mirror of
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156 lines
3.7 KiB
Plaintext
156 lines
3.7 KiB
Plaintext
// Copyright 2019 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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%{
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package promql
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import (
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"github.com/prometheus/prometheus/pkg/labels"
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)
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%}
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%union {
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node Node
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item Item
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matchers []*labels.Matcher
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matcher *labels.Matcher
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}
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%token <item> ERROR
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%token <item> EOF
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%token <item> COMMENT
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%token <item> IDENTIFIER
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%token <item> METRIC_IDENTIFIER
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%token <item> LEFT_PAREN
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%token <item> RIGHT_PAREN
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%token <item> LEFT_BRACE
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%token <item> RIGHT_BRACE
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%token <item> LEFT_BRACKET
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%token <item> RIGHT_BRACKET
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%token <item> COMMA
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%token <item> ASSIGN
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%token <item> COLON
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%token <item> SEMICOLON
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%token <item> STRING
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%token <item> NUMBER
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%token <item> DURATION
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%token <item> BLANK
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%token <item> TIMES
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%token <item> SPACE
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%token operatorsStart
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// Operators.
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%token <item> SUB
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%token <item> ADD
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%token <item> MUL
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%token <item> MOD
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%token <item> DIV
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%token <item> LAND
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%token <item> LOR
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%token <item> LUNLESS
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%token <item> EQL
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%token <item> NEQ
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%token <item> LTE
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%token <item> LSS
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%token <item> GTE
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%token <item> GTR
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%token <item> EQL_REGEX
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%token <item> NEQ_REGEX
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%token <item> POW
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%token operatorsEnd
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%token aggregatorsStart
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// Aggregators.
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%token <item> AVG
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%token <item> COUNT
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%token <item> SUM
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%token <item> MIN
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%token <item> MAX
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%token <item> STDDEV
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%token <item> STDVAR
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%token <item> TOPK
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%token <item> BOTTOMK
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%token <item> COUNT_VALUES
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%token <item> QUANTILE
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%token aggregatorsEnd
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%token keywordsStart
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// Keywords.
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%token <item> OFFSET
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%token <item> BY
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%token <item> WITHOUT
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%token <item> ON
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%token <item> IGNORING
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%token <item> GROUP_LEFT
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%token <item> GROUP_RIGHT
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%token <item> BOOL
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%token keywordsEnd
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%token startSymbolsStart
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// Start symbols for the generated parser.
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%token START_LABELS
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%token startSymbolsEnd
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%type <matchers> label_matchers label_match_list
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%type <matcher> label_matcher
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%type <item> match_op
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%start start
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%%
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start : START_LABELS label_matchers
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{yylex.(*parser).generatedParserResult.(*VectorSelector).LabelMatchers = $2}
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| error
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{ yylex.(*parser).errorf("unknown syntax error after parsing %v", yylex.(*parser).token.desc()) }
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;
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label_match_list:
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label_match_list COMMA label_matcher
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{ $$ = append($1, $3)}
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| label_matcher
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{ $$ = []*labels.Matcher{$1}}
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;
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label_matchers :
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LEFT_BRACE label_match_list RIGHT_BRACE
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{ $$ = $2 }
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| LEFT_BRACE RIGHT_BRACE
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{ $$ = []*labels.Matcher{} }
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;
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label_matcher :
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IDENTIFIER match_op STRING
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{ $$ = yylex.(*parser).newLabelMatcher($1, $2, $3) }
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| IDENTIFIER match_op error
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{ yylex.(*parser).errorf("unexpected %v in label matching, expected string", yylex.(*parser).token.desc())}
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;
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match_op :
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EQL {$$ =$1}
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| NEQ {$$=$1}
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| EQL_REGEX {$$=$1}
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| NEQ_REGEX {$$=$1}
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| error
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{ yylex.(*parser).errorf("expected label matching operator but got %s", yylex.(*parser).token.Val) }
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;
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%%
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