|Applesoft tokenization phases? email@example.com (Ev. Drikos) (2020-03-12)|
|Re: Applesoft tokenization phases? firstname.lastname@example.org (George Neuner) (2020-03-13)|
|Re: Applesoft tokenization phases? email@example.com (awanderin) (2020-03-16)|
|Re: Applesoft tokenization phases? firstname.lastname@example.org (Ev. Drikos) (2020-03-18)|
|Re: Applesoft tokenization phases? email@example.com (Christopher F Clark) (2020-03-20)|
|Re: Applesoft tokenization phases? firstname.lastname@example.org (Martin Ward) (2020-03-21)|
|Date:||Mon, 16 Mar 2020 00:07:19 -0600|
|Organization:||A noiseless patient Spider|
|Injection-Info:||gal.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="56247"; mail-complaints-to="email@example.com"|
|Posted-Date:||16 Mar 2020 20:51:08 EDT|
"Ev. Drikos" <firstname.lastname@example.org> writes:
> This question relates to thread "Languages with Optional Spaces".
> In an Applesoft II manual I've found at "classiccmp.org" , page 7,
> we read that in a variable name any alphanumeric characters after the
> first two are ignored, unless they contain a reserved world. FEND ie
> would be illegal as it contains END.
> To implement such a rule one could first recognize keywords and then
> recognize any names. We see in p123 that stmt I is tokenized as II:
> I. stmt: 100 FOR A = LOFT OR CAT To 15
> II. tokens: 100 FOR A = LOF TO RC AT To 15
> Yet, I've found ie a program at "hoist-point.com"  that contains:
> 110 DIFF = ABS(A(I)-N)
If you type that into Applesoft BASIC, it parses it as:
110 D IF F = ABS (A(I) - N)
The spaces are how Applesoft lists it (it puts spaces around each token;
variables are not parsed as tokens at entry time, they are only parsed
> Also, an online AppleSoft simulator at calormen.com  accepts ie both
> DIFF and FEND as valid variable names.
It is doing things differently than actual Applesoft.
> As it seems, this issue can affect a design choice for the tokenization
> phases of an Applesoft front-end. Is the manual just informative or the
> online simulator does not accept (precisely) the particular dialect?
The latter; the simulator accepts a different dialect.
Jerry awanderin at gmail dot com
Return to the
Search the comp.compilers archives again.