> for the 64-bit version at last we have a long-missed feature: A > substantial backtrace mechanism.
Great! > - a new function 'trail', which returns the complete backtrace as a > list. Staying with the hype-terminology, we may call this a "first > class backtrace" ... OK, just kidding, no big thing :) If the "first class" backtrace would be modifiable programmatically, it would allow for a whole new range of control structures, in some aspect possibly going beyond what's implementable by call/cc. That would be a big thing. > - an extension to 'up' which returns the current expressions (or the nth > expression if a numeric argument is passed) > > Note that 'up' now allows to implement things which were until now only > possible in FSUBRs (i.e. on assembly level), because the CAR of the > expression (the function or method) are not passed to EXPRs or FEXPRs. I proposed this feature on Jan 26, 2012, so at least for me this is also a long-missed feature. This will among other things allow redefinition of the message passing (or method execution) function, and a 'defmacro' that is cleaner than my example from a week ago. Question: How hard would it be to extend 'up' the same way in pil32? -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
