Uhm, no. Preferably not. That would be an artificial limit.

/ Per Hedbor ()

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2003-02-11 14:57: Subject: sscanf %O

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But sprintf won't produce 'x', so you are not aiming (exactly) for a reversed sprintf("%O"). I think you should.

/ Martin Nilsson (Åskblod)

Like this?

private object compile_handler = class { mapping(string:mixed) get_default_module() { return ([ "this_program":0, "aggregate":aggregate, "aggregate_mapping":aggregate_mapping, "aggregate_multiset":aggregate_multiset ]); }

mixed resolv(string id, void|string fn, void|string ch) { error( "The symbol %O is forbidden.\n", id ); } }();

mixed eval(string what) { what -= "lambda"; what -= "class"; return compile_string( "mixed foo=" + what + ";", 0, compile_handler )()->foo; }

/ Martin Nilsson (Åskblod)

Previous text:

2003-02-11 15:03: Subject: sscanf %O

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I actually aim for something that understands all non-expression constants that you can use in the Pike language, as well as the output of sprintf %O on constants that aren't objects, functions or programs.

The first almost gives the second. I believe it's only the possibility of recursive datatypes in the latter that has to expand the functionality.

/ Mirar

Sant.

/ Martin Nilsson (Åskblod)

Previous text:

2003-02-11 15:14: Subject: sscanf %O

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Det där torde väl göra fel på till exempel indatat

({ "class", "lambda" })

/ Niels Möller ()

It _is_ the code for the eval tag, with minor modifications.

/ Martin Nilsson (Åskblod)

Previous text:

2003-02-11 15:16: Subject: sscanf %O

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Yes, the whole approach reminds me of the Roxen eval tag, which removed the letter "s" from the input code so that it would not be possible to call the system() function... :-)

/ Marcus Comstedt (ACROSS) (Hail Ilpalazzo!)

Why try to disallow class and lambda for the eval tag?

/ Niels Möller ()

Previous text:

2003-02-11 15:19: Subject: sscanf %O

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It _is_ the code for the eval tag, with minor modifications.

/ Martin Nilsson (Åskblod)

I understand that, what I asked was if and why you also do that in the eval-tag.

/ Niels Möller ()

Previous text:

2003-02-11 15:38: Subject: sscanf %O

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To prevent that user defined code is executed when the data structure is read. Not that it would be able to do much... I wan't an assurance that sscanf %O (or at least one of its modes) only returns 1=int|float|string|array(@1)|mapping(@1:@1)|multiset(@1)

/ Martin Nilsson (Åskblod)

It must also be possible to continue to parse after the constant, see the value " gurka" in my example.

Also, you don't support recursive data, do you? Ie, ({@0}).

/ Mirar

Previous text:

2003-02-11 15:11: Subject: sscanf %O

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Like this?

private object compile_handler = class { mapping(string:mixed) get_default_module() { return ([ "this_program":0, "aggregate":aggregate, "aggregate_mapping":aggregate_mapping, "aggregate_multiset":aggregate_multiset ]); }

mixed resolv(string id, void|string fn, void|string ch) { error( "The symbol %O is forbidden.\n", id ); } }();

mixed eval(string what) { what -= "lambda"; what -= "class"; return compile_string( "mixed foo=" + what + ";", 0, compile_handler )()->foo; }

/ Martin Nilsson (Åskblod)