// Code generated by goyacc -o datemath.y.go datemath.y. DO NOT EDIT.
//line datemath.y:8
package datemath
import __yyfmt__ "fmt"
//line datemath.y:8
import (
"fmt"
"math"
"time"
)
var epoch = time.Unix(0, 0).In(time.UTC)
// convert a list of significant digits to an integer
// assumes most to least significant
// e.g. 5,2,3 -> 523
func digitsToInt(digits ...int) int {
n := 0
for i := range digits {
n += digits[i] * int(math.Pow10(len(digits)-i-1))
}
return n
}
//line datemath.y:34
type yySymType struct {
yys int
i64 int64
i int
unit timeUnit
month time.Month
expression mathExpression
anchorDateExpression anchorDateExpression
timeAdjuster timeAdjuster
timeAdjusters []timeAdjuster
location *time.Location
time time.Time
}
const tNOW = 57346
const tPLUS = 57347
const tMINUS = 57348
const tPIPES = 57349
const tBACKSLASH = 57350
const tTIME_DELIMITER = 57351
const tCOLON = 57352
const tDOT = 57353
const tUNIT = 57354
const tUTC = 57355
const tDIGIT = 57356
const tINVALID_TOKEN = 57357
var yyToknames = [...]string{
"$end",
"error",
"$unk",
"tNOW",
"tPLUS",
"tMINUS",
"tPIPES",
"tBACKSLASH",
"tTIME_DELIMITER",
"tCOLON",
"tDOT",
"tUNIT",
"tUTC",
"tDIGIT",
"tINVALID_TOKEN",
}
var yyStatenames = [...]string{}
const yyEofCode = 1
const yyErrCode = 2
const yyInitialStackSize = 16
//line datemath.y:300
//line yacctab:1
var yyExca = [...]int{
-1, 1,
1, -1,
-2, 0,
}
const yyPrivate = 57344
const yyLast = 65
var yyAct = [...]int{
14, 6, 17, 16, 4, 12, 63, 62, 61, 60,
40, 42, 59, 56, 10, 54, 53, 23, 52, 24,
29, 51, 49, 47, 46, 45, 43, 41, 37, 35,
39, 34, 32, 30, 27, 22, 19, 36, 28, 55,
57, 44, 17, 16, 21, 15, 11, 18, 20, 1,
38, 13, 7, 3, 5, 2, 31, 58, 50, 33,
9, 48, 8, 26, 25,
}
var yyPact = [...]int{
0, -1000, -1000, 39, 37, 38, -1000, 22, 42, 34,
21, 37, -1000, 37, 20, 26, -1000, -1000, 19, -1000,
18, 17, 15, -1000, -1000, 25, 14, -1000, -1000, -3,
13, 5, 12, 31, 11, 10, -1000, -1000, -1000, 9,
-1000, -1000, 8, -1000, 7, -1000, 4, 2, -1000, 1,
28, -1, -1000, 30, -1000, -2, -1000, -5, -1000, -6,
-7, -8, -1000, -1000,
}
var yyPgo = [...]int{
0, 0, 64, 63, 62, 61, 60, 59, 58, 57,
56, 55, 54, 1, 53, 52, 5, 51, 50, 49,
}
var yyR1 = [...]int{
0, 19, 11, 11, 11, 11, 11, 14, 14, 14,
14, 18, 18, 18, 12, 12, 12, 13, 13, 13,
13, 4, 10, 5, 6, 7, 8, 9, 9, 9,
16, 16, 17, 17, 1, 1, 2, 2, 3, 3,
15, 15,
}
var yyR2 = [...]int{
0, 1, 1, 2, 3, 1, 2, 1, 1, 4,
1, 0, 6, 1, 1, 3, 5, 1, 3, 5,
7, 4, 2, 2, 2, 2, 2, 1, 2, 3,
2, 1, 3, 2, 1, 1, 0, 1, 1, 2,
5, 2,
}
var yyChk = [...]int{
-1000, -19, -11, -14, 4, -12, -13, -15, -4, -6,
14, 7, -16, -17, -1, 8, 6, 5, 9, 14,
6, 10, 14, -16, -16, -2, -3, 14, 12, -13,
14, -10, 14, -7, 14, 14, 12, 14, -18, -1,
13, 14, 6, 14, 10, 14, 14, 14, -5, 14,
-8, 14, 14, 14, 14, 11, 14, 10, -9, 14,
14, 14, 14, 14,
}
var yyDef = [...]int{
0, -2, 1, 2, 5, 7, 8, 10, 14, 17,
0, 3, 6, 31, 36, 0, 34, 35, 0, 41,
0, 0, 24, 4, 30, 0, 37, 38, 33, 11,
0, 15, 0, 18, 0, 0, 32, 39, 9, 0,
13, 24, 0, 22, 0, 25, 21, 0, 16, 0,
19, 0, 40, 0, 23, 0, 26, 0, 20, 27,
0, 28, 12, 29,
}
var yyTok1 = [...]int{
1,
}
var yyTok2 = [...]int{
2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12, 13, 14, 15,
}
