op=

[Ellery Newcomer]

according to the spec,

a op= b;

is semantically equivalent to

a = a op b;

but this doesn't seem to be strictly true. for example:

char c = 'a';
real r = 3.14;

c = c + r; // error

c += r;  // accepted; seems to be doing c += floor(r);

is this behavior intentional?