ruleMINUTES]() {
goto l8
}
{
add(ruleAction4, position)
}