Re: BUG: AppleScript compilation problems
Re: BUG: AppleScript compilation problems
- Subject: Re: BUG: AppleScript compilation problems
- From: Mark Alldritt <email@hidden>
- Date: Fri, 18 Apr 2003 10:30:23 -0700
>
Here are a couple of bugs involving the compiling of comments in
>
AppleScript:
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>
>
1. A block comment can't contain an odd number of double-quote characters:
>
>
(*
>
"
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*)
>
>
--> compilation error
This is deliberate. Because AS allows you to nest block comments, it does
some parsing of the comment's contents. By introducing the beginning of a
string, its going to keep going until it sees the end quote.
This is explained in the AppleScript language guide (page 26 in my original
hardcopy version).
>
I can understand how this could happen because, when parsing source code,
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something has to take precedence. In the previous case, a literal string
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takes precedence over a block comment, though in the next case a single-line
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comment takes precedence over a literal string:
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>
--"
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--> compiles OK
Right, because a line comment simply consumes everything after it on the
line and does no parsing of the comment contents.
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2. A single-line comment containing a literal line-feed character (ASCII
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number 10) will not compile:
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a. Compile the following line:
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"\n"
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b. then comment the line out ("--") and recompile.
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>
--> compilation error
Agreed, its a bug. I suspect that AS's parsing is not expecting a non-Mac
OS line ending here. Similarly, if you compile a block-comment containing
Unix line endings, AppleScript does not convert them to Mac OS line endings
as I believe it should (it converts line endings to Mac line endings in all
other cases).
Cheers
-Mark
---------------------------------------------------------------------
Mark Alldritt Late Night Software Ltd.
Phone: 250-380-1725 333 Moss Street
FAX: 250-383-3204 Victoria, B.C.
WEB:
http://www.latenightsw.com/ CANADA V8V-4M9
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