Missing substitution in parameter body

[Emoun]

Situation:

When using parameterized substitution, if a substitution variable is used inside the argument to a substitution, it is not substituted.

Example:

#[duplicate::duplicate(
  refs(type)	fn_name;
  [&type] 	[fn_const];
  [&mut type]	[fn_mut];
)]
fn fn_name(arg: refs([refs([i32])])){}

Expected Behavior:

fn fn_const(arg: &&i32){}
fn fn_mut(arg: &mut &mut i32){}

Actual Behavior:

fn fn_const(arg: &refs([i32])){}
fn fn_mut(arg: &mut refs([i32])){}

Reproduction:

Affected Versions:

0.2.9 and below

Local Environment:

Miscellaneous:

[Emoun]

Fixed to be released in next version.