var.opAssign

Assign from an arbitrary value rhs, setting the internal type and payload accordingly.

Shallow Copy Warning: When assigning from another var that contains an ARRAY or

OBJECT, this operation performs a shallow copy — the underlying container reference is aliased, not duplicated. This means:

var a = var([1, 2, 3]);
var b = a;          // b aliases a's array
b[0] = 99;          // modifies a[0] as well!
assert(a[0].as!int == 99);  // true — both see the change

To create an independent copy, use dup() or idup():

var a = var([1, 2, 3]);
var b = a.dup();    // b has its own copy
b[0] = 99;
assert(a[0].as!int == 1);   // a is unchanged

This shallow-copy behavior is intentional for performance (avoiding deep copies on every assignment), but users must be aware of the aliasing implications for container types.

Parameters

rhs	The value to assign.

Returns

A reference to this for chaining.