铁路图把语法规则画成轨道，合法的输入从起点沿轨道走到终点。复制 Markdown查看 Markdown主题KohuKohu DarkDefault铁路图目前是 Beta，用 -beta 声明，因为 Mermaid 可能还会修改它。A JSON number复制源码在 Playground 中打开JSON numbernumber-integerfractionexponentinteger0oneninedigitfraction.digitdigitexponenteE+-digitdigitoneninea digit from 1 to 9? ?digit0onenineJSON numbernumber-integerfractionexponentinteger0oneninedigitfraction.digitdigitexponenteE+-digitdigitoneninea digit from 1 to 9? ?digit0onenineA small expression grammar复制源码在 Playground 中打开Arithmetic with callsexprterm+-termtermfactor*/%factorfactor-numbercallname(expr)callname(expr,expr)Arithmetic with callsexprterm+-termtermfactor*/%factorfactor-numbercallname(expr)callname(expr,expr)Arithmetic with callsexprterm+-termtermfactor*/%factorfactor-numbercallname(expr)callname(expr,expr)A semantic version in ABNF复制源码在 Playground 中打开Semantic versionversioncore-pre-release+buildcorenumber.number.numberpre-releaseidentifier.identifierbuildidentifier.identifiernumber0%x31-39DIGITidentifierALPHADIGIT-Semantic versionversioncore-pre-release+buildcorenumber.number.numberpre-releaseidentifier.identifierbuildidentifier.identifiernumber0%x31-39DIGITidentifierALPHADIGIT-An INI file line in PEG复制源码在 Playground 中打开INI file lineLineSectionCommentPairSection[Name]Comment;!EndOfLine? ?.? ?PairName=ValueNameLetterLetterDigit_Value!EndOfLine? ?.? ?INI file lineLineSectionCommentPairSection[Name]Comment;!EndOfLine? ?.? ?PairName=ValueNameLetterLetterDigit_Value!EndOfLine? ?.? ?A Go duration, written as calls复制源码在 Playground 中打开Go durationduration+-amountunitamountdigit? ?.digit? ?unithmsmsusnsGo durationduration+-amountunitamountdigit? ?.digit? ?unithmsmsusns上一个雷达图下一个泳道图