Why I don't like Slim

gistfile1.md

Confusing syntax

The following are equivalent:

h1 Lorem
   Ipsum

h1 
  | Lorem
  | Ipsum

h1 
  | Lorem
    Ipsum

The following works, since everything after '=' is just Ruby:

h1 = lorem_ipsum_helper

...until it contains a comment:

h1 = lorem_ipsum_helper  # this comment will break Slim

Here's an example of attributes in Slim:

h1 class="foo" Foo

The cool thing is, the bit after the '=' is really just Ruby. So the following would call a 'foo' method:

h1 class=foo Foo

Arrays work as well:

h1 class=["foo", "bar"] Foo

But don't go too crazy with Ruby, because this won't work:

h1 class=["foo"]+["bar"] Foo

Annoying whitespace handling

This will print both words without any whitespace between them:

| Foo
| Bar

This is how you append a single whitespace to some plain text:

' Foo

This is how you do it in a Ruby evaluation line:

=' foo_method

But if you just want to use an element with plain text, it's impossible. The following will not work:

span' Foo

Additional points:

• Slim "Ugly" and Slim "Pretty" produce semantically different output (since "ugly" strips all whitespace, even between span-level elements.)

Please add some notes about performance!