Standard way to construct `RewriteRule`s at run-time?

[THinnerichs]

Hey,

I really like the Julia macro solution for constructing rules with @rule in Metatheory. Now, I would like to construct RewriteRules at run-time.

However, the expanded macro (Base.remove_linenums! for better readability)

 Base.remove_linenums!(@macroexpand @rule :a --> 1)

is pretty verbose.

What would be the standard way to construct a RewriteRule at run-time, then? Preferably, I would like to have something like

a = :a
b =1
r = RewriteRule(a, -->, b)