Revice is a high-level regex transpiler library for readability and reusability.

Current Progress

Proposal Stage. Any feedback is appreciated on the Issues page with the tag feedback.

Examples

Supports Permutations

(?perm(,):apple,pear,blueberry)

transpiles to

ap{2}le,(?:pear,blueber{2}y|blueber{2}y,pear)|pear(?:ap{2}le,blueber{2}y|blueber{2}y,ap{2}le)|blueber{2}y(?:ap{2}le,pear|pear,ap{2}le)

base64

\#base64#*

transpiles to

(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}(?:==|[A-Za-z0-9+/]=))?

---

\#base64#+

transpiles to

(?:[A-Za-z0-9+/]{4})*?:[A-Za-z0-9+/]{2}(?:==|[A-Za-z0-9+/](?:=|[A-Za-z0-9+/])))?

---

\#base64#{1,2}

transpiles to

(?:[A-Za-z0-9+/]{4}){0,1}(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})

---

\#b64-char#

transpiles to

[A-Za-z0-9+/]

if-behind far-else

(if-behind<tag>(cond):xxx)[a-z]+(else<tag>:xxx)

transpiles to

(?:(?!cond)xxx[a-z]+|[a-z]+xxx)

Features

• "Batteries-included" (in a yaml file)
  • modifiers e.g. permutation modifier (?perm(<delimiter>):, case-insensitive flag (not in JS), S flag (not in JS),
  • classes e.g. #b64#, #b64-char#, #hex#, #oct#, #bound# = (?:_|\b)
  • syntactic sugars e.g. `(?ahead:), (?behind:), (?ahead-neg:), (?behind-neg:)
• Supports Custom YAML file
  • building your own classes and modifiers for reuse
  • (optional) create your own exportable regex expressions with automated test cases testing, that can also use your own custom classes and modifiers within
  • Choose to import or not "batteries-included" yaml file
  • Choose to import only certain "batteries-included" variables
• Supports command line transpiler

Architecture

Modules:

• Argparser for CLI transpiler
• Transpiler
  • transpiles the Customs
  • gets parsed file
  • Tokenizer
    • tokenize based on file
  • Parser
    • parse based on file
  • Error handling
    • handling wrong regexes
      • error message should be based on built expression
• Code Generator
  • generates Variables, have to make use of the Customs
  • ability to add custom prefix (no prefix added if none specified)
  • generates in target language (rust and js first)
    • generates in /generated with the yaml file copied and the revice-gen.rs
• File Reader
  • check correct yaml file
  • convert to json

YAML file:

• Customs
• Variables