mirror of
https://github.com/prometheus/prometheus
synced 2024-12-30 19:03:03 +00:00
a28d7865ad
This adds support for the new grammar of `{"metric_name", "l1"="val"}` to promql and some of the exposition formats.
This grammar will also be valid for non-UTF-8 names.
UTF-8 names will not be considered valid unless model.NameValidationScheme is changed.
This does not update the go expfmt parser in text_parse.go, which will be addressed by https://github.com/prometheus/common/issues/554/.
Part of https://github.com/prometheus/prometheus/issues/13095
Signed-off-by: Owen Williams <owen.williams@grafana.com>
84 lines
3.1 KiB
Plaintext
84 lines
3.1 KiB
Plaintext
%{
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// Copyright 2018 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package textparse
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import (
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"fmt"
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)
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// Lex is called by the parser generated by "go tool yacc" to obtain each
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// token. The method is opened before the matching rules block and closed at
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// the end of the file.
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func (l *openMetricsLexer) Lex() token {
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if l.i >= len(l.b) {
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return tEOF
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}
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c := l.b[l.i]
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l.start = l.i
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%}
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D [0-9]
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L [a-zA-Z_]
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M [a-zA-Z_:]
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C [^\n]
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S [ ]
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%x sComment sMeta1 sMeta2 sLabels sLValue sValue sTimestamp sExemplar sEValue sETimestamp
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%yyc c
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%yyn c = l.next()
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%yyt l.state
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%%
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#{S} l.state = sComment
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<sComment>HELP{S} l.state = sMeta1; return tHelp
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<sComment>TYPE{S} l.state = sMeta1; return tType
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<sComment>UNIT{S} l.state = sMeta1; return tUnit
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<sComment>"EOF"\n? l.state = sInit; return tEOFWord
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<sMeta1>\"(\\.|[^\\"])*\" l.state = sMeta2; return tMName
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<sMeta1>{M}({M}|{D})* l.state = sMeta2; return tMName
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<sMeta2>{S}{C}*\n l.state = sInit; return tText
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{M}({M}|{D})* l.state = sValue; return tMName
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<sValue>\{ l.state = sLabels; return tBraceOpen
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\{ l.state = sLabels; return tBraceOpen
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<sLabels>{L}({L}|{D})* return tLName
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<sLabels>\"(\\.|[^\\"])*\" l.state = sLabels; return tQString
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<sLabels>\} l.state = sValue; return tBraceClose
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<sLabels>= l.state = sLValue; return tEqual
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<sLabels>, return tComma
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<sLValue>\"(\\.|[^\\"\n])*\" l.state = sLabels; return tLValue
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<sValue>{S}[^ \n]+ l.state = sTimestamp; return tValue
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<sTimestamp>{S}[^ \n]+ return tTimestamp
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<sTimestamp>\n l.state = sInit; return tLinebreak
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<sTimestamp>{S}#{S}\{ l.state = sExemplar; return tComment
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<sExemplar>{L}({L}|{D})* return tLName
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<sExemplar>\} l.state = sEValue; return tBraceClose
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<sExemplar>= l.state = sEValue; return tEqual
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<sEValue>\"(\\.|[^\\"\n])*\" l.state = sExemplar; return tLValue
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<sExemplar>, return tComma
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<sEValue>{S}[^ \n]+ l.state = sETimestamp; return tValue
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<sETimestamp>{S}[^ \n]+ return tTimestamp
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<sETimestamp>\n l.state = sInit; return tLinebreak
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%%
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return tInvalid
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}
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