[Swift-devel] mapper syntax

[Ben Clifford]

The syntax:

  imagefiles if[] 
<my_mapper;foo=@strcat(filename,blah),otherparm=true,moreparams=false>;

is rather noisy all on one line.

A syntax change could be to express the above as:

  imagefiles if[] map my_mapper {
    foo = @strcat(filename,blah);
    otherparam = true;
    moreparams = false;
  };


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