prometheus/rules/parser.y.go
Julius Volz 0712d738d1 Allow alternative "by"-clause position in grammar.
In addition to the existing by-clause syntax:

  sum(<expression>) by (<labels>) [keeping_extra]

...this allows the following new syntax:

  sum by (<labels>) [keeping_extra] (<expression>)

Both orderings may be used in a single expression. It is up to the users
to establish guidelines around their usage.

Change-Id: Iba10c9cc5fb6ac62edfcf246d281473e82467992
2014-11-25 17:09:04 +01:00

719 lines
15 KiB
Go

//line parser.y:15
package rules
import __yyfmt__ "fmt"
//line parser.y:15
import (
clientmodel "github.com/prometheus/client_golang/model"
"github.com/prometheus/prometheus/rules/ast"
"github.com/prometheus/prometheus/storage/metric"
)
//line parser.y:25
type yySymType struct {
yys int
num clientmodel.SampleValue
str string
ruleNode ast.Node
ruleNodeSlice []ast.Node
boolean bool
labelNameSlice clientmodel.LabelNames
labelSet clientmodel.LabelSet
labelMatcher *metric.LabelMatcher
labelMatchers metric.LabelMatchers
}
const START_RULES = 57346
const START_EXPRESSION = 57347
const IDENTIFIER = 57348
const STRING = 57349
const DURATION = 57350
const METRICNAME = 57351
const NUMBER = 57352
const PERMANENT = 57353
const GROUP_OP = 57354
const KEEPING_EXTRA = 57355
const AGGR_OP = 57356
const CMP_OP = 57357
const ADDITIVE_OP = 57358
const MULT_OP = 57359
const ALERT = 57360
const IF = 57361
const FOR = 57362
const WITH = 57363
const SUMMARY = 57364
const DESCRIPTION = 57365
var yyToknames = []string{
"START_RULES",
"START_EXPRESSION",
"IDENTIFIER",
"STRING",
"DURATION",
"METRICNAME",
"NUMBER",
"PERMANENT",
"GROUP_OP",
"KEEPING_EXTRA",
"AGGR_OP",
"CMP_OP",
"ADDITIVE_OP",
"MULT_OP",
"ALERT",
"IF",
"FOR",
"WITH",
"SUMMARY",
"DESCRIPTION",
" =",
}
var yyStatenames = []string{}
const yyEofCode = 1
const yyErrCode = 2
const yyMaxDepth = 200
//line parser.y:250
//line yacctab:1
var yyExca = []int{
-1, 1,
1, -1,
-2, 0,
-1, 4,
1, 1,
-2, 10,
}
const yyNprod = 50
const yyPrivate = 57344
var yyTokenNames []string
var yyStates []string
const yyLast = 137
var yyAct = []int{
56, 72, 50, 53, 30, 24, 6, 20, 49, 59,
22, 10, 51, 18, 13, 12, 21, 19, 20, 11,
18, 85, 36, 37, 38, 21, 19, 20, 81, 82,
8, 18, 52, 7, 48, 66, 21, 19, 20, 87,
18, 10, 51, 31, 13, 12, 60, 55, 28, 11,
65, 18, 21, 19, 20, 57, 21, 19, 20, 29,
8, 74, 23, 7, 62, 40, 39, 18, 73, 77,
76, 18, 80, 75, 10, 19, 20, 13, 12, 79,
86, 78, 11, 64, 89, 63, 41, 40, 71, 18,
46, 25, 93, 8, 44, 27, 7, 83, 69, 96,
94, 91, 58, 43, 9, 17, 54, 31, 92, 35,
33, 45, 16, 13, 97, 95, 90, 61, 73, 88,
32, 68, 25, 34, 2, 3, 14, 5, 4, 1,
42, 84, 15, 26, 70, 67, 47,
}
var yyPact = []int{
120, -1000, -1000, 68, 94, -1000, 41, 68, 116, 70,
20, 31, -1000, -1000, -1000, 104, 117, -1000, 101, 68,
68, 68, 37, 60, -1000, 79, -1000, 85, 5, 68,
93, 19, 30, -1000, 83, -22, -10, -17, 59, -1000,
116, -1000, 110, -1000, -1000, -1000, 38, 56, -1000, -1000,
41, -1000, 21, 7, -1000, 115, 74, 62, 68, -1000,
-1000, -1000, -1000, -1000, 35, 95, 68, 52, -1000, 68,
2, -1000, -1000, 73, 1, -1000, 93, 10, -1000, 113,
