Re: Atomic expression?

[Mats Bengtsson]

Quoting Graham Percival <address@hidden>:
> > IMO this is not so easy. [Numerical or symbolical] math expressions
> > can substitute another expressions as long as sintaxis allows it.
> > But, can e'1 without curly braces substitute a true expression as {
> > e'1 } ?
>
> No, but this is a problem about documentation (which was the 
> motivation for the question).  Now that I know the answer, I can 
> phrase the docs to explain this.

I'm not exactly sure what your "No" refers to. Both e'1 and {e'1} 
constitute music expressions. Consider for example the following
situations:

\relative c' {
\repeat volta 2 e1 | \grace c8 d1 |
}

where you don't need the curly braces around e1 and c8, respectively.

(Sorry Graham, I know that you know these things, just wanted to 
clarify to Francisco and other reading this thread).

  /Mats