prometheus/rules/parser.y.go

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//line parser.y:15
package rules
import __yyfmt__ "fmt"
//line parser.y:15
import clientmodel "github.com/prometheus/client_golang/model"
import "github.com/prometheus/prometheus/rules/ast"
//line parser.y:21
type yySymType struct {
yys int
num clientmodel.SampleValue
str string
ruleNode ast.Node
ruleNodeSlice []ast.Node
boolean bool
labelNameSlice clientmodel.LabelNames
labelSet clientmodel.LabelSet
}
const START_RULES = 57346
const START_EXPRESSION = 57347
const IDENTIFIER = 57348
const STRING = 57349
const DURATION = 57350
const NUMBER = 57351
const PERMANENT = 57352
const GROUP_OP = 57353
const AGGR_OP = 57354
const CMP_OP = 57355
const ADDITIVE_OP = 57356
const MULT_OP = 57357
const ALERT = 57358
const IF = 57359
const FOR = 57360
const WITH = 57361
var yyToknames = []string{
"START_RULES",
"START_EXPRESSION",
"IDENTIFIER",
"STRING",
"DURATION",
"NUMBER",
"PERMANENT",
"GROUP_OP",
"AGGR_OP",
"CMP_OP",
"ADDITIVE_OP",
"MULT_OP",
"ALERT",
"IF",
"FOR",
"WITH",
" =",
}
var yyStatenames = []string{}
const yyEofCode = 1
const yyErrCode = 2
const yyMaxDepth = 200
//line parser.y:188
//line yacctab:1
var yyExca = []int{
-1, 1,
1, -1,
-2, 0,
-1, 4,
6, 10,
-2, 1,
}
const yyNprod = 36
const yyPrivate = 57344
var yyTokenNames []string
var yyStates []string
const yyLast = 97
var yyAct = []int{
20, 38, 34, 17, 33, 43, 6, 67, 15, 66,
19, 18, 16, 17, 15, 45, 59, 44, 60, 27,
28, 29, 16, 17, 15, 41, 40, 18, 16, 17,
18, 16, 17, 22, 15, 23, 21, 46, 47, 49,
15, 8, 35, 15, 10, 51, 22, 9, 50, 53,
52, 48, 61, 57, 18, 16, 17, 39, 8, 7,
32, 10, 65, 42, 9, 56, 30, 15, 8, 35,
54, 10, 62, 37, 9, 14, 7, 26, 68, 64,
39, 13, 25, 24, 2, 3, 7, 11, 5, 4,
1, 58, 12, 36, 55, 63, 31,
}
var yyPact = []int{
80, -1000, -1000, 52, 65, -1000, 17, 52, 12, 11,
-1000, -1000, 77, 76, -1000, 69, 52, 52, 52, 41,
-1000, 35, 51, 52, 25, 46, -22, -12, -18, 8,
-1000, -8, -1000, -1000, 17, -1000, 15, -1000, -1000, 31,
14, 28, 52, -1000, -1000, 62, -1000, 74, 63, 54,
52, -2, -1000, -1000, -1000, -1000, -6, 17, 33, 64,
73, 25, -1000, -16, -1000, -1000, -1000, 72, -1000,
}
var yyPgo = []int{
0, 96, 95, 94, 1, 93, 0, 2, 4, 92,
91, 90, 89, 88, 87,
}
var yyR1 = []int{
0, 11, 11, 12, 12, 13, 14, 14, 10, 10,
9, 9, 6, 6, 6, 5, 5, 4, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 3, 3,
2, 2, 1, 1, 8, 8,
}
var yyR2 = []int{
0, 2, 2, 0, 2, 1, 5, 7, 0, 2,
0, 1, 0, 3, 2, 1, 3, 3, 3, 2,
4, 3, 4, 5, 3, 3, 3, 1, 0, 4,
1, 3, 1, 3, 1, 1,
}
var yyChk = []int{
-1000, -11, 4, 5, -12, -13, -7, 24, 6, 12,
9, -14, -9, 16, 10, 26, 14, 15, 13, -7,
-6, 24, 21, 24, 6, 6, 8, -7, -7, -7,
25, -1, 25, -8, -7, 7, -5, 22, -4, 6,
-7, -6, 17, 27, 25, 23, 22, 23, 20, 25,
20, -7, -8, -4, 7, -3, 11, -7, -10, 18,
24, 19, 8, -2, 6, -6, 25, 23, 6,
}
var yyDef = []int{
0, -2, 3, 0, -2, 2, 5, 0, 12, 0,
27, 4, 0, 0, 11, 0, 0, 0, 0, 0,
19, 0, 0, 0, 12, 0, 0, 24, 25, 26,
18, 0, 21, 32, 34, 35, 0, 14, 15, 0,
0, 0, 0, 22, 20, 0, 13, 0, 0, 28,
0, 8, 33, 16, 17, 23, 0, 6, 0, 0,
0, 12, 9, 0, 30, 7, 29, 0, 31,
}
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,
24, 25, 3, 3, 23, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 20, 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, 26, 3, 27, 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, 21, 3, 22,
}
var yyTok2 = []int{
