Timequest: toggle synchronizer constraints?

As a late follow-up. I played around with embedding SDC statements in HDL and found two solutions.

1. A simplified variant, assigning all toggle inputs to a single clock constraint

attribute altera_attribute : string;
attribute altera_attribute of rtl : architecture is 
  "-name SDC_STATEMENT ""set_false_path -from "";" &
  "-name SDC_STATEMENT ""create_clock -period 10 ] -name ce_sync""";

2. Embedding the complete SDC loop construct enumerating the clocks in a single SDC_STATEMENT line

attribute altera_attribute : string;
attribute altera_attribute of rtl : architecture is 
 "-name SDC_STATEMENT ""set_false_path -from "";" &
  "-name SDC_STATEMENT ""set regs ;" &
  "set n 0;foreach_in_collection reg $regs {;" &
  "set clk ];" &
  "create_clock -period 10 -name ce_sync_input${n} ;" &
  "set_clock_groups -exclusive -group ;incr n;}""";

Illustrating somehow Rysc's comment about the clunky way of embedding Timequest statements, but working though.

A possible drawback of embedded clock constraints, they are executed before the regular SDC files and may block other create_clock statements to a node.

Best wishes,

Frank