Re: [F-Script-talk] Multiple Blocks

[Jeremy S. <js...@ga...>]

Thanks Ken.  Works like a charm.

On Sep 8, 2006, at 2:04 AM, Ken Ferry wrote:

> On 9/7/06, Jeremy Sacket <js...@ga...> wrote:
>>
>> I am trying to implement extensions into my app.  I am wanting to  
>> define
>> blocks in one file and then run only blocks that I call.
>> Example:
>>
>> [
>>  name:=[ sys log:('Jeremy').]
>>  description:=[ :des| sys log:('des).]
>> ]
>>
>> Now I want to just execute the "name" block.
>
> Executing the big outer block will dump a definition for 'name' and
> 'description' in the enviroment that executes the block.  Executing
> the outer block will not execute the inner blocks.  So, you could do
> this:
>
> (typed in gmail, and skipping all the error handling for conciseness.
> Note that the example string above won't compile as a block.)
>
>> -(id)runProcedure
>> {
>>  // will set fscript to the above example.
>>  NSString *fscript = [procedure objectForKey:@"procedure"];
>
>   FSInterpreter *interpreter = [FSInterpreter interpreter];
>   System *sys = [interpreter objectForIdentifier:@"sys" found:NULL];
>   Block *outerBlock = [sys blockFromString:fscript]; // block is
> compiled in the environment of the interpreter
>   [outerBlock value]; //.. so the 'name' identifier is bound in the  
> interpreter
>   Block *nameBlock = [interpreter objectForIdentifier:@"name"  
> found:NULL];
>   [nameBlock value];
> }
>
> It might seem a little less indirect if the file contained statements
> without the big enclosing block.  Then you could use -[FSInterpreter
> execute:] to execute the string, and -[FSInterpreter
> objectForIdentifier:found:] to retrieve the blocks bound in the
> interpreter as a result.
>
> -Ken
>
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