Re: handling basic Makefile as domain specific language

Hi Oliver,

When I wrote the phone book example for Bruce, : was not treated as part of the identifier. Had I known it was going to become part of the identifier, I would have wrote it differently to avoid confusion for the user.

Your only real option is to force a whitespace between the identifier and the : to get around Io's use of it (solely for the purposes of the objc bridge I might add). Alternatively, you can write an actual parser and skip the DSL route.  

Regards,

Jeremy Tregunna


On Sunday, 15 April, 2012 at 4:08 PM, Oliver Kiddle wrote:

>    
> After reading Bruce A. Tate's 7 languages book, I wondered whether it
> would be possible to configure IO to support the basic dependency syntax
> of Unix make. I'm not concerned with full Makefiles, just the type of
> output that you get from gcc with the -M (or -MM) options and similar
> tools. At worst, this might be something like:
>  
> # comment
> file.o: \
> file.h \
> file.cpp
>  
> IO already accepts \ for continuation lines and # for comments so I
> thought I'd just need to define : as an assignment operator but this is
> where I've hit a snag.
>  
> With “file: dep”, the colon appears to be treated as part of the
> identifier. However, you can happily enter 1+1 so the same problem does
> not apply to “+”. This doesn't seem to match my understanding of IO's
> grammar. Trying with :=, I get the following:
>  
> Io> value:="string"
>  
> Exception: Slot value: not found. Must define slot using := operator before updating.
> ---------
> message 'updateSlot' in 'Command Line' on line 1
>  
> Io> value := "string"
> ==> string
>  
> Is there any workaround for this?
>  
> I've used “call argAt(1) asString” to get the arguments in the
> definition of the : operator. Is anyone aware of any parsing applied on
> that argument that might prove troublesome?
>  
> Thanks
>  
> Oliver Kiddle
>  
> PS. Sorry if you receive this mail twice, I tried to send it shortly
> after subscribing but it never arrived in the Yahoo group.
>