Antlr4: pretty printing a Java code

[Artyom Aleksyuk]

Hello. I'm writing a proof-of-concept code transformation tool for Java, so I need to turn a parse tree back into the Java code. The result code shouldn't be character-precise compared to the input, as I understand, this is called "pretty printing".

I've tried to find any tools which are able to do this, but found only several Antlr3-era posts which tell that there's no such tool.

Maybe anyone have made such tool since this time? As I understand, it's a huge task and would require me to write several thousands lines of code.

Thanks, Artyom.

[Terence Parr]

it’s nontrivial for sure. getting original text is trivial, though, if that’s all you need.

T

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[Artyom Aleksyuk]

Thank you for the answer, Terence. Is it possible to get an original text which corresponds to a subtree?

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[Terence Parr]

hi. added a FAQ for you:

https://theantlrguy.atlassian.net/wiki/pages/viewpage.action?pageId=16809986

Ter