var yyTok3 = [...]int{
0,
}
var yyErrorMessages = [...]struct {
state int
token int
msg string
}{
{1, 15, "invalid token"},
}
//line yaccpar:1
/* parser for yacc output */
var (
yyDebug = 0
yyErrorVerbose = false
)
type yyLexer interface {
Lex(lval *yySymType) int
Error(s string)
}
type yyParser interface {
Parse(yyLexer) int
Lookahead() int
}
type yyParserImpl struct {
lval yySymType
stack [yyInitialStackSize]yySymType
char int
}
func (p *yyParserImpl) Lookahead() int {
return p.char
}
func yyNewParser() yyParser {
return &yyParserImpl{}
}
const yyFlag = -1000
func yyTokname(c int) string {
if c >= 1 && c-1 < len(yyToknames) {
if yyToknames[c-1] != "" {
return yyToknames[c-1]
}
}
return __yyfmt__.Sprintf("tok-%v", c)
}
func yyStatname(s int) string {
if s >= 0 && s < len(yyStatenames) {
if yyStatenames[s] != "" {
return yyStatenames[s]
}
}
return __yyfmt__.Sprintf("state-%v", s)
}
func yyErrorMessage(state, lookAhead int) string {
const TOKSTART = 4
if !yyErrorVerbose {
return "syntax error"
}
for _, e := range yyErrorMessages {
if e.state == state && e.token == lookAhead {
return "syntax error: " + e.msg
}
}
res := "syntax error: unexpected " + yyTokname(lookAhead)
// To match Bison, suggest at most four expected tokens.
expected := make([]int, 0, 4)
// Look for shiftable tokens.
base := yyPact[state]
for tok := TOKSTART; tok-1 < len(yyToknames); tok++ {
if n := base + tok; n >= 0 && n < yyLast && yyChk[yyAct[n]] == tok {
if len(expected) == cap(expected) {
return res
}
expected = append(expected, tok)
}
}
if yyDef[state] == -2 {
i := 0
for yyExca[i] != -1 || yyExca[i+1] != state {
i += 2
}
// Look for tokens that we accept or reduce.
for i += 2; yyExca[i] >= 0; i += 2 {
tok := yyExca[i]
if tok < TOKSTART || yyExca[i+1] == 0 {
continue
}
if len(expected) == cap(expected) {
return res
}
expected = append(expected, tok)
}
// If the default action is to accept or reduce, give up.
if yyExca[i+1] != 0 {
return res
}
}
for i, tok := range expected {
if i == 0 {
res += ", expecting "
} else {
res += " or "
}
res += yyTokname(tok)
}
return res
}
func yylex1(lex yyLexer, lval *yySymType) (char, token int) {
token = 0
char = lex.Lex(lval)
if char <= 0 {
token = yyTok1[0]
goto out
}
if char < len(yyTok1) {
token = yyTok1[char]
goto out
}
if char >= yyPrivate {
if char < yyPrivate+len(yyTok2) {
token = yyTok2[char-yyPrivate]
goto out
}
}
for i := 0; i < len(yyTok3); i += 2 {
token = yyTok3[i+0]
if token == char {
token = yyTok3[i+1]
goto out
}
}
out:
if token == 0 {
token = yyTok2[1] /* unknown char */
}
if yyDebug >= 3 {
__yyfmt__.Printf("lex %s(%d)\n", yyTokname(token), uint(char))
}
return char, token
}
func yyParse(yylex yyLexer) int {
return yyNewParser().Parse(yylex)
}
func (yyrcvr *yyParserImpl) Parse(yylex yyLexer) int {
var yyn int
var yyVAL yySymType
var yyDollar []yySymType
_ = yyDollar // silence set and not used
yyS := yyrcvr.stack[:]
Nerrs := 0 /* number of errors */
Errflag := 0 /* error recovery flag */
yystate := 0
yyrcvr.char = -1
yytoken := -1 // yyrcvr.char translated into internal numbering
defer func() {
// Make sure we report no lookahead when not parsing.