41, -1000, 112, 109, 80, 100, -1000, -1000, -1000, -1000,
-1000, 30, -1000, 78, 108, 76, 107, -1000,
}
var yyPgo = []int{
0, 136, 135, 4, 1, 134, 0, 5, 62, 133,
2, 8, 132, 3, 131, 104, 130, 129, 128, 127,
126,
}
var yyR1 = []int{
0, 17, 17, 18, 18, 19, 20, 20, 14, 14,
12, 12, 15, 15, 6, 6, 6, 5, 5, 4,
9, 9, 9, 8, 8, 7, 16, 16, 10, 10,
10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
13, 13, 3, 3, 2, 2, 1, 1, 11, 11,
}
var yyR2 = []int{
0, 2, 2, 0, 2, 1, 5, 11, 0, 2,
0, 1, 1, 1, 0, 3, 2, 1, 3, 3,
0, 2, 3, 1, 3, 3, 1, 1, 3, 3,
2, 4, 3, 4, 6, 6, 3, 3, 3, 1,
0, 1, 0, 4, 1, 3, 1, 3, 1, 1,
}
var yyChk = []int{
-1000, -17, 4, 5, -18, -19, -10, 28, 25, -15,
6, 14, 10, 9, -20, -12, 18, 11, 30, 16,
17, 15, -10, -8, -7, 6, -9, 25, 28, 28,
-3, 12, -15, 6, 6, 8, -10, -10, -10, 29,
27, 26, -16, 24, 15, 26, -8, -1, 29, -11,
-10, 7, -10, -13, 13, 28, -6, 25, 19, 31,
-7, 7, 26, 29, 27, 29, 28, -2, 6, 24,
-5, 26, -4, 6, -10, -11, -3, -10, 29, 27,
-10, 26, 27, 24, -14, 20, -13, 29, 6, -4,
7, 21, 8, -6, 22, 7, 23, 7,
}
var yyDef = []int{
0, -2, 3, 0, -2, 2, 5, 0, 0, 20,
13, 42, 39, 12, 4, 0, 0, 11, 0, 0,
0, 0, 0, 0, 23, 0, 30, 0, 0, 0,
40, 0, 14, 13, 0, 0, 36, 37, 38, 28,
0, 29, 0, 26, 27, 21, 0, 0, 32, 46,
48, 49, 0, 0, 41, 0, 0, 0, 0, 33,
24, 25, 22, 31, 0, 42, 0, 0, 44, 0,
0, 16, 17, 0, 8, 47, 40, 0, 43, 0,
6, 15, 0, 0, 0, 0, 34, 35, 45, 18,
19, 14, 9, 0, 0, 0, 0, 7,
}
var yyTok1 = []int{
1, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
28, 29, 3, 3, 27, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 24, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 30, 3, 31, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 25, 3, 26,
}
var yyTok2 = []int{
2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22, 23,
}
var yyTok3 = []int{
0,
}
//line yaccpar:1
/* parser for yacc output */
var yyDebug = 0
type yyLexer interface {
Lex(lval *yySymType) int
Error(s string)
}
const yyFlag = -1000
func yyTokname(c int) string {
// 4 is TOKSTART above
if c >= 4 && c-4 < len(yyToknames) {
if yyToknames[c-4] != "" {
return yyToknames[c-4]
}
}
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 yylex1(lex yyLexer, lval *yySymType) int {
c := 0
char := lex.Lex(lval)
if char <= 0 {
c = yyTok1[0]
goto out
}
if char < len(yyTok1) {
c = yyTok1[char]
goto out
}
if char >= yyPrivate {
if char < yyPrivate+len(yyTok2) {
c = yyTok2[char-yyPrivate]
goto out
}
}
for i := 0; i < len(yyTok3); i += 2 {
c = yyTok3[i+0]
if c == char {
c = yyTok3[i+1]
goto out
}
}
out:
if c == 0 {
c = yyTok2[1] /* unknown char */
}
if yyDebug >= 3 {
__yyfmt__.Printf("lex %s(%d)\n", yyTokname(c), uint(char))
}
return c
}
func yyParse(yylex yyLexer) int {
var yyn int
var yylval yySymType
var yyVAL yySymType
yyS := make([]yySymType, yyMaxDepth)
Nerrs := 0 /* number of errors */
Errflag := 0 /* error recovery flag */
yystate := 0
yychar := -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(yychar), 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 yychar < 0 {
yychar = yylex1(yylex, &yylval)
}
yyn += yychar
if yyn < 0 || yyn >= yyLast {
goto yydefault
}
