I've sometimes wished for a while ... else combination in C.
-But I never got around to proposing my suggestion to whoever or
whatever committee is in charge of the C language.
But since D is a language that has much more freedom regarding
implementation, I'd like to suggest it here. :)
This is my usual code:
if(c >= '0' && c <= '9')
{
/* number */
while(c >= '0' && c <= '9')
{
c = *s++;
... do something with c ...
}
}
else if((c >= 'A' && c <= 'Z') || (c >='a' && c <= 'z') || c ==
'_')
{
/* token */
while((c >= 'A' && c <= 'Z') || (c >='a' && c <= 'z') || c ==
'_')
{
c = *s++;
}
}
else if(debug)
{
/* error */
}
... The arguments for 'if' and 'while' are the same, and the
initial test could be reduced to a single test instead of
multiple tests...
while(c >= '0' && c <= '9')
{
/* number */
c = *s++;
... do something with c ...
}
else while((c >= 'A' && c <= 'Z') || (c >='a' && c <= 'z') || c
== '_')
{
/* token */
c = *s++;
}
else if(debug)
{
/* error */
}
... Ah, much more readable.
This makes it possible to repeat actions, in case a statement is
true, generalizing the while statement slightly.
Thus... If we for instance enter the first while(...), then we
will not enter any of the 'else' statements.
