Um, let's see if I can get this correctly, inasmuch as I've been known to be wrong. So as to have a de-cocker one must have a mechanism so as to facilitate such. Every pistol I've handled, including those manufactured by Smith & Wesson, integrate the "safety" lever and de-cocking mechanism. The 5946, absent of a safety lever, therefore has no de-cocker.
However, such is not to say the 5946 isn't "safe."
It is a double-action-only pistol, and as such requires an action by its user that causes the pistol's hammer to fully cycle with each shot. That is to say the sidearm must be "cocked" each time its user wishes to discharge a round. The 5946's user must "squeeze the trigger" before a round can be discharged.
Now, what about the "lack of a safety?"
The 5946, like any other modern DA-only (Double Action-only) weapon has a hammer which must have sufficient momentum so as to strike a firing pin that has two "safe" characteristics: the pin itself is shorter than its DA/SA (Double Action/Single Action) counterparts and is constrained by spring whose tension requires a greater, or heavier hammer fall which itself is actuated by a trigger pull rated at twice-to-three-times the typical SA/DA trigger-pull weight, e.g. 12 lb. to 4- or 5- lb. pull.
Secondly (and the reader thought we were done, huh?), the 5946's trigger is severely "bobbed" and, when resting, is seated in an ever-so-slightly recessed position as compared to the surrounding slide-frame's rear.
All of the above then combines to make the 5946 "safe."
Now, the primary reason this writer puts "safe" within quotation marks is because no firearm is ever really safe, or at least shouldn't be regarded as such because that's when people most often find themselves on the wrong side of an unintentional firearm discharge.
Enough said. Now, back to cleaning my firearm, which will be checked yet again for live ammunition.