Re: [boost] Query of interest for a container output library

Subject: Re: [boost] Query of interest for a container output library
From: Paul A. Bristow (pbristow_at_[hidden])
Date: 2013-01-31 12:27:38

> -----Original Message-----
> From: Boost [mailto:boost-bounces_at_[hidden]] On Behalf Of Tal Zion
> Sent: Thursday, January 31, 2013 4:26 AM
> To: boost_at_[hidden]
> Subject: Re: [boost] Query of interest for a container output library
> --
> View this message in context:
http://boost.2283326.n4.nabble.com/Query-of-interest-for-a-container-
> output-library-tp4641997p4642051.html

I don't want to muddy this conversation, but I wonder if you are ignoring Steven Watanabe's
type_erasure library  (perhaps because it's highly un- or anti-descriptive name).

http://www.boost.org/doc/libs/1_52_0/doc/html/container/containers_of_incomplete_types.html

It provides what many users want to list containers without much tiresome typing or any troublesome
'typing'.

But (at the price of some compile time) it *also provides very easy (and quite fancy) formatting*.

Steven's simple example is:
int test[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

separator_printer p1(",  "); // Construct a sequence printer with comma separator.
p1.print(std::cout, test); // Outputs: 1,2,3,4,5,6,7,8,9,10

where test could be any ostreamable container.

but with a little more work one can produce other 'printers' which give a lot of layout control
using parameters, for example:

decor_printer p1decor("int[10] = {", ",  ", "};\n"); // Construct a sequence printer with prefix {,
comma separator and } newline terminator.

A few typical (and more fancy) examples of output are:

1,  2,  3,  4,  5,  6,  7,  8,  9,  10
  1,  2,  3,  4,  5,  6,  7,  8,  9,  10|
  int[10] = {1,  2,  3,  4,  5,  6,  7,  8,  9,  10};
  1___2___3___4___5___6___7___8___9___10
  1,  2,  3,  4,  5,  6,  7,  8,  9,  10
  
  +1.0000,  +2.0000,  +3.0000,  +4.0000,  +5.0000,  +6.0000,  +7.0000,  +8.0000,  +9.0000,  +10.000
  
  2345.6 m,  123.40 m,  0.012300 m
  45210.(+/-1234.0) m,  789.00(+/-2.5000) m,  0.00056700(+/-2.3400e-005) m
  one,  two,  three,  four,  five,  six,  seven,  eight,  nine,  ten
  ONE,  TWO,  THREE,  FOUR,  FIVE,  SIX,  SEVEN,  EIGHT,  NINE,  TEN
  1,2,3,4,
  5,6,7,8,
  9,10
                 1               4               7              10
                 2               5               8
                 3               6               9
  
  1.0000,  2.0000,  3.0000,  4.0000,  5.0000,  6.0000,  7.0000,  8.0000,  9.0000,  10.000
  1.0000,2.0000,3.0000,4.0000,
  5.0000,6.0000,7.0000,8.0000,
  9.0000,10.000
  3.0000,4.0000,5.0000,6.0000,
  7.0000
  0, -2.0000
  1, 9.9000
  1, 9.9000
  4, 6.6000
  1, 9.9000
  2, 8.8000
  3, 7.7000
  4, 6.6000
  
  1, 9.9000,2, 8.8000,3, 7.7000,4, 6.6000
  
  1.23 +/-0.056 (42)
  1.23 +/-0.056 (42),4.56 +/-0.021 (99)
  1.23 +/-0.056 (42) First #1, 2012-Aug-10 10:03:35
  4.56 +/-0.021 (99) Second #1, 2012-Aug-08 10:01:56
  1.23 +/-0.056 (42) First #1, 2012-Aug-10 10:03:35,4.56 +/-0.021 (99) Second #1, 2012-Aug-08
10:01:56

Some are probably messed up by the browser but you will get the flavour.

Paul