Re: fmt2.myr: Landed new string formatting code.

[Ryan Gonzalez <rymg19@xxxxxxxxx>]

Yeah, I just found it odd. In Python, the braces are the placeholder *and* the options list.


On June 7, 2015 3:30:46 PM CDT, Ori Bernstein <ori@xxxxxxxxxxxxxx> wrote:
>Braces are only for specifying options. % is the placeholder.
>
>
>    std.fmt("% % %", 1, 2, 255) => "1, 2, 255"
>    std.fmt("% % %{x}", 1, 2, 255) => "1, 2, ff"
>
>On Sun, 07 Jun 2015 12:56:35 -0500
>Ryan Gonzalez <rymg19@xxxxxxxxx> wrote:
>
>> Looks neat! One thing: it seems weird to specify a percent *and* the
>braces. Python uses no percent with the .format function; it's just the
>braces.
>> 
>> I can test it on Plan 9 once I can figure out how to "git pull" with
>an rc script I found...
>> 
>> Curiosity: how to you commit changes to the repo from Plan 9?
>> 
>> 
>> On June 7, 2015 11:57:10 AM CDT, Ori Bernstein <ori@xxxxxxxxxxxxxx>
>wrote:
>> >I've got a new version of std.fmt() which uses the generated type
>info
>> >to know the types of its arguments, and which can support custom
>format
>> >functions.
>> >
>> >Format strings are now very different. '%' is the value placeholder.
>> >There are no other specifiers. Formatting options are passed via the
>> >'{opts}' after the placeholder. '%%' escapes the '%', so that a
>single
>> >'%' is printed. {} is the empty parameter list, and needs to be
>passed
>> >if you are printing a { immediately after a placeholder. Examples:
>> >
>> >    std.f2put("x=%\n", 123)
>> >        prints "x=123"
>> >
>> >    std.f2put("x=%{x}\n", 255)
>> >        prints "x=ff"
>> >
>> >    std.f2put("x=%{}{asdf}\n", 123)
>> >        prints "x=123{asdf}"
>> >
>> >    std.f2put("x=%, %\n", 255)
>> >        Kills your program because your arg list doesn't match the
>> >        format string (there are too few args)
>> >
>> >    std.f2put("x=%\n", 123, 456)
>> >        Kills your program because your arg list doesn't match the
>> >        format string (there are too many args)
>> >
>> >
>> >It hasn't replaced std.fmt() yet, and is accessible via the f2fmt()
>> >functions, but I intend to kill off the current std.fmt as soon as
>> >I verify that this is working well on plan9.
>> >
>> >Code is here:
>> >    http://git.eigenstate.org/ori/mc.git/tree/libstd/fmt2.myr
>> >
>> >It depends on the new type introspection api:
>> >    http://git.eigenstate.org/ori/mc.git/tree/libstd/introspect.myr
>> >
>> >API design reviews would be welcome. I'm not sure how happy I am
>> >with the introspection API, although I do like that it lets me
>> >look at stuff without descending into it, and without needing any
>> >heap allocations.
>> >
>> >-- 
>> >Ori Bernstein <ori@xxxxxxxxxxxxxx>
>> 
>> -- 
>> Sent from my Android device with K-9 Mail. Please excuse my brevity.
>
>
>-- 
>Ori Bernstein <ori@xxxxxxxxxxxxxx>

-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.