= Raku tuple type annotation
:categories: raku programming-languages

[source,raku]
----
# Single Str return value: this works
sub f1(Str $in --> Str) {
  $in;
}

# Tuple of Str as return value: this works
sub f2(Str $in) {
  ($in, $in);
}

# Tuple of Str as return value with type annotation: this doesn't works
sub f2(Str $in --> (Str, Str)) {
  ($in, $in);
}
----

Error log is:

[source,raku]
----
===SORRY!=== Error while compiling /path/to/my/file
Malformed return value
----