yyn = yyAct[yyn]
if yyChk[yyn] == yychar { /* valid shift */
yychar = -1
yyVAL = yylval
yystate = yyn
if Errflag > 0 {
Errflag--
}
goto yystack
}
yydefault:
/* default state action */
yyn = yyDef[yystate]
if yyn == -2 {
if yychar < 0 {
yychar = yylex1(yylex, &yylval)
}
/* 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 == yychar {
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("syntax error")
Nerrs++
if yyDebug >= 1 {
__yyfmt__.Printf("%s", yyStatname(yystate))
__yyfmt__.Printf(" saw %s\n", yyTokname(yychar))
}
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(yychar))
}
if yychar == yyEofCode {
goto ret1
}
yychar = -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]
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 5:
//line parser.y:74
{
yylex.(*RulesLexer).parsedExpr = yyS[yypt-0].ruleNode
}
case 6:
//line parser.y:79
{
rule, err := CreateRecordingRule(yyS[yypt-3].str, yyS[yypt-2].labelSet, yyS[yypt-0].ruleNode, yyS[yypt-4].boolean)
if err != nil {
yylex.Error(err.Error())
return 1
}
yylex.(*RulesLexer).parsedRules = append(yylex.(*RulesLexer).parsedRules, rule)
}
case 7:
//line parser.y:85
{
rule, err := CreateAlertingRule(yyS[yypt-9].str, yyS[yypt-7].ruleNode, yyS[yypt-6].str, yyS[yypt-4].labelSet, yyS[yypt-2].str, yyS[yypt-0].str)
if err != nil {
yylex.Error(err.Error())
return 1
}
yylex.(*RulesLexer).parsedRules = append(yylex.(*RulesLexer).parsedRules, rule)
}
case 8:
//line parser.y:93
{
yyVAL.str = "0s"
}
case 9:
//line parser.y:95
{
yyVAL.str = yyS[yypt-0].str
}
case 10:
//line parser.y:99
{
yyVAL.boolean = false
}
case 11:
//line parser.y:101
{
yyVAL.boolean = true
}
case 12:
//line parser.y:105
{
yyVAL.str = yyS[yypt-0].str
}
case 13:
//line parser.y:107
{
yyVAL.str = yyS[yypt-0].str
}
case 14:
//line parser.y:111
{
yyVAL.labelSet = clientmodel.LabelSet{}
}
case 15:
//line parser.y:113
{
yyVAL.labelSet = yyS[yypt-1].labelSet
}
case 16:
//line parser.y:115
{
yyVAL.labelSet = clientmodel.LabelSet{}
}
case 17:
//line parser.y:118
{
yyVAL.labelSet = yyS[yypt-0].labelSet
}
case 18:
//line parser.y:120
{
for k, v := range yyS[yypt-0].labelSet {
yyVAL.labelSet[k] = v
}
}
case 19:
//line parser.y:124
{
yyVAL.labelSet = clientmodel.LabelSet{clientmodel.LabelName(yyS[yypt-2].str): clientmodel.LabelValue(yyS[yypt-0].str)}
}
case 20:
//line parser.y:128
{
yyVAL.labelMatchers = metric.LabelMatchers{}
}
case 21:
//line parser.y:130
{
yyVAL.labelMatchers = metric.LabelMatchers{}
}
case 22:
//line parser.y:132
{
yyVAL.labelMatchers = yyS[yypt-1].labelMatchers
}
case 23:
//line parser.y:136
{
yyVAL.labelMatchers = metric.LabelMatchers{yyS[yypt-0].labelMatcher}
}
case 24:
//line parser.y:138
{
yyVAL.labelMatchers = append(yyVAL.labelMatchers, yyS[yypt-0].labelMatcher)
}
case 25:
//line parser.y:142
{
var err error
yyVAL.labelMatcher, err = newLabelMatcher(yyS[yypt-1].str, clientmodel.LabelName(yyS[yypt-2].str), clientmodel.LabelValue(yyS[yypt-0].str))
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 26:
//line parser.y:150
{
yyVAL.str = "="
}
case 27:
//line parser.y:152
{
yyVAL.str = yyS[yypt-0].str
