flying-hero
96f6318101
新增: - backend/venv/ - Python 虚拟环境 - backend/start.sh - 启动脚本（使用虚拟环境） - backend/requirements.txt - 依赖列表 - .gitignore - 忽略虚拟环境和缓存文件 说明: - 每个项目使用独立虚拟环境 - 避免依赖冲突 - 启动脚本自动创建和激活虚拟环境
17 lines
619 B
BNF
17 lines
619 B
BNF
range-set ::= range ( logical-or range ) *
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logical-or ::= ( ' ' ) * '||' ( ' ' ) *
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range ::= hyphen | simple ( ' ' simple ) * | ''
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hyphen ::= partial ' - ' partial
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simple ::= primitive | partial | tilde | caret
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primitive ::= ( '<' | '>' | '>=' | '<=' | '=' ) partial
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partial ::= xr ( '.' xr ( '.' xr qualifier ? )? )?
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xr ::= 'x' | 'X' | '*' | nr
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nr ::= '0' | [1-9] ( [0-9] ) *
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tilde ::= '~' partial
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caret ::= '^' partial
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qualifier ::= ( '-' pre )? ( '+' build )?
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pre ::= parts
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build ::= parts
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parts ::= part ( '.' part ) *
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part ::= nr | [-0-9A-Za-z]+
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