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72 lines
2.7 KiB
Plaintext
72 lines
2.7 KiB
Plaintext
/* Copyright 2013 Prometheus Team
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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 rules
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import (
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"strconv"
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"strings"
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clientmodel "github.com/prometheus/client_golang/model"
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)
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%}
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D [0-9]
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L [a-zA-Z_:]
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U [smhdwy]
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%x S_COMMENTS
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%%
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. { yypos++; REJECT }
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\n { yyline++; yypos = 1; REJECT }
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"/*" { BEGIN(S_COMMENTS) }
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<S_COMMENTS>"*/" { BEGIN(0) }
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<S_COMMENTS>. { /* ignore chars within multi-line comments */ }
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\/\/[^\r\n]*\n { /* gobble up one-line comments */ }
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ALERT|alert { return ALERT }
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IF|if { return IF }
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FOR|for { return FOR }
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WITH|with { return WITH }
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PERMANENT|permanent { return PERMANENT }
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BY|by { return GROUP_OP }
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AVG|SUM|MAX|MIN|COUNT { yylval.str = yytext; return AGGR_OP }
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avg|sum|max|min|count { yylval.str = strings.ToUpper(yytext); return AGGR_OP }
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\<|>|AND|OR|and|or { yylval.str = strings.ToUpper(yytext); return CMP_OP }
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==|!=|>=|<= { yylval.str = yytext; return CMP_OP }
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[+\-] { yylval.str = yytext; return ADDITIVE_OP }
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[*/%] { yylval.str = yytext; return MULT_OP }
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{D}+{U} { yylval.str = yytext; return DURATION }
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{L}({L}|{D})* { yylval.str = yytext; return IDENTIFIER }
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\-?{D}+(\.{D}*)? { num, err := strconv.ParseFloat(yytext, 64);
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if (err != nil && err.(*strconv.NumError).Err == strconv.ErrSyntax) {
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panic("Invalid float")
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}
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yylval.num = clientmodel.SampleValue(num)
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return NUMBER }
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\"(\\.|[^\\"])*\" { yylval.str = yytext[1:len(yytext) - 1]; return STRING }
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\'(\\.|[^\\'])*\' { yylval.str = yytext[1:len(yytext) - 1]; return STRING }
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[{}\[\]()=,] { return int(yytext[0]) }
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. { /* don't print any remaining chars (whitespace) */ }
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\n { /* don't print any remaining chars (whitespace) */ }
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%%
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