yystate = -1
yyrcvr.char = -1
yytoken = -1
}()
yyp := -1
goto yystack
ret0:
return 0
ret1:
return 1
yystack:
/* put a state and value onto the stack */
if yyDebug >= 4 {
__yyfmt__.Printf("char %v in %v\n", yyTokname(yytoken), yyStatname(yystate))
}
yyp++
if yyp >= len(yyS) {
nyys := make([]yySymType, len(yyS)*2)
copy(nyys, yyS)
yyS = nyys
}
yyS[yyp] = yyVAL
yyS[yyp].yys = yystate
yynewstate:
yyn = yyPact[yystate]
if yyn <= yyFlag {
goto yydefault /* simple state */
}
if yyrcvr.char < 0 {
yyrcvr.char, yytoken = yylex1(yylex, &yyrcvr.lval)
}
yyn += yytoken
if yyn < 0 || yyn >= yyLast {
goto yydefault
}
yyn = yyAct[yyn]
if yyChk[yyn] == yytoken { /* valid shift */
yyrcvr.char = -1
yytoken = -1
yyVAL = yyrcvr.lval
yystate = yyn
if Errflag > 0 {
Errflag--
}
goto yystack
}
yydefault:
/* default state action */
yyn = yyDef[yystate]
if yyn == -2 {
if yyrcvr.char < 0 {
yyrcvr.char, yytoken = yylex1(yylex, &yyrcvr.lval)
}
/* look through exception table */
xi := 0
for {
if yyExca[xi+0] == -1 && yyExca[xi+1] == yystate {
break
}
xi += 2
}
for xi += 2; ; xi += 2 {
yyn = yyExca[xi+0]
if yyn < 0 || yyn == yytoken {
break
}
}
yyn = yyExca[xi+1]
if yyn < 0 {
goto ret0
}
}
if yyn == 0 {
/* error ... attempt to resume parsing */
switch Errflag {
case 0: /* brand new error */
yylex.Error(yyErrorMessage(yystate, yytoken))
Nerrs++
if yyDebug >= 1 {
__yyfmt__.Printf("%s", yyStatname(yystate))
__yyfmt__.Printf(" saw %s\n", yyTokname(yytoken))
}
fallthrough
case 1, 2: /* incompletely recovered error ... try again */
Errflag = 3
/* find a state where "error" is a legal shift action */
for yyp >= 0 {
yyn = yyPact[yyS[yyp].yys] + yyErrCode
if yyn >= 0 && yyn < yyLast {
yystate = yyAct[yyn] /* simulate a shift of "error" */
if yyChk[yystate] == yyErrCode {
goto yystack
}
}
/* the current p has no shift on "error", pop stack */
if yyDebug >= 2 {
__yyfmt__.Printf("error recovery pops state %d\n", yyS[yyp].yys)
}
yyp--
}
/* there is no state on the stack with an error shift ... abort */
goto ret1
case 3: /* no shift yet; clobber input char */
if yyDebug >= 2 {
__yyfmt__.Printf("error recovery discards %s\n", yyTokname(yytoken))
}
if yytoken == yyEofCode {
goto ret1
}
yyrcvr.char = -1
yytoken = -1
goto yynewstate /* try again in the same state */
}
}
/* reduction by production yyn */
if yyDebug >= 2 {
__yyfmt__.Printf("reduce %v in:\n\t%v\n", yyn, yyStatname(yystate))
}
yynt := yyn
yypt := yyp
_ = yypt // guard against "declared and not used"
yyp -= yyR2[yyn]
// yyp is now the index of $0. Perform the default action. Iff the
// reduced production is ε, $1 is possibly out of range.
