[Denemo-devel] [bug #29825] Many scripts avoid (if expr for expr not boolean

[Richard Shann]

URL:
  <http://savannah.gnu.org/bugs/?29825>

                 Summary: Many scripts avoid (if expr for expr not boolean
                 Project: GNU Denemo, a gtk+ frontend to GNU Lilypond
            Submitted by: rshann
            Submitted on: Sat May  8 09:32:47 2010
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

In the guile docs there is the statement

“true” means any value at all except #f

so the many occurrences of (boolean?  expr) in our scripts are unnecessarily
obscure, as what they are trying to test is if the returned value is not a
string but #f

This infelicitous construction will be copied by others if we do not nip it
in the bud. (Reading Nils' paste code triggered the detection of this, thank
you Nils).




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