The stuff here sure looks like quasiquoting to me:
https://wiki.tcl-lang.org/page/Macro+Facility+for+Tcl
mac mloop {idx cnt cmd} { return "for {set $idx 0} {\$[set $idx] < $cnt} {incr $idx} {$cmd}" }
The stuff here sure looks like quasiquoting to me:
https://wiki.tcl-lang.org/page/Macro+Facility+for+Tcl
The "..." with embedded $... reference is is a kind of quasiquote.