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authorGurusamy Sarathy <gsar@cpan.org>2000-03-03 18:58:45 +0000
committerGurusamy Sarathy <gsar@cpan.org>2000-03-03 18:58:45 +0000
commitc47ff5f1a1ef5d0daccf1724400a446cd8e93573 (patch)
tree8a136c0e449ebac6ea6e35898b5ae06788800c41 /pod/perlboot.pod
parent10c8fecdc2f0a2ef9c548abff5961fa25cd83eca (diff)
downloadperl-c47ff5f1a1ef5d0daccf1724400a446cd8e93573.tar.gz
whitespace and readabiliti nits in the pods (from Michael G Schwern
and Robin Barker) p4raw-id: //depot/perl@5493
Diffstat (limited to 'pod/perlboot.pod')
-rw-r--r--pod/perlboot.pod26
1 files changed, 13 insertions, 13 deletions
diff --git a/pod/perlboot.pod b/pod/perlboot.pod
index dbf4fc998c..bab365609e 100644
--- a/pod/perlboot.pod
+++ b/pod/perlboot.pod
@@ -67,7 +67,7 @@ Or is it?
=head2 Introducing the method invocation arrow
-For now, let's say that C<Class-E<gt>method> invokes subroutine
+For now, let's say that C<< Class->method >> invokes subroutine
C<method> in package C<Class>. (Here, "Class" is used in its
"category" meaning, not its "scholastic" meaning.) That's not
completely accurate, but we'll do this one step at a time. Now let's
@@ -176,8 +176,8 @@ This method provides the constant text for the sound itself.
}
}
-Now, when we call C<Cow-E<gt>speak>, we get a C<$class> of C<Cow> in
-C<speak>. This in turn selects the C<Cow-E<gt>sound> method, which
+Now, when we call C<< Cow->speak >>, we get a C<$class> of C<Cow> in
+C<speak>. This in turn selects the C<< Cow->sound >> method, which
returns C<moooo>. But how different would this be for the C<Horse>?
{ package Horse;
@@ -214,7 +214,7 @@ with the animal-specific sound:
Note the added C<@ISA> array. We'll get to that in a minute.
-But what happens when we invoke C<Cow-E<gt>speak> now?
+But what happens when we invoke C<< Cow->speak >> now?
First, Perl constructs the argument list. In this case, it's just
C<Cow>. Then Perl looks for C<Cow::speak>. But that's not there, so
@@ -227,7 +227,7 @@ with the already frozen argument list.
Inside the C<Animal::speak> subroutine, C<$class> becomes C<Cow> (the
first argument). So when we get to the step of invoking
-C<$class-E<gt>sound>, it'll be looking for C<Cow-E<gt>sound>, which
+C<< $class->sound >>, it'll be looking for C<< Cow->sound >>, which
gets it on the first try without looking at C<@ISA>. Success!
=head2 A few notes about @ISA
@@ -295,13 +295,13 @@ which results in:
a Mouse goes squeak!
[but you can barely hear it!]
-Here, C<Mouse> has its own speaking routine, so C<Mouse-E<gt>speak>
-doesn't immediately invoke C<Animal-E<gt>speak>. This is known as
+Here, C<Mouse> has its own speaking routine, so C<< Mouse->speak >>
+doesn't immediately invoke C<< Animal->speak >>. This is known as
"overriding". In fact, we didn't even need to say that a C<Mouse> was
an C<Animal> at all, since all of the methods needed for C<speak> are
completely defined with C<Mouse>.
-But we've now duplicated some of the code from C<Animal-E<gt>speak>,
+But we've now duplicated some of the code from C<< Animal->speak >>,
and this can once again be a maintenance headache. So, can we avoid
that? Can we say somehow that a C<Mouse> does everything any other
C<Animal> does, but add in the extra comment? Sure!
@@ -322,7 +322,7 @@ First, we can invoke the C<Animal::speak> method directly:
Note that we have to include the C<$class> parameter (almost surely
the value of C<"Mouse">) as the first parameter to C<Animal::speak>,
since we've stopped using the method arrow. Why did we stop? Well,
-if we invoke C<Animal-E<gt>speak> there, the first parameter to the
+if we invoke C<< Animal->speak >> there, the first parameter to the
method will be C<"Animal"> not C<"Mouse">, and when time comes for it
to call for the C<sound>, it won't have the right class to come back
to this package.
@@ -429,7 +429,7 @@ and the C<Horse> class:
sub sound { "neigh" }
}
-This lets us invoke C<Horse-E<gt>speak> to ripple upward to
+This lets us invoke C<< Horse->speak >> to ripple upward to
C<Animal::speak>, calling back to C<Horse::sound> to get the specific
sound, and the output of:
@@ -506,7 +506,7 @@ the name:
$$self;
}
}
-
+
Now we call for the name:
print $talking->name, " says ", $talking->sound, "\n";
@@ -695,8 +695,8 @@ Let's make a sheep that has a name and a color:
my $bad = bless { Name => "Evil", Color => "black" }, Sheep;
-so C<$bad-E<gt>{Name}> has C<Evil>, and C<$bad-E<gt>{Color}> has
-C<black>. But we want to make C<$bad-E<gt>name> access the name, and
+so C<< $bad->{Name} >> has C<Evil>, and C<< $bad->{Color} >> has
+C<black>. But we want to make C<< $bad->name >> access the name, and
that's now messed up because it's expecting a scalar reference. Not
to worry, because that's pretty easy to fix up: