I have an example of nesting macros that makes me think I’m confused about how hygiene works. Here’s a minimal example: macro inner(e) println("In @inner") dump(e) @assert isa(e, Expr) && e.head == :$ esc(e.args[1]) end macro outer(e) println("In @outer") dump(e) quote…

You do need some escaping at each level, @outer2 and @outer3 are different ways you might think to do it. But @outer3 doesn’t work, because it passes @inner an expression which doesn’t have the $ nakedly visible. There is a helpful issue about this: https://github.com/JuliaLang/julia/issues/37691 . …

Nested macros and esc

General Usage

cstjean October 6, 2020, 2:40pm 16

We already had that conversation Looking for good macro examples - #9 by cstjean

Is it unclear?

1 Like

Topic		Replies	Views
Escaping of nested blocks General Usage	9	950	December 28, 2016
Macro hygiene in nested quote not working Performance question	11	1285	November 21, 2018
Call a macro within a macro General Usage	8	6179	March 17, 2020
Using variables from call space in macro return execution General Usage macros , scope	18	1722	January 27, 2018
Esc() in macro definitions in meta programming New to Julia	2	692	June 22, 2018

Nested macros and esc

Related topics