if yyp+1 >= len(yyS) {
nyys := make([]yySymType, len(yyS)*2)
copy(nyys, yyS)
yyS = nyys
}
yyVAL = yyS[yyp+1]
/* consult goto table to find next state */
yyn = yyR1[yyn]
yyg := yyPgo[yyn]
yyj := yyg + yyS[yyp].yys + 1
if yyj >= yyLast {
yystate = yyAct[yyg]
} else {
yystate = yyAct[yyj]
if yyChk[yystate] != -yyn {
yystate = yyAct[yyg]
}
}
// dummy call; replaced with literal code
switch yynt {
case 1:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:65
{ // last rule; assign the evaluated time so we can use use it later
yylex.(*lexerWrapper).expression = yyDollar[1].expression
}
case 2:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:77
{
yyVAL.expression = newMathExpression(anchorDate(yyDollar[1].time), nil)
}
case 3:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:80
{
yyVAL.expression = newMathExpression(anchorDate(yyDollar[1].time), nil)
}
case 4:
yyDollar = yyS[yypt-3 : yypt+1]
//line datemath.y:83
{
yyVAL.expression = newMathExpression(anchorDate(yyDollar[1].time), yyDollar[3].timeAdjusters)
}
case 5:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:86
{
yyVAL.expression = newMathExpression(anchorDateNow, nil)
}
case 6:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:89
{
yyVAL.expression = newMathExpression(anchorDateNow, yyDollar[2].timeAdjusters)
}
case 7:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:103
{
yyVAL.time = yyDollar[1].time
}
case 8:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:107
{
yyVAL.time = yyDollar[1].time
}
case 9:
yyDollar = yyS[yypt-4 : yypt+1]
//line datemath.y:111
{
yyVAL.time = time.Date(yyDollar[1].time.Year(), yyDollar[1].time.Month(), yyDollar[1].time.Day(), yyDollar[3].time.Hour(), yyDollar[3].time.Minute(), yyDollar[3].time.Second(), yyDollar[3].time.Nanosecond(), yyDollar[4].location)
}
case 10:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:115
{
yyVAL.time = time.Unix(yyDollar[1].i64/1000, yyDollar[1].i64%1000*1000000)
}
case 11:
yyDollar = yyS[yypt-0 : yypt+1]
//line datemath.y:121
{
yyVAL.location = missingTimeZone
}
case 12:
yyDollar = yyS[yypt-6 : yypt+1]
//line datemath.y:125
{ /* support +/-09:00 style timezone specifiers */
yyVAL.location = time.FixedZone("$1$2$3:$5$6", yyDollar[1].i*(((yyDollar[2].i*10+yyDollar[3].i)*60*60)+((yyDollar[5].i*10+yyDollar[6].i)*60)))
}
case 13:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:129
{ /* Z */
yyVAL.location = time.UTC
}
case 14:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:135
{
yyVAL.time = time.Date(yyDollar[1].i, 1, 1, 0, 0, 0, 0, missingTimeZone)
}
case 15:
yyDollar = yyS[yypt-3 : yypt+1]
//line datemath.y:139
{
yyVAL.time = time.Date(yyDollar[1].i, yyDollar[3].month, 1, 0, 0, 0, 0, missingTimeZone)
}
case 16:
yyDollar = yyS[yypt-5 : yypt+1]
//line datemath.y:143
{
if yyDollar[5].i > daysIn(yyDollar[3].month, yyDollar[1].i) {
yylex.Error(fmt.Sprintf("day %d out of bounds for month %d", yyDollar[5].i, yyDollar[3].month))
}
yyVAL.time = time.Date(yyDollar[1].i, yyDollar[3].month, yyDollar[5].i, 0, 0, 0, 0, missingTimeZone)
}
case 17:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:153
{
yyVAL.time = time.Date(epoch.Year(), epoch.Month(), epoch.Day(), yyDollar[1].i, 0, 0, 0, missingTimeZone)
}
case 18:
yyDollar = yyS[yypt-3 : yypt+1]
//line datemath.y:157
{
yyVAL.time = time.Date(epoch.Year(), epoch.Month(), epoch.Day(), yyDollar[1].i, yyDollar[3].i, 0, 0, missingTimeZone)
}
case 19:
yyDollar = yyS[yypt-5 : yypt+1]
//line datemath.y:161
{
