prometheus/config/lexer.l
2013-02-07 11:49:04 +01:00

57 lines
2.1 KiB
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/* Copyright 2013 Prometheus Team
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http: *www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License. */
%{
package config
%}
D [0-9]
L [a-zA-Z_]
%s S_GLOBAL S_GLOBAL_LABELS S_JOB S_TARGETS S_TARGET_LABELS
%x S_COMMENTS
%%
. { yypos++; REJECT }
\n { yyline++; yypos = 1; REJECT }
"/*" { BEGIN(S_COMMENTS); }
<S_COMMENTS>"*/" { BEGIN(0) }
<S_COMMENTS>. { /* ignore chars within multi-line comments */ }
\/\/[^\r\n]*\n { /* gobble up one-line comments */ }
<0>global { BEGIN(S_GLOBAL); return GLOBAL }
<S_GLOBAL>labels { BEGIN(S_GLOBAL_LABELS); return LABELS }
<S_GLOBAL>rule_files { return RULE_FILES }
<S_GLOBAL_LABELS>"}" { BEGIN(S_GLOBAL); REJECT }
<S_GLOBAL>"}" { BEGIN(0); REJECT }
<0>job { BEGIN(S_JOB); return JOB }
<S_JOB>targets { BEGIN(S_TARGETS); return TARGETS }
<S_TARGETS>endpoints { return ENDPOINTS }
<S_TARGETS>labels { BEGIN(S_TARGET_LABELS); return LABELS }
<S_TARGET_LABELS>"}" { BEGIN(S_TARGETS); REJECT }
<S_TARGETS>"}" { BEGIN(S_JOB); REJECT }
<S_JOB>"}" { BEGIN(0); REJECT }
{L}({L}|{D})+ { yylval.str = yytext; return IDENTIFIER }
\"(\\.|[^\\"])*\" { yylval.str = yytext[1:len(yytext) - 1]; return STRING }
\'(\\.|[^\\'])*\' { yylval.str = yytext[1:len(yytext) - 1]; return STRING }
[{}\[\]()=,] { return int(yytext[0]) }
. { /* don't print any remaining chars (whitespace) */ }
\n { /* don't print any remaining chars (whitespace) */ }
%%