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snf-parser

v0.0.6

Published

A parser for SNF (Simple Normal Form) grammar

Readme

SNF

一种用于定义 SQL 类语言的简洁语法标准,参考 BNF 而来。

关键字

定义流程,[]{}|.

基本单元

  • 内容块:小写字母开始仅包含小写数字下划线,到空格结束,内容用于替换
  • 定义块:大写字母开始仅包含大写数字下划线,到空格结束,内容直接输出
  • 可选块:以 [ 开头,以 ] 结尾,代表内容可选
  • 枚举块:以 { 开头,以 } 结尾,选项用 | 分隔,代表其内容替换为枚举的某一项
  • 重复块:...

限制

  • 内容块必须以小写开头
  • 可选块仅能包含枚举块
  • 枚举块中的每个枚举为一个基本单元

简写

  • 若可选块仅包含一个枚举块,那么枚举块的 {} 可不写,但内容解析后仍会包含