From: alexey.muranov@...
Date: 2014-03-27T13:36:43+00:00
Subject: [ruby-core:61716] [CommonRuby - Feature #9678] New heredoc syntax

Issue #9678 has been updated by Alexey Muranov.


I try to summarize again, hopefully better, and with a bit different syntax.

### Example

    class C
      def f(x)
        print <<Message1: + <<Message2: + <<Message3:
    Message1:
    > 1. Some text
    >    without any intepolation (#{ x }) or escape sequences (\n)
    >
    Message2:
    >> 2. Some text\
    >>    with interpolation (#{ x }) and escape sequences.\n
    Message3:
    >> 3. Some mixed text: \
    > #{ x } is replaced with
    >> #{ x }
      end
    end

    C.new.f(42)

should print

    1. Some text
       without any intepolation (#{ x }) or escape sequences (\n)

    2. Some text   with interpolation (42) and escape sequences.

    3. Some mixed text: #{ x } is replaced with
    42

### Explanation

In each line preceeded with single `>`, the leading `>` and one space are
removed, and the rest is interpreted as a single-quoted string:

    > <line content>

is the same as

    '<line content>
    '

In each line preceeded with `>>`, the leading `>>` and one space are
removed, and the rest is interpreted as a double-quoted string:

    >> <line content>

is the same as

    "<line content>
    "

Then lines are concatenated.

I hope my proposal is more clear now.

----------------------------------------
Feature #9678: New heredoc syntax
https://bugs.ruby-lang.org/issues/9678#change-45959

* Author: Alexey Muranov
* Status: Feedback
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
----------------------------------------
For whatever it is worth, i've just had this idea of a new heredoc syntax for some programming language:

    class C
      def f(x)
        print >>Message1 + >>Message2
    Message1:
    > Literal text
    > ------------
    > Here text.
    >
    Message2:
    >> Text with interpolation and escapes
    >> -----------------------------------
    >> Here text with interpolation: #{ x }.
    >>
      end
    end



-- 
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