From: Rick DeNatale <rick.denatale@...>
Date: 2006-08-06T14:10:09+09:00
Subject: Re: Whitespace matters in instance_eval? I'm confused

On 8/6/06, Harold Hausman <hhausman@gmail.com> wrote:

> irb(main):004:0> foo.instance_eval "3.times\n{ puts 'boom' \n}"
> SyntaxError: (eval):3:in `irb_binding': compile error
> (eval):2: syntax error
> { puts 'boom'
>         ^
> (eval):3: syntax error
>         from (irb):4
>
> #is there a rule that says that the opening curly brace has to be on
> the same line?

I think that it pretty much falls out of the way Ruby handles lines in
source.  As the pickaxe put's it Ruby is 'line-oriented'

1) An expression or statement which looks like complete by the end of
the line IS considered complete

2) Blocks are optional in method calls, so
     3.times
    looks like (and is a complete expression, and a complete statement)

3) a bare block is not a valid statement

It's got nothing to do with instance_eval

irb(main):001:0> 3.times
LocalJumpError: no block given
        from (irb):1:in `times'
        from (irb):1
irb(main):002:0> { puts "boom" }
SyntaxError: compile error
(irb):2: parse error, unexpected tSTRING_BEG, expecting kDO or '{' or '('
{ puts "boom" }
        ^
(irb):2: parse error, unexpected '}', expecting $
        from (irb):2
irb(main):003:0>



-- 
Rick DeNatale