Struct copy semantics

[FeepingCreature]

Discussed in https://github.com/Neat-Lang/neat/discussions/22

^{Originally posted by **ntrel** January 2, 2023} Hi, I'm trying to understand the following: ```d module dtor; import std.stdio; struct S { int i; this(S){print("copy");} ~this(){print("dtor");} } void f(S s) {"f: $(s.i)".print;} void main() { mut S s; { S t = s; // copy s.i++; "$(s.i), $(t.i)".print; // dtor } "call:".print; s.f; // doesn't call copy or dtor "end".print; } ``` Why does calling `f` avoid calling the copy constructor and destructor, but `t` doesn't?

[FeepingCreature]

Fixed on master: https://github.com/Neat-Lang/neat/commit/7527d82c319010fa120120b6fac9605a9a295365