Hi Jon,
> There is probably a simple answer to this (that I should know by now):
> Why do I get this when using ersatz . . ?
>
> : (name '{abc})
> !? (name '\{abc \})
> \{abc -- Can't rename
Yes, this is a bit funny. In fact, this is a kind of double error.
First, ErsatzLisp doesn't have external symbols. Still, the characters
'{' and '}' are handled as meta-characters by the reader (e.g. to be
compatible with normal PicoLisp). So this has the effect that {abc} is
read by the reader as *two* symbols:
{abc
and
}
As a result, 'name' receives a second argument (as can also be seen from
the error message above) and believes it has to rename '{abc' to NIL,
which is the value of '}'.
Second, because ErsatzLisp doesn't know about external symbols, '{abc'
is created as an *internal* symbols. And internal symbols are not
allowed to be renamed (only transients).
So we get the above error.
♪♫ Alex
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