Cyril, something like this: | env rewriter result methods changes | env := RBBrowserEnvironment default forPackages: (RPackageOrganizer default packages ). rewriter := RBParseTreeRewriter new. rewriter replace:'`@receiver detect: `@arg1 ifFound: [ :`arg2 | `arg2 ] ifNone: `@arg3' with: '`@receiver detect: `@arg1 ifNone: `@arg3'. changes := Array with: (RBSmalllintChecker runRule: (RBTransformationRule new rewriteRule: rewriter; yourself) onEnvironment: env ) builder. (ChangesBrowser changes: changes) open. On Thu, May 7, 2020 at 8:22 PM Cyril Ferlicot D. <cyril.ferlicot@gmail.com> wrote:

Hi,

I was wondering if it was possible with the parse tree rewriter to match a block parameter?

I would like to be able, for example, to rewrite:

`#() detect: #odd ifFound: [ :e | e ] ifNone: [ self toto ]`

as

`#() detect: #odd ifNone: [ self toto ]`

But I don't know how to express this rule with the rewrite rules of Pharo.

I tried multiple things such as:

'`@receiver detect: `@arg1 ifFound: [ `@arg2 | `@arg2 ] ifNone: `@arg3 ' -> '`@receiver detect: `@arg1 ifNone: `@arg3'

or

'`@receiver detect: `@arg1 ifFound: [ :`@arg2 | `@arg2 ] ifNone: `@arg3 ' -> '`@receiver detect: `@arg1 ifNone: `@arg3'

Without sucess.

Is there a way to do that or is it a limitation of the rewrite syntax?

-- Cyril Ferlicot https://ferlicot.fr