}
case 28:
//line parser.y:156
{
yyVAL.ruleNode = yyS[yypt-1].ruleNode
}
case 29:
//line parser.y:158
{
yyVAL.ruleNode = ast.NewVectorSelector(yyS[yypt-1].labelMatchers)
}
case 30:
//line parser.y:160
{
var err error
m, err := metric.NewLabelMatcher(metric.Equal, clientmodel.MetricNameLabel, clientmodel.LabelValue(yyS[yypt-1].str))
if err != nil {
yylex.Error(err.Error())
return 1
}
yyS[yypt-0].labelMatchers = append(yyS[yypt-0].labelMatchers, m)
yyVAL.ruleNode = ast.NewVectorSelector(yyS[yypt-0].labelMatchers)
}
case 31:
//line parser.y:168
{
var err error
yyVAL.ruleNode, err = NewFunctionCall(yyS[yypt-3].str, yyS[yypt-1].ruleNodeSlice)
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 32:
//line parser.y:174
{
var err error
yyVAL.ruleNode, err = NewFunctionCall(yyS[yypt-2].str, []ast.Node{})
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 33:
//line parser.y:180
{
var err error
yyVAL.ruleNode, err = NewMatrixSelector(yyS[yypt-3].ruleNode, yyS[yypt-1].str)
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 34:
//line parser.y:186
{
var err error
yyVAL.ruleNode, err = NewVectorAggregation(yyS[yypt-5].str, yyS[yypt-3].ruleNode, yyS[yypt-1].labelNameSlice, yyS[yypt-0].boolean)
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 35:
//line parser.y:192
{
var err error
yyVAL.ruleNode, err = NewVectorAggregation(yyS[yypt-5].str, yyS[yypt-1].ruleNode, yyS[yypt-4].labelNameSlice, yyS[yypt-3].boolean)
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 36:
//line parser.y:200
{
var err error
yyVAL.ruleNode, err = NewArithExpr(yyS[yypt-1].str, yyS[yypt-2].ruleNode, yyS[yypt-0].ruleNode)
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 37:
//line parser.y:206
{
var err error
yyVAL.ruleNode, err = NewArithExpr(yyS[yypt-1].str, yyS[yypt-2].ruleNode, yyS[yypt-0].ruleNode)
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 38:
//line parser.y:212
{
var err error
yyVAL.ruleNode, err = NewArithExpr(yyS[yypt-1].str, yyS[yypt-2].ruleNode, yyS[yypt-0].ruleNode)
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 39:
//line parser.y:218
{
yyVAL.ruleNode = ast.NewScalarLiteral(yyS[yypt-0].num)
}
case 40:
//line parser.y:222
{
yyVAL.boolean = false
}
case 41:
//line parser.y:224
{
yyVAL.boolean = true
}
case 42:
//line parser.y:228
{
yyVAL.labelNameSlice = clientmodel.LabelNames{}
}
case 43:
//line parser.y:230
{
yyVAL.labelNameSlice = yyS[yypt-1].labelNameSlice
}
case 44:
//line parser.y:234
{
yyVAL.labelNameSlice = clientmodel.LabelNames{clientmodel.LabelName(yyS[yypt-0].str)}
}
case 45:
//line parser.y:236
{
yyVAL.labelNameSlice = append(yyVAL.labelNameSlice, clientmodel.LabelName(yyS[yypt-0].str))
}
case 46:
//line parser.y:240
{
yyVAL.ruleNodeSlice = []ast.Node{yyS[yypt-0].ruleNode}
}
case 47:
//line parser.y:242
{
yyVAL.ruleNodeSlice = append(yyVAL.ruleNodeSlice, yyS[yypt-0].ruleNode)
}
case 48:
//line parser.y:246
{
yyVAL.ruleNode = yyS[yypt-0].ruleNode
}
case 49:
//line parser.y:248
{
yyVAL.ruleNode = ast.NewStringLiteral(yyS[yypt-0].str)
}
}
goto yystack /* stack new state and value */
}