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71 lines
2.3 KiB
71 lines
2.3 KiB
%{ |
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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 |
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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>{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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<sLabels>{L}({L}|{D})* return tLName |
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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>{S}#{S}{C}*\n l.state = sInit; return tLinebreak |
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<sTimestamp>\n l.state = sInit; return tLinebreak |
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%% |
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return tInvalid |
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}
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