mv "Truth and Falsehood" from perlsyn to perldata

This one-paragraph section didn't belong in perlsyn.  perldata already
had a paragraph on the topic; merge them.  [perl #115650]

diff --git a/pod/perldata.pod b/pod/perldata.pod
index b390e67..9d714f2 100644 (file)
--- a/pod/perldata.pod
+++ b/pod/perldata.pod
@@ -320,12 +320,17 @@ are considered pretty much the same thing for nearly all purposes,
 references are strongly-typed, uncastable pointers with builtin
 reference-counting and destructor invocation.
 
+X<truth> X<falsehood> X<true> X<false> X<!> X<not> X<negation> X<0>
+X<boolean> X<bool>
 A scalar value is interpreted as FALSE in the Boolean sense
 if it is undefined, the null string or the number 0 (or its
 string equivalent, "0"), and TRUE if it is anything else.  The
 Boolean context is just a special kind of scalar context where no 
 conversion to a string or a number is ever performed.
-X<boolean> X<bool> X<true> X<false> X<truth>
+Negation of a true value by C<!> or C<not> returns a special false value.
+When evaluated as a string it is treated as C<"">, but as a number, it
+is treated as 0.  Most Perl operators
+that return true or false behave this way.
 
 There are actually two varieties of null strings (sometimes referred
 to as "empty" strings), a defined one and an undefined one.  The

diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index b9f02db..63b8cdc 100644 (file)
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -290,6 +290,12 @@ rather than in terms of the physical data structures.
 
 =item *
 
+The section "Truth and Falsehood" in L<perlsyn> has been removed from
+that document, where it didn't belong, and merged into the existing
+paragraph on the same topic in L<perldata>.
+
+=item *
+
 XXX Description of the change here
 
 =back

diff --git a/pod/perlsyn.pod b/pod/perlsyn.pod
index e2e9c6a..efe4a26 100644 (file)
--- a/pod/perlsyn.pod
+++ b/pod/perlsyn.pod
@@ -116,16 +116,6 @@ C<do {}> that I<look> like compound statements, but aren't--they're just
 TERMs in an expression--and thus need an explicit termination when used
 as the last item in a statement.
 
-=head2 Truth and Falsehood
-X<truth> X<falsehood> X<true> X<false> X<!> X<not> X<negation> X<0>
-
-The number 0, the strings C<'0'> and C<"">, the empty list C<()>, and
-C<undef> are all false in a boolean context.  All other values are true.
-Negation of a true value by C<!> or C<not> returns a special false value.
-When evaluated as a string it is treated as C<"">, but as a number, it
-is treated as 0.  Most Perl operators
-that return true or false behave this way.
-
 =head2 Statement Modifiers
 X<statement modifier> X<modifier> X<if> X<unless> X<while>
 X<until> X<when> X<foreach> X<for>
@@ -304,7 +294,7 @@ language construct, as everyone reading your code will have to think at least
 twice before they can understand what's going on.
 
 The C<while> statement executes the block as long as the expression is
-L<true|/"Truth and Falsehood">.
+true.
 The C<until> statement executes the block as long as the expression is
 false.
 The LABEL is optional, and if present, consists of an identifier followed