Re: Atomic expression?

[Graham Percival]

Francisco Vila wrote:
> I'm sorry, cannot find an earlier message where Mr. percival asked if
> "e'1" is an expression. He was aswered yes, just as "1" is a
> (minimal) math expression.
>
> 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.

Cheers,
- Graham Percival, LilyPond Documentation Editor