yyVAL.time = time.Date(epoch.Year(), epoch.Month(), epoch.Day(), yyDollar[1].i, yyDollar[3].i, yyDollar[5].i, 0, missingTimeZone)
}
case 20:
yyDollar = yyS[yypt-7 : yypt+1]
//line datemath.y:165
{
yyVAL.time = time.Date(epoch.Year(), epoch.Month(), epoch.Day(), yyDollar[1].i, yyDollar[3].i, yyDollar[5].i, yyDollar[7].i, missingTimeZone)
}
case 21:
yyDollar = yyS[yypt-4 : yypt+1]
//line datemath.y:171
{
yyVAL.i = digitsToInt(yyDollar[1].i, yyDollar[2].i, yyDollar[3].i, yyDollar[4].i)
}
case 22:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:177
{
yyVAL.month = time.Month(digitsToInt(yyDollar[1].i, yyDollar[2].i))
if yyVAL.month > 12 {
yylex.Error(fmt.Sprintf("month out of bounds %d", yyVAL.month))
}
}
case 23:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:186
{
// range validated in `date`
yyVAL.i = digitsToInt(yyDollar[1].i, yyDollar[2].i)
}
case 24:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:193
{
yyVAL.i = digitsToInt(yyDollar[1].i, yyDollar[2].i)
if yyVAL.i > 23 {
yylex.Error(fmt.Sprintf("hours out of bounds %d", yyVAL.i))
}
}
case 25:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:202
{
yyVAL.i = digitsToInt(yyDollar[1].i, yyDollar[2].i)
if yyVAL.i > 59 {
yylex.Error(fmt.Sprintf("minutes out of bounds %d", yyVAL.i))
}
}
case 26:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:211
{
yyVAL.i = digitsToInt(yyDollar[1].i, yyDollar[2].i)
if yyVAL.i > 59 {
yylex.Error(fmt.Sprintf("seconds out of bounds %d", yyVAL.i))
}
}
case 27:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:221
{
yyVAL.i = yyDollar[1].i * 100000000
}
case 28:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:225
{
yyVAL.i = digitsToInt(yyDollar[1].i, yyDollar[2].i) * 10000000
}
case 29:
yyDollar = yyS[yypt-3 : yypt+1]
//line datemath.y:229
{
yyVAL.i = digitsToInt(yyDollar[1].i, yyDollar[2].i, yyDollar[3].i) * 1000000
}
case 30:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:236
{
yyVAL.timeAdjusters = append([]timeAdjuster{yyDollar[1].timeAdjuster}, yyDollar[2].timeAdjusters...)
/*f, g := $1, $2 // bind to local scope*/
/*$$ = func(t time.Time) time.Time {*/
/*return g(f(t))*/
/*}*/
}
case 31:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:244
{
yyVAL.timeAdjusters = []timeAdjuster{yyDollar[1].timeAdjuster}
}
case 32:
yyDollar = yyS[yypt-3 : yypt+1]
//line datemath.y:250
{ /* add units; e.g. +15m */
yyVAL.timeAdjuster = addUnits(yyDollar[1].i*yyDollar[2].i, yyDollar[3].unit)
}
case 33:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:254
{ /* truncate to specified unit: e.g. /d */
yyVAL.timeAdjuster = truncateUnits(yyDollar[2].unit)
}
case 34:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:260
{
yyVAL.i = -1
}
case 35:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:264
{
yyVAL.i = 1
}
case 36:
yyDollar = yyS[yypt-0 : yypt+1]
//line datemath.y:270
{ /* default to 1 if no integer specified */
yyVAL.i = 1
}
case 37:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:274
{
yyVAL.i = yyDollar[1].i
}
case 38:
yyDollar = yyS[yypt-1 : yypt+1]
//line datemath.y:280
{
yyVAL.i = yyDollar[1].i
}
case 39:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:284
{
yyVAL.i = yyDollar[1].i*10 + yyDollar[2].i
}
case 40:
yyDollar = yyS[yypt-5 : yypt+1]
//line datemath.y:291
{
yyVAL.i64 = int64(digitsToInt(yyDollar[1].i, yyDollar[2].i, yyDollar[3].i, yyDollar[4].i, yyDollar[5].i))
}
case 41:
yyDollar = yyS[yypt-2 : yypt+1]
//line datemath.y:295
{
yyVAL.i64 = yyDollar[1].i64*10 + int64(yyDollar[2].i)
}
}
goto yystack /* stack new state and value */
}