Hamza d9adce038c AutoLISP: = compares the symbols type returns ...

`(= (type x) 'LIST)` is how an AutoLISP routine tests a type, because `type`
returns a symbol. `=` coerced both of its arguments to numbers, so the symbol
failed the coercion and the routine stopped at its first type test:

  _$ (= (type 1) 'INT)
  bad argument type: numberp: INT

`=` and `/=` now compare numbers and strings as before, and any other atom -- a
symbol, `nil`, an entity name, a selection set, a file handle -- by what it is,
the way `eq` does. Two consequences, both closer to AutoLISP than raising was:
a mismatch of kinds answers `nil` rather than failing, so `(= 1 "1")` and
`(= '(1) '(1))` answer (comparing list structure is `equal`'s job), and
`(= nil nil)` is `T`.

The ordering comparisons still take numbers and strings only, as AutoLISP has
them: `(< 'a 'b)` remains `bad argument type: numberp: A`.

Fix: #1597

2026-10-19 17:26:39 +05:00

..

src

AutoLISP: = compares the symbols type returns

2026-10-19 17:26:39 +05:00

tests

AREA: an ellipse's perimeter is its exact length, not a closed-form estimate (#1471)

2026-10-19 02:57:04 -04:00

Cargo.toml

Xrefs and data links: follow stored paths only on this computer or the drawing's share

2026-10-16 17:18:34 +00:00