Yes. There is nice help presenter in the Pharo: StRewriterHelpBrowserPresenter new open [image: Screenshot 2026-02-03 at 10.15.45.png] вт, 3 февр. 2026 г. в 01:36, Richard O'Keefe <raoknz@gmail.com>:

Is the "classic" rewriting syntax documented anywhere?

On Mon, 2 Feb 2026 at 22:52, Denis Kudriashov via Pharo-users < pharo-users@lists.pharo.org> wrote:

...

Hi all.

This is the release of *BPatterns* project, one of my old ideas on how to make the rewrite engine usable for scripting.

As a quick reminder, here is an example of the classic rewrite-engine matching syntax:

*``@receiver isNil ifTrue: ``@nilBlock*

In practice, patterns like this usually live inside string literals—hidden away in lint rules, deprecations, or refactorings. To use them for *manual* code search or rewriting, you typically need a dedicated tool.

Now compare that with the same pattern expressed as a *BPattern*:

*[ any isNil ifTrue: anyBlock ] bpattern*

No special syntax. No magical tools. Just pure Smalltalk.

You write a block. You send #bpattern. You’re done.

Every editor understands it. Every tool respects it.

Want to see where this pattern appears?

* [ any isNil ifTrue: anyBlock ] bpattern browseUsers*

[image: Screenshot 2026-01-31 at 12.16.19.png]

Want to rewrite all of them?

*[[ any isNil ifTrue: anyBlock ] -> [ any ifNil: anyBlock ]] brewrite preview*

[image: Screenshot 2026-01-31 at 12.17.57.png]

Because *BPatterns are real Smalltalk code*, all development tools work out of the box: syntax highlighting, completion, navigation, refactorings.

This is the rewrite engine treated as a *first-class citizen*.

Not strings. Not tooling sidecars. Not just for advanced users.

*A rewrite engine you can actually use.* * A rewrite engine at your fingertips.* More details are in the blog post:

- https://dionisiydk.blogspot.com/2026/02/bpatterns-rewrite-engine-with-smallt...

And follow the project on GitHub:

- https://github.com/dionisiydk/BPatterns

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