Rebol family of languages (including Red) uses near equivalents of fexprs. Here's a self-modifying function ;^) >> foo: has [x][append body-of context? 'x [

Rebol family of languages (including Red) uses near equivalents of fexprs. Here's a self-modifying function ;^) >> foo: has [x][append body-of context? 'x [+ 1] 1] == func [/local x][append body-of context? 'x [+ 1] 1] >> loop 3 [probe foo] 1 2 3 == 3 >> ?? foo foo: func [/local x][append body-of context? 'x [+ 1] 1 + 1 + 1 + 1]