2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12, 13, 14, 15, 16, 17, 18, 19,
}
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 %U %s\n", uint(char), yyTokname(c))
}
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:66
{
yylex.(*RulesLexer).parsedExpr = yyS[yypt-0].ruleNode
}
case 6:
//line parser.y:70
{
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:76
{
rule, err := CreateAlertingRule(yyS[yypt-5].str, yyS[yypt-3].ruleNode, yyS[yypt-2].str, yyS[yypt-0].labelSet)
if err != nil {
yylex.Error(err.Error())
return 1
}
yylex.(*RulesLexer).parsedRules = append(yylex.(*RulesLexer).parsedRules, rule)
}
case 8:
//line parser.y:84
{
yyVAL.str = "0s"
}
case 9:
//line parser.y:86
{
yyVAL.str = yyS[yypt-0].str
}
case 10:
//line parser.y:90
{
yyVAL.boolean = false
}
case 11:
//line parser.y:92
{
yyVAL.boolean = true
}
case 12:
//line parser.y:96
{
yyVAL.labelSet = clientmodel.LabelSet{}
}
case 13:
//line parser.y:98
{
yyVAL.labelSet = yyS[yypt-1].labelSet
}
case 14:
//line parser.y:100
{
yyVAL.labelSet = clientmodel.LabelSet{}
}
case 15:
//line parser.y:103
{
yyVAL.labelSet = yyS[yypt-0].labelSet
}
case 16:
//line parser.y:105
{
for k, v := range yyS[yypt-0].labelSet {
yyVAL.labelSet[k] = v
}
}
case 17:
//line parser.y:109
{
yyVAL.labelSet = clientmodel.LabelSet{clientmodel.LabelName(yyS[yypt-2].str): clientmodel.LabelValue(yyS[yypt-0].str)}
}
case 18:
//line parser.y:114
{
yyVAL.ruleNode = yyS[yypt-1].ruleNode
}
case 19:
//line parser.y:116
{
yyS[yypt-0].labelSet[clientmodel.MetricNameLabel] = clientmodel.LabelValue(yyS[yypt-1].str)
yyVAL.ruleNode = ast.NewVectorLiteral(yyS[yypt-0].labelSet)
}
case 20:
//line parser.y:118
{
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 21:
//line parser.y:124
{
var err error
yyVAL.ruleNode, err = NewFunctionCall(yyS[yypt-2].str, []ast.Node{})
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 22:
//line parser.y:130
{
var err error
yyVAL.ruleNode, err = NewMatrix(yyS[yypt-3].ruleNode, yyS[yypt-1].str)
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 23:
//line parser.y:136
{
var err error
yyVAL.ruleNode, err = NewVectorAggregation(yyS[yypt-4].str, yyS[yypt-2].ruleNode, yyS[yypt-0].labelNameSlice)
if err != nil {
yylex.Error(err.Error())
return 1
}
}
case 24:
//line parser.y:144
{
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 25:
//line parser.y:150
{
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 26:
//line parser.y:156
{
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 27:
//line parser.y:162
{
yyVAL.ruleNode = ast.NewScalarLiteral(yyS[yypt-0].num)
}
case 28:
//line parser.y:166
{
yyVAL.labelNameSlice = clientmodel.LabelNames{}
}
case 29:
//line parser.y:168
{
yyVAL.labelNameSlice = yyS[yypt-1].labelNameSlice
}
case 30:
//line parser.y:172
{
yyVAL.labelNameSlice = clientmodel.LabelNames{clientmodel.LabelName(yyS[yypt-0].str)}
}
case 31:
//line parser.y:174
{
yyVAL.labelNameSlice = append(yyVAL.labelNameSlice, clientmodel.LabelName(yyS[yypt-0].str))
}
case 32:
//line parser.y:178
{
yyVAL.ruleNodeSlice = []ast.Node{yyS[yypt-0].ruleNode}
}
case 33:
//line parser.y:180
{
yyVAL.ruleNodeSlice = append(yyVAL.ruleNodeSlice, yyS[yypt-0].ruleNode)
}
case 34:
//line parser.y:184
{
yyVAL.ruleNode = yyS[yypt-0].ruleNode
}
case 35:
//line parser.y:186
{
yyVAL.ruleNode = ast.NewStringLiteral(yyS[yypt-0].str)
}
}
goto yystack /* stack new state and value */
}