On Jul 28, 11:02 am, Meikel Brandmeyer <m...@kotka.de> wrote:
> Hi,
>
> On Jul 28, 3:47 am, Rob <rob.nikan...@gmail.com> wrote:
>
> > (defmacro something [a ...]
> > (if (not (symbol? a))
> > (let [loc (get-source-location a)]
> > (throwf "file: %s line: %s a should be a symbol" (loc :file)
> > (loc :line)
> > ...
>
> > Thoughts?
>
> Is this really necessary? Just throwing an exception should look like
> this:
> #<CompilerException java.lang.IllegalArgumentException: foo was not a
> bar (source_file_and_line_number_here.clj:45)>
>
> The file and line information is shown in the CompilerException, no?
It's not necessary for simple macros, but I think it helps for fancier
ones. The line number in the CompilerException looks like it's the
line number of the macro "call" so imagine a macro like `define-class'
that has 100s of lines of code.
(define-class ; line 5
...
a-mistake ; line 300
...
>From what I'm seeing, the CompilerException points to line 5.
Rob
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