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47 lines
1.6 KiB
Plaintext
47 lines
1.6 KiB
Plaintext
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%{
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package rules
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import (
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"github.com/matttproud/prometheus/model"
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"strconv"
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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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%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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permanent { return PERMANENT }
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BY { return GROUP_OP }
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AVG|SUM|MAX|MIN { yylval.str = yytext; return AGGR_OP }
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\<|>|AND|OR { yylval.str = 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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{L}({L}|{D})+ { yylval.str = yytext; return IDENTIFIER }
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\-?{D}+(\.{D}*)? { num, err := strconv.ParseFloat(yytext, 32);
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if (err != nil) { rulesError("Invalid float %v", yytext) }
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yylval.num = model.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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