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Make subroutine prototypes mandatory.

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The main code should be wrapped in a MAIN:{ ... } declaration.

Suggested by:	des
This commit is contained in:
joe 2000-10-18 17:21:54 +00:00
parent 440545207b
commit d1eac60c8c
1 changed files with 20 additions and 0 deletions
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20
share/man/man7/style.perl.7
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@ -66,6 +66,26 @@ is documented in
#!/usr/bin/perl -wT #!/usr/bin/perl -wT
.Ed .Ed
.Pp .Pp
The main program should be placed in a block labeled MAIN:. This
makes it easier to identify the entry point in a large perl script,
and provides a scope for variables which are used in the main
program but nowhere else.
.Bd -literal -offset 0i
MAIN:{
print(foo("/usr/bin/man", "7", "style.perl"));
exit(0);
}
.Ed
.Pp
All subroutines should be defined using argument prototypes as defined in
.Xr perlsub 1 .
.Bd -literal -offset 0i
sub foo($@) {
my $cmd = shift;
my @args = @_;
}
.Ed
.Pp
All variables should be defined before use; this is enforced if operating All variables should be defined before use; this is enforced if operating
under under
.Fa use strict . .Fa use strict .